CN115164389A - Heat exchange assembly, air conditioning system and control method - Google Patents
Heat exchange assembly, air conditioning system and control method Download PDFInfo
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- CN115164389A CN115164389A CN202210877005.7A CN202210877005A CN115164389A CN 115164389 A CN115164389 A CN 115164389A CN 202210877005 A CN202210877005 A CN 202210877005A CN 115164389 A CN115164389 A CN 115164389A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007791 dehumidification Methods 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 238000001816 cooling Methods 0.000 claims description 23
- 230000001172 regenerating effect Effects 0.000 claims description 20
- 239000003507 refrigerant Substances 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000008929 regeneration Effects 0.000 abstract description 5
- 238000011069 regeneration method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 16
- 238000005057 refrigeration Methods 0.000 description 9
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heat exchange assembly, an air conditioning system and a control method, relates to the field of air conditioners, and solves the problems that the heating capacity and the energy efficiency of the air conditioning system are reduced when the air conditioning system is in a heating mode, and cold and hot air flows are naturally separated when the air conditioning system is in a temperature control dehumidification mode, and air flow outlet and air flow mixing is required to be realized by means of an air guide structure in a heat exchanger structure in the prior art. The heat exchange assembly comprises a first heat exchanger and a second heat exchanger, when the air conditioning system is in a dehumidification and heat regeneration mode, the first heat exchanger is a heat regeneration heat exchanger, the second heat exchanger is a dehumidification heat exchanger, the first heat exchanger is positioned below the second heat exchanger, and air heated by the first heat exchanger and air dehumidified by the second heat exchanger are automatically mixed. Compared with the structure in the prior art, the heat exchange assembly can improve the heat exchange temperature difference of the air conditioning system, so that the heating capacity and the energy efficiency of the air conditioning system can be improved; and the cold and hot air flow mixing can be realized without a wind guide structure, and the energy consumption of the air conditioning system can not be increased.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a heat exchange assembly, an air conditioning system and a control method.
Background
Along with the improvement of living standard, the requirements of people on the air conditioner are not satisfied with simple refrigeration and heating, but have various comfort requirements, such as temperature control and dehumidification, heating and no drying, and the like. The temperature control and dehumidification function of the air conditioner is mainly realized by a heat exchanger of an indoor unit. Specifically, the heat exchanger of the indoor unit comprises a dehumidifying heat exchanger and a regenerative heat exchanger, and the dehumidifying heat exchanger and the regenerative heat exchanger are connected through a throttling element.
The air conditioner in the market at present generally adopts the following two ways to realize temperature control dehumidification:
the first is that a dehumidification heat exchanger and a regenerative heat exchanger are arranged in front and at the back, and in a refrigeration mode, a refrigerant firstly passes through the regenerative heat exchanger and enters the dehumidification heat exchanger after throttling; the air flow direction is opposite, the air firstly passes through the dehumidification heat exchanger and then reaches the regenerative heat exchanger, and the temperature control dehumidification purpose is achieved by adjusting the air quantity, the compressor frequency and the rotating speed of the external fan. Fig. 1 shows a schematic view of a tandem arrangement of a dehumidifying heat exchanger and a recuperative heat exchanger. However, for this temperature control dehumidification method, when the air conditioning system is switched to the heating mode, the high-temperature gaseous refrigerant passes through the dehumidification heat exchanger and then passes through the regenerative heat exchanger, and the refrigerant flow direction and the air flow direction form a forward flow at this time, so that the heat exchange temperature difference of the air conditioning system is reduced, and the heating capacity and the energy efficiency of the air conditioning system are affected.
The second is to arrange the dehumidifying heat exchanger and the recuperative heat exchanger one above the other, as shown in fig. 2. Specifically, the dehumidification heat exchanger is arranged at the lower part, the regenerative heat exchanger is arranged at the upper part, part of air passes through the dehumidification heat exchanger, and part of air passes through the regenerative heat exchanger and then is converged to output air. However, to this kind of accuse temperature dehumidification mode, because cold air flow direction is downwards, hot air flow direction is upwards for cold and hot air current natural separation need just can realize the air current air-out with the help of wind-guiding structure and mix, otherwise causes the phenomenon of upper-heat lower cold, and the user feels the temperature on the low side when using accuse temperature dehumidification, influences and uses the travelling comfort, and indoor set heat exchanger still has the condensation risk. And the air guide structure is used for realizing air flow and air outlet mixing, so that the energy consumption of the air conditioning system can be increased.
Therefore, the heat exchange structure in the prior art needs to be improved urgently.
