CN111023312A - Air conditioner indoor unit - Google Patents
Air conditioner indoor unit Download PDFInfo
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- CN111023312A CN111023312A CN201911267655.4A CN201911267655A CN111023312A CN 111023312 A CN111023312 A CN 111023312A CN 201911267655 A CN201911267655 A CN 201911267655A CN 111023312 A CN111023312 A CN 111023312A
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- heat exchange
- heat exchanger
- exchange tube
- refrigerant
- heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/66—Sleep 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
- F24F11/83—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
- F24F13/30—Arrangement or mounting of heat-exchangers
Abstract
The invention discloses an air-conditioning indoor unit, comprising: the first heat exchanger comprises a first heat exchange tube; the second heat exchanger is connected with the first heat exchanger in series and comprises a second heat exchange tube, and the diameter of the second heat exchange tube is larger than that of the first heat exchange tube; the first refrigerant flow channel is formed in the first heat exchanger and the second heat exchanger and can enable a refrigerant to sequentially flow through the second heat exchange tube and the first heat exchange tube to realize rapid refrigeration when the first refrigerant flow channel is conducted; the refrigerant flows through the first heat exchange tube and the second heat exchange tube in sequence to realize rapid heating; the first control valve is arranged on the first refrigerant flow channel; the second refrigerant flow channel enables the refrigerant to sequentially flow through the first heat exchange tube and the second heat exchange tube to realize refrigeration; the refrigerant flows through the second heat exchange tube and the first heat exchange tube in sequence to realize heating; and the second control valve is arranged on the second refrigerant flow channel. The invention solves the problems of slow refrigeration and heating, large temperature reduction during dehumidification and poor user experience of the air conditioner indoor unit in the prior art.
Description
Technical Field
The invention belongs to the technical field of household electrical equipment, and particularly relates to an improvement of an air conditioner indoor unit structure.
Background
The existing indoor unit structure of the air conditioner mostly comprises an indoor heat exchanger, heat exchange with outside air is realized through the indoor heat exchanger, and then refrigeration or heating is realized, copper pipes adopted by the indoor heat exchanger are all single pipe diameters, the copper pipes are inserted in fins to form a heat exchanger structure, the pipe diameters of the copper pipes of the commonly used heat exchanger are phi 9.52mm, phi 7mm, or phi 5mm, and the like, during refrigeration, refrigerant flowing out through a compressor sequentially flows through an outdoor heat exchanger and an indoor heat exchanger, refrigeration is realized through heat exchange between the copper pipes in the indoor heat exchanger and the air, the refrigeration effect is general, when gaseous refrigerant flowing out from the compressor sequentially flows through the indoor heat exchanger and the outdoor heat exchanger, heating is realized through heat exchange between the copper pipes in the indoor heat exchanger and the air, and because of the limitation of the pipe diameters of the copper pipes, the refrigeration and heating can reach the required temperature after a certain time, refrigeration and heating are slow, meanwhile, dehumidification is mainly achieved through low-temperature refrigeration during dehumidification, the temperature suddenly drops to a lower temperature during dehumidification, and users feel wet and cold and experience is poor.
