CN113251650A - Air conditioner, heat exchanger and heat exchanger refrigerant flow control method - Google Patents

Air conditioner, heat exchanger and heat exchanger refrigerant flow control method Download PDF

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Publication number
CN113251650A
CN113251650A CN202110575956.4A CN202110575956A CN113251650A CN 113251650 A CN113251650 A CN 113251650A CN 202110575956 A CN202110575956 A CN 202110575956A CN 113251650 A CN113251650 A CN 113251650A
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Prior art keywords
heat exchanger
pressure regulating
refrigerant
outlet pipelines
pipeline
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CN202110575956.4A
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张仕强
朱世强
周冰
周潮
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202110575956.4A priority Critical patent/CN113251650A/en
Publication of CN113251650A publication Critical patent/CN113251650A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The application relates to an air conditioner, a heat exchanger and a heat exchanger refrigerant flow control method, and relates to the field of heat exchange. This heat exchanger includes: the heat exchanger comprises a heat exchanger body, a heat exchanger outlet pipeline and a pressure regulating assembly; the heat exchanger body is connected with the input ends of N heat exchanger outlet pipelines, the output ends of S heat exchanger outlet pipelines are connected with the input end of a pressure regulating assembly, and the output ends of N-S heat exchanger outlet pipelines except the S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines are connected with the output end of the pressure regulating assembly and then connected with a refrigerant output pipeline, wherein N is larger than 1, S is smaller than or equal to N, S is not smaller than 1, and the heights of the N heat exchanger outlet pipelines are different; and the pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers. This application is used for solving receiving the influence of gravity, and the refrigerant volume of the not co-altitude pipeline of heat exchanger distributes unreasonable problem.

Description

Air conditioner, heat exchanger and heat exchanger refrigerant flow control method
Technical Field
The application relates to the field of heat exchange, in particular to an air conditioner, a heat exchanger and a method for controlling refrigerant flow of the heat exchanger.
Background
At present, the single system design capacity of the air-cooled heat pump unit is increasingly large, the heat exchanger is also increasingly large in design, and the height is increasingly high.
For the vertical heat exchanger, along with the heightening of the heat exchanger, the refrigerant quantity distribution of pipelines with different heights of the heat exchanger is more and more obviously influenced by gravity, the refrigerant quantity of the heat exchanger pipeline with small height is more, and the refrigerant quantity of the heat exchanger pipeline with large height is less. Particularly for a top air outlet type unit, a fan is arranged at the top of the unit, the distance between a heat exchanger pipeline with small height and the fan is far, the air speed of the heat exchanger pipeline with small height is slow, the amount of vaporized refrigerants is small, the distance between a heat exchanger pipeline with large height and the fan is short, the air speed of the heat exchanger pipeline with large height is fast, and the amount of vaporized refrigerants is large.
The refrigerant volume and the heat exchange efficiency of pipelines with different heights of the heat exchanger are greatly different, so that the heat exchanger is more difficult in pipeline design, the heat exchange efficiency of the heat exchanger cannot be maximized, the problems that the unit is frequently frosted and has poor heating effect and the like due to low complete machine energy efficiency under severe conditions are caused.
Disclosure of Invention
The application provides an air conditioner, a heat exchanger and a heat exchanger refrigerant flow control method, which are used for solving the problem that refrigerant flow distribution of pipelines with different heights of the heat exchanger is unreasonable due to the influence of gravity.
In a first aspect, an embodiment of the present application provides a heat exchanger, including: the heat exchanger comprises a heat exchanger body, a heat exchanger outlet pipeline and a pressure regulating assembly;
the heat exchanger body is connected with input ends of N heat exchanger outlet pipelines, output ends of S heat exchanger outlet pipelines are connected with input ends of the pressure regulating assembly, and output ends of N-S heat exchanger outlet pipelines except the S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines are connected with output ends of the pressure regulating assembly and then connected with a refrigerant output pipeline, wherein N is larger than 1, S is smaller than or equal to N, S is not smaller than 1, and the N heat exchanger outlet pipelines are different in height;
and the pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers.
Optionally, the S heat exchanger outlet pipelines are the first S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines, which are ranked from low to high.
Optionally, the pressure regulating assembly comprises at least one pipe;
the sum of the length of the distribution pipe and the length of any one of the S heat exchanger outlet pipelines is larger than the length of any one of the N-S heat exchanger outlet pipelines, and/or the pipe diameter of the distribution pipe is smaller than the pipe diameter of the heat exchanger outlet pipeline.
Optionally, the pressure regulating assembly includes S pipes;
the input ends of the S distribution pipes are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and the output ends of the S distribution pipes are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
Optionally, the pressure regulating assembly includes M pipes, where M is smaller than S;
l in outlet pipelines of the S heat exchangersiAfter the output end of the outlet pipeline of each heat exchanger is connected, the outlet pipeline of each heat exchanger is connected with the input end of the ith pipeline in the M pipelines, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure BDA0003084370280000021
and the output ends of the M distribution pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
Optionally, the pressure regulating assembly includes S + M pipes, where M is smaller than S;
the input ends of S distribution pipes are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and L in the S distribution pipesiAfter the output ends of the pipes are connected, the output ends of the pipes are connected with the input end of the ith pipe in M pipes except the S pipes in the S + M pipes, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure BDA0003084370280000022
and the output ends of the M distribution pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
Optionally, the pressure regulating assembly comprises at least one controllable valve.
