CN105937788B - Integral air conditioner and control method thereof - Google Patents
Integral air conditioner and control method thereof Download PDFInfo
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- CN105937788B CN105937788B CN201610389188.2A CN201610389188A CN105937788B CN 105937788 B CN105937788 B CN 105937788B CN 201610389188 A CN201610389188 A CN 201610389188A CN 105937788 B CN105937788 B CN 105937788B
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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
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
本发明公开了一种整体式空调器及其控制方法。整体式空调器包括：底盘、电控盒、压缩机、节流装置、室内室外换热器和散热装置。散热装置包括并联连接在室外换热器和节流装置之间的第一冷媒流路和第二冷媒流路，散热装置还包括散热器和流量控制件，散热器串联在第一冷媒流路上，流量控制件构造为可控制第一冷媒流路和第二冷媒流路的流量。根据本发明的整体式空调器，可对待散热件进行有效散热，同时当流经散热装置的冷媒温度过低时，也可减小流经散热器的冷媒流量。由于在制冷运行时散热器流入的冷媒尚未节流，避免散热器内的冷媒过冷，从而避免待散热件上出现凝露，提高了系统运行的可靠性。
The invention discloses an integral air conditioner and a control method thereof. The integral air conditioner includes: chassis, electric control box, compressor, throttling device, indoor and outdoor heat exchanger and cooling device. The heat dissipation device includes a first refrigerant flow path and a second refrigerant flow path connected in parallel between the outdoor heat exchanger and the throttling device, the heat dissipation device also includes a radiator and a flow control member, and the radiator is connected in series on the first refrigerant flow path, The flow control member is configured to control the flows of the first refrigerant flow path and the second refrigerant flow path. According to the integrated air conditioner of the present invention, the heat dissipation parts to be radiated can be effectively dissipated, and at the same time, when the temperature of the refrigerant flowing through the heat dissipation device is too low, the flow rate of the refrigerant flowing through the radiator can also be reduced. Since the refrigerant flowing into the radiator has not been throttled during the cooling operation, the refrigerant in the radiator is prevented from being overcooled, thereby avoiding condensation on the parts to be radiated, and improving the reliability of the system operation.
Description
Technical Field
The invention relates to the field of refrigerating and heating equipment, in particular to an integral air conditioner and a control method thereof.
Background
The electronic control module of the frequency converter has the problem of large heat productivity, if the temperature is too high, the service life of an electronic control component is greatly influenced, the cooling technology of the electronic control box in the current industry mainly comprises two technologies, one technology is air cooling, namely, the wind field of a fan is utilized to drive the electronic control box to dissipate heat; the other is cooling by a refrigerant, namely, the refrigerant with lower temperature in the system is introduced into the electric control box, and the cold energy of the refrigerant is utilized to dissipate the heat of the electric control box. The first air cooling mode has high noise and more dust in the box body, and the second refrigerant cooling mode easily generates condensed water on the electric control box, so that elements are damaged.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, an object of the present invention is to provide an integral air conditioner, which can avoid the problem of surface condensation caused by low-temperature refrigerant flowing through the heat sink.
Another object of the present invention is to provide a control method of the unitary air conditioner.
An integral type air conditioner according to an embodiment of the present invention includes: a chassis; an electric control box for controlling the running state of the integral air conditioner; the compressor is arranged on the chassis; the indoor heat exchanger is arranged on the chassis; the outdoor heat exchanger is arranged on the chassis; a throttling device connected in series between the indoor heat exchanger and the outdoor heat exchanger; the heat dissipation device comprises a first refrigerant flow path and a second refrigerant flow path which are connected in parallel between the outdoor heat exchanger and the throttling device, and further comprises a radiator and a flow control piece, wherein the radiator is used for dissipating heat of a heat dissipation piece to be dissipated, the radiator is connected in series with the first refrigerant flow path, and the flow control piece is used for controlling the flow of the first refrigerant flow path and the flow of the second refrigerant flow path.
According to the integral air conditioner provided by the embodiment of the invention, the first refrigerant flow path and the second refrigerant flow path which are connected in parallel are arranged in the heat dissipation device, the radiator is connected in series on the first refrigerant flow path, the flow control piece can control the flow of the refrigerant flowing through the radiator, so that the heat of the heat dissipation piece to be dissipated is effectively dissipated, and meanwhile, when the temperature of the refrigerant flowing through the heat dissipation device is too low, the flow of the refrigerant flowing through the radiator can be reduced. Because the refrigerant that the radiator flowed into when refrigerating the operation has not been throttled yet, avoid the refrigerant supercooling in the radiator to avoid waiting to dispel the heat and appear condensing on the piece, improved the reliability of system's operation.
