CN113251650B - 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
CN113251650B
CN113251650B CN202110575956.4A CN202110575956A CN113251650B CN 113251650 B CN113251650 B CN 113251650B CN 202110575956 A CN202110575956 A CN 202110575956A CN 113251650 B CN113251650 B CN 113251650B
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China
Prior art keywords
heat exchanger
pressure regulating
refrigerant
outlet pipelines
output ends
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CN202110575956.4A
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CN113251650A (en
Inventor
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/CN113251650B/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)
  • Compression-Type Refrigeration Machines With Reversible Cycles (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. The 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 ends of the pressure regulating assembly, the output ends of N-S heat exchanger outlet pipelines except for the S heat exchanger outlet pipelines in the N heat exchanger outlet pipelines are connected with the output ends of the pressure regulating assembly and then are connected with the refrigerant output pipelines, wherein N is greater than 1, S is less than or equal to N, S is not less 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. The application is used for solving the problem that the refrigerant quantity distribution of pipelines with different heights of the heat exchanger is unreasonable under the influence of gravity.

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 heat exchanger refrigerant flow control method.
Background
At present, the design capacity of a single system of an air-cooled heat pump unit is larger and larger, and the design of a heat exchanger is also larger and larger, and the height is higher and higher.
For the vertical heat exchanger, as the heat exchanger is heightened, the distribution of the refrigerant quantity of pipelines with different heights of the heat exchanger is 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. Especially for top-down type unit, the fan is at the top of unit, and the distance between high little heat exchanger pipeline and the fan is long, and the wind speed of high little heat exchanger pipeline is slow, and the refrigerant volume that can vaporize is little, and the distance between high heat exchanger pipeline and the fan is near, and the wind speed of high heat exchanger pipeline is fast, and the refrigerant volume that can vaporize is big.
The refrigerant quantity, the heat exchange efficiency and the like 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 whole energy efficiency is low, and the problems of frequent frosting and defrosting of unit heating, poor heating effect and the like occur under severe conditions.
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 the refrigerant flow distribution of pipelines with different heights of the heat exchanger is unreasonable under 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 the input ends of N heat exchanger outlet pipelines, the output ends of S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating assembly, the output ends of N-S heat exchanger outlet pipelines except the S heat exchanger outlet pipelines are connected with the output ends of the pressure regulating assembly and then connected with the refrigerant output pipelines, wherein N is greater than 1, S is less than or equal to N, S is not less 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.
Optionally, the S heat exchanger outlet pipes are the first S heat exchanger outlet pipes of the N heat exchanger outlet pipes with the heights ordered from small to large.
Optionally, the pressure regulating assembly comprises at least one tubing;
The sum of the length of the piping and the length of any one of the S heat exchanger outlet pipelines is greater than the length of any one of the N-S heat exchanger outlet pipelines, and/or the pipe diameter of the piping is smaller than the pipe diameter of the heat exchanger outlet pipeline.
Optionally, the pressure regulating assembly comprises S tubing;
the input ends of the S pipes are connected with the output ends of the outlet pipelines of the S heat exchangers in a one-to-one correspondence mode, and the output ends of the S pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipelines.
Optionally, the pressure regulating assembly comprises M tubing, M being less than S;
the output ends of L i heat exchanger outlet pipelines in the S heat exchanger outlet pipelines are 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, and L i is not less than 1 and The output ends of the M 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 s+m piping, M being less than S;
The input ends of S pipes are connected with the output ends of the outlet pipelines of the S heat exchangers in a one-to-one correspondence manner, and the output ends of L i pipes in the S pipes are connected with the input ends of the ith pipe in M pipes except the S pipes in the S+M pipes, wherein i is not less than 1 and i is not more than M, and L i is not less than 1 and The output ends of the M 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 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 outlet pipelines of the S heat exchangers in a one-to-one correspondence manner, and the output ends of the S 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 pipelines.
Optionally, the pressure regulating assembly includes M controllable valves, M being less than S;
the output ends of L i heat exchanger outlet pipelines in the S heat exchanger outlet pipelines are connected with the input end of the ith controllable valve in the M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and The output ends of the M 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 includes s+m controllable valves, M being less than S;
The input ends of S controllable valves are connected with the output ends of the outlet pipelines of S heat exchangers in one-to-one correspondence, and after the output ends of L i controllable valves in the S controllable valves are connected, the S controllable valves are connected with the input end of the ith controllable valve in M controllable valves except the S controllable valves in the S+M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and not more than 1 The output ends of the M controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
In a second aspect, an embodiment of the present application provides a method for controlling a refrigerant flow rate of a heat exchanger, which is applied to the heat exchanger in the first aspect, including:
detecting a refrigerant flow characterization parameter of the heat exchanger;
and adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter.
