CN211903076U - Indoor unit and air conditioner - Google Patents
Indoor unit and air conditioner Download PDFInfo
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- CN211903076U CN211903076U CN202020332204.6U CN202020332204U CN211903076U CN 211903076 U CN211903076 U CN 211903076U CN 202020332204 U CN202020332204 U CN 202020332204U CN 211903076 U CN211903076 U CN 211903076U
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Abstract
The application discloses indoor unit and air conditioner relates to air treatment equipment technical field for solve among the prior art problem that the indoor unit produces the condensation easily. A first air duct which communicates the first indoor air return opening, the fresh air opening and the indoor air outlet and a second air duct which communicates the second indoor air return opening and the outdoor air outlet are formed in a shell of the indoor unit; the heat exchanger is arranged in the first air duct; the partition is arranged in the first air duct, a first heat exchange section in the heat exchanger is arranged close to the first indoor air return opening, a second heat exchange section in the heat exchanger is arranged close to the fresh air opening, and the partition separates the air duct between the first indoor air return opening and the first heat exchange section and the air duct between the fresh air opening and the second heat exchange section; the main liquid pipe is used for communicating with one of an inlet and an outlet of a refrigerant pipeline in the outdoor unit; the main gas pipe is used for being communicated with the other one of the inlet and the outlet of the refrigerant pipeline in the outdoor unit, and the first heat exchange section and the second heat exchange section are connected between the main liquid pipe and the main gas pipe in parallel.
Description
Technical Field
The application relates to the technical field of air conditioning equipment, in particular to an indoor unit and an air conditioner.
Background
Along with the continuous improvement of air conditioning technology, not only can realize the regulation of room air temperature among the current air conditioner, introduce new trend moreover and carry out the function that purifies to the room air.
Fig. 1 shows a schematic structural diagram of an existing air-conditioning indoor unit, the indoor unit includes a casing 01, a clean air return inlet 011, a dirty air inlet 012, a clean air supply outlet 013, a fresh air inlet 014 and an air outlet 015 are provided on the casing 01, an air duct is formed in the casing 01, a heat exchange coil 02, a circulating fan 03, an air energy heat exchanger 04 and an air exhaust fan 05 are installed in the air duct, and arrows of different types in fig. 1 are respectively used for indicating the flowing directions of fresh air intake, indoor clean air return, indoor air supply and indoor dirty air return. Wherein "→" indicates a flow direction of the fresh air intake;
indicating the flow direction of indoor clean air;
indicating indoor deliveryThe direction of wind flow;
indicating the direction of flow of dirty air in the room.
Because the existing indoor return air and the outdoor fresh air are mixed firstly and then enter the heat exchange coil for heat exchange, taking the working condition in summer as an example, the temperature of the indoor return air is lower, the temperature of the outdoor fresh air is higher, although the temperature of the fresh air can be reduced after passing through the air energy heat exchanger, the fresh air is limited by the heat recovery efficiency of the air energy heat exchanger, the temperature after heat exchange is higher than the temperature of the indoor return air inevitably, and the temperatures of the indoor return air and the outdoor fresh air are different, so condensation is easily formed on the wall surface of a cavity body near the air inlet side of.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an indoor unit including: the air conditioner comprises a shell, a first indoor air return inlet, a second indoor air return inlet, an indoor air outlet, a fresh air inlet and an outdoor air outlet are formed in the shell, a first air duct and a second air duct are formed in the shell, the first air duct is used for communicating the first indoor air return inlet, the fresh air inlet and the indoor air outlet, and the second air duct is used for communicating the second indoor air return inlet and the outdoor air outlet; the first air duct can guide indoor return air into the shell through the first indoor return air inlet and outdoor fresh air into the shell through the fresh air inlet, and finally the indoor return air is guided out from the indoor air outlet, and the second air duct can discharge the indoor return air through the second indoor return air inlet and the outdoor air outlet, so that fresh air introduction and indoor air discharge are realized.
In some embodiments of the present application, the air conditioner further comprises a heat exchanger disposed in the first air duct, and the heat exchanger can exchange heat with indoor return air and outdoor fresh air simultaneously.
In some embodiments of this application, still including being located the heat exchanger with first fan between the indoor air outlet, first fan is leading-in with the room air through first indoor return air inlet, and/or with outdoor new trend leading-in through the new wind gap, and the back of exchanging heat with the heat exchanger again, derives from the indoor air outlet again, can drive outdoor new trend and room air simultaneously through a fan and carry out the circulation flow, on the basis of the inner loop mode, the new trend mode and the mixed wind mode of realizing indoor set, air conditioner structure is simpler.
In some embodiments of the present application, the air conditioner further comprises a second fan disposed in the second air duct, the second fan facilitating the discharge of indoor air from the outdoor air outlet.
In some embodiments of this application, still including installing separator in the first wind channel, the separator is installed in the first wind channel, the heat exchanger is including first heat transfer section and the second heat transfer section that connects in parallel each other, first heat transfer section is close to first indoor return air inlet sets up, the second heat transfer section is close to the fresh air inlet sets up, the separator will first indoor return air inlet with wind channel between the windward side of first heat transfer section with the fresh air inlet with wind channel between the windward side of second heat transfer section separates, and indoor return air and outdoor new trend get into the casing after, separate by the separator, respectively with the different section heat transfer of heat exchanger after the remixing, indoor return air and outdoor new trend difference in temperature after the heat transfer are less, are difficult for producing the condensation.