Optionally, the pressure regulating assembly comprises S controllable valves;
the input ends of the S controllable valves are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and the output ends of the S controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
Optionally, the pressure regulating assembly comprises M controllable valves, M being smaller than S;
l in outlet pipelines of the S heat exchangersiThe output end of the outlet pipeline of each heat exchanger is connected with the input end of the ith controllable valve in the M controllable valves, wherein i is not less than 1 and i is not more than M, LiNot less than 1 and
Figure BDA0003084370280000031
and the output ends of the M controllable valves are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
Optionally, the pressure regulating assembly includes S + M controllable valves, M being smaller than S;
the input ends of the S controllable valves are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and L in the S controllable valvesiAfter the output ends of the controllable valves are connected, the output ends of the controllable valves are connected with the input end of the ith controllable valve in the M controllable valves except the S controllable valves in the S + M controllable valves, wherein i is not less than 1 and is not more than M, LiNot less than 1 and
Figure BDA0003084370280000032
and the output ends of the M controllable valves are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
In a second aspect, an embodiment of the present application provides a method for controlling a flow rate of a refrigerant in a heat exchanger, where the method is applied to the heat exchanger in the first aspect, and includes:
detecting a refrigerant flow characterization parameter of the heat exchanger;
and adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter.
Optionally, the refrigerant flow characterization parameter includes one of an outdoor ambient temperature, a compressor operating frequency, and an evaporation pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the outdoor environment temperature is lower than a preset environment temperature value, or the operation frequency of the compressor is lower than a preset operation frequency value, or the evaporation pressure is lower than a preset evaporation pressure value, the opening degree of the controllable valve is increased.
Optionally, the refrigerant flow characterization parameter includes one of an outdoor ambient temperature, a compressor operating frequency, and an evaporation pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the outdoor environment temperature is greater than a preset environment temperature value, or the operation frequency of the compressor is greater than a preset operation frequency value, or the evaporation pressure is greater than a preset evaporation pressure value, the opening degree of the controllable valve is reduced.
Optionally, the refrigerant flow characterization parameter includes one of a superheat degree, a temperature and a pressure of any one of the N-S heat exchanger outlet pipelines; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the superheat degree of any one of the outlet pipelines of the N-S heat exchangers is greater than a preset superheat value, or the temperature is greater than a preset pipeline temperature value, or the pressure is greater than a preset pipeline pressure value, reducing the opening degree of the controllable valve.
In a third aspect, an embodiment of the present application provides a method for controlling a flow rate of a refrigerant in a heat exchanger, where the method is applied to the heat exchanger in the first aspect, and includes:
detecting a frosting state characterization parameter of the heat exchanger;
and adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the frosting state characterization parameter.
Optionally, the frosting condition characterizing parameter comprises a temperature of the heat exchanger outlet line to which the controllable valve is connected; the pressure regulating assembly comprises at least one controllable valve;
according to the frosting state characterization parameter, the refrigerant flow passing through the pressure regulating assembly is adjusted, and the method comprises the following steps:
if the temperature of the heat exchanger outlet pipeline connected with the controllable valve is lower than the preset frosting temperature, the opening degree of the controllable valve is reduced;
and if the temperature of the heat exchanger outlet pipeline connected with the controllable valve is higher than the preset frosting temperature, the opening degree of the controllable valve is increased.
Optionally, the frosting condition characterization parameter comprises a temperature of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly comprises at least one controllable valve;
according to the frosting state characterization parameter, the refrigerant flow passing through the pressure regulating assembly is adjusted, and the method comprises the following steps:
if the temperature of any one of the outlet pipelines of the N-S heat exchangers is lower than the preset frosting temperature, the opening degree of the controllable valve is increased;
and if the temperature of any one of the outlet pipelines of the N-S heat exchangers is higher than the preset frosting temperature, the opening degree of the controllable valve is reduced.
In a fourth aspect, an embodiment of the present application provides an air conditioner, including: the heat exchanger of the first aspect, and a fan;
the fan is positioned above the heat exchanger.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: the heat exchanger that this application embodiment provided connects the input of pressure regulating subassembly through the output at S heat exchanger outlet pipeline, is connected the back with the output of N-S heat exchanger outlet pipeline and the output of pressure regulating subassembly, is connected with refrigerant output pipeline, and the pressure regulating subassembly for the pressure of the refrigerant of S heat exchanger outlet pipeline of adjustment flow through. In the prior art, for a vertical heat exchanger, along with the heightening of the heat exchanger, the refrigerant quantity distribution of pipelines with different heights of the heat exchanger is more and more obviously influenced by gravity, the refrigerant quantity of the pipeline with the small height of the heat exchanger is more, and the refrigerant quantity of the pipeline with the large height of the heat exchanger is less. According to the technical scheme, the output end of the S heat exchanger outlet pipelines is connected with the input end of the pressure regulating assembly, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is adjusted, the refrigerant quantity flowing through the S heat exchanger outlet pipelines and the refrigerant quantity flowing through the N-S heat exchanger outlet pipelines are adjusted, the refrigerant quantity flowing through the S heat exchanger outlet pipelines and the refrigerant quantity flowing through the N-S heat exchanger outlet pipelines can be vaporized as much as possible, and therefore the overall heat exchange effect of the heat exchanger is improved. The problem of receive the influence of gravity, the refrigerant volume of heat exchanger different height pipelines distributes unreasonablely is solved.
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.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a heat exchanger according to an embodiment of the present application;
fig. 8 is a schematic flow chart illustrating a method for controlling refrigerant flow of a heat exchanger according to an embodiment of the present disclosure;
fig. 9 is a schematic flow chart illustrating another method for controlling refrigerant flow rate of a heat exchanger according to an embodiment of the present disclosure.