Disclosure of Invention
One of the purposes of the invention is to provide a heat exchange assembly, which solves the technical problems that the heating capacity and the energy efficiency of an air conditioning system are reduced when the air conditioning system is in a heating mode, and air flow and air outlet mixing of air flow needs to be realized by means of an air guide structure because cold air flow and hot air flow are naturally separated when the air conditioning system is in a temperature control dehumidification mode in a heat exchanger structure in the prior art. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the heat exchange assembly comprises a first heat exchanger and a second heat exchanger, when the air conditioning system is in a dehumidification and heat regeneration mode, the first heat exchanger is a heat regeneration heat exchanger, the second heat exchanger is a dehumidification heat exchanger, the first heat exchanger is positioned below the second heat exchanger, and air heated by the first heat exchanger and air dehumidified by the second heat exchanger are automatically mixed.
According to a preferred embodiment, the first heat exchanger and the second heat exchanger are arranged in a V-shaped structure, and an included angle of the V-shaped structure is located at an air outlet of the indoor fan, and an opening direction of the V-shaped structure faces an air outlet direction.
According to a preferred embodiment, the first heat exchanger and the second heat exchanger satisfy: and alpha is more than or equal to 60 degrees and less than or equal to 120 degrees, wherein alpha is an included angle between the first heat exchanger and the second heat exchanger.
According to a preferred embodiment, the first heat exchanger and the second heat exchanger satisfy: b is more than 0 and less than or equal to 50mm, wherein b is the horizontal distance between the end part of the first heat exchanger and the condensed water outlet of the second heat exchanger.
According to a preferred embodiment, in the first heat exchanger and the second heat exchanger, the number of the tube rows of the heat exchange tubes satisfies: d is not less than 1 1 ≤5，1≤d 2 Less than or equal to 5, wherein d 1 The number of the heat exchange tube rows in the first heat exchanger, d 2 The number of the heat exchange tube rows in the second heat exchanger.
According to a preferred embodiment, in the first heat exchanger and the second heat exchanger, the number of tube rows of heat exchange tubes is such that: d 2 ＜d 1 。
According to a preferred embodiment, the installation position of the heat exchange assembly satisfies the following conditions: beta is more than or equal to 30 degrees and less than or equal to 60 degrees, wherein the beta is an included angle between the first heat exchanger and the chassis.
According to a preferred embodiment, the heat exchange assembly further comprises a first electronic expansion valve, the first electronic expansion valve is disposed between the first heat exchanger and the second heat exchanger, and two ends of the first electronic expansion valve are respectively connected with the first heat exchanger and the second heat exchanger.
The heat exchange assembly provided by the invention at least has the following beneficial technical effects:
the heat exchange assembly comprises a first heat exchanger and a second heat exchanger, wherein when the air conditioning system is in a dehumidification heat recovery mode, the first heat exchanger is a heat recovery heat exchanger, the second heat exchanger is a dehumidification heat exchanger, the first heat exchanger is positioned below the second heat exchanger, and specifically, when the air conditioning system is in the dehumidification heat recovery mode, the first heat exchanger is in a heating state, and when the second heat exchanger is in a refrigeration dehumidification state, hot air flowing through the first heat exchanger flows upwards, and cold air flowing through the second heat exchanger flows downwards, so that air heated by the first heat exchanger and air dehumidified by the second heat exchanger can be automatically mixed.
Therefore, when the air conditioning system is in a heating mode, the high-temperature gaseous refrigerant firstly passes through the second heat exchanger and then passes through the first heat exchanger, the air flow direction is that partial air passes through the second heat exchanger, partial air passes through the first heat exchanger, the refrigerant flow direction and partial air flow direction form concurrent flow and form countercurrent flow with partial air, and compared with a structure that a dehumidification heat exchanger and a regenerative heat exchanger are arranged in front and at the back in the prior art, the heat exchange temperature difference of the air conditioning system is improved, so that the heating capacity and the energy efficiency of the air conditioning system can be improved; on the other hand, compared with the structure that the dehumidification heat exchanger and the regenerative heat exchanger are arranged up and down in the prior art, the heat exchange assembly can realize natural mixing of air flow without an air guide structure, so that the energy consumption of an air conditioning system cannot be increased, the phenomenon of up-heating and down-cooling cannot be caused, the comfort of a user is not influenced when the user uses a temperature control dehumidification function, and the condensation of the heat exchanger of the indoor unit can be avoided.
The heat exchange assembly solves the technical problems that the heating capacity and the energy efficiency of the heat exchanger structure in the prior art are reduced when the air conditioning system is in a heating mode, and air flow and air outlet mixing of air flow needs to be realized by means of an air guide structure because cold air flow and hot air flow are naturally separated when the air conditioning system is in a temperature control dehumidification mode.
A second object of the present invention is to provide an air conditioning system.
The air conditioning system comprises an outdoor unit assembly and an indoor heat exchange assembly, wherein the indoor heat exchange assembly is the heat exchange assembly in any technical scheme of the invention, and the outdoor unit assembly is connected with the indoor heat exchange assembly to form a refrigerant loop.