In some embodiments, a condensed water collecting region for collecting condensed water on the indoor heat exchanger is disposed on the base pan, and a portion of the first refrigerant flow path is disposed in the condensed water collecting region. Therefore, the heat dissipation effect of the radiator can be further improved.
Specifically, the flow control member includes a first flow control valve and a second flow control valve, the first flow control valve is connected in series to the first refrigerant flow path, and the second flow control valve is connected in series to the second refrigerant flow path. Therefore, the two refrigerant flow paths are controlled respectively, and the control is more convenient.
In some embodiments, the heat sink is connected to the electronic control box to dissipate heat from the electronic control box. Therefore, the characteristics of the all-in-one machine can be fully utilized, the electric control element can be effectively radiated, damage caused by overhigh temperature of the electric control element is avoided, and the reliability of the system is further improved.
Specifically, the radiator is tightly attached to the lower surface of the electronic control box. Therefore, the contact area between the radiator and the electric control box is large, and the heat exchange efficiency is high. The radiator is arranged below the electric control box, so that the radiator is prevented from interfering maintenance of the electric control box, the radiator is lower in position, and the first refrigerant flow path is conveniently arranged on the chassis.
In some embodiments, the chassis is provided with an inner air duct and an outer air duct which are spaced apart from each other, the indoor heat exchanger is arranged in the inner air duct, and the outdoor heat exchanger is arranged in the outer air duct.
Specifically, the electronic control box is connected between the inner air duct and the outer air duct, and the electronic control box is spaced from the chassis.
According to the control method of the integral air conditioner provided by the embodiment of the invention, the integral air conditioner is the integral air conditioner provided by the embodiment of the invention, and the control of the integral air conditioner comprises the following steps: detecting the temperature t of the heat-dissipating piece to be dissipated after the integral air conditioner is started; and the flow control element adjusts the flow of the first refrigerant flow path and the second refrigerant flow path according to the detected temperature t.
According to the control method of the integral air conditioner, the first refrigerant flow path and the second refrigerant flow path which are connected in parallel are arranged in the heat dissipation device, the heat radiator is connected in series on the first refrigerant flow path, the flow control piece can control the flow of the refrigerant flowing through the heat radiator, the temperature of the heat to be dissipated can be controlled within a set range, and the operation reliability of the integral air conditioner is improved.
Specifically, detecting the temperature t of the to-be-cooled piece at set intervals; when the temperature T of the heat-dissipating member is less than or equal to a first set value T1, the flow control element reduces the flow of the first refrigerant flow path and increases the flow of the second refrigerant flow path; when the temperature T of the heat-dissipating member to be dissipated is greater than or equal to a second set value T2, the flow control element reduces the flow of the second refrigerant flow path and increases the flow of the first refrigerant flow path; when the temperature T of the heat-dissipating member satisfies T1< T < T2, the flow rate of the first refrigerant flow path and the flow rate of the second refrigerant flow path are kept unchanged. Therefore, the temperature of the heat dissipation piece to be cooled can be controlled to be in the range of (T1, T2) generally, and the control is very accurate.
More specifically, when the flow control member includes a first flow control valve and a second flow control valve, the first flow control valve is connected in series to the first refrigerant flow path, and the second flow control valve is connected in series to the second refrigerant flow path, if the detected temperature T of the heat-dissipating member to be dissipated is less than or equal to a first set value T1, the opening degree of the first flow control valve is adjusted to O1, and the opening degree of the second flow control valve is adjusted to O3; if the detected temperature T of the heat-to-be-dissipated element is greater than or equal to a second set value T2, adjusting the opening degree of the first flow control valve to O3, and adjusting the opening degree of the second flow control valve to O1; and if the detected temperature T of the heat dissipation member to be dissipated meets T1< T < T2, the opening degrees of the first flow control valve and the second flow control valve are respectively adjusted to O2, wherein O1< O2< O3. Each flow control valve only needs to be provided with three opening gears, the structure is simple, and the control process is simple.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an internal structure of an integral type air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic view illustrating a refrigerant circulation system of the unitary air conditioner according to an embodiment of the present invention;
FIG. 3 is a logic control diagram of a flow control according to one embodiment of the present invention;
fig. 4 is a control schematic of a flow control member as a function of temperature of the electrical cassette according to one embodiment of the present invention.