Description of reference numerals: 101-heat exchanger body, 102-N heat exchanger outlet pipelines, 103-pressure regulating assembly, 104-S heat exchanger outlet pipelines, 105-N-S heat exchanger outlet pipelines and 106-refrigerant output pipelines.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiment of the present application, as shown in fig. 1, the heat exchanger mainly includes:
the heat exchanger comprises a heat exchanger body 101, a heat exchanger outlet pipeline and a pressure regulating assembly 103;
the heat exchanger body 101 is connected with input ends of N heat exchanger outlet pipelines 102, output ends of S heat exchanger outlet pipelines 104 are connected with input ends of pressure regulating assemblies 103, and output ends of N-S heat exchanger outlet pipelines 105 except the S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines are connected with output ends of the pressure regulating assemblies 103 and then connected with a refrigerant output pipeline 106, wherein N is larger than 1, S is smaller than or equal to N, S is not smaller than 1, and heights of the N heat exchanger outlet pipelines 102 are different;
and the pressure regulating assembly 103 is used for regulating the pressure of the refrigerant flowing through the outlet pipelines 104 of the S heat exchangers.
The refrigerant output pipeline 106 is used for collecting the refrigerants output by the outlet pipelines 105 of the N-S heat exchangers and the pressure regulating assembly 103 and outputting the collected refrigerants from the heat exchangers.
Wherein, the height refers to the height of the N heat exchanger outlet pipelines 102 in the vertical direction.
In one embodiment, the S heat exchanger outlet lines 104 are defined in a variety of ways, including but not limited to the following:
in a first mode
The S heat exchanger outlet lines 104 are the first S heat exchanger outlet lines of the N heat exchanger outlet lines 102, which are ordered from high to low.
For example: n is 6, S is 2, and the S heat exchanger outlet pipes 104 are the first 2 heat exchanger outlet pipes in the 6 heat exchanger outlet pipes, which are arranged from small to large in height.
The S heat exchanger outlet lines 104 are the first S heat exchanger outlet lines of the N heat exchanger outlet lines 102 in order from high to low, the refrigerant quantity of the S heat exchanger outlet pipelines with small height is matched with the slower air speed of the S heat exchanger outlet pipelines with small height as much as possible by adjusting the refrigerant quantity of the S heat exchanger outlet pipelines with small height, so that the refrigerant quantity of the S heat exchanger outlet pipelines with small height can be vaporized as much as possible, meanwhile, the refrigerant quantity of the N-S heat exchanger outlet pipelines with large height can be adjusted, the refrigerant quantity of the N-S heat exchanger outlet pipelines with large height is matched with the faster air speed of the N-S heat exchanger outlet pipelines with large height as much as possible, the refrigerant vaporizing capacity of the N-S heat exchanger outlet pipelines with large height can be better exerted, the vaporized refrigerant quantity is more, and the overall heat exchange effect of the heat exchanger can be better improved.
Mode two
The S heat exchanger outlet pipes 104 are the first S heat exchanger outlet pipes in odd number of heat exchanger outlet pipes in the N heat exchanger outlet pipes 102, which are arranged from small to large in height.
For example: n is 6, S is 2, and S heat exchanger outlet lines 104 are the first 2 heat exchanger outlet lines among the 1 st, 3 rd, and 5 th heat exchanger outlet lines of 6 heat exchanger outlet lines in order from high to high, i.e., S heat exchanger outlet lines 104 are the 1 st and 3 rd heat exchanger outlet lines of 6 heat exchanger outlet lines in order from high to high.
The positions of the pressure regulating assemblies in the N heat exchanger outlet pipelines are distributed more uniformly, the pressure regulating assemblies are not positioned in the S heat exchanger outlet pipelines at the bottom, and the pressure regulating effect is more balanced.
Mode III
The S heat exchanger outlet pipelines 104 are the T-th heat exchanger outlet pipeline to the T + S-1 th heat exchanger outlet pipeline in the N heat exchanger outlet pipelines 102, which are arranged from high to low, wherein T is greater than 1, and T is less than N-S + 1.
For example: n is 6, S is 2, T is 2, and the S heat exchanger outlet pipelines 104 are 2 nd to 3 rd heat exchanger outlet pipelines in the 6 heat exchanger outlet pipelines, the heights of which are in sequence from small to large.
The pressure regulating assembly is not located at the lowest part, and the pressure of the refrigerant flowing through the middle part or the high-height outlet pipeline of the heat exchanger can be regulated.
In one embodiment, the pressure regulating assembly 103 includes at least one piece of tubing.
The unit components such as the gas collecting pipe, the four-way valve and the like are connected behind the tubing, the capillary tube is connected in front of the heat exchanger, and the tubing can also be the capillary tube.
There are many ways to determine the piping parameters, including but not limited to the following:
in a first mode
The sum of the length of the piping and the length of any one of the S heat exchanger outlet lines 104 is greater than the length of any one of the N-S heat exchanger outlet lines 105.
By using the piping, the length of any one of the S heat exchanger outlet lines 104 is increased, and the pressure of the refrigerant flowing through the S heat exchanger outlet lines 104 is increased. When the piping is a capillary tube, the longer the length of the capillary tube, the greater the resistance to the refrigerant flowing through the capillary tube, and the smaller the amount of refrigerant flowing through the capillary tube.
Mode two
The pipe diameter of the piping is smaller than that of the outlet pipeline of the heat exchanger.
By reducing the pipe diameter of the piping, the pressure of the refrigerant flowing through the S heat exchanger outlet pipes 104 is increased.
Mode III
The sum of the length of the piping and the length of any one of the S heat exchanger outlet pipes 104 is greater than the length of any one of the N-S heat exchanger outlet pipes 105, and the pipe diameter of the piping is smaller than the pipe diameter of the heat exchanger outlet pipe.