Disclosure of Invention
The invention provides a novel air conditioner indoor unit for solving the technical problems, which aims at solving the problems of slow refrigeration and heating, large temperature reduction during dehumidification and poor user experience of the air conditioner indoor unit in the prior art.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
the utility model provides an indoor set of air conditioning, the inside indoor heat exchanger that is provided with of indoor set of air conditioning, indoor heat exchanger is including: comprises the following steps:
the first heat exchanger comprises a first heat exchange tube;
the second heat exchanger is connected with the first heat exchanger in series and comprises a second heat exchange tube, and the diameter of the second heat exchange tube is larger than that of the first heat exchange tube;
the first refrigerant flow channel is formed in the first heat exchanger and the second heat exchanger and can enable the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger to sequentially flow through the second heat exchange pipe and the first heat exchange pipe so as to realize rapid refrigeration when the first refrigerant flow channel is conducted;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor sequentially flows through the first heat exchange tube and the second heat exchange tube to realize rapid heating;
the first control valve is arranged on the first refrigerant flow channel and used for controlling the on-off of the first refrigerant flow channel;
the second refrigerant flow channel is formed in the first heat exchanger and the second heat exchanger, and can enable the refrigerant flowing out of the liquid tube side of the outdoor heat exchanger to sequentially flow through the first heat exchange tube and the second heat exchange tube so as to realize refrigeration and dehumidification when the second refrigerant flow channel is conducted;
when the compressor is conducted, the refrigerant flowing out of the exhaust port side of the compressor sequentially flows through the second heat exchange tube and the first heat exchange tube to realize heating;
and the second control valve is arranged on the second refrigerant flow channel and used for controlling the on-off of the first refrigerant flow channel.
The heat exchanger further comprises a third heat exchanger which is connected with the first heat exchanger in series and comprises a third heat exchange tube, and the diameter of the third heat exchange tube is larger than that of the first heat exchange tube;
the first refrigerant channel is configured to: the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger sequentially flows through the second heat exchange pipe and the first heat exchange pipe and then flows through the third heat exchange pipe so as to realize quick refrigeration;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor flows through the third heat exchange tube, the first heat exchange tube and the second heat exchange tube in sequence to realize rapid heating.
Further, the second refrigerant flow channel is configured to: the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger can sequentially flow through the third heat exchange pipe, the first heat exchange pipe and the second heat exchange pipe to realize refrigeration when the refrigerant is conducted;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor flows through the second heat exchange tube, the first heat exchange tube and the third heat exchange tube in sequence to realize heating.
Furthermore, the second heat exchanger comprises a plurality of second heat exchange tubes which are sequentially connected in series to form a second heat exchange tube group.
Furthermore, the first heat exchanger comprises a plurality of groups of first heat exchange tube sets, each group of first heat exchange tube sets is formed by sequentially connecting a plurality of first heat exchange tubes in series, and the plurality of groups of first heat exchange tube sets are connected in parallel and then combined into one path and connected in series with the second heat exchange tube set of the second heat exchanger.
Furthermore, the third heat exchanger comprises a plurality of third heat exchange tubes, the plurality of third heat exchange tubes are sequentially connected in series to form a third heat exchange tube set, and the third heat exchange tube set is connected in series with the first heat exchange tube set.
Furthermore, 2 first control valves are arranged, wherein one of the 2 first control valves is positioned on the liquid pipe section between the main liquid pipe opening and the refrigerant opening of the second heat exchanger; the other is positioned on the air pipe section between the main air pipe opening and the refrigerant opening of the first heat exchanger;
and 2 second control valves are arranged, wherein one of the second control valves is positioned on a liquid pipe section between the main liquid pipe opening and the refrigerant opening of the first heat exchanger, and the other second control valve is positioned on a gas pipe section between the main gas pipe opening and the refrigerant opening of the second heat exchanger.
Further, the indoor heat exchanger is V-shaped, U-shaped or C-shaped.
Furthermore, the first heat exchanger is positioned on the inner row of the indoor heat exchanger, and the second heat exchanger is positioned on the outer row of the indoor heat exchanger and close to the windward side of the indoor heat exchanger.
Further, the row number of the second heat exchanger is smaller than that of the first heat exchanger.