Optionally, the refrigerant flow characterization parameter includes one of outdoor ambient temperature, compressor operating frequency, and evaporating pressure; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
And if the outdoor environment temperature is smaller than a preset environment temperature value, or the compressor operating frequency is smaller than a preset operating frequency value, or the evaporating pressure is smaller than a preset evaporating pressure value, opening of the controllable valve is regulated.
Optionally, the refrigerant flow characterization parameter includes one of outdoor ambient temperature, compressor operating frequency, and evaporating pressure; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
and if the outdoor environment temperature is greater than a preset environment temperature value, or the compressor operating frequency is greater than a preset operating frequency value, or the evaporating pressure is greater than a preset evaporating pressure value, reducing the opening of the controllable valve.
Optionally, the refrigerant flow characterization parameter includes one of superheat, temperature and pressure of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
And if the superheat degree of any one of the N-S heat exchanger outlet pipelines 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, reducing the opening of the controllable valve.
In a third aspect, an embodiment of the present application provides a method for controlling a refrigerant flow rate of a heat exchanger, which is applied to the heat exchanger in the first aspect, including:
detecting a frosting state characterization parameter of the heat exchanger;
And adjusting the flow of the refrigerant flowing through the pressure regulating component according to the characterization parameter of the frosting state.
Optionally, the frosting status characterization parameter comprises a temperature of the heat exchanger outlet line to which the controllable valve is connected; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating component according to the frosting state characterization parameter comprises the following steps:
If the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is smaller than the preset frosting temperature, the opening 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 regulated.
Optionally, the frosting state characterization parameter includes a temperature of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating component according to the frosting state characterization parameter comprises the following steps:
If the temperature of any one of the outlet pipelines of the N-S heat exchangers is smaller than the preset frosting temperature, opening 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, reducing the opening of the controllable valve.
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 located above the heat exchanger.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: according to the heat exchanger provided by the embodiment of the application, the output ends of the S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating assembly, the output ends of the N-S heat exchanger outlet pipelines are connected with the output ends of the pressure regulating assembly, then the output ends of the pressure regulating assembly are connected with the refrigerant output pipelines, and the pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines. In the prior art, for a vertical heat exchanger, as the heat exchanger is heightened, the distribution of the refrigerant quantity of pipelines with different heights of the heat exchanger is 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. According to the technical scheme, the output ends of the S heat exchanger outlet pipelines are connected with the input end of the pressure regulating assembly, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is regulated, and then the quantity of the refrigerant flowing through the S heat exchanger outlet pipelines and the quantity of the refrigerant flowing through the N-S heat exchanger outlet pipelines are regulated, so that the quantity of the refrigerant flowing through the S heat exchanger outlet pipelines and the quantity of the refrigerant flowing through the N-S heat exchanger outlet pipelines can be vaporized as much as possible, and the integral heat exchange effect of the heat exchanger is improved. The problem of influenced by gravity, the refrigerant volume distribution of the different high pipelines of heat exchanger is unreasonable 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 invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 2 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 3 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 4 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 5 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 6 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 7 is a schematic view of a heat exchanger according to an embodiment of the present application;
FIG. 8 is a flow chart of a method for controlling the refrigerant flow of a heat exchanger according to an embodiment of the present application;
Fig. 9 is a flow chart of another method for controlling the refrigerant flow rate of the heat exchanger according to the embodiment of the application.
Reference numerals illustrate: 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 pipeline.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the embodiment of the present application, as shown in fig. 1, the heat exchanger mainly includes:
A heat exchanger body 101, a heat exchanger outlet line and a pressure regulating assembly 103;
The heat exchanger body 101 is connected with the input ends of N heat exchanger outlet pipelines 102, the output ends of S heat exchanger outlet pipelines 104 are connected with the input ends of the pressure regulating assembly 103, the 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 the output ends of the pressure regulating assembly 103 and then are connected with a refrigerant output pipeline 106, wherein N is greater than 1, S is less than or equal to N, S is not less than 1, and the 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 S heat exchanger outlet pipelines 104.