In some embodiments of the present application, a liquid header pipe is further included and is configured to communicate with one of an inlet and an outlet of a refrigerant pipe in the outdoor unit, and the liquid header pipe is configured to guide a liquid refrigerant into the first heat exchange section and the second heat exchange section or to guide a discharge of the refrigerant condensed in the first heat exchange section and the second heat exchange section.
In some embodiments of the present application, the heat exchanger further includes a manifold for communicating with the other of the inlet and the outlet of the refrigerant pipe in the outdoor unit, the first heat exchange section and the second heat exchange section are connected in parallel between the manifold pipe and the manifold pipe, and the manifold pipe is capable of guiding a gaseous refrigerant to enter the first heat exchange section and the first heat exchange section, or guiding the discharge of the refrigerant evaporated in the first heat exchange section and the second heat exchange section.
In some embodiments of the present application, the heat exchanger further includes a first throttling device, the first throttling device is disposed on a parallel branch where the first heat exchange section is located, and is located on a pipeline between the main pipe and the first heat exchange section; the second throttling device is arranged on a parallel branch where the second heat exchange section is located and on a pipeline between the main liquid pipe and the second heat exchange section, and the flow of the refrigerant passing through the first throttling device can be limited through the first throttling device, namely the flow of the refrigerant entering the first heat exchange section or flowing out of the first heat exchange section can be limited; the flow of refrigerant through the second restriction device, i.e. into or out of the second heat exchange section, can be restricted by the second restriction device.
In some embodiments of the present application, the first throttling device and the second throttling device are both capillary tubes, the tube diameters of the first throttling device and the second throttling device are equal, and the length L of the first throttling device is equal1And the length L of the second restriction2Satisfies the following conditions: l is2＝(1.5～2)L1The refrigerant flow entering the first heat exchange section and the refrigerant flow entering the second heat exchange section are both proper, so that the air temperature of indoor return air entering the first indoor return air inlet after heat exchange through the first heat exchange section is consistent with the air temperature of outdoor fresh air entering the fresh air inlet after heat exchange through the second heat exchange section, condensation caused by uneven heat exchange of the two heat exchange sections of the heat exchanger is avoided, and the using effect of a user is improved.
In some embodiments of the present application, the heat exchange area S of the first heat exchange section1The heat exchange area S with the second heat exchange section2Satisfies the following conditions: s1/S2＝Q1×|T3-T1|/Q2×|T3-T2L, wherein Q1The air inlet quantity of the fresh air inlet, T1For the temperature of the air entering from the fresh air inlet before the heat exchanger, Q2Is the return air quantity of the first indoor return air inlet, T2Is the return air temperature T at the first indoor return air inlet3The target temperature of the fresh air and the indoor return air after heat exchange of the heat exchanger is achieved, so that the first heat exchange section is enabled to be arrangedHeat exchange area S1Heat exchange area S with the second heat exchange section2Heat exchange capacity and fresh air quantity Q1The temperature T of the air entering from the fresh air inlet before the heat exchanger1And the return air quantity Q of the first indoor return air inlet2The return air temperature T at the first indoor return air inlet2And the target temperature T of the fresh air and the indoor return air after heat exchange of the heat exchanger3The heat exchanger is more matched, and the heat exchange efficiency of the heat exchanger is further improved.
In some embodiments of the present application, further comprising: the air guide structure, the air guide structure with first wind channel the second wind channel all communicates, just the air guide structure with the intercommunication department in first wind channel is close to indoor air outlet, the air guide structure with the intercommunication department in second wind channel is close to the indoor return air inlet of second, and the return air accessible air guide structure of the indoor return air inlet of second gets into in the first wind channel, for example, simultaneously the air inlet through first indoor return air inlet and the indoor return air inlet of second, can increase the intake of indoor set.
In some embodiments of the present application, the indoor unit further includes: the filtering device is arranged in the air guide structure, and the first fan is positioned between the communication position of the air guide structure and the first air channel and the indoor air outlet; and/or the second fan is positioned between the communication position of the air guide structure and the second air duct and the second indoor return air inlet; the first fan, the second fan, or the first fan and the second fan promote indoor return air to be guided into the shell through the second indoor return air inlet, filtered by the filtering device in the air guide structure and then discharged from the indoor air outlet, and the indoor unit can operate in a purification mode.
In some embodiments of the present application, further comprising: the full heat exchanger is internally provided with a first heat exchange flow channel and a second heat exchange flow channel which exchange heat with each other, the first heat exchange flow channel is connected in the first air channel and is positioned between the fresh air inlet and a second heat exchange section of the heat exchanger, and the second heat exchange flow channel is connected in the second air channel; when the outdoor fresh air passes through the first heat exchange flow channel of the total heat exchanger, the outdoor fresh air can exchange heat with the indoor return air entering the second heat exchange flow channel, so that the heat recovery of the indoor return air is realized, the precooling or preheating of the fresh air is realized, and the heat exchange effect is improved.