According to a preferred embodiment, the air conditioning system further comprises a first control valve and a second control valve, wherein the first control valve is connected with the first heat exchanger, and the first control valve is further connected with a compressor in the outdoor unit assembly; the second control valve is connected with a second heat exchanger, and the second control valve is also connected with a second electronic expansion valve in the outdoor unit assembly.
The air conditioning system provided by the invention at least has the following beneficial technical effects:
according to the air conditioning system, the indoor heat exchange assembly is the heat exchange assembly of any technical scheme, and compared with a structure that the dehumidification heat exchanger and the regenerative heat exchanger are arranged in front and at the back in the prior art, the heat exchange temperature difference of the air conditioning system is improved, so that the heating capacity and the energy efficiency of the air conditioning system can be improved; on the other hand, compared with the structure that the dehumidifying heat exchanger and the regenerative heat exchanger are arranged up and down in the prior art, the air conditioning system can realize natural mixing of air flow without an air guide structure, so that the energy consumption of the air conditioning system cannot be increased, the phenomenon of upper heating and lower cooling cannot be caused, the comfort of a user is not influenced when the temperature control dehumidifying function is used, and the condensation of the heat exchanger of the indoor unit can be avoided.
A third object of the present invention is to provide a control method of an air conditioning system.
The control method of the air conditioning system in any technical scheme of the invention comprises the following steps:
the working mode of the air conditioning system is obtained,
the working states of the first electronic expansion valve, the first control valve, the second control valve and the second electronic expansion valve are controlled, and the first heat exchanger and the second heat exchanger are simultaneously in a heating state or a refrigerating state, or the first heat exchanger and the second heat exchanger are respectively in the heating state or the refrigerating state.
According to a preferred embodiment, when the air conditioning system is in a cooling mode, the first electronic expansion valve is controlled to be in a closed state, the first control valve and the second control valve are controlled to be in an open state, the second electronic expansion valve is controlled to be in a throttling state, the first heat exchanger and the second heat exchanger are connected in parallel, and both the first heat exchanger and the second heat exchanger are in a cooling state.
According to a preferred embodiment, when the air conditioning system is in a heating mode, the first electronic expansion valve is controlled to be in a fully open state, the first control valve and the second control valve are controlled to be in a closed state, the second electronic expansion valve is controlled to be in a throttling state, the first heat exchanger and the second heat exchanger are connected in series, and both the first heat exchanger and the second heat exchanger are in a heating state.
According to a preferred embodiment, when the air conditioning system is in the dehumidification and heat regeneration mode, the first electronic expansion valve is controlled to be in a throttling state, the first control valve and the second control valve are controlled to be in a closed state, the second electronic expansion valve is controlled to be in a fully open state, the first heat exchanger and the second heat exchanger are connected in series, the first heat exchanger is in a heating state, and the second heat exchanger is in a cooling state.
The control method of the air conditioning system provided by the invention at least has the following beneficial technical effects:
according to the control method of the air conditioning system in any technical scheme, the working states of the first electronic expansion valve, the first control valve, the second control valve and the second electronic expansion valve are controlled, so that the air conditioning system can run in a refrigeration mode, a heating mode and a dehumidification backheating mode, and when the air conditioning system is in the dehumidification backheating mode, compared with a structure that a dehumidification heat exchanger and a backheating heat exchanger are arranged in front of and behind the prior art, the heat exchange temperature difference of the air conditioning system is improved, and therefore the heating capacity and the energy efficiency of the air conditioning system can be improved; on the other hand, compare in prior art with dehumidification heat exchanger and the structure of arranging from top to bottom of backheating heat exchanger, need not the wind-guiding structure and can realize the natural mixing of air current, therefore can not increase air conditioning system energy consumption, also can not cause the phenomenon of upper heat and lower cold, the travelling comfort is not influenced when the user uses accuse temperature dehumidification function to still can avoid indoor set heat exchanger condensation.
Drawings
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a preferred embodiment of a prior art heat exchanger;
FIG. 2 is a schematic view of another preferred embodiment of a prior art heat exchanger;
FIG. 3 is a schematic view of a preferred embodiment of a heat exchange assembly of the present invention;
FIG. 4 is a schematic drawing showing the heat exchange assembly of the present invention with dimensions indicated;
FIG. 5 is a schematic view of another preferred embodiment of a heat exchange assembly of the present invention;
FIG. 6 is a schematic diagram of a preferred embodiment of the air conditioning system of the present invention;
FIG. 7 is a schematic diagram of the air conditioning system of the present invention in a cooling mode;
FIG. 8 is a schematic diagram of the air conditioning system of the present invention in a heating mode;
FIG. 9 is a schematic diagram of the air conditioning system of the present invention in a dehumidification regenerative mode;
fig. 10 is a flowchart of an air conditioning system control method according to the present invention.