Reference numerals:
an integral air conditioner 100,
A compressor 1, an exhaust port a, an intake port b,
An electric control box 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, a throttling device 5,
A heat sink 6, a first refrigerant channel 61, a second refrigerant channel 62, a heat sink 63, a flow control member 64, a first flow control valve 641, a second flow control valve 642,
Chassis 7, interior wind channel 8, outer wind channel 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An integral type air conditioner 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 2.
As shown in fig. 1 and 2, the unitary air conditioner 100 according to the embodiment of the present invention includes: a chassis 7, an electric control box 2 for controlling the operation state of the unitary air conditioner 100, a compressor 1, an indoor heat exchanger 4, an outdoor heat exchanger 3, a throttling device 5 and a heat sink 6.
The compressor 1, the indoor heat exchanger 4, and the outdoor heat exchanger 3 are provided on the base plate 7, and the compressor 1 has an intake port b and an exhaust port a. It should be noted that the structures, working principles, etc. of the compressor, the electronic control box 2, the outdoor heat exchanger 3 and the indoor heat exchanger 4 are all the prior art, and will not be described in detail here.
In the integral air conditioner 100, a chassis 7 is provided with an inner air duct 8 and an outer air duct 9 which are spaced apart, an indoor heat exchanger 4 is arranged in the inner air duct 8, an outdoor heat exchanger 3 is arranged in the outer air duct 9, a throttling device 5 is connected in series between the indoor heat exchanger 4 and the outdoor heat exchanger 3, and the throttling device 5, a compressor 1, the indoor heat exchanger 4 and the outdoor heat exchanger 3 form a refrigerant circulation system. Alternatively, the throttling device 5 may be a capillary tube, an orifice plate, a mechanical expansion valve, an electronic expansion valve, or the like, and is not particularly limited herein.
Here, the unitary air conditioner 100 may be a cooling and heating machine, and the unitary air conditioner 100 may also be a cooling machine, from the viewpoint of the function of the air conditioner. For the use of the air conditioner, the unitary air conditioner 100 may be a window type air conditioner, or the unitary air conditioner 100 may be a mobile air conditioner or other type of all-in-one machine.
When the unitary air conditioner 100 is cold-warm, the unitary air conditioner 100 has a cooling mode and a heating mode. At this time, the unitary air conditioner 100 further includes a reversing component, the reversing component has an air suction interface, an air discharge interface, an inner machine interface, and an outer machine interface, the air suction interface is conducted with one of the inner machine interface and the outer machine interface, and the air discharge interface is conducted with the other of the inner machine interface and the outer machine interface. The air suction interface is connected with an air suction port b of the compressor 1, and the air exhaust interface is connected with an air exhaust port a of the compressor 1. When the unitary air conditioner 100 is in the cooling mode, the air intake interface is connected to the indoor unit interface and the air exhaust interface is connected to the outdoor unit interface. When the unitary air conditioner 100 is in the heating mode, the air intake interface is in communication with the external machine interface and the air exhaust interface is in communication with the internal machine interface. Preferably, the reversing component is a four-way valve. In the cooling and heating type integral air conditioner, the first end of an indoor heat exchanger 4 is connected with an indoor machine interface, the first end of an outdoor heat exchanger 3 is connected with an outdoor machine interface, and a throttling device 5 is connected between the second end of the indoor heat exchanger 4 and the second end of the outdoor heat exchanger 3.
When the unitary air conditioner 100 is a single cooler, as shown in fig. 2, the unitary air conditioner 100 has a cooling mode. In the single cooling type unitary air conditioner, a first end of an indoor heat exchanger 4 is connected to an air suction port b of a compressor 1, a first end of an outdoor heat exchanger 3 is connected to an air discharge port a of the compressor 1, and a throttle device 5 is connected between a second end of the indoor heat exchanger 4 and a second end of the outdoor heat exchanger 3.
In both the cooling and heating type unitary air conditioner and the single cooling type unitary air conditioner, the heat sink 6 is connected in series between the second end of the indoor heat exchanger 4 and the second end of the outdoor heat exchanger 3. Therefore, for the sake of simplicity, the structure of the unitary air conditioner 100 will be described below by taking the single cooling type air conditioner shown in fig. 2 as an example.