By increasing the length of the piping and reducing the pipe diameter of the piping, the pressure of the refrigerant flowing through the S heat exchanger outlet pipes 104 can be made greater than the pressure of the refrigerant flowing through the N-S heat exchanger outlet pipes 105, increasing the pressure of the refrigerant flowing through the S heat exchanger outlet pipes 104.
In one embodiment, the pressure regulating assembly 103 includes S pieces of tubing;
the input ends of the S pipes are connected with the output ends of the S heat exchanger outlet pipelines 104 in a one-to-one correspondence manner, and the output ends of the S pipes are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 2, as shown in fig. 2, the pressure regulating assembly 103 includes 2 pipes, input ends of the 2 pipes are connected to output ends of the 2 heat exchanger outlet pipelines 104 in a one-to-one correspondence, and output ends of the 2 pipes are connected to output ends of the 4 heat exchanger outlet pipelines 105 and then connected to the refrigerant output pipeline 106. The thick line portion in fig. 2 indicates piping.
The pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is respectively increased through the S pipes, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 can be increased to different degrees through changing the length and/or the pipe diameter of each pipe, and the overall heat exchange effect of the heat exchanger is more flexibly improved.
In one embodiment, the pressure regulating assembly 103 includes M pipes, M being less than S;
l in S heat exchanger outlet lines 104iThe output end of the outlet pipeline of each heat exchanger is connected with the input end of the ith pipe in the M pipes, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure BDA0003084370280000101
the output ends of the M distribution pipes are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L1Can be 1, L2The pressure regulating assembly 103 may include 2 pipes, the output end of 1 heat exchanger outlet pipe in the 4 heat exchanger outlet pipes 104 is connected to the input end of the 1 st pipe in the 2 pipes, the output end of 3 heat exchanger outlet pipes in the 4 heat exchanger outlet pipes 104 is connected to the input end of the 2 nd pipe in the 2 pipes, and the output end of the 2 pipes is connected to the output end of the 2 heat exchanger outlet pipes 105 and then connected to the refrigerant output pipe 106.
For example: n is 6, S is 2, M is 1, as shown in fig. 3, the pressure regulating assembly 103 includes 1 pipe, the output ends of the 2 heat exchanger outlet pipes 104 are connected to the input ends of the pipes, and the output ends of the pipes are connected to the output ends of the 4 heat exchanger outlet pipes 105 to the refrigerant output pipe 106. The pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 is increased by 1 pipe, and the pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 can be increased uniformly by changing the length and/or the pipe diameter of the pipe. The thick line portion in fig. 3 indicates piping.
In one embodiment, the pressure regulating assembly 103 includes S + M pipes, M being less than S;
the input ends of the S pipes are connected with the output ends of the S heat exchanger outlet pipelines 104 in a one-to-one correspondence manner, and L in the S pipesiAfter the output ends of the pipes are connected, the output ends of the pipes are connected with the input end of the ith pipe in M pipes except S pipes in S + M pipes, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure BDA0003084370280000102
the output ends of the M distribution pipes are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L1Can be 1, L2The pressure regulating module 103 may be 3, and includes 6 pipes, input ends of 4 pipes and output ends of 4 heat exchanger outlet pipes 104 are connected in a one-to-one correspondence, an output end of 1 pipe of the 4 pipes is connected to an input end of a 1 st pipe of 2 pipes other than 4 pipes among the 6 pipes, an output end of 3 pipes of the 4 pipes is connected to an input end of a 2 nd pipe of 2 pipes other than 4 pipes among the 6 pipes, and an output end of the 2 pipes is connected to an output end of the 2 heat exchanger outlet pipe 105 and then connected to the refrigerant output pipe 106.
For example: n is 6, S is 2, M is 1, as shown in fig. 4, the pressure regulating assembly 103 includes 3 pipes, input ends of the 2 pipes are connected to output ends of the 2 heat exchanger outlet pipes 104 in a one-to-one correspondence, output ends of the 2 pipes are connected to input ends of 1 pipe other than the 2 pipes among the 3 pipes, and output ends of the 1 pipe are connected to output ends of the 4 heat exchanger outlet pipes 105 to be connected to the refrigerant output pipe 106. The pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is respectively increased through the S pipes, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is uniformly increased through the 1 pipe, two-stage boosting is realized, not only can the boosting be flexibly realized, but also the boosting can be uniformly realized, the boosting mode is controlled to be diversified, the two-stage boosting can be realized, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines can be independently adjusted firstly, the adjustment ground is matched with the capability of vaporizing refrigerant, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is uniformly adjusted, the pressure adjustment ground of the refrigerant flowing through the N-S heat exchanger outlet pipelines is matched with the capability of vaporizing refrigerant, the pressure adjusting effect is better, and the refrigerant quantity distribution is more uniform. The thick line portion in fig. 4 indicates piping.
In one embodiment, the pressure regulating assembly 103 includes at least one controllable valve.
The controllable valve may be a thermal expansion valve or an electronic expansion valve, and the degree of increase in the pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 can be controlled by controlling the opening degree of the controllable valve.
In one embodiment, the pressure regulating assembly 103 includes S controllable valves;
the input ends of the S controllable valves are correspondingly connected with the output ends of the S heat exchanger outlet pipelines 104, and the output ends of the S controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 2, as shown in FIG. 5, the pressure regulating assembly 103 includes 2 controllable valves, the input ends of the 2 controllable valves are connected with the output ends of the 2 heat exchanger outlet pipelines 104 in a one-to-one correspondence manner, and the output ends of the 2 controllable valves are connected with the output ends of the 4 heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
The pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is respectively increased through the S controllable valves, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 can be increased to different degrees by changing the opening degree of each controllable valve, and the overall heat exchange effect of the heat exchanger is more flexibly improved.