The refrigerant output pipeline 106 is used for summarizing the refrigerants output by the N-S heat exchanger outlet pipelines 105 and the pressure regulating assembly 103, and outputting the refrigerants from the heat exchangers.
Where the height refers to the height of the N heat exchanger outlet lines 102 in the vertical direction.
In one embodiment, the S heat exchanger outlet lines 104 are defined in a number of ways, including but not limited to the following:
Mode one
The S heat exchanger outlet lines 104 are the first S heat exchanger outlet lines of the N heat exchanger outlet lines 102 that are ordered from small to large in height.
For example: n is 6, S is 2, S heat exchanger outlet lines 104 are the first 2 heat exchanger outlet lines of the 6 heat exchanger outlet lines with the height ordered from small to large.
The S heat exchanger outlet pipes 104 are the first S heat exchanger outlet pipes with the small height from the small height to the large height in the N heat exchanger outlet pipes 102, the refrigerant quantity of the S heat exchanger outlet pipes with the small height is adjusted to match as slow as possible with the wind speed of the S heat exchanger outlet pipes with the small height, the refrigerant quantity of the S heat exchanger outlet pipes with the small height can be vaporized as much as possible, meanwhile, the refrigerant quantity of the N-S heat exchanger outlet pipes with the large height can be adjusted, the refrigerant quantity of the N-S heat exchanger outlet pipes with the large height is matched with the wind speed of the N-S heat exchanger outlet pipes with the large height as fast as possible, the vaporization refrigerant capacity of the N-S heat exchanger outlet pipes with the large height can be better played, the vaporization refrigerant quantity is more, and the whole heat exchange effect of the heat exchanger can be better promoted.
Mode two
The S heat exchanger outlet lines 104 are the first S heat exchanger outlet lines of the odd number of the N heat exchanger outlet lines 102, which are ordered from small to large in height.
For example: n is 6, S is 2, S heat exchanger outlet lines 104 are the first 2 heat exchanger outlet lines of the 1 st, 3 rd and 5 th heat exchanger outlet lines of the 6 heat exchanger outlet lines with the heights ordered from small to large, namely S heat exchanger outlet lines 104 are the 1 st and 3 rd heat exchanger outlet lines of the 6 heat exchanger outlet lines with the heights ordered from small to large.
The positions of the pressure regulating components in the outlet pipelines of the N heat exchangers can be distributed more uniformly, so that the pressure regulating components are not located in the outlet pipelines of the S heat exchangers at the lowest position, and the pressure regulating effect can be more balanced.
Mode three
The S heat exchanger outlet lines 104 are from the T heat exchanger outlet line to the T+S-1 heat exchanger outlet line in the order from the small height to the large height in the N heat exchanger outlet lines 102, 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, S heat exchanger outlet lines 104 are the 2 nd to 3 rd heat exchanger outlet lines of the 6 heat exchanger outlet lines with the heights ordered 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 tubing.
The piping is connected with the components of the gas collecting tube, the four-way valve and the like, and the capillary tube is connected with the front of the heat exchanger, and the piping can also be a capillary tube.
There are various ways of determining the piping parameters, including but not limited to the following:
Mode one
The sum of the length of the tubing 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 piping, the length of any one of the S heat exchanger outlet pipes 104 is increased, and the pressure of the refrigerant flowing through the S heat exchanger outlet pipes 104 is increased. When the piping is used as a capillary tube, the longer the capillary tube length is, the greater the resistance of the refrigerant flowing through the capillary tube is, and the smaller the amount of refrigerant flowing through the capillary tube is.
Mode two
The pipe diameter of the piping is smaller than the pipe diameter of the outlet pipeline of the heat exchanger.
By reducing the pipe diameter, the pressure of the refrigerant flowing through the S heat exchanger outlet lines 104 is increased.
Mode three
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 pipes.
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, and the pressure of the refrigerant flowing through the S heat exchanger outlet pipes 104 is increased.
In one embodiment, the pressure regulating assembly 103 includes S tubing;
The input ends of the S pipes are connected to the output ends of the S heat exchanger outlet pipes 104 in one-to-one correspondence, and the output ends of the S pipes are connected to the output ends of the N-S heat exchanger outlet pipes 105 and then connected to the refrigerant output pipe 106.
For example: as shown in fig. 2, the pressure regulating unit 103 includes 2 pipes, the input ends of the 2 pipes are connected to the output ends of the 2 heat exchanger outlet pipes 104 in one-to-one correspondence, and the output ends of the 2 pipes are connected to the output ends of the 4 heat exchanger outlet pipes 105 and then connected to the refrigerant output pipe 106. The thick line in fig. 2 shows piping.
