CN114396657A - Distributed air supply device, refrigeration system and control method of refrigeration system - Google Patents

Distributed air supply device, refrigeration system and control method of refrigeration system Download PDF

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Publication number
CN114396657A
CN114396657A CN202210022989.0A CN202210022989A CN114396657A CN 114396657 A CN114396657 A CN 114396657A CN 202210022989 A CN202210022989 A CN 202210022989A CN 114396657 A CN114396657 A CN 114396657A
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CN
China
Prior art keywords
heat exchanger
air
pipe
throttling device
control valve
Prior art date
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Pending
Application number
CN202210022989.0A
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Chinese (zh)
Inventor
孙凯
薛寒冬
张亚国
黄尹峰
刘亚平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Application filed by Gree Green Refrigeration Technology Center Co Ltd of Zhuhai filed Critical Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority to CN202210022989.0A priority Critical patent/CN114396657A/en
Publication of CN114396657A publication Critical patent/CN114396657A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/10—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with separate supply lines and common return line for hot and cold heat-exchange fluids i.e. so-called "3-conduit" system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
    • 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
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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
    • F24F2110/20—Humidity

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a distributed air supply device, a refrigeration system and a control method thereof, wherein the distributed air supply device comprises an air duct machine and a suspended ceiling, the air duct machine is arranged in the suspended ceiling, a first air port and a second air port are arranged on the side surface of the suspended ceiling, the side surface is opposite to a wall and is connected with the ceiling, and the first air port and the second air port are arranged at intervals in the horizontal direction and/or the vertical direction; the tuber pipe machine includes: the air outlet can be communicated with the second air inlet to discharge air flow from the second air inlet, so that the air flow enters the shell through the first air inlet and the air return port in sequence, passes through the heat exchanger and the fan and is blown out from the air outlet and the second air inlet. According to the invention, openings are not needed on a plurality of surfaces, the structure is simple, and the installation, the disassembly and the maintenance are convenient; need not reduce the processing degree of difficulty at furred ceiling below opening, it is more hidden, not only pleasing to the eye but also save installation cost.

Description

Distributed air supply device, refrigeration system and control method of refrigeration system
Technical Field
The invention relates to the technical field of refrigeration, in particular to a distributed air supply device, a refrigeration system and a control method of the refrigeration system.
Background
In recent years, as the indoor unit of the household central air conditioner is installed in a suspended ceiling (also called a ducted air conditioner), the household central air conditioner has the advantages of attractive installation and small occupied space, and the market share is continuously increased. At present, the mainstream air pipe machine only has one air outlet, can not realize refrigeration horizontal air supply, air supply under heating, and user comfort experiences relatively poorly. For example, CN104697044B proposes a scheme with two air outlets, but the width of the unit needs to be increased, the engineering installation is complex, and the cost performance of the scheme is low. In addition, most of the existing main stream air pipe machine structures have air outlet and air return on two surfaces which are vertical to each other, so that the existing main stream air pipe machine is not attractive and installation cost is not saved. More and more users are demanding products with both supply and return air in one direction.
In addition, most of the existing main stream air pipe machine structure is provided with air outlet and air return on two surfaces which are vertical to each other, so that the existing main stream air pipe machine is not attractive and saves the installation cost; the invention provides a distributed air supply device, a refrigeration system and a control method thereof, which solve the technical problems that an air return opening and an air outlet are arranged at the lower end of a suspended ceiling, so that a user cannot be effective and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects of complex structure, inconvenient installation and disassembly and maintenance of the air duct machine in the prior art, such as openings on a plurality of surfaces of the shell, so as to provide the distributed air supply device, the refrigeration system and the control method thereof.
In order to solve the problems, the invention provides a distributed air supply device which comprises an air duct machine and a suspended ceiling, wherein the air duct machine is arranged inside the suspended ceiling, a first air opening and a second air opening are arranged on the side surface of the suspended ceiling, the side surface is opposite to a wall and is connected with the ceiling, and the first air opening and the second air opening are arranged at intervals in the horizontal direction and/or the vertical direction;
the tuber pipe machine includes: the air outlet can be communicated with the second air inlet to discharge air flow from the second air inlet, so that the air flow enters the shell through the first air inlet and the air return inlet in sequence, passes through the heat exchanger and the fan and is blown out from the air outlet and the second air inlet.