In some embodiments of the present application, further comprising: further comprising: the one-way air-permeable membrane is arranged in the second air duct and is positioned between the communication part of the second air duct and the air guide structure and the outdoor air outlet, and the one-way air-permeable membrane can allow air flowing from the second indoor air return inlet to the outdoor air outlet to pass through and form resistance to air flowing from the outdoor air outlet to the second indoor air return inlet; when the indoor unit operates in an internal circulation mode or a purification mode (the air guide structure is in a communicated state), the one-way breathable film can prevent outdoor air from entering the indoor space due to the action of the first fan or the second fan or the first fan and the second fan, and is cheap and low in cost.
In some embodiments of the present application, the air conditioner further comprises a first air valve installed at the first indoor return air inlet, and the first air valve is used for controlling the opening or closing of the first indoor return air inlet.
In some embodiments of the present application, the air conditioner further comprises a second air valve installed at the fresh air opening, and the second air valve is used for controlling the opening or closing of the fresh air opening.
In some embodiments of the present application, the air guiding structure further comprises a third air valve installed in the air guiding structure, and the third air valve is used for controlling whether the air guiding structure is in a communication state or not.
In some embodiments of the present application, the air conditioner further includes a fourth air valve, the partition is provided with a vent hole for communicating the fresh air inlet and the first indoor return air inlet, and the fourth air valve is installed at the vent hole. When the indoor unit is in the air mixing mode, the fourth air valve is closed; when the indoor unit is in an inner circulation mode, the fourth air valve is opened, part of return air of the first indoor return air inlet can exchange heat with the second heat exchange section of the heat exchanger through the opening of the fourth air valve, the other part of return air of the first indoor return air inlet directly exchanges heat with the first heat exchange section of the heat exchanger, the first heat exchange section and the second heat exchange section of the heat exchanger can exchange heat with the return air of the first indoor return air inlet simultaneously, the return air of the first indoor return air inlet and the heat exchange area of the heat exchanger are increased, and then the heat exchange efficiency of the air conditioner in the inner circulation mode is improved.
In some embodiments of the present application, the first fan and the second fan are both centrifugal fans.
In some embodiments of the present application, the heat exchanger is a coil heat exchanger.
In a second aspect, an embodiment of the present application further provides an air conditioner, including the indoor unit according to the foregoing embodiment. Because the indoor unit installed in the air conditioner has the same structure as the indoor unit, the air conditioner can obtain the same technical effect, and the description is omitted here.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an indoor unit of an air conditioner in the prior art;
fig. 2 is a schematic structural diagram of an indoor unit in an embodiment of the present application;
FIG. 3 is a perspective view of the first and second heat exchange stages in an embodiment of the present application;
FIG. 4 is a front view of the first and second heat exchange stages in an embodiment of the present application;
FIG. 5 is a rear view of the first and second heat exchange stages in an embodiment of the present application;
FIG. 6 is a left side view of the first and second heat exchange sections in an embodiment of the present application;
FIG. 7 is a right side view of the first and second heat exchange stages in an embodiment of the present application;
FIG. 8 is a top view of the first and second heat exchange stages in an embodiment of the present application;
FIG. 9 is a bottom view of the first and second heat exchange stages in an embodiment of the present application;
fig. 10 is a schematic structural view of an indoor unit in an air mixing mode according to an embodiment of the present application;
fig. 11 is a schematic structural view of an indoor unit in a fresh air mode in the embodiment of the present application;
fig. 12 is a schematic structural view of an indoor unit in the embodiment of the present application when the indoor unit is in the purge mode;
fig. 13 is a perspective view of an indoor unit in the embodiment of the present application;
fig. 14 is a rear view of an indoor unit in the embodiment of the present application;
fig. 15 is a left side view of an indoor unit in the embodiment of the present application;
fig. 16 is a right side view of the indoor unit in the embodiment of the present application;
fig. 17 is a plan view of an indoor unit in the embodiment of the present application;
fig. 18 is a bottom view of an indoor unit in the embodiment of the present application;
fig. 19 is a schematic structural view illustrating the indoor unit in the inner circulation mode and the fourth air damper being closed according to the embodiment of the present application;
fig. 20 is a schematic structural view illustrating the indoor unit in the internal circulation mode and the fourth air damper being opened according to the embodiment of the present invention.