In the figure: 101. a first heat exchanger; 102. a second heat exchanger; 103. a first electronic expansion valve; 2. an indoor fan; 3. a chassis; 4. a first control valve; 5. a second control valve; 6. a compressor; 7. a second electronic expansion valve; 8. a four-way valve; 9. an outdoor heat exchanger; 10. an outdoor fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.
The heat exchange assembly, the air conditioning system and the control method of the invention are described in detail in the following with reference to the attached drawings 3 to 10 and the embodiments 1 to 3 of the specification.
Example 1
This example illustrates the heat exchange assembly of the present invention in detail.
The heat exchange assembly of the present embodiment includes a first heat exchanger 101 and a second heat exchanger 102, as shown in fig. 3 to 5. Preferably, when the air conditioning system is in the dehumidification and heat recovery mode, the first heat exchanger 101 is a heat recovery heat exchanger, the second heat exchanger 102 is a dehumidification heat exchanger, the first heat exchanger 101 is located below the second heat exchanger 102, and the air heated by the first heat exchanger 101 and the air dehumidified by the second heat exchanger 102 are automatically mixed, as shown in fig. 3 to 5. When the air conditioning system is in the dehumidification and regenerative mode, the air flow direction is as shown by the arrows in fig. 3. The heat exchange assembly of the present embodiment is used indoors, and the first heat exchanger 101 can also be called a regenerative heat exchanger, and the second heat exchanger 102 can also be called a dehumidifying heat exchanger.
Specifically, when the air conditioning system is in the dehumidification and heat recovery mode, the heat exchange assembly of the embodiment realizes automatic air mixing in the following manner: when the air conditioning system is in the dehumidification and heat recovery mode, the first heat exchanger 101 is in the heating state, and the second heat exchanger 102 is in the cooling and dehumidification state, since the first heat exchanger 101 is located below the second heat exchanger 102, the hot air flowing through the first heat exchanger 101 flows upward, and the cold air flowing through the second heat exchanger 102 flows downward, so that the air heated by the first heat exchanger 101 and the air dehumidified by the second heat exchanger 102 can be automatically mixed, as shown in fig. 3.
It can be seen that, in the heat exchange assembly of this embodiment, when the air conditioning system is in the heating mode, the high-temperature gaseous refrigerant first passes through the second heat exchanger 102 and then passes through the first heat exchanger 101, and the air flow direction is that a part of air passes through the second heat exchanger 102 and a part of air passes through the first heat exchanger 101, and the refrigerant flow direction and the part of air flow direction form a concurrent flow and form a counter flow with a part of air; on the other hand, the heat exchange assembly of this embodiment compares in prior art with dehumidification heat exchanger and the structure of arranging from top to bottom of backheating heat exchanger, need not the wind-guiding structure and can realize the natural mixture of air current, therefore can not increase air conditioning system energy consumption, also can not cause the phenomenon of upper heating and lower cold, and the travelling comfort is not influenced when the user uses accuse temperature dehumidification function to still can avoid indoor set heat exchanger condensation. The heat exchange assembly of the embodiment solves the technical problems that the heating capacity and the energy efficiency of the heat exchanger structure in the prior art are reduced when the air conditioning system is in a heating mode, cold air and hot air are naturally separated when the air conditioning system is in a temperature control dehumidification mode, and air outlet and air mixing of the air flow is required by means of the air guide structure.
According to a preferred embodiment, the first heat exchanger 101 and the second heat exchanger 102 are arranged in a V-shaped configuration, as shown in fig. 3-5. Preferably, the included angle of the V-shaped structure is located at the air outlet of the indoor fan 2, and the opening direction of the V-shaped structure faces the air outlet direction, as shown in fig. 3 to 5. According to the heat exchange assembly adopting the preferable technical scheme, the first heat exchanger 101 and the second heat exchanger 102 are arranged in the V-shaped structure, when the air conditioning system is in the dehumidification and heat return mode, the mixing effect of cold and hot air can be improved, and the problem that condensed water generated when the second heat exchanger 102 is used for refrigeration and dehumidification flows to the first heat exchanger 101 to cause re-evaporation of the dehumidified condensed water can be avoided. On the other hand, indoor fan 2's air outlet and exhaust pipe are connected, the heat exchange assembly of the preferred technical scheme of this embodiment, and the contained angle of V type structure is located indoor fan 2's air outlet department to can improve indoor fan 2's antistatic effect.