In some embodiments, the air return opening includes a lower air return opening and a rear air return opening, the lower air return opening is disposed at a lower end of the housing, the rear air return opening is disposed at an end of the housing opposite to a wall, a first preset distance is provided between the lower air return opening and an inside of a lower end of the ceiling, a second preset distance is provided between the rear air return opening and the wall, and an air flow enters an inside of the ceiling through the first air return opening and sequentially reaches a lower portion of the housing and a rear portion of the housing.
In some embodiments, the heat exchanger includes a first heat exchanger and a second heat exchanger, the first heat exchanger can suck air from the air return opening, the second heat exchanger can suck air from the air return opening, in the dehumidification mode, the first heat exchanger can heat, the second heat exchanger can cool, and air cooled by the second heat exchanger and air heated by the first heat exchanger form mixed air.
In some embodiments, when the air return opening includes a lower air return opening and a rear air return opening, the first heat exchanger is opposed to the lower air return opening to enable air suction from the lower air return opening, and the second heat exchanger is opposed to the rear air return opening to enable air suction from the rear air return opening.
In some embodiments, the heat exchanger further includes a third heat exchanger and an air outlet duct, the fan is disposed in a space surrounded by the first heat exchanger and the second heat exchanger, one end of the air outlet duct is communicated with the air outlet, and the other end of the air outlet duct extends to a preset distance away from the fan, so that air blown out by the fan can be guided into the air outlet duct, and the third heat exchanger is disposed in the air outlet duct.
In some embodiments, the fan is a cross-flow fan; and/or the third heat exchanger is arranged at the inlet of the air outlet duct; and/or the third heat exchanger is a microchannel heat exchanger.
In some embodiments, the air outlet is connected with the second air inlet through a connecting part; a preset gap is formed between the first air opening and the shell.
The present invention also provides a refrigeration system comprising the distributed air supply apparatus of any one of the above, further comprising:
the air conditioner comprises a compressor, an outdoor heat exchanger, a first pipe, a second pipe and a third pipe, wherein one end of the first pipe can be communicated with a discharge end of the compressor, one end of the second pipe can be communicated with a discharge end or a suction end of the compressor, and one end of the third pipe can also be communicated with the suction end or the discharge end of the compressor;
the other end of the first pipe is communicated with the other end of the second pipe and then communicated with the other end of the third pipe, and the outdoor heat exchanger is arranged on the third pipe;
when the heat exchanger comprises a first heat exchanger, a second heat exchanger and a third heat exchanger, the third heat exchanger and the first throttling device are arranged on the first pipe, the second heat exchanger and the third throttling device are arranged on the second pipe, and the first heat exchanger can be connected between the first pipe and the second pipe or connected to the second pipe.
In some embodiments, further comprising a first branch and a second branch, the first branch having a segment communicating at one end to the second tube and to the third tube, one end of the second branch is communicated to the first pipe and is communicated with the exhaust end of the compressor, the other end of the second branch is communicated to the second pipe and is communicated with the exhaust end or the suction end of the compressor, the other end of the first branch is communicated to the second branch to form a connection end, the second branch comprises a first pipe section and a second pipe section which are separated by the connection end, the first pipe section is connected with the first pipe, the second pipe section is connected with the second pipe, the first pipe section is provided with a first control valve, and a second control valve is arranged on the second pipe section, and the first branch is provided with the first heat exchanger and a second throttling device.
In some embodiments, a main throttle valve is disposed on the third pipe, and the refrigeration system further includes a four-way valve a and a four-way valve B, four ends of the four-way valve a being respectively communicated to the discharge end of the compressor, the second pipe, the suction end of the compressor, and four ends of the four-way valve B being respectively communicated to the discharge end of the compressor, the third pipe, the suction end of the compressor, and the suction end of the compressor.
The invention also provides a control method of the refrigeration system, which comprises the following steps: a detection step of detecting outdoor temperature, indoor temperature and indoor humidity;
a judging step of judging an operation mode according to the outdoor temperature, the indoor temperature and the indoor humidity;
a control step of controlling to open at least one of a first heat exchanger, a second heat exchanger and a third heat exchanger for heating when the heat exchanger comprises the first heat exchanger, the second heat exchanger and the third heat exchanger and when the heat exchanger is judged to be in a heating mode; when the mode is judged to be a refrigeration mode, controlling to open at least one of the first heat exchanger and the second heat exchanger for refrigeration; and when the dehumidification mode is judged, the first heat exchanger is controlled to be opened for heating, the second heat exchanger is controlled to refrigerate, and the third heat exchanger is controlled to heat.