Reference numerals:
1-a shell; 110-a first indoor return air inlet; 111-a second indoor return air inlet; 112-indoor air outlet; 113-fresh air port; 114-outdoor air outlet; 2-a heat exchanger; 21-a first heat exchange section; 22-a second heat exchange section; 3-a first fan; 4-a second fan; 5-a separator; 200-a main liquid pipe; 201-main gas pipe; 6-a filtration device; 7-total heat exchanger; 8-a one-way breathable film; 9-a first air valve; 10-a second air valve; 11-a third air valve; 51-fourth air valve.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to 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; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description of the present application, "and/or" is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit. The outdoor unit and the indoor unit of the air conditioner are communicated through a pipeline.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
Referring to fig. 2 to 9, in some embodiments of the present application, the air conditioner includes a housing 1, a heat exchanger 2, a first fan 3, a second fan 4, and a partition 5, wherein the housing 1 is provided with a first indoor air return 110, a second indoor air return 111, an indoor air outlet 112, a fresh air inlet 113, and an outdoor air outlet 114, a first air duct and a second air duct are formed in the housing 1, the first air duct communicates the first indoor air return 110, the fresh air inlet 113, and the indoor air outlet 112, and the second air duct communicates the second indoor air return 111 with the indoor air outlet; the heat exchanger 2 is arranged in the first air duct, the first fan 3 is positioned between the heat exchanger 2 and the indoor air outlet 112, and the second fan 4 is arranged in the second air duct; the partition 5 is installed in the first air duct, the heat exchanger 2 is composed of a first heat exchange section 21 and a second heat exchange section 22 which are spliced with each other, the first heat exchange section 21 is arranged close to the first indoor air return opening 110, the second heat exchange section 22 is arranged close to the fresh air opening 113, and the partition 5 partitions the air duct between the first indoor air return opening 110 and the windward side of the first heat exchange section 21 and the air duct between the fresh air opening 113 and the windward side of the second heat exchange section 22; a main liquid pipe 200, the main liquid pipe 200 being adapted to communicate with one of an inlet and an outlet of a refrigerant pipe in the outdoor unit; a main gas pipe 201, the main gas pipe 201 is used for communicating with the other of the inlet and the outlet of the refrigerant pipeline in the outdoor unit, and the first heat exchange section 21 and the second heat exchange section 22 are connected in parallel between the main liquid pipe 200 and the main gas pipe 201.
When the indoor unit in the application operates in the air mixing mode, part of indoor return air enters the first air channel through the first indoor return air inlet 110, outdoor fresh air enters the second air channel through the fresh air inlet 113, due to the blocking of the separator 5, the indoor return air exchanges heat with the first heat exchange section 21 of the heat exchanger 2, the outdoor fresh air exchanges heat with the second heat exchange section 22 of the heat exchanger 2, and then is mixed and is led into the room from the indoor air outlet 112 under the action of the first fan 3, part of the indoor return air enters the second air channel through the second indoor return air inlet 111, and is led out from the outdoor air outlet 114 under the action of the second fan 4, as shown in fig. 10, because the fresh air in front of the heat exchanger 2 is not in contact with the indoor return air, condensation is not easy to generate, and the temperature difference between the indoor return air and the outdoor fresh air after exchanging heat with the heat exchanger 2 is small, the condensation is not easy to.
When the heat exchanger 2 is used as a condenser, the air conditioner is used as a heater in a heating mode, refrigerant compressed by a compressor of the outdoor unit is discharged from an outlet of a refrigerant pipeline of the outdoor unit, at this time, the main gas pipe 201 is used for being communicated with an outlet of the refrigerant pipeline of the outdoor unit, gas refrigerant discharged from the refrigerant pipeline of the outdoor unit is introduced into the first heat exchange section 21 and the second heat exchange section 22, the gas refrigerant is condensed and released heat in the first heat exchange section 21 and the second heat exchange section 22, heat is released to the surrounding environment, and a heating effect is achieved, and then the gas refrigerant returns to an inlet of the refrigerant pipeline of the outdoor unit through the main liquid pipe 200.
When the heat exchanger 2 is used as an evaporator, the air conditioner is used as a cooler in a cooling mode, condensed refrigerant is discharged from a refrigerant outlet of the outdoor unit, and at this time, the liquid manifold 200 is used to communicate with an outlet of a refrigerant pipe in the outdoor unit, so that the condensed refrigerant is introduced into the first heat exchange section 21 and the second heat exchange section 22 of the heat exchanger 2, and the refrigerant is evaporated in the first heat exchange section 21 and the second heat exchange section 22, absorbs heat from the surrounding environment, thereby achieving a cooling effect, and then returns to an inlet of the refrigerant pipe in the outdoor unit through the gas manifold 201.
When the indoor unit in the present application operates in the fresh air mode, outdoor fresh air enters the first air duct through the fresh air inlet 113 to exchange heat with the second heat exchange section 22 of the heat exchanger 2, and then is guided out from the indoor air outlet 112 under the action of the first fan 3, and indoor return air enters the second air duct through the second indoor return air inlet 111 and is guided out from the outdoor air outlet 114 under the action of the second fan 4, as shown in fig. 11.
The indoor unit of the present application is a ceiling type indoor unit installed on a ceiling of an indoor space, and the casing 1 is an indoor cabinet provided in the indoor space in the case of a split type air conditioner. The housing 1 is installed in an indoor ceiling, and includes a front surface, a rear surface, a bottom surface defining a bottom configuration, side surfaces disposed around the bottom surface, and a top surface defining a top appearance.
The utility model provides an air conditioning indoor unit combines the function of indoor temperature control and new trend, has the advantage of practicing thrift space, convenient to use.
In some embodiments of the present application, the present invention further includes a first throttling device, which is disposed on the parallel branch where the first heat exchange section 21 is located, and on the pipeline between the liquid header 200 and the first heat exchange section 21; the second throttling device is arranged on a parallel branch where the second heat exchange section 22 is located and is positioned on a pipeline between the liquid header pipe 200 and the second heat exchange section 22, and the flow of the refrigerant passing through the first throttling device can be limited through the first throttling device, namely the flow of the refrigerant entering the first heat exchange section 21 or flowing out of the first heat exchange section 21 can be limited; the flow of refrigerant through the second throttling arrangement, i.e., into or out of the second heat exchange stage 22, can be restricted by the second throttling arrangement.