Preferably, the first heat exchanger 101 and the second heat exchanger 102 satisfy: alpha is more than or equal to 60 degrees and less than or equal to 120 degrees, wherein alpha is an included angle between the first heat exchanger 101 and the second heat exchanger 102. Alpha is indicated by the label in fig. 4. In the heat exchange assembly of the preferred technical scheme of this embodiment, an included angle between the first heat exchanger 101 and the second heat exchanger 102 is: alpha is more than or equal to 60 degrees and less than or equal to 120 degrees, so that the problem that the included angle between the first heat exchanger 101 and the second heat exchanger 102 is too large, the number of each row of heat exchange tubes of the first heat exchanger 101 and the second heat exchanger 102 is reduced, the number of rows of heat exchange tubes of the first heat exchanger 101 and the second heat exchanger 102 needs to be increased in order to ensure that the heat exchange effect of the first heat exchanger 101 and the dehumidification effect of the second heat exchanger are not influenced, but the number of rows of heat exchange tubes is not too large and is generally not more than 3, and the dehumidification effect of the second heat exchanger 102 can be influenced; the included angle between the first heat exchanger 101 and the second heat exchanger 102 is: alpha is more than or equal to 60 degrees and less than or equal to 120 degrees, and the problem that the cold and hot air mixing effect is influenced because the included angle between the first heat exchanger 101 and the second heat exchanger 102 is too small can be avoided.
Preferably, the first heat exchanger 101 and the second heat exchanger 102 satisfy: b is more than 0 and less than or equal to 50mm, wherein b is the horizontal distance between the end part of the first heat exchanger 101 and the condensed water outlet of the second heat exchanger 102. The end of the first heat exchanger 101 is also the end of the first heat exchanger 101 close to the second heat exchanger 102, and the condensed water outlet of the second heat exchanger 102 is also the lowest position of the second heat exchanger 102. b are shown as labels in fig. 4. In the heat exchange assembly of the preferred technical solution of this embodiment, the first heat exchanger 101 and the second heat exchanger 102 satisfy: b is more than 0 and less than or equal to 50mm, so that condensed water generated during refrigeration and dehumidification of the second heat exchanger 102 flows into the water pan, and the problem that the condensed water after dehumidification needs to be re-evaporated because the condensed water flows into the first heat exchanger 101 is avoided.
Preferably, in the first heat exchanger 101 and the second heat exchanger 102, the number of the tube rows of the heat exchange tubes satisfies: d is not less than 1 1 ≤5，1≤d 2 Less than or equal to 5, wherein d 1 The number of rows of heat exchange tubes in the first heat exchanger 101, d 2 The number of the heat exchange tube rows in the second heat exchanger 102. In the heat exchange assembly of the preferred technical scheme of this embodiment, in the first heat exchanger 101 and the second heat exchanger 102, the number of tube rows of the heat exchange tubes satisfies: d is not less than 1 1 ≤5，1≤d 2 The number of the tube rows of the heat exchange tubes is less than or equal to 5, so that the problem that the heat exchange effect of the first heat exchanger 101 and the second heat exchanger 102 is reduced or the size of the first heat exchanger 101 and the second heat exchanger 102 is too large can be avoided.
More preferably, the number of rows of heat exchange tubes in the first heat exchanger 101 may be the same as or different from the number of rows of heat exchange tubes in the second heat exchanger 102. When the number of the heat exchange tube rows in the first heat exchanger 101 is the same as that of the heat exchange tube rows in the second heat exchanger 102, the number of the heat exchange tube rows in the first heat exchanger 101 and that of the heat exchange tube rows in the second heat exchanger 102 are both 2 rows, as shown in fig. 3 or fig. 4. When the number of the heat exchange tube rows in the first heat exchanger 101 is different from that of the heat exchange tube rows in the second heat exchanger 102, the number of the heat exchange tube rows in the first heat exchanger 101 and the second heat exchanger 102 satisfies the following conditions: d 2 ＜d 1 As shown in fig. 5. Due to the elimination of the first row of heat exchange tubes on the windward side in the second heat exchanger 102The best moisture effect is that the dehumidification effect of the heat exchange tubes gradually attenuates from the direction close to the windward side to the direction far away from the windward side, so that when the number of the heat exchange tube rows in the first heat exchanger 101 is different from that of the heat exchange tube rows in the second heat exchanger 102, the number of the heat exchange tube rows in the second heat exchanger 102 is smaller than that of the heat exchange tubes in the first heat exchanger 101, and the dehumidification effect of the heat exchange assembly can be ensured.
Preferably, the installation position of the heat exchange assembly satisfies the following conditions: beta is more than or equal to 30 degrees and less than or equal to 60 degrees, wherein the beta is an included angle between the first heat exchanger 101 and the chassis 3. Beta is shown as the label in figure 4. The heat exchange assembly of the preferred technical scheme of this embodiment, heat exchange assembly's mounted position satisfies: beta is more than or equal to 30 degrees and less than or equal to 60 degrees, so that the uniformity of heat exchange of the first heat exchanger 101 and the second heat exchanger 102 can be ensured. Specifically, an included angle between the first heat exchanger 101 and the chassis 3 is too large, which causes a windward area of the second heat exchanger 102 to become small, so that a heat exchange amount of the second heat exchanger 102 is smaller than that of the first heat exchanger 101, refrigerant passing through the second heat exchanger 102 is incompletely evaporated, and a heat exchange effect of the second heat exchanger 102 becomes poor; similarly, the included angle between the first heat exchanger 101 and the chassis 3 is too small, which causes the windward area of the first heat exchanger 101 to become small, so that the heat exchange amount of the first heat exchanger 101 is smaller than that of the second heat exchanger 102, the refrigerant passing through the first heat exchanger 101 is not completely evaporated, and the heat exchange effect of the first heat exchanger 101 becomes poor.