In some embodiments, when the first control valve, the second control valve, the first throttling device, the second throttling device, and the third throttling device are included and it is desired to operate in the heating mode:
when the indoor temperature T is within a range T2 which is more than T and less than T1, the first control valve and the second control valve are controlled to be closed, the first throttling device is controlled to be closed, the third throttling device is controlled to be opened, and only the second heat exchanger is used for heating;
when the indoor temperature T is in a range T3 < T2, controlling the first control valve to be closed, controlling the second control valve to be opened, controlling the first throttling device to be closed, controlling the second throttling device and the third throttling device to be opened, and heating through the first heat exchanger and the second heat exchanger;
when the indoor temperature T is in a range T4 < T3, controlling the first control valve to be closed or opened, controlling the second control valve to be opened, controlling the first throttling device to be opened, controlling the second throttling device and the third throttling device to be opened, and jointly heating through the first heat exchanger, the second heat exchanger and the third heat exchanger;
wherein T1, T2, T3 and T4 are all constants, and T4 < T3 < T2 < T1.
In some embodiments, when the first control valve, the second control valve, the first throttling device, the second throttling device, and the third throttling device are included and it is desired to operate in a cooling mode:
when the indoor temperature T is in a range T5 < T6, controlling the first control valve to be closed and the second control valve to be closed, controlling the first throttling device and the second throttling device to be closed, and controlling the third throttling device to be opened to refrigerate only through the second heat exchanger;
and when the indoor temperature T is within a range T6 and is not more than T, controlling the first control valve to be closed, controlling the second control valve to be opened, controlling the first throttling device to be closed, controlling the second throttling device and the third throttling device to be opened, and performing refrigeration through the first heat exchanger and the second heat exchanger together.
In some embodiments, when the first control valve, the second control valve, the first throttling device, the second throttling device, and the third throttling device are included and it is desired to operate in the dehumidification mode:
and controlling the first control valve to be opened, controlling the second control valve to be closed, controlling the first throttling device, the second throttling device and the third throttling device to be opened, refrigerating through the second heat exchanger, heating through the first heat exchanger and heating through the third heat exchanger.
The distributed air supply device, the refrigeration system and the control method thereof provided by the invention have the following beneficial effects:
1. according to the invention, the first air port and the second air port are arranged on the side surface of the suspended ceiling, so that the first air port is communicated with the air return port of the casing of the air duct machine to return air, the second air port is communicated with the air outlet of the casing of the air duct machine to exhaust air, front air exhaust and front air return can be effectively realized, the air inlet of the distributed air supply device only enters air from the first air port of the suspended ceiling, the air outlet only exits from the second air port of the suspended ceiling, and no opening is needed on multiple surfaces, so that the structure is simple, and the installation, the disassembly and the maintenance are convenient; and need not reduce the processing degree of difficulty at furred ceiling below opening, more hidden, user's furred ceiling lower extreme does not have the opening, not only beautifully but also saves installation cost, does not influence customer's fitment style. The space below the unit can be well utilized, and the lower heat exchanger can be increased due to the fact that lower return air and lower outlet air are not adopted, so that the heat exchange area is increased.
2. The invention realizes comfortable dehumidification by controlling the heat exchange states of the three groups of heat exchangers, comprises a first dehumidification heating heat exchanger and a second dehumidification cooling heat exchanger, and the third dehumidification temperature-regulating heat exchanger is a micro-channel heat exchanger, so that the operation condition in a dehumidification mode can be regulated according to real-time temperature and humidity, and the dehumidification comfort level is improved. Because the three-pipe refrigerant flowing system is adopted, the dehumidification and temperature regulation heat exchanger III belongs to the microchannel heat exchanger, the unit adopts the three-pipe refrigerant flowing system, the first heat exchanger and the second heat exchanger can be connected in parallel or the first heat exchanger and the dehumidification and temperature regulation element (the third heat exchanger) can be connected in parallel, the system is accessed under the dehumidification mode, the heat exchanger is always in the heating mode, compared with the traditional dehumidification mode, condensation (due to the third heat exchanger) can not be generated, and compared with the traditional fin heat exchanger, the heat exchange efficiency is improved by 30 percent, the air resistance is reduced by 10 percent (the setting of the microchannel heat exchanger), and the dehumidification at higher temperature in winter is realized. The first heat exchanger can realize hot and cold mixed air in a dehumidification mode, and the comfort of indoor air outlet in the dehumidification mode is improved. The energy efficiency can be improved by adjusting the refrigerating mode and the heating mode according to different working conditions.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a distributed blower of the present invention;
FIG. 2 is a side view of the ceiling return air and outlet air shafts of the distributed air supply apparatus of the present invention;
FIG. 3 is a schematic internal cross-sectional view of the ducted air conditioner of the present invention;
FIG. 4 is a system diagram of a heating mode with a three-pipe outdoor unit according to the present invention;
FIG. 5 is a system diagram of the present invention with a three-tube outdoor unit refrigeration mode;
FIG. 6 is a system diagram of the present invention with a dehumidification mode of a three-pipe outdoor unit;
FIG. 7 is a control logic diagram of the refrigeration system of the present invention in a heating mode;
FIG. 8 is a control logic diagram of the refrigeration system of the present invention in a refrigeration mode;
fig. 9 is a control logic diagram of the refrigeration system of the present invention in dehumidification mode.