Taking the common summer refrigeration working condition of 1.5 air conditioners in the market as an example, the outdoor fresh air volume entering the fresh air inlet 113 is usually 80m3Per hour (cubic meter per hour), and in order to meet the indoor cooling demand, the air handling capacity of the heat exchanger 2 in the indoor unit of an air conditioner is typically 600m3H, the indoor return air volume entering through the first indoor return air inlet 110 is usually 520m3And h, namely the heat exchange quantity of the first heat exchange section 21 to indoor return air is greater than that of the second heat exchange section 22 to fresh air, so that the flow of the refrigerant in the first heat exchange section 21 is greater than that of the refrigerant in the second heat exchange section 22.
To avoid the first heat exchange section 21 in the heat exchanger 2 returning air to the roomAnd the temperature difference of the second heat exchange section 22 after heat exchange of outdoor fresh air is too large, in some embodiments of the application, the first throttling device and the second throttling device are both capillary tubes, the tube diameters of the first throttling device and the second throttling device are equal, and the length L of the first throttling device is equal to that of the second throttling device1And length L of the second restriction2Satisfies the following conditions: l is2＝(1.5～2)L1And the flow of the refrigerant entering the first heat exchange section 21 and the flow of the refrigerant entering the second heat exchange section 22 are both proper, so that the temperature of the air of the indoor return air entering the first indoor return air inlet 110 after heat exchange through the first heat exchange section 21 is consistent with the temperature of the air of the outdoor fresh air entering the fresh air inlet 113 after heat exchange through the second heat exchange section 22, the phenomenon that condensation is generated due to uneven heat exchange of the two heat exchange sections of the heat exchanger 2 is avoided, and the use effect of a user is improved.
On the basis that the pipe diameters of the first throttling device and the second throttling device are equal, the length L of the first throttling device1And length L of the second restriction2Satisfies the following conditions: l is2＝(1.5～2)L1If L is2＞2L1The length L of the second throttle device2If the temperature is too long, the flow of the refrigerant entering the second heat exchange section 22 is low, so that the temperature of the air of the outdoor fresh air after heat exchange through the second heat exchange section 22 is lower than that of the air of the indoor return air after heat exchange through the first heat exchange section 21; if L is2＜1.5L1The length L of the second throttle device2If the temperature is too short, the flow of the refrigerant entering the second heat exchange section 22 is large, so that the temperature of the air of the outdoor fresh air after heat exchange in the second heat exchange section 22 is higher than that of the air of the indoor return air after heat exchange in the first heat exchange section 21, namely, the temperature of the outdoor fresh air and the temperature of the indoor return air after heat exchange in the heat exchanger 2 are inconsistent.
In order to further improve the heat exchange efficiency of the heat exchanger 2 and avoid the problems of the heat exchanger 2 that the temperature difference of the refrigerant after the heat exchange of the refrigerant in the two heat exchange sections is large, the refrigeration noise is generated, the service life of the heat exchanger 2 is shortened, and the like, the heat exchange area S of the first heat exchange section 211Heat exchange area S with the second heat exchange stage 222Satisfies the following conditions: s1/S2＝Q1×|T3-T1|/Q2×|T3-T2L, wherein Q1The inlet air quantity of the fresh air inlet 113, T1Temperature, Q, of the air entering the fresh air port 113 before the heat exchanger 22Is the return air quantity, T, of the first indoor return air inlet 1102Is the return air temperature, T, at the first indoor return air inlet 1103The target temperature of the fresh air and the indoor return air after heat exchange through the heat exchanger 2.
In addition, the indoor unit further comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is installed at the fresh air opening 113 or between the fresh air opening 113 and the first heat exchange section 21, and the first temperature sensor can detect the temperature of the air entering from the fresh air opening 113 before the heat exchanger 2. The second temperature sensor is installed at the first indoor air return opening 110 or between the first indoor air return opening 110 and the second heat exchange section 22, and the second temperature sensor can detect the return air temperature at the first indoor air return opening 110.
Wherein, the target temperature T of the fresh air and the indoor return air after heat exchange through the heat exchanger 23I.e. the preset temperature of the indoor unit.
In some embodiments of the application, the indoor unit further includes a wind guiding structure, the wind guiding structure is communicated with both the first wind channel and the second wind channel, a communication position of the wind guiding structure and the first wind channel is close to the indoor air outlet, a communication position of the wind guiding structure and the second wind channel is close to the second indoor air return inlet, and return air at the second indoor air return inlet can enter the first wind channel through the wind guiding structure.
It should be noted that: the air guide structure may be formed in various manners.
For example, a part of the wall surface of the second air duct near the second indoor air return opening 111 and a part of the wall surface of the first air duct near the indoor air outlet opening 112 are common walls, and the air guide structure is an air guide opening formed in the common walls, so that the structure is simple.
For another example, the air guiding structure is an air guiding pipe, one end of the air guiding pipe is communicated with one end of the second air duct close to the second indoor air return opening 111, and the other end of the air guiding pipe is communicated with one end of the first air duct close to the indoor air outlet 112.