Compared with the prior art, the invention has the advantages and positive effects that:
the indoor unit of the air conditioner comprises indoor heat exchangers which are formed by connecting 2 heat exchangers with different specifications in series, a first refrigerant flow channel and a second refrigerant flow channel which are communicated are correspondingly formed in the first heat exchanger and the second heat exchanger, and the corresponding first refrigerant flow channel or the second refrigerant flow channel is communicated by controlling the corresponding first control valve or the corresponding second control valve, so that quick refrigeration and quick heating can be realized when the first refrigerant flow channel is communicated, the time required by refrigeration and heating is short, and the refrigeration and heating effects are improved;
when the second refrigerant runner is conducted, ordinary refrigeration or dehumidification and ordinary heating effects can be achieved, and when dehumidification is conducted, the first heat exchange tube and the second heat exchange tube can be sequentially arranged when the refrigerant flows through the second refrigerant runner, so that the temperature is slowly reduced during dehumidification, and the user experience is improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of an indoor unit of an air conditioner according to the present invention;
fig. 2 is a first schematic structural view of an indoor heat exchanger according to a first embodiment of an indoor unit of an air conditioner of the present invention;
FIG. 3 is a second schematic structural view of an indoor heat exchanger according to a first embodiment of the indoor unit of an air conditioner of the present invention;
FIG. 4 is a schematic view of an indoor heat exchanger according to an embodiment of the indoor unit of an air conditioner of the present invention;
fig. 5 is a schematic view of an indoor heat exchanger according to a second embodiment of the indoor unit of an air conditioner of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows:
the invention provides an embodiment of an air-conditioning indoor unit, which is shown in figures 1-4.A heat exchanger 100 is arranged in the air-conditioning indoor unit, the heat exchanger 100 is connected with an outdoor heat exchanger and a compressor to form a refrigeration cycle loop, gas exhausted from an exhaust port of the compressor enters the outdoor heat exchanger after passing through a four-way valve during refrigeration, a gaseous refrigerant is changed into a liquid refrigerant after passing through the outdoor heat exchanger, the liquid refrigerant flows into a liquid pipe of the indoor heat exchanger 100 from the liquid pipe of the outdoor heat exchanger, then the refrigerant is changed into a gaseous state from the liquid state after passing through the indoor heat exchanger 100, the refrigerant absorbs heat to realize refrigeration, and finally the refrigerant directly enters the compressor after flowing out of the indoor heat exchanger.
Specifically, the indoor heat exchanger 100 in this embodiment is composed of 2 heat exchangers connected in series, and the heat exchangers correspond to: the first heat exchanger 110 and the second heat exchanger 120 are, in particular,
a first heat exchanger 110 including a first heat exchange pipe 111;
the second heat exchanger 120 comprises a second heat exchange tube 121, and the diameter of the second heat exchange tube 121 is larger than that of the first heat exchange tube 111;
a first refrigerant flow channel formed inside the first heat exchanger 110 and the second heat exchanger 120, which enables a refrigerant flowing out of a liquid pipe side of the outdoor heat exchanger to sequentially flow through the second heat exchange pipe 121 and the first heat exchange pipe 111 during conduction and cooling operation to realize rapid cooling;
when conducting and heating operation is performed, the refrigerant flowing out of the compressor flows through the first heat exchange tube 111 and the second heat exchange tube 121 in sequence to realize rapid heating;
the first control valve 200 is disposed on the first refrigerant flow channel and used for controlling the on-off of the first refrigerant flow channel, that is, in this embodiment, the on-off of the first refrigerant flow channel can be controlled by the first control valve 200, when summer is hot and rapid refrigeration of an indoor unit of an air conditioner is required, the conduction of the first refrigerant flow channel can be correspondingly controlled by the first control valve 200, at this time, a liquid refrigerant flowing out of an outdoor heat exchanger can sequentially flow through the second heat exchange tube 121 and the second heat exchange tube 121, the liquid refrigerant firstly passes through the second heat exchange tube 121 for heat exchange, and then passes through the first heat exchange tube 111 for heat exchange, because the tube diameter of the second heat exchange tube 121 is large, the tube diameter of the first heat exchange tube 111 is small, when the refrigerant flows into the first heat exchange tube 111 from the second heat exchange tube 121, it is equivalent to instant throttling, so that the refrigerant is instantly filled in the first heat exchange tube 111, therefore, the heat exchange performance with air is good, and meanwhile, because the diameter of the first heat exchange tube 111 is small, the resistance applied to the refrigerant when the refrigerant flows in the first heat exchange tube is large, so that the flowing speed of the refrigerant in the first heat exchanger 110 is reduced; the residence time of the refrigerant in the first heat exchange tube 111 is prolonged, so that the refrigerant can fully exchange heat with air, the temperature of the indoor air is rapidly reduced, and the effect of rapid refrigeration is achieved.