The pressure of the refrigerant flowing through each of the S heat exchanger outlet pipelines 104 is respectively increased through the S pipes, and the pressure of the refrigerant flowing through each of the S heat exchanger outlet pipelines 104 can be increased to different degrees by changing the length and/or the pipe diameter of each pipe, so that the overall heat exchange effect of the heat exchanger is more flexibly improved.
In one embodiment, the pressure regulating assembly 103 includes M tubing, M being less than S;
The output ends of L i heat exchanger outlet pipes in the S heat exchanger outlet pipes 104 are connected and then 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, and L i is not less than 1 and The output ends of the M pipes are connected to the output ends of the N-S heat exchanger outlet pipes 105, and then connected to the refrigerant output pipe 106.
For example: n is 6, S is 4, M can be 1,2 or 3. When M is 2, L 1 may be 1, L 2 may be 3, and the pressure regulating unit 103 includes 2 pipes, and after the output ends of 1 heat exchanger outlet pipe among the 4 heat exchanger outlet pipes 104 are connected, the output ends of 3 heat exchanger outlet pipes among the 4 heat exchanger outlet pipes 104 are connected to the input ends of 2 pipes among the 2 pipes, and after the output ends of 2 pipes and the output ends of 2 heat exchanger outlet pipes 105 are connected, the pressure regulating unit is connected to the refrigerant output pipe 106.
For example: as shown in fig. 3, the pressure regulating unit 103 includes 1 pipe, the output ends of the 2 heat exchanger outlet pipes 104 are connected to the input ends of the pipe, and the output ends of the pipe are connected to the output ends of the 4 heat exchanger outlet pipes 105 and the refrigerant output pipe 106. By increasing the pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 by 1 pipe, the pressure of the refrigerant in each of the S heat exchanger outlet lines 104 can be uniformly increased by changing the length and/or pipe diameter of this pipe. The thick line in fig. 3 shows piping.
In one embodiment, the pressure regulating assembly 103 includes s+m tubing, M being less than S;
the input ends of S pipes are connected to the output ends of S heat exchanger outlet pipes 104 in a one-to-one correspondence manner, and the output ends of L i pipes among S pipes are connected to the input end of the i-th pipe among M pipes other than S pipes among S+M pipes, wherein i is not less than 1 and i is not more than M, and L i is not less than 1 and The output ends of the M pipes are connected to the output ends of the N-S heat exchanger outlet pipes 105, and then connected to the refrigerant output pipe 106.
For example: n is 6, S is 4, M can be 1,2 or 3. When M is 2, L 1 may be 1, L 2 may be 3, the pressure regulating unit 103 includes 6 pipes, the input ends of the 4 pipes and the output ends of the 4 heat exchanger outlet pipes 104 are connected in one-to-one correspondence, the output end of 1 pipe of the 4 pipes is connected to the input end of 1 pipe of 2 pipes other than the 4 pipes of the 6 pipes, the output end of 3 pipes of the 4 pipes is connected to the input end of 2 pipes other than the 4 pipes of the 6 pipes, and the output end of 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: as shown in fig. 4, the pressure regulating unit 103 includes 3 pipes, the input ends of the 2 pipes are connected to the output ends of the 2 heat exchanger outlet pipes 104 in one-to-one correspondence, the output ends of the 2 pipes are connected to the input ends of 1 pipe other than the 2 pipes out of the 3 pipes, and the output ends of the 1 pipe and the output ends of the 4 heat exchanger outlet pipes 105 are 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 pressure increase is realized, flexible pressure increase and uniform pressure increase can be realized, the pressure increase is controlled in various manners, the two-stage pressure increase 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 and adjusted to match with the vaporization refrigerant capacity, and then the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is uniformly adjusted to match with the vaporization refrigerant capacity, so that the pressure regulating effect is better, and the refrigerant quantity distribution is more uniform. The thick line in fig. 4 shows 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 by controlling the opening degree of the controllable valve, the degree of pressure rise of the refrigerant flowing through each of the S heat exchanger outlet lines 104 can be controlled.
In one embodiment, the pressure regulating assembly 103 includes S controllable valves;
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 manner, 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 are connected with the refrigerant output pipeline 106.