In some possible embodiments of the present application, the communication between the air guiding structure and the first air duct is located between the first indoor air return opening 110 and the air inlet side of the heat exchanger 2. When the indoor unit operates in the internal circulation mode, the second indoor air return opening 111 and the first indoor air return opening 110 can be opened, the air guide structure is in a communicated state, the first indoor air return opening 110 and the second indoor air return opening 111 simultaneously perform air inlet heat exchange, and the air inlet amount of the indoor unit is large.
Of course, the communication position between the air guiding structure and the first air duct may also be located between the heat exchanger 2 and the indoor air outlet 112, as shown in fig. 2.
In order to improve the indoor air quality, in some embodiments of the present application, the indoor unit further includes a filtering device 6, the filtering device 6 is installed in the air guiding structure, and the first fan 3 is located between the air guiding structure and the first air duct, and the indoor air outlet 112; or the second fan 4 is positioned between the communication position of the air guide structure and the second air duct and the second indoor return air inlet 111; or the first fan 3 is positioned between the communication position of the air guide structure and the first air duct and the indoor air outlet 112, and the second fan 4 is positioned between the communication position of the air guide structure and the second air duct and the second indoor air return opening 111. The first fan 3, the second fan 4, or the first fan 3 and the second fan 4 promote to guide the indoor return air into the casing 1 through the second indoor return air inlet 111, filter the indoor return air through the filtering device 6 in the air guiding structure, and then discharge the indoor return air from the indoor air outlet 112, and the filtering device 6 filters impurities in the indoor air, that is, the indoor unit operates in the purification mode, as shown in fig. 2 and 12. Therefore, the indoor unit of this application still has air purifier's function, can further integrate the air treatment function, improves the treatment effeciency of room air, like carry out simultaneously refrigerate and filtering capability, or heat and filtering capability.
In some embodiments of the present application, the indoor unit further includes a total heat exchanger 7, a first heat exchange flow channel and a second heat exchange flow channel which exchange heat with each other are formed inside the total heat exchanger 7, the first heat exchange flow channel is connected in the first air duct, the first heat exchange flow channel is located between the fresh air port 113 and the second heat exchange section 22 of the heat exchanger 2, the second heat exchange flow channel is connected in the second air duct, outdoor fresh air can exchange heat with indoor return air entering the second heat exchange flow channel when passing through the first heat exchange flow channel of the total heat exchanger 7, so as to achieve heat recovery of the indoor return air and achieve precooling or preheating of the fresh air; and then the heat exchange is carried out with the second heat exchange section 22 of the heat exchanger 2, so that the temperature of the outdoor fresh air is further improved, the heat exchange effect of the indoor unit of the air conditioner is better, and the energy is saved. When the total heat exchanger 7 is opened, the fresh air mode is changed into a total heat exchange mode, and the air conditioner is suitable for being used under the condition that the temperature difference between outdoor fresh air and indoor air is large; when the temperature difference between the outdoor fresh air and the indoor air is small, a fresh air mode can be adopted.
It should be noted that: for the embodiment with the air guiding structure, the second heat exchange flow channel is located between the connection position of the second air channel and the air guiding structure and the outdoor air outlet 114, that is, in the purification mode, the indoor return air does not need to pass through the total heat exchanger 7, the length of the purification air channel is shortened, and the filter element cleaning cycle or the replacement cycle of the total heat exchanger 7 is shortened because the impurities of the indoor air are prevented from accumulating in the total heat exchanger 7.
Because outdoor fresh air can exchange heat with indoor return air entering the second heat exchange flow channel when passing through the first heat exchange flow channel of the total heat exchanger 7, for an embodiment in which the indoor unit comprises the total heat exchanger 7, the first temperature sensor is installed between the first heat exchange flow channel of the total heat exchanger 7 and the second heat exchange section 22 of the heat exchanger 2 and is located in the first air channel, and therefore the temperature of the air entering the outdoor fresh air in front of the heat exchanger 2 can be accurately detected.
According to the specific design of the first air duct and the second air duct, the first indoor air return opening 110, the second indoor air return opening 111, the indoor air outlet 112, the fresh air opening 113 and the outdoor air outlet 114 are respectively arranged on different surfaces or the same surface of the casing 1.
For example, referring to fig. 13 to 18, the first indoor return air inlet 110, the second indoor return air inlet 111, and the indoor air outlet 112 are located on the same side surface of the casing 1, and the indoor air outlet 112 is located between the first indoor return air inlet 110 and the second indoor return air inlet 111; the outdoor air outlet 114 and the fresh air inlet 113 are located on the same side surface of the casing 1, and the side surface of the fresh air inlet 113 is different from the side surface of the first indoor return air inlet 110. Since the first heat exchange flow passage and the second heat exchange flow passage in the total heat exchanger 7 are arranged in a crossing manner, the side surface where the first indoor return air inlet 110 is located is opposite to the side surface where the fresh air inlet 113 is located, the first indoor return air inlet 110 is opposite to the outdoor air outlet 114, and the fresh air inlet 113 is opposite to the second indoor return air inlet 111.