When the air-conditioning indoor unit needs to rapidly heat, the conduction of a first refrigerant flow channel can be correspondingly controlled through a first electric control valve, at the moment, the whole air-conditioning indoor unit performs heating operation, the refrigerant discharged from a compressor can enter the indoor heat exchanger 100, at the moment, the refrigerant can sequentially flow through the first heat exchange tube 111 and the second heat exchange tube 121 and then flow out of the indoor heat exchanger 100, the refrigerant discharged from the compressor is a gaseous refrigerant, the refrigerant firstly enters the first heat exchange tube 111 and then enters the second heat exchange tube 121 to realize heat exchange with air, because the refrigerant discharged from the compressor is the gaseous refrigerant, the diameter of the first heat exchange tube 111 is small, the refrigerant can rapidly fill the whole first heat exchange tube 111 after entering the first heat exchange tube 111, the pipe wall contact area with the first heat exchange tube 111 is large, the pipe wall contact area with the pipe wall is large, the heat exchange opportunities are many, the heat exchange with the air is good, and then the refrigerant enters the second heat exchange tube 121 to, from the first heat exchange tube 111 to the second heat exchange tube 121, the corresponding tube diameter changes to a process of increasing the volume, so that the temperature of the refrigerant in the tubes is increased by 3 to 5 degrees suddenly, and the refrigerant can continuously replace heat with air, thereby achieving a good effect of quick heating and realizing quick heating.
When the air conditioner is in the energy-saving sleep mode, the indoor unit of the air conditioner can be controlled by the control unit, the corresponding air speed is low, at the moment, the refrigerant firstly passes through the first heat exchanger 110 of the first heat exchange tube 111, the pipe diameter of the first heat exchanger 110 is small, the refrigerant flows slowly in the inner part and is quickly filled in the tube, the contact area with the tube wall is large, the heat exchange chance and the heat exchange time are large, the refrigerant is in a low-wind state, the heat in the refrigerant can be replaced by air as much as possible, and when the refrigerant passes through the first heat exchanger 110 and then reaches the second heat exchanger 120 of the second heat exchange tube 121, the refrigerant is insufficient in strength and slow in flow speed, heat exchange is continued in the second heat exchanger 120, the air outlet temperature is high, at the moment, the heat exchange efficiency is highest, the heat.
The second refrigerant flow channel is formed in the first heat exchanger 110 and the second heat exchanger 120, and can enable the refrigerant flowing out of the liquid tube side of the outdoor heat exchanger to sequentially flow through the first heat exchange tube 111 and the second heat exchange tube 121 during conduction and refrigeration operation so as to realize refrigeration or dehumidification;
when conducting and heating operation is performed, the refrigerant flowing out of the exhaust port side of the compressor sequentially flows through the second heat exchange tube 121 and the first heat exchange tube 111 to realize heating;
and a second control valve 300 disposed on the second refrigerant flow channel for controlling on/off of the first refrigerant flow channel.
When the air conditioner indoor unit needs to refrigerate in a common refrigeration mode, the second refrigerant flow channel can be controlled to be conducted through the second control valve 300 correspondingly, then the refrigerant flowing out of the outdoor heat exchanger through the liquid detection side sequentially flows through the first heat exchange tube 111 and the second heat exchange tube 121 to exchange heat with air sequentially, the resistance of the liquid refrigerant flowing through the first heat exchange tube 111 is large due to the small pipe diameter of the first heat exchange tube, the heat exchange capacity of the refrigerant is greatly reduced when the liquid refrigerant flows into the second heat exchange tube 121, and the refrigeration mode is equivalent to a common refrigeration mode corresponding to a heat exchanger with the diameter of the first heat exchange tube 111 for refrigeration.