In one embodiment, the pressure regulating assembly 103 includes M controllable valves, M being less than S;
l in S heat exchanger outlet lines 104iThe output end of the outlet pipeline of each heat exchanger is connected with M controllable pipelinesThe input end of the ith controllable valve in the valve is connected, wherein i is not less than 1 and i is not more than M, LiNot less than 1 and
Figure BDA0003084370280000121
the output ends of the M controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L1Can be 1, L2Can be 3, pressure regulating subassembly 103 includes 2 controllable valves, the back is connected to the output of 1 heat exchanger outlet pipeline in 4 heat exchanger outlet pipeline 104, with the input of the 1 st controllable valve in 2 controllable valves be connected, the back is connected to the output of 3 heat exchanger outlet pipeline in 4 heat exchanger outlet pipeline 104, with the input of the 2 nd controllable valve in 2 controllable valves be connected, the back is connected to the output of 2 controllable valves and the output of 2 heat exchanger outlet pipeline 105, be connected with refrigerant output pipeline 106.
For example: n is 6, S is 2, M is 1, as shown in fig. 6, the pressure regulating assembly 103 includes 1 controllable valve, the output ends of the 2 heat exchanger outlet pipelines 104 are connected and then connected with the input end of the controllable valve, and the output ends of the controllable valve and the output ends of the 4 heat exchanger outlet pipelines 105 are connected and then connected with the refrigerant output pipeline 106. The pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 is increased by 1 controllable valve, and the pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 can be increased uniformly by changing the opening degree of the controllable valve.
In one embodiment, the pressure regulating assembly 103 includes S + M controllable valves, M being less than S;
the input ends of the S controllable valves are connected with the output ends of the S heat exchanger outlet pipelines 104 in a one-to-one correspondence mode, and L in the S controllable valvesiThe output ends of the controllable valves are connected with the input end of the ith controllable valve in the M controllable valves except the S controllable valves in the S + M controllable valves, wherein i is not less than 1 and i is not more than M, LiNot less than 1 and
Figure BDA0003084370280000131
the output ends of the M controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L1Can be 1, L2And the pressure regulating assembly 103 comprises 6 controllable valves, the input ends of the 4 controllable valves are connected with the output ends of the 4 heat exchanger outlet pipelines 104 in a one-to-one correspondence manner, the input ends of 1 controllable valve in the 4 controllable valves are connected with the input end of the 1 st controllable valve in 2 controllable valves except the 4 controllable valves in the 6 controllable valves after the output ends of 1 controllable valve in the 4 controllable valves are connected, the input end of the 2 nd controllable valve in 2 controllable valves except the 4 controllable valves in the 6 controllable valves is connected after the output ends of 3 controllable valves in the 4 controllable valves are connected, and the output ends of the 2 controllable valves are connected with the output end of the 2 heat exchanger outlet pipelines 105 and then connected with the refrigerant output pipeline 106.
For example: n is 6, S is 2, M is 1, as shown in fig. 7, the pressure regulating assembly 103 includes 3 controllable valves, the input ends of the 2 controllable valves are connected with the output ends of the 2 heat exchanger outlet pipelines 104 in a one-to-one correspondence manner, after the output ends of the 2 controllable valves are connected, the output ends of the 2 controllable valves are connected with the input ends of 1 controllable valve except for the 2 controllable valves in the 3 controllable valves, and after the output ends of the 1 controllable valves and the output ends of the 4 heat exchanger outlet pipelines 105 are connected, the output ends of the 1 controllable valves are connected with the refrigerant output pipeline 106. The pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is respectively increased through the S controllable valves, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines 104 is uniformly increased through the 1 controllable valve, two-stage boosting is realized, not only can the boosting be flexibly realized, but also the boosting can be uniformly realized, the boosting mode is controlled to be diversified, the two-stage boosting can be realized, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines can be independently adjusted firstly, the adjusting ground is matched with the vaporization refrigerant capacity, and the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is uniformly adjusted, so that the pressure of the refrigerant flowing through the N-S heat exchanger outlet pipelines is adjusted ground to be matched with the vaporization refrigerant capacity, the pressure adjusting effect is better, and the refrigerant quantity distribution is more uniform.
In one embodiment, the heat exchanger outlet line is configured with a detection assembly.
The detection component can be a temperature sensing bulb, a temperature sensor or a pressure sensor.
To sum up, the heat exchanger provided by the embodiment of the present application connects the input end of the pressure regulating assembly through the output end of the S heat exchanger outlet pipelines, connects the output ends of the N-S heat exchanger outlet pipelines and the output end of the pressure regulating assembly, and then connects the output ends of the N-S heat exchanger outlet pipelines and the output end of the pressure regulating assembly with the refrigerant output pipeline, and the pressure regulating assembly is used for adjusting the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines. In the prior art, for a vertical heat exchanger, along with the heightening of the heat exchanger, the refrigerant quantity distribution of pipelines with different heights of the heat exchanger is more and more obviously influenced by gravity, the refrigerant quantity of the pipeline with the small height of the heat exchanger is more, and the refrigerant quantity of the pipeline with the large height of the heat exchanger is less. According to the technical scheme, the output end of the S heat exchanger outlet pipelines is connected with the input end of the pressure regulating assembly, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is adjusted, the refrigerant quantity flowing through the S heat exchanger outlet pipelines and the refrigerant quantity flowing through the N-S heat exchanger outlet pipelines are adjusted, the refrigerant quantity flowing through the S heat exchanger outlet pipelines and the refrigerant quantity flowing through the N-S heat exchanger outlet pipelines can be vaporized as much as possible, and therefore the overall heat exchange effect of the heat exchanger is improved. The problem of receive the influence of gravity, the refrigerant volume of heat exchanger different height pipelines distributes unreasonablely is solved.