When the indoor unit operates in the purification mode, because the air guide structure is in a communicated state, suction is formed on both the indoor air return opening and the outdoor air outlet 114, so as to prevent outdoor air from entering the casing 1 or the indoor space from the outdoor air outlet 114, in some possible embodiments of the present application, an air valve is installed at the outdoor air outlet 114, the opening or closing of the outdoor air outlet 114 is controlled by the air valve, and when the indoor unit operates in the purification mode, the controller of the indoor unit can control the air valve to close the outdoor air outlet 114; in other possible embodiments of the present application, the indoor unit further includes a one-way air permeable film 8, the one-way air permeable film 8 is installed in the second air duct and located between the communication position of the second air duct and the air guiding structure and the outdoor air outlet 114, the one-way air permeable film 8 can form resistance to air entering through the outdoor air outlet 114, and allow air entering through the second indoor air return port 111 to pass through, so as to prevent outdoor air from entering the casing 1 or the indoor space through the outdoor air outlet 114, the one-way air permeable film 8 is cheap, and the manufacturing cost of the indoor unit can be reduced, as shown in fig. 2.
Illustratively, the one-way air-permeable membrane 8 is adhered to the inlet of the second heat exchange flow channel in the total heat exchanger 7, so as to prevent the outdoor air from entering the total heat exchanger 7.
Similarly, in some embodiments of the present application, the indoor unit further includes a first air valve 9, the first air valve 9 is installed at the first indoor air return opening 110, and the first air valve 9 can control the opening or closing of the first indoor air return opening 110, so as to control whether the indoor unit enters the internal circulation mode.
Illustratively, in some embodiments of the present application, the indoor unit further includes a second air valve 10, the second air valve 10 is installed at the fresh air port 113, and the second air valve 10 can control opening or closing of the fresh air port 113, so as to control whether to introduce fresh air into the room.
Similarly, for the embodiment that the air guiding structure is an air guiding opening formed in the common wall, the indoor unit further includes a third air valve 11, the third air valve 11 is installed at the air guiding opening, and the third air valve 11 can control the opening or closing of the air guiding opening, so as to control whether to purify the indoor air.
With continued reference to fig. 2, in some embodiments of the present application, a fourth air valve 51 is further included, a vent hole communicating the fresh air inlet 113 and the first indoor return air inlet 110 is formed in the partition 5, the fourth air valve 51 is installed at the vent hole, and the fourth air valve 51 is used for controlling whether to open a connection channel between the indoor return air and the outdoor fresh air.
When the indoor unit in the present application operates in the air mixing mode, the fourth air damper 51 is closed.
In the indoor unit operation internal circulation mode in the present application, if the fourth air valve 51 is closed, the indoor return air directly enters the first air duct through the first indoor return air inlet 110 to exchange heat with the first heat exchange section 21 of the heat exchanger 2, and then is guided out from the indoor air outlet 112 under the action of the first fan 3, as shown in fig. 19. When the indoor unit in the present application operates in the inner circulation mode, if the fourth air valve 51 is opened, a part of return air of the first indoor return air inlet 110 can exchange heat with the second heat exchange section 22 of the heat exchanger 2 through the opening of the fourth air valve 51, another part of return air of the first indoor return air inlet 110 directly exchanges heat with the first heat exchange section 21 of the heat exchanger 2, the first heat exchange section 21 and the second heat exchange section 22 of the heat exchanger 2 can exchange heat with the return air of the first indoor return air inlet 110 at the same time, the return air of the first indoor return air inlet 110 and the heat exchange area of the heat exchanger 2 are increased, and further the heat exchange efficiency of the air conditioner in the inner circulation mode is improved, as shown in fig. 20.
The partition 5 may be a partition plate, a partition pipe, or any other partition device capable of performing a partition function. In some embodiments of the present application, the partition 5 is a partition plate, and the partition plate may be made of a steel plate.
In some possible embodiments of the present application, the first fan 3 and the second fan 4 both adopt centrifugal fans, and the air volume and the air pressure of the centrifugal fans are both large, so that the centrifugal fans are suitable for being applied to application occasions with large air volume. Of course, cross-flow fans can be used for the first fan 3 and the second fan 4, and the types of the first fan 3 and the second fan 4 can be different.
Because heat exchanger 2 in this application needs two heat transfer sections to splice, heat exchanger 2 adopts the coil pipe heat exchanger in the embodiment of this application, can be according to the design in wind channel, and various shapes are made to coiling as required, and the manufacturing degree of difficulty is low, heat transfer performance is good, and has better corrosion resisting property. Furthermore, in some embodiments of the present application, the heat exchanger 2 of the indoor unit is a plate heat exchanger.