Referring to fig. 1 and 2, the heat dissipation device 6 includes a first refrigerant flow path 61 and a second refrigerant flow path 62 connected in parallel between the outdoor heat exchanger 3 and the throttling device 5, the heat dissipation device 6 further includes a heat sink 63 and a flow control member 64, the heat sink 63 is connected to a member to be cooled in the unitary air conditioner 100, the heat sink 63 is used for dissipating heat from the member to be cooled, the heat sink 63 is connected in series to the first refrigerant flow path 61, and the flow control member 64 is configured to control the flow rates of the first refrigerant flow path 61 and the second refrigerant flow path 62.
That is, the heat sink 6 is connected in series between the indoor heat exchanger 4 and the outdoor heat exchanger 3, and the refrigerant in the refrigerant cycle system can flow through the first refrigerant flow path 61 and the second refrigerant flow path 62. The radiator 63 is connected in series to the first refrigerant flow path 61, and the refrigerant flows through the radiator 63 to absorb heat of the heat to be dissipated.
The arrangement of the first refrigerant flow path 61, the second refrigerant flow path 62 and the flow control member 64 can better distribute the refrigerant flow of the two flow paths, and can make adjustment changes according to the temperature of the heat-dissipating member to be cooled, the service time of the air conditioner or the service season and the like.
In the example shown in fig. 2, when the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 1 and flows into the outdoor heat exchanger 3, the refrigerant is discharged in the outdoor heat exchanger 3 and condenses to form a low-temperature and medium-pressure liquid refrigerant, and then the refrigerant is discharged into the heat sink 6. The refrigerant flowing into the first refrigerant flow path 61 absorbs heat and evaporates while flowing through the radiator 63, then the refrigerants of the two flow paths converge and flow to the throttling device 5 to be throttled and decompressed, the decompressed low-temperature and low-pressure liquid refrigerant flows into the indoor heat exchanger 4 to be evaporated and absorb heat to reduce the indoor temperature, and finally the refrigerant in the indoor heat exchanger 4 flows back to the compressor 1, and the process is repeated.
In the example of fig. 2, when the vehicle enters summer, the heat of the heat-dissipating member needs to be dissipated, and the flow rate of the first refrigerant flow path 61 may be increased to increase the heat absorption capacity of the heat-dissipating member. When the heat sink is in winter, the heat of the heat sink is not required to be dissipated, and the flow rate of the first coolant flow path 61 can be reduced, so that the heat absorption capacity of the heat sink is reduced.
Here, the radiator 63 may radiate heat from a component having a large amount of heat generated in the integral air conditioner 100, and the type of the member to be radiated is not particularly limited.
In hot summer, the heat of the heat generating components is not easily dissipated, and the heat sink 63 is provided mainly to dissipate heat in hot weather, so that the air conditioner generally needs to increase the flow rate of the first refrigerant passage 61 only during cooling.
In some materials disclosed in the related art, the heat dissipation heat exchanger is usually connected in series or in parallel to the throttled pipeline, and in the related art, taking a single-cooler as an example, the heat dissipation heat exchanger is usually connected in series between the throttling device and the indoor heat exchanger. But the temperature of the throttled refrigerant is too low, condensed water is easy to form on the heat dissipation part, and when the radiator is used for dissipating the electric control box, the electric control box is easy to be stained with water, so that the electric control module is in failure, and the electric control service life is influenced. Therefore, the related art is not widely used.
In this patent application, the radiator 63 is connected in series on the refrigerant pipeline before throttling, and the temperature of the refrigerant discharged from the outdoor heat exchanger 3 during refrigeration operation is not too low, so that the condensate water is prevented from being generated on the surface of the heat dissipation member. That is, in one refrigeration cycle, the refrigerant flows through the heat sink 6, then through the throttle 5, and then to the indoor heat exchanger 4. Because the throttling device 5 has the function of cooling, the refrigerant absorbs heat in the heat radiating device 6 and then releases heat by the throttling device 5, the temperature of the refrigerant flowing into the indoor heat exchanger 4 can be ensured to be lower, and the energy efficiency is improved.