When dehumidification is needed, the corresponding air-conditioning indoor unit is controlled to run in low wind, and the refrigerant sequentially flows through the first heat exchange tube 111 and the second heat exchange tube 121, when the indoor heat exchanger 100 in the embodiment dehumidifies, the refrigerant sequentially flows through the first heat exchange tube 111 and the second heat exchange tube 121, the heat exchange effect with the outside air is good when the refrigerant flows through the first heat exchange tube 111, the temperature drop speed is high, when the refrigerant flows through the second heat exchange tube 121, the temperature of the refrigerant is slightly increased due to the sudden increase of the tube diameter, the indoor temperature drop speed is slowed down, the indoor temperature drop is moderate, and the problem that the user experience effect is poor due to the fact that the refrigerant directly drops to a low temperature in the dehumidification mode can be solved.
When heating is needed, the gas-side refrigerant discharged from the compressor can sequentially flow through the second heat exchange tube 121 and the first heat exchange tube 111, and due to the fact that the flow rate of the gaseous refrigerant is high, when the gaseous refrigerant passes through the second heat exchange tube 121 with the large tube diameter, the gaseous refrigerant can rapidly pass through the second heat exchange tube 121, the residence time of the refrigerant in the second heat exchange tube 121 is short, heat exchange with air is insufficient, at the moment, the heat exchanger is equivalent to a heat exchanger only adopting the first heat exchange tube 111, and the heat exchanger is equivalent to an ordinary heating effect.
The air-conditioning indoor unit in the embodiment further comprises a controller, and the controller can be used for controlling the first control valve 200 and the second control valve 300, so that the 2 refrigerant channels are alternately conducted, switching among a plurality of modes such as rapid refrigeration, rapid heating, common refrigeration, dehumidification, common heating and energy-saving sleep is realized, and the use requirements for user diversity are met.
Preferably, the second heat exchanger 120 in the present embodiment includes a plurality of second heat exchange tubes 121, and the plurality of second heat exchange tubes 121 are sequentially connected in series to form a second heat exchange tube set.
The first heat exchanger 110 includes a plurality of first heat exchange tube sets 112, each first heat exchange tube set 112 is formed by sequentially connecting a plurality of first heat exchange tubes 111 in series, and the plurality of first heat exchange tube sets 112 are connected in parallel and then are connected in series with a second heat exchange tube set of the second heat exchanger 120, which is formed by connecting a plurality of second heat exchange tubes 121 in series.
That is, the refrigerant may pass through the second heat exchange tube set during inflow/outflow, and then be divided into the first heat exchange tube sets 112, and during outflow/inflow, the refrigerant also flows into the second heat exchange tube set after the outflow/inflow of the plurality of first heat exchange tube sets 112 are collected.
Preferably, the number of the first control valves 200 in this embodiment is 2, and one of the first control valves is located on the liquid pipe section between the main liquid pipe port 510 and the refrigerant port 700 of the second heat exchanger; and the other on the gas tube segment between the main gas tube port 520 and the first heat exchanger coolant port 700.
The number of the second control valves 300 is 2, one of which is located on a liquid pipe section between the main liquid pipe port 510 and the first heat exchanger refrigerant port 700, and the other is located on a gas pipe section between the main gas pipe port 520 and the refrigerant port 700.