For example: and N is 6, s is 2, as shown in fig. 5, the pressure regulating assembly 103 comprises 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 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, and 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, so that 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;
The output ends of L i heat exchanger outlet pipelines in the S heat exchanger outlet pipelines 104 are connected with the input end of the ith controllable valve in the M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and 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 a refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L 1 may be 1, L 2 may be 3, and the pressure regulating assembly 103 includes 2 controllable valves, and after the output end of 1 heat exchanger outlet pipeline in 4 heat exchanger outlet pipelines 104 is connected, the output end of 3 heat exchanger outlet pipelines in 4 heat exchanger outlet pipelines 104 is connected, and after the output end of 2 controllable valves in 2 heat exchanger outlet pipelines is connected, the output end of 2 controllable valves and the output end of 2 heat exchanger outlet pipelines 105 are connected, the output end of 2 controllable valves is connected with the refrigerant output pipeline 106.
For example: as shown in fig. 6, the pressure regulating assembly 103 includes 1 controllable valve, the output ends of the 2 heat exchanger outlet pipes 104 are connected to the input ends of the controllable valve, and the output ends of the controllable valve and the output ends of the 4 heat exchanger outlet pipes 105 are connected to the refrigerant output pipe 106. The pressure of the refrigerant flowing through each of the S heat exchanger outlet lines 104 is raised by 1 controllable valve, and the pressure of the refrigerant in each of the S heat exchanger outlet lines 104 can be uniformly raised by changing the opening of this 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 manner, and after the output ends of the L i controllable valves in the S controllable valves are connected, the S controllable valves are connected with the input end of the ith controllable valve in M controllable valves except the S controllable valves in the S+M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and 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 a refrigerant output pipeline 106.
For example: n is 6, S is 4, M can be 1, 2 or 3. When M is 2, L 1 may be 1, L 2 may be 3, the pressure regulating assembly 103 includes 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, the output ends of the 1 st controllable valve of the 4 controllable valves are connected with the input ends of the 1 st controllable valve of the 2 controllable valves except the 4 controllable valves of the 6 controllable valves, the output ends of the 3 controllable valves of the 4 controllable valves are connected with the input ends of the 2 nd controllable valves of the 2 controllable valves except the 4 controllable valves of the 6 controllable valves, and the output ends of the 2 controllable valves are connected with the output ends 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 comprises 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, the output ends of the 2 controllable valves are connected and then connected with the input ends of 1 controllable valve except for the 2 controllable valves in the 3 controllable valves, and the output ends of the 1 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 is uniformly increased through the 1 controllable valves, two-stage pressure increase is achieved, flexible pressure increase and uniform pressure increase can be achieved, the pressure increasing mode is controlled to be diversified, the pressure of the refrigerant flowing through each heat exchanger outlet pipeline in the S heat exchanger outlet pipelines can be independently adjusted, the adjusted pressure is matched with the vaporization refrigerant capacity, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is uniformly adjusted, the pressure of the refrigerant flowing through the N-S heat exchanger outlet pipelines is 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.
In summary, in the heat exchanger provided by the embodiment of the application, the output ends of the outlet pipelines of the S heat exchangers are connected with the input end of the pressure regulating assembly, the output ends of the outlet pipelines of the N-S heat exchangers are connected with the output end of the pressure regulating assembly, then the output ends of the pressure regulating assembly are connected with the refrigerant output pipelines, and the pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers. In the prior art, for a vertical heat exchanger, as the heat exchanger is heightened, the distribution of the refrigerant quantity of pipelines with different heights of the heat exchanger is 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. According to the technical scheme, the output ends of the S heat exchanger outlet pipelines are connected with the input end of the pressure regulating assembly, the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines is regulated, and then the quantity of the refrigerant flowing through the S heat exchanger outlet pipelines and the quantity of the refrigerant flowing through the N-S heat exchanger outlet pipelines are regulated, so that the quantity of the refrigerant flowing through the S heat exchanger outlet pipelines and the quantity of the refrigerant flowing through the N-S heat exchanger outlet pipelines can be vaporized as much as possible, and the integral heat exchange effect of the heat exchanger is improved. The problem of influenced by gravity, the refrigerant volume distribution of the different high pipelines of heat exchanger is unreasonable is solved.
Based on the same conception, the embodiment of the present application provides a method for controlling the flow rate of a refrigerant in a heat exchanger, which is applied to the heat exchanger mentioned in the above embodiment, and is not repeated, as shown in fig. 8, and the method mainly includes:
step 801, detecting a refrigerant flow characterization parameter of the 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.