According to the integral air conditioner 100 of the embodiment of the invention, the first refrigerant flow path 61 and the second refrigerant flow path 62 which are connected in parallel are arranged in the heat dissipation device 6, the heat radiator 63 is connected in series on the first refrigerant flow path 61, and the flow control member 64 can control the flow of the refrigerant flowing through the heat radiator 63, so that the heat to be dissipated is effectively dissipated, and meanwhile, when the temperature of the refrigerant flowing through the heat dissipation device 6 is too low, the flow of the refrigerant flowing through the heat radiator 63 can be reduced. Because the refrigerant flowing into the radiator 63 is not throttled during the refrigeration operation, the refrigerant in the radiator 63 is prevented from being supercooled, thereby preventing condensation from appearing on the heat-radiating part to be cooled, and improving the reliability of the system operation.
In the embodiment of the present invention, the integral air conditioner 100 has the inner air duct 8 and the outer air duct 9 spaced apart from each other, the inner air duct 8 can communicate with the indoor space to absorb heat and cool the indoor space, and the outer air duct 9 can communicate with the outdoor environment to release heat to the outdoor space.
In some embodiments, the electrical control box 2 is connected between the inner duct 8 and the outer duct 9 to facilitate electrical connection between the inner and outer components. Meanwhile, the compressor 1 is also arranged between the inner air duct 8 and the outer air duct 9, and the large-volume components are arranged between the inner air duct 8 and the outer air duct 9, so that the inner air duct and the outer air duct can be separated, and the heat exchange efficiency of the air conditioner can be improved.
In some embodiments, the heat radiator 63 is connected to the electronic control box 2 to radiate heat from the electronic control box 2, so that the characteristics of the all-in-one machine can be fully utilized to effectively radiate heat from the electronic control element, and damage caused by over-high temperature of the electronic control element is avoided, thereby further improving the reliability of the system.
In a specific example, the unitary air conditioner 100 is a window type single-cooling inverter air conditioner, the heat value of the electronic control box 2 of the unitary air conditioner 100 is large, and especially, the heat value of the electronic control box 2 is not easy to disperse in a high-temperature environment, so that the electronic control box 2 is connected to the radiator 63, the heat radiation of the electronic control box 2 can be carried out controllably, and a good heat radiation effect of an electronic control module of the window type single-cooling inverter air conditioner is ensured.
Specifically, the electronic control box 2 is arranged above the chassis 7 at intervals, so that the periphery of the electronic control box 2 is ventilated, and the heat dissipation of the electronic control box 2 can be enhanced by air circulation.
More specifically, the heat sink 63 is tightly attached to the lower surface of the electronic control box 2, so that the contact area between the heat sink 63 and the electronic control box 2 is large, and the heat exchange efficiency is high. The radiator 63 is arranged below the electronic control box 2, so that the radiator 63 is prevented from interfering with maintenance of the electronic control box 2, and the first refrigerant flow path 61 is conveniently arranged on the chassis 7 due to the lower position of the radiator 63.
In one embodiment of the present invention, the heat sink 63 may adopt various miniature heat exchanger structures disclosed in the prior art, and is not limited herein. Preferably, the radiator 63 is constructed as a heat radiation coil, so that the structure of the radiator 63 is simple.
In some embodiments, the base plate 7 is provided with a condensed water collecting region for collecting condensed water on the indoor heat exchanger 4, and at least a portion of the first refrigerant flow path 61 is disposed in the condensed water collecting region.
Compared with the scheme that the heat-radiating heat exchanger is directly connected in series between the outlet of the condenser and the throttling element, the refrigerant before throttling flows through the radiator 63, the cooling effect is good during refrigeration, condensate water cannot be generated, but the cooling effect does not reach an ideal state because the temperature of the refrigerant coming out of the condenser is higher.
The refrigerant before throttling flows through the radiator 63 after passing through the condensed water collecting area, and the condensed water is utilized to absorb heat, so that the heat dissipation effect of the radiator 63 can be further improved, and the refrigerant temperature is not too low to cause condensation on the heat dissipation member to be dissipated.