Based on the same concept, an embodiment of the present application provides a method for controlling a refrigerant flow rate of a heat exchanger, where the method is applied to a heat exchanger mentioned in the above embodiment, and repeated parts are not repeated, and as shown in fig. 8, the method mainly includes:
step 801, detecting a refrigerant flow characterization parameter of a heat exchanger.
The refrigerant flow characterization parameters are used for characterizing the refrigerant flow of each heat exchanger outlet pipeline flowing through the heat exchanger.
And 802, adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter.
In one embodiment, the refrigerant flow characterizing parameter includes one of an outdoor ambient temperature, a compressor operating frequency and an evaporating pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, the refrigerant flow of the pressure regulating subassembly of adjusting flowing through includes:
and if the outdoor environment temperature is lower than the preset environment temperature value, or the operation frequency of the compressor is lower than the preset operation frequency value, or the evaporation pressure is lower than the preset evaporation pressure value, the opening degree of the controllable valve is increased.
The controllable valve may be a thermostatic expansion valve or an electronic expansion valve, and the rising degree of the pressure of the refrigerant flowing through each of the outlet pipelines of the S heat exchangers can be controlled by adjusting the opening degree of the controllable valve. The evaporation pressure is a pressure value collected by a pressure sensor on the suction side of the compressor. The preset ambient temperature value, the preset operation frequency value and the preset evaporation pressure value can be empirical values or numerical values obtained after a plurality of tests.
When the outdoor environment temperature is lower than the preset environment temperature value, or the operation frequency of the compressor is lower than the preset operation frequency value, or the evaporation pressure is lower than the preset evaporation pressure value, the refrigerant circulation quantity passing through the heat exchanger is small, the opening degree of the controllable valve is increased, and the refrigerant circulation quantity can be adjusted to be in a proper and reasonable state.
In one embodiment, the refrigerant flow characterizing parameter includes one of an outdoor ambient temperature, a compressor operating frequency and an evaporating pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, the refrigerant flow of the pressure regulating subassembly of adjusting flowing through includes:
and if the outdoor environment temperature is higher than the preset environment temperature value, or the operation frequency of the compressor is higher than the preset operation frequency value, or the evaporation pressure is higher than the preset evaporation pressure value, the opening degree of the controllable valve is reduced.
When the outdoor environment temperature is higher than the preset environment temperature value, or the operation frequency of the compressor is higher than the preset operation frequency value, or the evaporation pressure is higher than the preset evaporation pressure value, the refrigerant circulation quantity passing through the heat exchanger is large, the opening degree of the controllable valve is reduced, and the refrigerant circulation quantity can be adjusted to be in a proper and reasonable state. The opening degree of the controllable valve can be adjusted according to the opening degree adjustment value of the controllable valve corresponding to the interval where the difference value between the preset environment temperature value and the outdoor environment temperature is located, or according to the opening degree adjustment value of the controllable valve corresponding to the interval where the difference value between the preset operation frequency value and the operation frequency of the compressor is located, or according to the opening degree adjustment value of the controllable valve corresponding to the interval where the difference value between the evaporation pressure and the preset evaporation pressure value is located. In a specific embodiment, the refrigerant flow characterization parameter comprises one of superheat degree, temperature and pressure of any one of the outlet pipelines of the N-S heat exchangers; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, the refrigerant flow of the pressure regulating subassembly of adjusting flowing through includes:
and if the superheat degree of any one of the outlet pipelines of the N-S heat exchangers is greater than a preset superheat value, or the temperature is greater than a preset pipeline temperature value, or the pressure is greater than a preset pipeline pressure value, reducing the opening degree of the controllable valve.
The preset superheat value, the preset pipeline temperature value and the preset pipeline pressure value can be empirical values or numerical values obtained after multiple tests.
When the superheat degree of any one of the outlet pipelines of the N-S heat exchangers is larger than a preset superheat degree value, or the temperature is larger than a preset pipeline temperature value, or the pressure is larger than a preset pipeline pressure value, the pressure of the refrigerant flowing through the outlet pipelines of the N-S heat exchangers is larger, the amount of the refrigerant flowing through the outlet pipelines of the N-S heat exchangers is less, the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers is increased by reducing the opening degree of the controllable valve, more refrigerant flows into the outlet pipelines of the N-S heat exchangers, the amount of the refrigerant flowing through the outlet pipelines of the N-S heat exchangers is increased, and the overall heat exchange effect of the heat exchangers is improved.
The opening degree of the controllable valve can be adjusted according to the opening degree adjusting value of the controllable valve corresponding to the interval where the difference value of the superheat degree and the preset superheat degree is located, or according to the opening degree adjusting value of the controllable valve corresponding to the interval where the difference value of the temperature and the preset pipeline temperature value is located, or according to the opening degree adjusting value of the controllable valve corresponding to the interval where the difference value of the pressure and the preset pipeline pressure value is located.
Based on the same concept, an embodiment of the present application provides a method for controlling a refrigerant flow rate of a heat exchanger, where the method is applied to a heat exchanger mentioned in the above embodiment, and repeated parts are not repeated, and as shown in fig. 9, the method mainly includes:
and step 901, detecting the frosting state characterization parameters of the heat exchanger.