Step 802, according to the refrigerant flow characterization parameter, the refrigerant flow flowing through the pressure regulating assembly is adjusted.
In one embodiment, the refrigerant flow characterizing 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 who flows through pressure regulating subassembly, include:
And if the outdoor environment temperature is smaller than a preset environment temperature value, or the compressor operating frequency is smaller than a preset operating frequency value, or the evaporating pressure is smaller than a preset evaporating pressure value, the opening of the controllable valve is increased.
The controllable valve can be a thermal expansion valve or an electronic expansion valve, and the degree of pressure rise of the refrigerant flowing through each of the S heat exchanger outlet pipelines can be controlled by adjusting the opening degree of the controllable valve. The evaporating pressure refers to a pressure value acquired by a pressure sensor at the suction side of the compressor. The preset environmental temperature value, the preset operation frequency value and the preset evaporation pressure value can be empirical values or numerical values obtained after multiple tests.
When the outdoor environment temperature is smaller than a preset environment temperature value, or the operation frequency of the compressor is smaller than a preset operation frequency value, or the evaporation pressure is smaller than a preset evaporation pressure value, the refrigerant circulation quantity through the heat exchanger is small, the opening 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 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 who flows through pressure regulating subassembly, include:
And if the outdoor environment temperature is greater than a preset environment temperature value, or the compressor operating frequency is greater than a preset operating frequency value, or the evaporating pressure is greater than a preset evaporating pressure value, reducing the opening of the controllable valve.
When 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 of the controllable valve is reduced by a large amount of refrigerant circulation quantity of the heat exchanger, and the refrigerant circulation quantity can be adjusted to a proper and reasonable state. The opening of the controllable valve can be adjusted according to a controllable valve opening adjustment value corresponding to a section where a difference between a preset environmental temperature value and an outdoor environmental temperature is located, or according to a controllable valve opening adjustment value corresponding to a section where a difference between a preset operation frequency value and a compressor operation frequency is located, or according to a controllable valve opening adjustment value corresponding to a section where a difference between an evaporation pressure and a preset evaporation pressure value is located. In one embodiment, the refrigerant flow characterization parameter includes one of superheat, temperature and 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 who flows through pressure regulating subassembly, include:
If 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 opening of the controllable valve is reduced.
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 refrigerant quantity of the outlet pipelines of the N-S heat exchangers is small, the opening degree of the controllable valve is reduced, the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers is increased, the refrigerant is promoted to flow into the outlet pipelines of the N-S heat exchangers more, the refrigerant quantity flowing through the outlet pipelines of the N-S heat exchangers is increased, and the integral heat exchange effect of the heat exchangers is improved.
The opening of the controllable valve can be adjusted according to the controllable valve opening adjustment value corresponding to the interval where the difference value of the superheat degree and the preset superheat degree value is located, or according to the controllable valve opening adjustment value corresponding to the interval where the difference value of the temperature and the preset pipeline temperature value is located, or according to the controllable valve opening adjustment value corresponding to the interval where the difference value of the pressure and the preset pipeline pressure value is located.
Based on the same conception, the embodiment of the present application provides a method for controlling the flow rate of a refrigerant in a heat exchanger, which is applied to the heat exchanger mentioned in the above embodiment, and is not repeated, as shown in fig. 9, and the method mainly includes:
step 901, detecting a frosting state characterization parameter of a heat exchanger.
The frosting state characterization parameters are used for characterizing frosting states of outlet pipelines of the heat exchangers.
Step 902, according to the characterization parameter of the frosting state, the flow rate of the refrigerant flowing through the pressure regulating component is regulated.
In one embodiment, the frosting status characterization parameter comprises a temperature of an outlet line of the heat exchanger to which the controllable valve is connected; the pressure regulating assembly comprises at least one controllable valve;
According to frosting state characterization parameter, adjust the refrigerant flow who flows through pressure regulating subassembly, include:
If the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is smaller than the preset frosting temperature, the opening 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 multiple tests.
When the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is smaller than the preset frosting temperature, the outlet pipeline of the heat exchanger connected with the controllable valve has frosting tendency, the opening degree of the controllable valve is adjusted to improve the pressure of the refrigerant flowing through the outlet pipeline of the heat exchanger connected with the controllable valve, the flow rate of the refrigerant flowing through the outlet pipeline of the heat exchanger connected with the controllable valve is reduced, the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is increased, and the frosting tendency of the outlet pipeline of the heat exchanger connected with the controllable valve can be delayed.