Specifically, when the air conditioning system is operated in a cooling mode, condensed water is generated on the indoor heat exchanger 4. As the condensed water increases, the condensed water slowly flows along the chassis 7 to the outer air duct 9. The first refrigerant flow path 61 passes through the condensed water collecting area on the base plate 7, and the refrigerant in the first refrigerant flow path 61 exchanges heat with the condensed water with lower temperature, so that the temperature of the refrigerant in the first refrigerant flow path 61 is further reduced, even is lower than the temperature of the refrigerant at the second end of the outdoor heat exchanger 4 by more than 5 ℃. The radiator 63 is connected in series to the first refrigerant flow path 61, and the heat to be radiated can be radiated better due to further reduction in the temperature of the refrigerant.
Optionally, a condensate collecting tank is disposed on the chassis 7, the condensate collecting tank is located between the inner air duct 8 and the outer air duct 9, and a portion of the first refrigerant flow path 61 is disposed in the condensate collecting tank.
In some embodiments of the present invention, as shown in fig. 1 and 2, the flow control member 64 includes a first flow control valve 641 and a second flow control valve 642, the first flow control valve 641 is connected to the first refrigerant flow path 61 in series, and the second flow control valve 642 is connected to the second refrigerant flow path 62 in series. Therefore, the two refrigerant flow paths are controlled respectively, and the control is more convenient.
Of course, the structure of the flow control member 64 according to the embodiment of the present invention is not limited thereto, for example, the flow control member 64 may also be a three-way solenoid valve, the three-way solenoid valve is disposed at the refrigerant inlet and outlet of the heat sink 6, two valve ports of the three-way solenoid valve are respectively connected to the first refrigerant flow path 61 and the second refrigerant flow path 62, a third valve port of the three-way solenoid valve is connected to the main pipe of the refrigerant circulation system, and the three-way solenoid valve can simultaneously control the refrigerant flow passing through the first refrigerant flow path 61 and the second refrigerant flow path 62. Alternatively, the flow control member 64 may be provided in the radiator 63 to control the flow rate of the refrigerant flowing through the radiator 63.
In a specific example, as shown in fig. 2, the first refrigerant flow path 61 and the second refrigerant flow path 62 are connected in parallel, and the first flow control valve 641 and the second flow control valve 642 are provided in the first refrigerant flow path 61 and the second refrigerant flow path 62, respectively. One ends of the first refrigerant passage 61 and the second refrigerant passage 62 are connected to the second end of the outdoor heat exchanger 3, and the other ends are connected to the expansion device 5. The radiator 63 of the electronic control box 2 is connected in series to the first refrigerant flow path 61, is located below the electronic control box 2, and is tightly connected to the electronic control box. The electric control box 2 is positioned between the inner air duct 8 and the outer air duct 9, the outdoor heat exchanger 3, the indoor heat exchanger 4 and the compressor 1 are all positioned on the chassis 7, and the outdoor heat exchanger 3 and the indoor heat exchanger 4 are respectively wrapped by the outer air duct 9 and the inner air duct 8.
The air conditioning system makes full use of the structural characteristics of the integral air conditioner 100, and the first refrigerant flow path 61 flows through the base plate 7 and exchanges heat with the condensed water fully. Meanwhile, the flow control valves are arranged on the two flow paths to distribute the refrigerant flow of the two flow paths, so that a better heat dissipation effect of the electronic control module can be achieved.
A control method of an integral air conditioner according to an embodiment of the present invention will be described below with reference to fig. 1 to 4, in which the integral air conditioner 100 according to the above-described embodiment of the present invention is adapted to the method, and the structure of the integral air conditioner 100 will not be described in detail below.
The control method of the integral air conditioner according to the embodiment of the invention comprises the following steps:
detecting the temperature t of the heat-dissipating member after the integral air conditioner 100 is started;
the flow rate controller 64 adjusts the flow rates of the first refrigerant flow path 61 and the second refrigerant flow path 62 according to the detected temperature t.
Therefore, according to the control method of the integral air conditioner provided by the embodiment of the invention, the temperature of the heat dissipation piece to be cooled can be controlled in a set range, and the operation reliability of the integral air conditioner is improved.
In some embodiments, the temperature t of the member to be cooled is detected every set time after the unitary air conditioner 100 is turned on.
Specifically, when the temperature T of the heat sink to be cooled is less than or equal to the first set value T1, the flow control member 64 decreases the flow rate of the first refrigerant flow path 61 and increases the flow rate of the second refrigerant flow path 62;
when the temperature T of the heat sink is greater than or equal to a second set value T2, the flow control member 64 decreases the flow rate of the second refrigerant flow path 62 and increases the flow rate of the first refrigerant flow path 61;
when the temperature T of the heat sink satisfies T1< T2, the flow rates of the first refrigerant flow path 61 and the second refrigerant flow path 62 are kept unchanged.