According to a preferred embodiment, the heat exchange assembly further comprises a first electronic expansion valve 103, the first electronic expansion valve 103 is disposed between the first heat exchanger 101 and the second heat exchanger 102, and both ends of the first electronic expansion valve 103 are respectively connected with the first heat exchanger 101 and the second heat exchanger 102, as shown in fig. 6 to 9. According to the heat exchange assembly of the preferred technical scheme of the embodiment, the first heat exchanger 101 and the second heat exchanger 102 are connected through the first electronic expansion valve 103, so that no physical isolation fin is needed between the first heat exchanger 101 and the second heat exchanger 102, the structure of the heat exchange assembly is simple, and the production efficiency is improved.
Example 2
This embodiment will explain the air conditioning system of the present invention in detail.
The air conditioning system of this embodiment includes off-premises station subassembly and indoor heat exchange assembly. Preferably, the indoor heat exchange assembly is the heat exchange assembly according to any one of the technical solutions of embodiment 1, and the outdoor unit assembly is connected to the indoor heat exchange assembly to form a refrigerant loop, as shown in fig. 6 to 9. The air conditioning system of the embodiment is a ducted air conditioner. Preferably, the outdoor unit assembly has the same structure as the prior art, and specifically, the outdoor unit assembly includes a compressor 6, a second electronic expansion valve 7, a four-way valve 8, and an outdoor heat exchanger 9, wherein the four-way valve 8 is connected to the compressor 6, when the air conditioning system is in different modes, the four-way valve 8 is used to control the flow direction of the refrigerant, and the compressor 6, the outdoor heat exchanger 9 and the second electronic expansion valve 7 are connected to form a refrigerant flow path, as shown in fig. 6 to 9. The air conditioning system further includes an indoor fan 2 and an outdoor fan 10, and the structures and functions of the indoor fan 2 and the outdoor fan 10 may be the same as those of the prior art, which is not described herein again.
In the air conditioning system of the present embodiment, the indoor heat exchange assembly is the heat exchange assembly in any one of the technical solutions of embodiment 1, and compared with a structure in which the dehumidification heat exchanger and the regenerative heat exchanger are arranged in front and at the back in the prior art, the heat exchange temperature difference of the air conditioning system is increased, so that the heating capacity and the energy efficiency of the air conditioning system can be improved; on the other hand, compare the structure of arranging dehumidification heat exchanger and backheat heat exchanger from top to bottom among the prior art, the air conditioning system of this embodiment need not wind-guiding structure and can realize the natural mixture of air current, therefore can not increase the air conditioning system energy consumption, also can not cause the phenomenon of upper heat and lower cold, and the travelling comfort is not influenced when the user uses accuse temperature dehumidification function to still can avoid indoor set heat exchanger condensation.
According to a preferred embodiment, the air conditioning system further comprises a first control valve 4 and a second control valve 5, as shown in fig. 6 to 9. Preferably, the first control valve 4 is connected with the first heat exchanger 101, and the first control valve 4 is also connected with the compressor 6 in the outdoor unit assembly; the second control valve 5 is connected to the second heat exchanger 102, and the second control valve 5 is also connected to the second electronic expansion valve 7 in the outdoor unit assembly, as shown in fig. 6 to 9. The air conditioning system of the preferred technical solution of this embodiment further includes a first control valve 4 and a second control valve 5, and by controlling the operating states of the first electronic expansion valve 103, the first control valve 4, the second control valve 5, and the second electronic expansion valve 7, the first heat exchanger 101 and the second heat exchanger 102 can be simultaneously in a heating state or a cooling state, or the first heat exchanger 101 and the second heat exchanger 102 can be respectively in a heating state or a cooling state, so that the air conditioning system can operate in a cooling mode, a heating mode, or a dehumidification and heat recovery mode.
Example 3
The present embodiment describes the control method of the air conditioning system in detail.
Fig. 10 is a flowchart of an air conditioning system control method, and as shown in fig. 10, the air conditioning system control method according to any one of embodiments 2 includes the steps of:
the working mode of the air-conditioning system is obtained,
the working states of the first electronic expansion valve 103, the first control valve 4, the second control valve 5 and the second electronic expansion valve 7 are controlled, and the first heat exchanger 101 and the second heat exchanger 102 are simultaneously in a heating state or a cooling state, or the first heat exchanger 101 and the second heat exchanger 102 are respectively in the heating state or the cooling state.