In one embodiment, the frosting status 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 frosting state characterization parameter, adjust the refrigerant flow who flows through pressure regulating subassembly, include:
if the temperature of any one of the outlet pipelines of the N-S heat exchangers is smaller than the preset frosting temperature, opening of the controllable valve is increased;
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 of the controllable valve is reduced;
When the temperature of any one of the outlet pipelines of the N-S heat exchangers is smaller than the preset frosting temperature, the outlet pipelines of the N-S heat exchangers have frosting tendency, the opening degree of the controllable valve is adjusted to reduce the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers, so that the refrigerant is promoted 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 rate 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 conception, an embodiment of the present application provides an air conditioner, including: the heat exchanger mentioned in the above embodiment, and a blower;
The fan is located above the heat exchanger.
The repetition is not described in detail.
The fan is located the top of heat exchanger, and the distance between high little heat exchanger pipeline and the fan is far away, and the wind speed of high little heat exchanger pipeline is slow, and the refrigerant volume that can vaporize is little, and the distance between high heat exchanger pipeline and the fan is near, and the wind speed of high heat exchanger pipeline is fast, and the refrigerant volume that can vaporize is big.
According to the heat exchanger provided by the embodiment of the application, the output ends of the S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating assembly, the output ends of the N-S heat exchanger outlet pipelines are connected with the output ends of the pressure regulating assembly, then the output ends of the pressure regulating assembly are connected with the refrigerant output pipelines, and the pressure regulating assembly is used for increasing the pressure of the refrigerant flowing through the S heat exchanger outlet pipelines. The fan is positioned above the heat exchanger, the refrigerant quantity of the heat exchanger flow path with small height is more, but the air speed of the heat exchanger flow path with small height is low, the refrigerant quantity which can be vaporized is less, and the technical proposal is that the output ends of the S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating component, the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers is increased, the refrigerant quantity of the outlet pipelines of the S heat exchangers is reduced, and the vaporization refrigerant capacity and the refrigerant quantity of the outlet pipelines of the S heat exchangers are matched as much as possible; in addition, the fan is positioned above the heat exchanger, the refrigerant quantity of the high heat exchanger flow path is small, but the air speed of the high heat exchanger flow path is high, the quantity of the refrigerant which can be vaporized is large, and the technical proposal is that the output ends of the S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating components, the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers is increased, the refrigerant is promoted to flow into the outlet pipelines of the N-S heat exchangers more, the refrigerant quantity of the outlet pipelines of the N-S heat exchangers is increased, and the refrigerant vaporizing capacity and the refrigerant quantity of the outlet pipelines of the N-S heat exchangers are matched as much as possible, so that the overall heat exchange effect of the heat exchangers is improved.
It should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the 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 (17)

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 the input ends of N heat exchanger outlet pipelines, the output ends of S heat exchanger outlet pipelines are connected with the input ends of the pressure regulating assembly, the output ends of N-S heat exchanger outlet pipelines except the S heat exchanger outlet pipelines are connected with the output ends of the pressure regulating assembly and then connected with the refrigerant output pipelines, wherein N is greater than 1, S is less than or equal to N, S is not less than 1, and the heights of the N heat exchanger outlet pipelines are different;
The pressure regulating assembly is used for regulating the pressure of the refrigerant flowing through the outlet pipelines of the S heat exchangers;
The S heat exchanger outlet pipelines are the first S heat exchanger outlet pipelines with the heights of the N heat exchanger outlet pipelines ordered from small to large.
2. The heat exchanger of claim 1, wherein the pressure regulating assembly comprises at least one piping;
The sum of the length of the piping and the length of any one of the S heat exchanger outlet pipelines is greater than the length of any one of the N-S heat exchanger outlet pipelines, and/or the pipe diameter of the piping is smaller than the pipe diameter of the heat exchanger outlet pipeline.
3. The heat exchanger of claim 2, wherein the pressure regulating assembly comprises S tubing;
the input ends of the S pipes are connected with the output ends of the outlet pipelines of the S heat exchangers in a one-to-one correspondence mode, and the output ends of the S pipes are connected with the output ends of the outlet pipelines of the N-S heat exchangers and then connected with the refrigerant output pipelines.