In this way, the temperature of the heat dissipation member to be dissipated can be controlled substantially within the range of (T1, T2), and the control is very accurate.
In some embodiments, as shown in fig. 2, the flow control member 64 includes a first flow control valve 641 and a second flow control valve 642, and the first flow control valve 641 is connected in series to the first refrigerant flow path 61, and the second flow control valve 642 is connected in series to the second refrigerant flow path 62.
After the air conditioner is turned on, as shown in fig. 4, if the detected temperature T of the to-be-cooled member is less than or equal to a first set value T1, the opening degree of the first flow control valve 641 is adjusted to O1, and the opening degree of the second flow control valve 642 is adjusted to O3;
if the temperature T of the to-be-cooled member is greater than or equal to the second set value T2, the opening degree of the first flow control valve 641 is adjusted to O3, and the opening degree of the second flow control valve 642 is adjusted to O1;
if the temperature T of the to-be-cooled member satisfies T1< T2, the opening degrees of the first and second flow control valves 641 and 642 are respectively adjusted to O2, wherein O1< O2< O3.
Therefore, each flow control valve only needs to be provided with three opening gears, the structure is simple, and the control process is simple.
Taking an embodiment shown in fig. 3 and 4 as an example, the first step of the control process of the unitary air conditioner 100 is: and starting up operation, wherein the step refers to conventional refrigerating operation.
When the air conditioner is turned on, the first flow control valve 641 and the second flow control valve 642 are both opened to O2.
When the air conditioner starts to time from the start, and the running time reaches m1, the method proceeds to step two: and detecting the temperature t of the electric control module.
Then, the third step is carried out: the range section where the detected temperature t of the electronic control module is located is determined, and then the first flow control valve 641 and the second flow control valve 642 select different opening degrees according to the range section where the temperature t of the electronic control module is located.
After the opening degrees of the first flow rate control valve 641 and the second flow rate control valve 642 are adjusted, step four is performed: and the air conditioner controls the adjusted opening degree to operate, starts to count again after adjustment, returns to the step two when the operation time reaches m2, namely detects and adjusts again after the operation time reaches m2 after adjustment, and repeats the cycle according to the process until the air conditioner is turned off.
In the above embodiment, when the temperature T of the electronic control module is less than or equal to T1, the opening degrees of the first flow control valve 641 and the second flow control valve 642 are adjusted to O1 and O3, respectively; when T1< T2, the opening degrees of the first and second flow control valves 641 and 642 are adjusted to O2, respectively; when T is equal to or greater than T2, the opening degrees of the first flow control valve 641 and the second flow control valve 642 are adjusted to O3 and O1, respectively; wherein O3> O2> O1, and T2> T1.
For different temperature intervals, the flow control valve selects different opening degrees, so that the heat dissipation of the electric control module is better performed, and the supercooling or overheating is avoided; and secondly, the stable operation of the refrigerating system is considered.
According to the control method of the air conditioner, the flow control valve is used for controlling, and the opening degree of the flow control valve is adjusted according to the temperature of the electric control module detected in the electric control box 2. When the detected temperature is in different temperature ranges, the flow control valve adopts different opening degrees, and the effect of distributing the refrigerant flow is achieved through the control.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. An integral air conditioner, comprising:
a chassis;
an electric control box for controlling the running state of the integral air conditioner;
the compressor is arranged on the chassis;
the indoor heat exchanger is arranged on the chassis;
the outdoor heat exchanger is arranged on the chassis;
a throttling device connected in series between the indoor heat exchanger and the outdoor heat exchanger;
the heat dissipation device comprises a first refrigerant flow path and a second refrigerant flow path which are connected in parallel between the outdoor heat exchanger and the throttling device, and further comprises a radiator and a flow control piece, wherein the radiator is used for dissipating heat of a heat dissipation piece, the radiator is connected in series with the first refrigerant flow path, the flow control piece is used for controlling the flow of the first refrigerant flow path and the flow of the second refrigerant flow path, and the radiator is connected with the electric control box to dissipate heat of the electric control box; wherein,
the chassis is provided with an inner air duct and an outer air duct which are spaced apart, the indoor heat exchanger is arranged in the inner air duct, the outdoor heat exchanger is arranged in the outer air duct, the electric control box is connected between the inner air duct and the outer air duct, and the electric control box is spaced apart from the chassis.