The frosting state characterization parameters are used for characterizing the frosting state of each heat exchanger outlet pipeline of the heat exchanger.
And step 902, adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the frosting state characterization parameter.
In one embodiment, the frost formation condition indicative parameter comprises a temperature of a heat exchanger outlet line to which the controllable valve is connected; the pressure regulating assembly comprises at least one controllable valve;
according to frosting state characterization parameter, the refrigerant flow of pressure regulating subassembly is flowed through in the adjustment includes:
if the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is lower than the preset frosting temperature, the opening degree of the controllable valve is reduced;
and if the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is higher than the preset frosting temperature, the opening degree of the controllable valve is increased.
The preset frosting temperature can be an empirical value or a numerical value obtained after a plurality of tests.
When the temperature of the heat exchanger outlet pipeline connected with the controllable valve is lower than the preset frosting temperature, the heat exchanger outlet pipeline connected with the controllable valve has a frosting trend, the pressure of a refrigerant flowing through the heat exchanger outlet pipeline connected with the controllable valve is improved by reducing the opening degree of the controllable valve, the flow of the refrigerant flowing through the heat exchanger outlet pipeline connected with the controllable valve is reduced, the temperature of the heat exchanger outlet pipeline connected with the controllable valve is increased, and the frosting trend of the heat exchanger outlet pipeline connected with the controllable valve can be delayed.
In a specific embodiment, the frosting condition characterization parameter comprises the temperature of any one of the outlet pipelines of the N-S heat exchangers; the pressure regulating assembly comprises at least one controllable valve;
according to frosting state characterization parameter, the refrigerant flow of pressure regulating subassembly is flowed through in the adjustment includes:
if the temperature of any one heat exchanger outlet pipeline in the N-S heat exchanger outlet pipelines is lower than the preset frosting temperature, the opening degree of the controllable valve is increased;
if the temperature of any one heat exchanger outlet pipeline in the N-S heat exchanger outlet pipelines is higher than the preset frosting temperature, the opening degree of the controllable valve is reduced;
when the temperature of any one of the outlet pipelines of the N-S heat exchangers is lower than the preset frosting temperature, the outlet pipelines of the N-S heat exchangers have a frosting tendency, the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers is reduced by increasing the opening degree of the controllable valve, the refrigerant is enabled to flow into the outlet pipelines of the S heat exchangers more, the pressure of the refrigerant flowing through the outlet pipelines of the N-S heat exchangers is increased, the flow of the refrigerant flowing through the outlet pipelines of the N-S heat exchangers is reduced, the temperature of the outlet pipelines of the N-S heat exchangers is increased, and the frosting tendency of the outlet pipelines of the N-S heat exchangers can be delayed.
Based on the same concept, the embodiment of the application provides an air conditioner, which comprises: the heat exchanger mentioned in the above embodiments, and the fan;
the fan is positioned above the heat exchanger.
The repetition is not described in detail.
The fan is located the top of heat exchanger, and the distance between the heat exchanger pipeline that highly is little and the fan is far away, and the wind speed of highly little heat exchanger pipeline is slow, and the refrigerant volume that can vaporize is few, and the distance between highly big heat exchanger pipeline and the fan is close, and the wind speed of highly big heat exchanger pipeline is fast, and the refrigerant volume that can vaporize is many.
The heat exchanger that this application embodiment provided connects the input of pressure regulating subassembly through the output at S heat exchanger outlet pipeline, is connected the back with the output of N-S heat exchanger outlet pipeline and the output of pressure regulating subassembly, is connected with refrigerant output pipeline, and the pressure regulating subassembly for the pressure of the refrigerant of S heat exchanger outlet pipeline of rising flow through. The fan is positioned above the heat exchanger, the refrigerant quantity of the heat exchanger flow path with small height is large, but the air speed of the heat exchanger flow path with small height is slow, and the refrigerant quantity capable of being vaporized is small; and the fan is positioned above the heat exchanger, the refrigerant quantity of the high heat exchanger flow path is less, but the air speed of the high heat exchanger flow path is high, and the refrigerant quantity capable of being vaporized is large.
It is noted that, in this document, 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 necessarily 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, article, 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, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (18)

1. A heat exchanger, comprising: the heat exchanger comprises a heat exchanger body, a heat exchanger outlet pipeline and a pressure regulating assembly;
the heat exchanger body is connected with input ends of N heat exchanger outlet pipelines, output ends of S heat exchanger outlet pipelines are connected with input ends of the pressure regulating assembly, and output ends of N-S heat exchanger outlet pipelines except the S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines are connected with output ends of the pressure regulating assembly and then connected with a refrigerant output pipeline, wherein N is larger than 1, S is smaller than or equal to N, S is not smaller than 1, and the N heat exchanger outlet pipelines are different in height;
and the pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers.
2. The heat exchanger of claim 1, wherein the S heat exchanger outlet lines are the first S heat exchanger outlet lines of the N heat exchanger outlet lines in descending order of height.
3. The heat exchanger of claim 2, wherein the pressure regulating assembly comprises at least one piece of tubing;
the sum of the length of the distribution pipe and the length of any one of the S heat exchanger outlet pipelines is larger than the length of any one of the N-S heat exchanger outlet pipelines, and/or the pipe diameter of the distribution pipe is smaller than the pipe diameter of the heat exchanger outlet pipeline.