In the control method of the air conditioning system according to any of the embodiment 2, the first electronic expansion valve 103, the first control valve 4, the second control valve 5, and the second electronic expansion valve 7 are controlled to operate in a cooling mode, a heating mode, and a dehumidifying and backheating mode, and when the air conditioning system is in the dehumidifying and backheating mode, compared with a structure in which a dehumidifying heat exchanger and a backheating heat exchanger are arranged in front of and behind in the prior art, the heat exchange temperature difference of the air conditioning system is increased, so that the heating capacity and the energy efficiency of the air conditioning system can be increased; on the other hand, compare in prior art with the dehumidification heat exchanger and the structure of arranging from top to bottom of backheating heat exchanger, need not wind-guiding structure and can realize the natural mix of air current, therefore can not increase air conditioning system energy consumption, also can not cause the phenomenon of upper heating and lower cold, the travelling comfort is not influenced when the user uses accuse temperature dehumidification function, still can avoid indoor set heat exchanger condensation.
Specifically, as shown in fig. 7, when the air conditioning system is in the cooling mode, the first electronic expansion valve 103 is controlled to be in a closed state, the first control valve 4 and the second control valve 5 are controlled to be in an open state, the second electronic expansion valve 7 is controlled to be in a throttling state, the first heat exchanger 101 and the second heat exchanger 102 are connected in parallel, and both the first heat exchanger 101 and the second heat exchanger 102 are in a cooling state. When the air conditioning system is in a refrigeration mode, the first electronic expansion valve 103 is closed, the first control valve 4 and the second control valve 5 are opened, the second electronic expansion valve 7 is controlled to be in a throttling state, a refrigerant flows out through the compressor 6 and then is throttled through the second electronic expansion valve 7, and two paths of the refrigerant pass through the first heat exchanger 101 and the second heat exchanger 102, so that the first heat exchanger 101 and the second heat exchanger 102 are both in a refrigeration state, namely the air conditioning system operates in the refrigeration mode.
Specifically, as shown in fig. 8, when the air conditioning system is in the heating mode, the first electronic expansion valve 103 is controlled to be in a fully open state, the first control valve 4 and the second control valve 5 are controlled to be in a closed state, the second electronic expansion valve 7 is controlled to be in a throttling state, the first heat exchanger 101 and the second heat exchanger 102 are connected in series, and both the first heat exchanger 101 and the second heat exchanger 102 are in a heating state. When the air conditioning system is in a heating mode, the first electronic expansion valve 103 is in a fully open state, the first control valve 4 and the second control valve 5 are closed, the second electronic expansion valve 7 is in a throttling state, and after the refrigerant is switched by the four-way valve 8, the refrigerant flowing out of the compressor 6 passes through the second heat exchanger 102, passes through the first electronic expansion valve 103, flows through the first heat exchanger 101, and is throttled by the second electronic expansion valve 7, so that the first heat exchanger 101 and the second heat exchanger 102 are both in a heating state, namely the air conditioning system operates in the heating mode.
Specifically, as shown in fig. 9, when the air conditioning system is in the dehumidification and heat recovery mode, the first electronic expansion valve 103 is controlled to be in the throttling state, the first control valve 4 and the second control valve 5 are controlled to be in the closed state, and the second electronic expansion valve 7 is controlled to be in the fully open state, so that the first heat exchanger 101 and the second heat exchanger 102 are connected in series, and the first heat exchanger 101 is in the heating state, and the second heat exchanger 102 is in the cooling state. When the air conditioning system is in a dehumidification regenerative mode, the first electronic expansion valve 103 is in a throttling state, the first control valve 4 and the second control valve 5 are closed, the second electronic expansion valve 7 is in a fully-opened state, a refrigerant flows out through the compressor 6 and then passes through the second electronic expansion valve 7 and then the first heat exchanger 101, and then enters the second heat exchanger 102 after being throttled by the first electronic expansion valve 103, so that the first heat exchanger 101 can be in a heating state to play a regenerative function, and the second heat exchanger 102 is in a refrigerating state to play a cooling and dehumidifying function, namely, the air conditioning system operates in the dehumidification regenerative mode, and meanwhile, the air conditioning system achieves the purposes of dehumidification without cooling or little cooling.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (14)
1. A heat exchange assembly is characterized by comprising a first heat exchanger (101) and a second heat exchanger (102), when an air conditioning system is in a dehumidification and heat recovery mode, the first heat exchanger (101) is a heat recovery heat exchanger, the second heat exchanger (102) is a dehumidification heat exchanger, the first heat exchanger (101) is located below the second heat exchanger (102), and air heated by the first heat exchanger (101) is automatically mixed with air dehumidified by the second heat exchanger (102).