Specifically, the embodiment further includes a main liquid pipe and a main gas pipe, the main liquid pipe includes a main liquid pipe opening 510, the main gas pipe includes a main gas pipe opening 520, the liquid refrigerant flowing from the outdoor heat exchanger flows to the main liquid pipe, then a corresponding flow path is selected according to the opening or closing condition of the first control valve 200 and the second control valve 300, when the first control valve 200 is opened, the second control valve 300 is closed and the whole air conditioner is refrigerating, the first refrigerant flow path is conducted, the liquid refrigerant enters the second heat exchanger 120 through the main liquid pipe opening 510 and the first control valve 200, enters the first heat exchanger 110 connected in series with the second heat exchanger 120 after flowing into the second heat exchanger 120, then flows out from the main gas pipe opening 520 after flowing out from the first heat exchanger refrigerant opening 700 and the other first control valve 200, and reversely flows along the flow path when heating;
when the second control valve 300 is opened, the first control valve 200 is closed, and the whole air conditioner performs refrigeration, the second refrigerant channel is conducted, liquid refrigerant enters the refrigerant port 700 of the first heat exchanger through the second control valve 300 through the main liquid pipe port 510, then flows into the first heat exchanger 110, enters the second heat exchanger 120 connected in series with the first heat exchanger 110 after flowing into the first heat exchanger 110, then flows out from the refrigerant port 700, passes through the other second control valve 300, and flows out from the main gas pipe port 520, and when heating is performed, the refrigerant reversely flows along the channel.
Example two:
the embodiment provides an indoor unit of an air conditioner, and referring to fig. 5, the indoor unit includes an indoor heat exchanger 100, the indoor heat exchanger 100 includes a first heat exchanger 110 and a second heat exchanger 120 in the first embodiment, and further includes a third heat exchanger 400, which is connected in series with the first heat exchanger 110 and includes a third heat exchange tube, a diameter of the third heat exchange tube is greater than a diameter of the first heat exchange tube 111, preferably, a diameter of the third heat exchange tube is equal to a diameter of the second heat exchange tube 121 in the first embodiment, when the indoor unit is arranged in the first embodiment, the diameter of the first heat exchange tube 111 is set to be 5mm, and the diameter of the second heat exchange tube 121 and the diameter of the third heat exchange tube are both 7.
When the indoor heat exchanger 100 is formed by connecting 3 heat exchangers in series, the corresponding first refrigerant flow channels are configured as follows: the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger sequentially flows through the second heat exchange pipe 121 and the first heat exchange pipe 111 and then flows through the third heat exchange pipe to realize rapid refrigeration during conduction and refrigeration operation, and is formed in the first heat exchanger 110, the second heat exchanger 120 and the third heat exchanger 400;
when the compressor is conducted and performs heating operation, the refrigerant flowing out of the exhaust port side of the compressor flows through the third heat exchange tube, the first heat exchange tube 111 and the second heat exchange tube 121 in sequence to realize rapid heating.
The first control valve 200 is used for controlling the connection or disconnection of the first refrigerant channel.
The liquid refrigerant flows from the liquid pipe, passes through the second heat exchange pipe 121 and the first heat exchange pipe 111, then flows through the third heat exchange pipe, the second heat exchange pipe 121 exchanges heat with air, passes through the first heat exchange pipe 111 heat exchanger, is instantly throttled to fill the pipe wall of the first heat exchanger 110, increases the contact area of the refrigerant and the pipe wall to achieve a good temperature reduction effect, and finally passes through the heat exchanger of the third heat exchange pipe to further replace heat in the air into the refrigerant.
Similarly, when heating, the gaseous refrigerant flows from the air pipe, passes through the third heat exchange pipe and reaches the first heat exchange pipe 111, the first heat exchange pipe 111 has a small pipe diameter and is filled with full pipes quickly, the contact area with the pipe wall is large, the heat exchange opportunities are more, and the heat exchanger of the second heat exchange pipe 121 at the back continuously exchanges heat to achieve a better effect.