4. The heat exchanger of claim 3, wherein the pressure regulating assembly comprises S pieces of tubing;
the input ends of the S distribution pipes are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and the output ends of the S distribution pipes are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
5. The heat exchanger of claim 3, wherein the pressure regulating assembly comprises M piping, M being less than S;
l in outlet pipelines of the S heat exchangersiAfter the output end of the outlet pipeline of each heat exchanger is connected, the outlet pipeline of each heat exchanger is connected with the input end of the ith pipeline in the M pipelines, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure FDA0003084370270000021
and the output ends of the M distribution pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
6. The heat exchanger of claim 3, wherein the pressure regulating assembly comprises S + M piping, M being less than S;
the input ends of S distribution pipes are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and L in the S distribution pipesiAfter the output ends of the pipes are connected, the output ends of the pipes are connected with the input end of the ith pipe in M pipes except the S pipes in the S + M pipes, wherein i is not less than 1 and not more than M, LiNot less than 1 and
Figure FDA0003084370270000022
and the output ends of the M distribution pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
7. A heat exchanger according to claim 1 or 2, wherein the pressure regulating assembly comprises at least one controllable valve.
8. The heat exchanger of claim 7, wherein the pressure regulating assembly comprises S controllable valves;
the input ends of the S controllable valves are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and the output ends of the S controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
9. The heat exchanger of claim 7, wherein the pressure regulating assembly comprises M controllable valves, M being less than S;
l in outlet pipelines of the S heat exchangersiThe output end of the outlet pipeline of each heat exchanger is connected with the input end of the ith controllable valve in the M controllable valves, wherein i is not less than 1 and i is not more than M, LiNot less than 1 and
Figure FDA0003084370270000023
and the output ends of the M controllable valves are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipeline.
10. The heat exchanger of claim 7, wherein the pressure regulating assembly comprises S + M controllable valves, M being less than S;
the input ends of the S controllable valves are connected with the output ends of the S heat exchanger outlet pipelines in a one-to-one correspondence mode, and L in the S controllable valvesiAfter the output ends of the controllable valves are connected, the output ends of the controllable valves are connected with the input end of the ith controllable valve in the M controllable valves except the S controllable valves in the S + M controllable valves, wherein i is not less than 1 and is not more than M, LiNot less than 1 and
Figure FDA0003084370270000031
the output ends of the M controllable valves are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerantThe output pipeline is connected.
11. The method for controlling the flow of the refrigerant of the heat exchanger is applied to the heat exchanger of claim 1, and comprises the following steps of:
detecting a refrigerant flow characterization parameter of the heat exchanger;
and adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter.
12. The heat exchanger refrigerant flow control method according to claim 11, wherein the refrigerant flow characterization parameter includes one of outdoor ambient temperature, compressor operating frequency and evaporating pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the outdoor environment temperature is lower than a preset environment temperature value, or the operation frequency of the compressor is lower than a preset operation frequency value, or the evaporation pressure is lower than a preset evaporation pressure value, the opening degree of the controllable valve is increased.
13. The heat exchanger refrigerant flow control method according to claim 11, wherein the refrigerant flow characterization parameter includes one of outdoor ambient temperature, compressor operating frequency and evaporating pressure; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the outdoor environment temperature is greater than a preset environment temperature value, or the operation frequency of the compressor is greater than a preset operation frequency value, or the evaporation pressure is greater than a preset evaporation pressure value, the opening degree of the controllable valve is reduced.
14. The heat exchanger refrigerant flow control method according to claim 11, wherein the refrigerant flow characterization parameter includes one of a superheat degree, a temperature and a pressure of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly comprises at least one controllable valve;
according to refrigerant flow characterization parameter, adjust the refrigerant flow that flows through the pressure regulating subassembly, include:
and if the superheat degree of any one of the outlet pipelines of the N-S heat exchangers is greater than a preset superheat value, or the temperature is greater than a preset pipeline temperature value, or the pressure is greater than a preset pipeline pressure value, reducing the opening degree of the controllable valve.
15. The method for controlling the flow of the refrigerant of the heat exchanger is applied to the heat exchanger of claim 1, and comprises the following steps of:
detecting a frosting state characterization parameter of the heat exchanger;
and adjusting the flow of the refrigerant flowing through the pressure regulating assembly according to the frosting state characterization parameter.
16. The heat exchanger refrigerant flow control method according to claim 15, wherein the frosting state characterization parameter includes a temperature of the heat exchanger outlet pipe connected to the controllable valve; the pressure regulating assembly comprises at least one controllable valve;
according to the frosting state characterization parameter, the refrigerant flow passing through the pressure regulating assembly is adjusted, and the method comprises the following steps:
if the temperature of the heat exchanger outlet pipeline connected with the controllable valve is lower than the preset frosting temperature, the opening degree of the controllable valve is reduced;
and if the temperature of the heat exchanger outlet pipeline connected with the controllable valve is higher than the preset frosting temperature, the opening degree of the controllable valve is increased.
17. The heat exchanger refrigerant flow control method according to claim 15, wherein the frosting state characterization parameter includes a temperature of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly comprises at least one controllable valve;
according to the frosting state characterization parameter, the refrigerant flow passing through the pressure regulating assembly is adjusted, and the method comprises the following steps:
if the temperature of any one of the outlet pipelines of the N-S heat exchangers is lower than the preset frosting temperature, the opening degree of the controllable valve is increased;
and if the temperature of any one of the outlet pipelines of the N-S heat exchangers is higher than the preset frosting temperature, the opening degree of the controllable valve is reduced.
18. An air conditioner, comprising: the heat exchanger of any one of claims 1 to 10, and a fan;
the fan is positioned above the heat exchanger.
CN202110575956.4A 2021-05-26 2021-05-26 Air conditioner, heat exchanger and heat exchanger refrigerant flow control method Pending CN113251650A (en)

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