4. The heat exchanger of claim 2, wherein the pressure regulating assembly comprises M tubing, M being less than S;
the output ends of L i heat exchanger outlet pipelines in the S heat exchanger outlet pipelines are 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, and L i is not less than 1 and The output ends of the M 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 2, wherein the pressure regulating assembly comprises s+m tubing, M being less than S;
The input ends of S pipes are connected with the output ends of the outlet pipelines of the S heat exchangers in a one-to-one correspondence manner, and the output ends of L i pipes in the S pipes are connected with the input ends of the ith pipe in M pipes except the S pipes in the S+M pipes, wherein i is not less than 1 and i is not more than M, and L i is not less than 1 and The output ends of the M pipes are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
6. The heat exchanger of claim 1, wherein the pressure regulating assembly comprises at least one controllable valve.
7. The heat exchanger of claim 6 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 outlet pipelines of the S heat exchangers in a one-to-one correspondence manner, and the output ends of the S 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 pipelines.
8. The heat exchanger of claim 6 wherein the pressure regulating assembly comprises M controllable valves, M being less than S;
the output ends of L i heat exchanger outlet pipelines in the S heat exchanger outlet pipelines are connected with the input end of the ith controllable valve in the M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and The output ends of the M 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 6 wherein the pressure regulating assembly comprises s+m controllable valves, M being less than S;
The input ends of S controllable valves are connected with the output ends of the outlet pipelines of S heat exchangers in one-to-one correspondence, and after the output ends of L i controllable valves in the S controllable valves are connected, the S controllable valves are connected with the input end of the ith controllable valve in M controllable valves except the S controllable valves in the S+M controllable valves, wherein i is not less than 1 and not more than M, and L i is not less than 1 and not more than 1 The output ends of the M controllable valves are connected with the output ends of the N-S heat exchanger outlet pipelines and then connected with the refrigerant output pipeline.
10. A method for controlling the flow rate of a refrigerant in a heat exchanger, which is applied to the heat exchanger of claim 1, comprising:
detecting a refrigerant flow characterization parameter of the heat exchanger;
and adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter.
11. The method of claim 10, wherein the refrigerant flow characterizing parameters include one of outdoor ambient temperature, compressor operating frequency, and evaporating pressure; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
And if the outdoor environment temperature is smaller than a preset environment temperature value, or the compressor operating frequency is smaller than a preset operating frequency value, or the evaporating pressure is smaller than a preset evaporating pressure value, opening of the controllable valve is regulated.
12. The method of claim 10, wherein the refrigerant flow characterizing parameters include one of outdoor ambient temperature, compressor operating frequency, and evaporating pressure; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
and if the outdoor environment temperature is greater than a preset environment temperature value, or the compressor operating frequency is greater than a preset operating frequency value, or the evaporating pressure is greater than a preset evaporating pressure value, reducing the opening of the controllable valve.
13. The method according to claim 10, wherein the refrigerant flow characterizing parameter includes one of superheat, temperature and pressure of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating assembly according to the refrigerant flow characterization parameter comprises the following steps:
And if the superheat degree of any one of the N-S heat exchanger outlet pipelines 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, reducing the opening of the controllable valve.
14. A method for controlling the flow rate of a refrigerant in a heat exchanger, which is applied to the heat exchanger of claim 1, comprising:
detecting a frosting state characterization parameter of the heat exchanger;
And adjusting the flow of the refrigerant flowing through the pressure regulating component according to the characterization parameter of the frosting state.
15. The method of claim 14, wherein the pressure regulating assembly comprises at least one controllable valve; the frosting state characterization parameters comprise the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating component according to the frosting state characterization parameter comprises the following steps:
If the temperature of the outlet pipeline of the heat exchanger connected with the controllable valve is smaller than the preset frosting temperature, the opening 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 regulated.
16. The method according to claim 14, wherein the frosting status characterization parameter includes a temperature of any one of the N-S heat exchanger outlet lines; the pressure regulating assembly includes at least one controllable valve;
the adjusting the refrigerant flow flowing through the pressure regulating component according to the frosting state characterization parameter comprises the following steps:
If the temperature of any one of the outlet pipelines of the N-S heat exchangers is smaller than the preset frosting temperature, opening 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, reducing the opening of the controllable valve.
17. An air conditioner, comprising: the heat exchanger of any one of claims 1 to 9, and a fan;
the fan is located above the heat exchanger.
CN202110575956.4A 2021-05-26 2021-05-26 Air conditioner, heat exchanger and heat exchanger refrigerant flow control method Active CN113251650B (en)

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