The second refrigerant channel is configured as follows: the first heat exchanger 110, the second heat exchanger 120 and the third heat exchanger 400 are formed therein, and the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger can sequentially flow through the third heat exchange pipe, the first heat exchange pipe 111 and the second heat exchange pipe 121 during conduction and refrigeration operation to realize refrigeration or dehumidification;
when the common refrigeration operation is needed, the conduction of the second refrigerant flow channel can be controlled, the refrigerant firstly flows through the third heat exchanger 400 of the third heat exchange tube and then flows to the first heat exchanger 110 of the first heat exchange tube 111 to exchange heat with air, because the heat exchanger resistance of the first heat exchange tube 111 is large, when the refrigerant flows to the second heat exchanger 120 of the second heat exchange tube 121, the heat exchange capacity of the refrigerant is greatly reduced, which is equivalent to that only the first heat exchanger 110 of the first heat exchange tube 111 can only realize the common refrigeration.
When ordinary heating is needed, the second refrigerant flow channel is controlled to be conducted, and the refrigerant flows through the second heat exchange tube 121, the first heat exchange tube 111 and the third heat exchange tube from the air pipe side of the compressor in sequence to realize heating. Because the heat exchanger resistance of the first heat exchange tube 111 is relatively large, when the refrigerant flows to the heat exchanger of the third heat exchange tube, the heat exchange capacity of the refrigerant is greatly reduced, and the difference with an air conditioner product of the heat exchanger only with the first heat exchange tube 111 is not large.
And a second control valve 300 for controlling the connection or disconnection of the second refrigerant channel.
The first control valve 200 and the second control valve 300 may be solenoid valves.
Further, the third heat exchanger 400 includes a plurality of third heat exchange tubes, the plurality of third heat exchange tubes are sequentially connected in series to form a third heat exchange tube set, and the third heat exchange tube set is connected in series with the first heat exchange tube 111 set.
Preferably, the indoor heat exchanger 100 in this embodiment has a V-shape, a U-shape, or a C-shape.
Preferably, the first heat exchanger 110 is located at an inner row of the indoor heat exchanger 100, and the second heat exchanger 120 is located at an outer row of the indoor heat exchanger 100 near a windward side of the indoor heat exchanger 100.
Further, the number of rows of the second heat exchanger 120 is smaller than the number of rows of the first heat exchanger 110, and preferably, the number of rows of the first heat exchanger 110 is multiple, so that the copper pipes of the first heat exchanger 110 are arranged densely, the air resistance is large when the refrigerant flows into the interior, the flow speed is slow, the residence time of the refrigerant in the first copper pipe of the first heat exchanger 110 is long, the refrigerant can exchange heat with air sufficiently, and the refrigerant can achieve the effect of rapid cooling or rapid heating rapidly in a rapid cooling or rapid heating mode.
The indoor heat exchanger 100 in the embodiment can enable the indoor machine of the air conditioner to realize quick refrigeration and quick heating, shortens the time required by the refrigeration and heating to reach the set temperature, and has good refrigeration and heating effects;
when the whole air conditioner is in a low-wind operation mode of energy-saving sleep, the air conditioner can fully exchange heat with air, the heat exchange effect is good, and energy conservation is realized.
In addition, the indoor heat exchanger 100 in this embodiment may also be used for slowly decreasing the indoor temperature without rapidly decreasing the indoor temperature during low-temperature dehumidification, so that the user experience is good, and the comfort of the user is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The utility model provides an indoor set of air conditioning, the inside indoor set of air conditioning is provided with indoor heat exchanger, its characterized in that, indoor heat exchanger is including:
the first heat exchanger comprises a first heat exchange tube;
the second heat exchanger is connected with the first heat exchanger in series and comprises a second heat exchange tube, and the diameter of the second heat exchange tube is larger than that of the first heat exchange tube;
the first refrigerant flow channel is formed in the first heat exchanger and the second heat exchanger and can enable the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger to sequentially flow through the second heat exchange pipe and the first heat exchange pipe so as to realize rapid refrigeration when the first refrigerant flow channel is conducted;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor sequentially flows through the first heat exchange tube and the second heat exchange tube to realize rapid heating;
the first control valve is arranged on the first refrigerant flow channel and used for controlling the on-off of the first refrigerant flow channel;
the second refrigerant flow channel is formed in the first heat exchanger and the second heat exchanger and can enable the refrigerant flowing out of the liquid tube side of the outdoor heat exchanger to sequentially flow through the first heat exchange tube and the second heat exchange tube so as to realize refrigeration or dehumidification when the second refrigerant flow channel is conducted;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor sequentially flows through the second heat exchange tube and the first heat exchange tube to realize heating;
and the second control valve is arranged on the second refrigerant flow channel and used for controlling the on-off of the second refrigerant flow channel.