2. The heat exchange assembly according to claim 1, wherein the first heat exchanger (101) and the second heat exchanger (102) are arranged in a V-shaped structure, the included angle of the V-shaped structure is positioned at the air outlet of the indoor fan (2), and the opening direction of the V-shaped structure faces the air outlet direction.
3. A heat exchange assembly according to claim 2, wherein the first heat exchanger (101) and the second heat exchanger (102) satisfy: 60 DEG-alpha-120 DEG, wherein alpha is the included angle between the first heat exchanger (101) and the second heat exchanger (102).
4. A heat exchange assembly according to claim 2, wherein the first heat exchanger (101) and the second heat exchanger (102) satisfy: b is more than 0 and less than or equal to 50mm, wherein b is the horizontal distance between the end part of the first heat exchanger (101) and the condensed water outlet of the second heat exchanger (102).
5. A heat exchange assembly according to claim 2, wherein in the first heat exchanger (101) and the second heat exchanger (102), the number of rows of heat exchange tubes is such that: d is not less than 1 1 ≤5，1≤d 2 Less than or equal to 5, wherein d 1 The number of the heat exchange tube rows in the first heat exchanger (101), d 2 The number of the heat exchange tube rows in the second heat exchanger (102).
6. Root of herbaceous plantsA heat exchange assembly according to claim 5, wherein in the first heat exchanger (101) and the second heat exchanger (102), the number of rows of heat exchange tubes is such that: d 2 ＜d 1 。
7. The heat exchange assembly of claim 2, wherein the heat exchange assembly is mounted in a position that satisfies: beta is more than or equal to 30 degrees and less than or equal to 60 degrees, wherein the beta is an included angle between the first heat exchanger (101) and the chassis (3).
8. A heat exchange assembly according to any one of claims 1 to 7, further comprising a first electronic expansion valve (103), wherein the first electronic expansion valve (103) is arranged between the first heat exchanger (101) and the second heat exchanger (102), and both ends of the first electronic expansion valve (103) are connected with the first heat exchanger (101) and the second heat exchanger (102), respectively.
9. An air conditioning system, comprising an outdoor unit assembly and an indoor heat exchange assembly, wherein the indoor heat exchange assembly is the heat exchange assembly of any one of claims 1 to 8, and the outdoor unit assembly is connected with the indoor heat exchange assembly to form a refrigerant loop.
10. The air conditioning system of claim 9, further comprising a first control valve (4) and a second control valve (5), wherein the first control valve (4) is connected to a first heat exchanger (101) and the first control valve (4) is further connected to a compressor (6) in the outdoor unit assembly; the second control valve (5) is connected with a second heat exchanger (102), and the second control valve (5) is also connected with a second electronic expansion valve (7) in the outdoor unit assembly.
11. A control method of an air conditioning system according to claim 9 or 10, characterized by comprising the steps of:
the working mode of the air conditioning system is obtained,
the working states of the first electronic expansion valve (103), the first control valve (4), the second control valve (5) and the second electronic expansion valve (7) are controlled, and the first heat exchanger (101) and the second heat exchanger (102) are simultaneously in a heating state or a cooling state, or the first heat exchanger (101) and the second heat exchanger (102) are respectively in the heating state or the cooling state.
12. The control method of an air conditioning system according to claim 11, wherein the first electronic expansion valve (103) is controlled to be in a closed state, the first control valve (4) and the second control valve (5) are controlled to be in an open state, and the second electronic expansion valve (7) is controlled to be in a throttle state when the air conditioning system is in a cooling mode,
and the first heat exchanger (101) and the second heat exchanger (102) are connected in parallel with each other, and the first heat exchanger (101) and the second heat exchanger (102) are in a refrigerating state.
13. The control method of the air conditioning system according to claim 11, wherein the first electronic expansion valve (103) is controlled to be in a fully open state, the first control valve (4) and the second control valve (5) are controlled to be in a closed state, and the second electronic expansion valve (7) is controlled to be in a throttle state when the air conditioning system is in a heating mode,
and the first heat exchanger (101) and the second heat exchanger (102) are connected in series, and the first heat exchanger (101) and the second heat exchanger (102) are both in a heating state.
14. The method for controlling an air conditioning system according to claim 11, wherein when the air conditioning system is in the dehumidification regenerative mode, the first electronic expansion valve (103) is controlled to be in a throttling state, the first control valve (4) and the second control valve (5) are controlled to be in a closed state, and the second electronic expansion valve (7) is controlled to be in a fully open state,
and the first heat exchanger (101) and the second heat exchanger (102) are connected in series with each other, and the first heat exchanger (101) is in a heating state and the second heat exchanger (102) is in a cooling state.
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| CN202210877005.7A CN115164389A (en) | 2022-07-25 | 2022-07-25 | Heat exchange assembly, air conditioning system and control method |
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| CN202210877005.7A CN115164389A (en) | 2022-07-25 | 2022-07-25 | Heat exchange assembly, air conditioning system and control method |
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