2. The unitary air conditioner according to claim 1, wherein a condensate water collecting region for collecting condensate water on the indoor heat exchanger is provided on the base pan, and a portion of the first refrigerant flow path is provided in the condensate water collecting region.
3. The unitary air conditioner according to claim 1, wherein the flow control member comprises a first flow control valve and a second flow control valve, the first flow control valve being connected in series to the first refrigerant flow path, the second flow control valve being connected in series to the second refrigerant flow path.
4. The unitary air conditioner according to claim 1, wherein said heat sink is closely attached to a lower surface of said electric control box.
5. A control method of an integral air conditioner, characterized in that the integral air conditioner is the integral air conditioner according to any one of claims 1-4, and the control of the integral air conditioner comprises the following steps:
detecting the temperature t of the heat-dissipating piece to be dissipated after the integral air conditioner is started;
and the flow control element adjusts the flow of the first refrigerant flow path and the second refrigerant flow path according to the detected temperature t.
6. The control method of an integral type air conditioner according to claim 5, characterized in that the temperature t of the member to be cooled is detected every set time interval;
when the temperature T of the heat-dissipating member is less than or equal to a first set value T1, the flow control element reduces the flow of the first refrigerant flow path and increases the flow of the second refrigerant flow path;
when the temperature T of the heat-dissipating member to be dissipated is greater than or equal to a second set value T2, the flow control element reduces the flow of the second refrigerant flow path and increases the flow of the first refrigerant flow path;
when the temperature T of the heat-dissipating member satisfies T1< T < T2, the flow rate of the first refrigerant flow path and the flow rate of the second refrigerant flow path are kept unchanged.
7. The method as claimed in claim 5, wherein when the flow control member includes a first flow control valve and a second flow control valve, and the first flow control valve is connected in series to the first refrigerant flow path and the second flow control valve is connected in series to the second refrigerant flow path,
if the detected temperature T of the member to be cooled is less than or equal to a first set value T1, the opening degree of the first flow control valve is adjusted to O1, and the opening degree of the second flow control valve is adjusted to O3;
if the detected temperature T of the heat-to-be-dissipated element is greater than or equal to a second set value T2, adjusting the opening degree of the first flow control valve to O3, and adjusting the opening degree of the second flow control valve to O1;
and if the detected temperature T of the heat dissipation member to be dissipated meets T1< T < T2, the opening degrees of the first flow control valve and the second flow control valve are respectively adjusted to O2, wherein O1< O2< O3.
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| CN110848818A (en) * | 2018-08-21 | 2020-02-28 | 广东美的制冷设备有限公司 | Radiator and electronic control assembly having the same, air conditioner |
| CN109579244A (en) * | 2018-11-28 | 2019-04-05 | 广东美的制冷设备有限公司 | Air conditioner cooling control method and device, air conditioner and storage medium |
| CN110351987B (en) * | 2019-07-15 | 2024-02-23 | 珠海格力电器股份有限公司 | Radiator, controller, photovoltaic electric equipment and radiating method |
| CN112944580A (en) * | 2019-12-10 | 2021-06-11 | 杭州先途电子有限公司 | Heat dissipation device, air conditioner and control method and system of heat dissipation device of air conditioner |
| CN116887567A (en) * | 2020-08-26 | 2023-10-13 | 广东美的暖通设备有限公司 | Electric control box and air conditioning system |
| CN113513789A (en) * | 2021-07-20 | 2021-10-19 | 珠海三友环境技术有限公司 | Integrated water-cooling air conditioner |
| CN115234994A (en) * | 2022-07-19 | 2022-10-25 | 青岛海尔空调器有限总公司 | Air conditioning system and its control method, device, equipment and storage medium |
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Effective date of registration: 20260113 Address after: No.2000, guangqiong Road, economic and Technological Development Zone, Jiaxing City, Zhejiang Province, 314000 Patentee after: Zhejiang Midea Thermal Energy Technology Co.,Ltd. Country or region after: China Address before: 528311 refrigeration complex building, East District, Midea industrial city, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee before: GD MIDEA AIR-CONDITIONING EQUIPMENT Co.,Ltd. Country or region before: China Patentee before: MIDEA GROUP Co.,Ltd. |
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