2. An indoor unit of an air conditioner as claimed in claim 1, further comprising a third heat exchanger connected in series with the first heat exchanger and including a third heat exchange pipe, wherein the diameter of the third heat exchange pipe is larger than that of the first heat exchange pipe;
the first refrigerant channel is configured to: the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger sequentially flows through the second heat exchange pipe and the first heat exchange pipe and then flows through the third heat exchange pipe so as to realize quick refrigeration;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor flows through the third heat exchange tube, the first heat exchange tube and the second heat exchange tube in sequence to realize rapid heating.
3. An indoor unit of an air conditioner according to claim 2,
the second refrigerant channel is configured as follows: the refrigerant flowing out of the liquid pipe side of the outdoor heat exchanger can sequentially flow through the third heat exchange pipe, the first heat exchange pipe and the second heat exchange pipe to realize refrigeration when the refrigerant is conducted;
when the heat exchanger is conducted, the refrigerant flowing out of the exhaust port side of the compressor flows through the second heat exchange tube, the first heat exchange tube and the third heat exchange tube in sequence to realize rapid heating.
4. An indoor unit of an air conditioner according to claim 2, wherein the second heat exchanger includes a plurality of second heat exchange pipes, and the plurality of second heat exchange pipes are connected in series in turn to form a second heat exchange pipe group.
5. An indoor unit of an air conditioner according to claim 4,
the first heat exchanger comprises a plurality of groups of first heat exchange tube sets, each group of first heat exchange tube sets is formed by sequentially connecting a plurality of first heat exchange tubes in series, and the plurality of groups of first heat exchange tube sets are connected in parallel and then combined into one path and connected in series with the second heat exchange tube set of the second heat exchanger.
6. An indoor unit of an air conditioner according to claim 4, wherein the third heat exchanger includes a plurality of third heat exchange pipes, the plurality of third heat exchange pipes are sequentially connected in series to form a third heat exchange pipe group, and the third heat exchange pipe group is connected in series with the first heat exchange pipe group.
7. An indoor unit of an air conditioner according to claim 1, wherein the first control valve is provided with 2, one of which is located on the liquid pipe section between the main liquid pipe opening and the refrigerant opening of the second heat exchanger; the other is positioned on the air pipe section between the main air pipe opening and the refrigerant opening of the first heat exchanger;
and 2 second control valves are arranged, wherein one of the second control valves is positioned on a liquid pipe section between the main liquid pipe opening and the refrigerant opening of the first heat exchanger, and the other second control valve is positioned on a gas pipe section between the main gas pipe opening and the refrigerant opening of the second heat exchanger.
8. An indoor unit of an air conditioner according to claim 1, wherein the indoor heat exchanger has a V-shape, a U-shape or a C-shape.
9. An indoor unit of an air conditioner according to claim 1, wherein the first heat exchanger is located at an inner row of the indoor heat exchanger, and the second heat exchanger is located at an outer row of the indoor heat exchanger near a windward side of the indoor heat exchanger.
10. An indoor unit of an air conditioner according to claim 1, wherein the number of rows of the second heat exchanger is smaller than the number of rows of the first heat exchanger.
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| CN111023312B (en) | 2021-07-30 |
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