The embodiment of the application also comprises an air conditioner which comprises the indoor unit in the embodiment. Because the indoor unit installed in the air conditioner has the same structure as the indoor unit, the air conditioner can obtain the same technical effect, and the description is omitted here.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An indoor unit, comprising:
the air conditioner comprises a shell, a first indoor air return inlet, a second indoor air return inlet, an indoor air outlet, a fresh air inlet and an outdoor air outlet are formed in the shell, a first air duct and a second air duct are formed in the shell, the first air duct is used for communicating the first indoor air return inlet, the fresh air inlet and the indoor air outlet, and the second air duct is used for communicating the second indoor air return inlet and the outdoor air outlet;
the heat exchanger is arranged in the first air duct;
the first fan is positioned between the heat exchanger and the indoor air outlet;
the second fan is arranged in the second air duct;
the partition is installed in the first air duct, the heat exchanger comprises a first heat exchange section and a second heat exchange section which are connected in parallel, the first heat exchange section is arranged close to the first indoor air return opening, the second heat exchange section is arranged close to the fresh air opening, and the partition separates an air duct between the first indoor air return opening and the windward side of the first heat exchange section from an air duct between the fresh air opening and the windward side of the second heat exchange section;
a header pipe for communicating with one of an inlet and an outlet of a refrigerant pipe in the outdoor unit;
the first heat exchange section and the second heat exchange section are connected between the main liquid pipe and the main gas pipe in parallel.
2. The indoor unit according to claim 1, further comprising:
the first throttling device is arranged on a parallel branch where the first heat exchange section is located and on a pipeline between the main liquid pipe and the first heat exchange section;
and the second throttling device is arranged on the parallel branch where the second heat exchange section is positioned and is positioned on a pipeline between the main liquid pipe and the second heat exchange section.
3. The indoor unit according to claim 2, wherein the first throttling means and the second throttling means are both capillary tubes, the diameters of the tubes of the first throttling means and the second throttling means are equal, and the length L of the first throttling means is equal to the length L of the second throttling means1And the length L of the second restriction2Satisfies the following conditions: l is2＝(1.5～2)L1。
4. Indoor unit according to claim 1, characterized in that the heat exchange area S of the first heat exchange section1The heat exchange area S with the second heat exchange section2Satisfies the following conditions: s1/S2＝Q1×|T3-T1|/Q2×|T3-T2L, wherein Q1The air inlet quantity of the fresh air inlet, T1For the temperature of the air entering from the fresh air inlet before the heat exchanger, Q2Is the return air quantity of the first indoor return air inlet, T2Is the return air temperature T at the first indoor return air inlet3The fresh air and the indoor return air are subjected to heat exchange through the heat exchanger to obtain target temperatures.
5. The indoor unit according to claim 1, further comprising:
the air guide structure is communicated with the first air channel and the second air channel, the communication position of the air guide structure and the first air channel is close to the indoor air outlet, and the communication position of the air guide structure and the second air channel is close to the second indoor return air inlet;
the filtering device is arranged in the air guide structure, and the first fan is positioned between the communication position of the air guide structure and the first air channel and the indoor air outlet; and/or the second fan is positioned between the communication position of the air guide structure and the second air duct and the second indoor return air inlet.
6. The indoor unit according to claim 5, further comprising:
the full heat exchanger is internally provided with a first heat exchange flow channel and a second heat exchange flow channel which exchange heat with each other, the first heat exchange flow channel is connected in the first air channel and is positioned between the fresh air inlet and the second heat exchange section of the heat exchanger, and the second heat exchange flow channel is connected in the second air channel.
7. The indoor unit according to claim 5 or 6, further comprising:
the one-way breathable film is installed in the second air channel and located at the communication position of the second air channel and the air guide structure and between the outdoor air outlets, the one-way breathable film can allow air flowing from the second indoor air return opening to the outdoor air outlets to pass through, and meanwhile resistance is formed on air flowing from the outdoor air outlets to the second indoor air return opening.
8. The indoor unit according to claim 1, further comprising:
the first air valve is arranged at the first indoor air return opening;
and the second air valve is arranged at the fresh air port.
9. The indoor unit of claim 1, wherein the first fan and the second fan are both centrifugal fans.
10. An air conditioner characterized by comprising the indoor unit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020332204.6U CN211903076U (en) | 2020-03-17 | 2020-03-17 | Indoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020332204.6U CN211903076U (en) | 2020-03-17 | 2020-03-17 | Indoor unit and air conditioner |
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| Publication Number | Publication Date |
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| CN211903076U true CN211903076U (en) | 2020-11-10 |
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| CN202020332204.6U Active CN211903076U (en) | 2020-03-17 | 2020-03-17 | Indoor unit and air conditioner |
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| CN (1) | CN211903076U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576743A (en) * | 2020-11-30 | 2022-06-03 | 南京佳力图机房环境技术股份有限公司 | Indirect evaporation cooling unit suitable for high-heat weather |
| CN115930296A (en) * | 2022-12-12 | 2023-04-07 | 珠海格力电器股份有限公司 | Indoor heat exchange device and constant temperature and humidity equipment |
-
2020
- 2020-03-17 CN CN202020332204.6U patent/CN211903076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576743A (en) * | 2020-11-30 | 2022-06-03 | 南京佳力图机房环境技术股份有限公司 | Indirect evaporation cooling unit suitable for high-heat weather |
| CN115930296A (en) * | 2022-12-12 | 2023-04-07 | 珠海格力电器股份有限公司 | Indoor heat exchange device and constant temperature and humidity equipment |
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| CP03 | Change of name, title or address |
Address after: No.1 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Patentee after: Hisense Air Conditioning Co.,Ltd. Country or region after: China Address before: No. 151, Zhuzhou Road, Laoshan District, Qingdao, Shandong Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. Country or region before: China |
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