The reference numerals are represented as:
1. a housing; 2. a fan; 3. a heat exchanger; 31. a first heat exchanger; 32. a second heat exchanger; 33. a third heat exchanger; 4. an air return opening; 41. a lower return air inlet; 42. a rear return air inlet; 5. an air outlet; 6. an air outlet duct; 7. a ducted air conditioner; 8. a suspended ceiling; 81. a first tuyere; 82. a second tuyere; 9. a connecting portion; 10. a compressor; 11. an outdoor heat exchanger; 101. a first tube; 102. a second tube; 103. a third tube; 104. a first branch; 105. a second branch circuit; 105a, a first pipe section; 105b, a second tube section; 12. a first throttling device; 13. a second throttling device; 14. a third throttling means; 15. a first control valve; 16. a second control valve; 17. a main throttle valve; 18. a four-way valve A; 19. a four-way valve B; 20. oil content; 21. and (4) gas component.
Detailed Description
As shown in fig. 1 to 3, the present invention provides a distributed air supply device, which includes a ducted air conditioner 7 and a suspended ceiling 8, wherein the ducted air conditioner 7 is disposed inside the suspended ceiling 8, a side surface of the suspended ceiling 8 is provided with a first air opening 81 and a second air opening 82, the side surface is opposite to a wall and is connected to the ceiling, and the first air opening 81 and the second air opening 82 are disposed at intervals in a horizontal direction and/or a vertical direction;
the tuber pipe machine includes: the air conditioner comprises a machine shell 1, a fan 2, a heat exchanger 3, an air return opening 4 and an air outlet 5, wherein the air return opening 4 can be communicated with a first air opening 81 to suck air from the first air opening 81, and the air outlet 5 can be communicated with a second air opening 82 to discharge air flow from the second air opening 82, so that the air flow enters the machine shell 1 through the first air opening 81 and the air return opening 4 in sequence, passes through the heat exchanger 3 and the fan 2 and is blown out from the air outlet 5 and the second air opening 82.
According to the invention, the first air port and the second air port are arranged on the side surface of the suspended ceiling, so that the first air port is communicated with the air return port of the casing of the air duct machine to return air, the second air port is communicated with the air outlet of the casing of the air duct machine to exhaust air, front air exhaust and front air return can be effectively realized, the air inlet of the distributed air supply device only enters air from the first air port of the suspended ceiling, the air outlet only exits from the second air port of the suspended ceiling, and no opening is needed on multiple surfaces, so that the structure is simple, and the installation, the disassembly and the maintenance are convenient; and need not reduce the processing degree of difficulty at furred ceiling below opening, more hidden, user's furred ceiling lower extreme does not have the opening, not only beautifully but also saves installation cost, does not influence customer's fitment style. The space below the unit can be well utilized, and the lower heat exchanger can be increased due to the fact that lower return air and lower outlet air are not adopted, so that the heat exchange area is increased.
In some embodiments, the air return opening 4 includes a lower air return opening 41 and a rear air return opening 42, the lower air return opening 41 is disposed at the lower end of the housing 1, the rear air return opening 42 is disposed at the end of the housing 1 opposite to the wall, the lower air return opening 41 is spaced from the inside of the lower end of the suspended ceiling 8 by a first preset distance, the rear air return opening 42 is spaced from the wall by a second preset distance, and the air flow enters the inside of the suspended ceiling 8 through the first air opening 81 and sequentially reaches the lower portion of the housing 1 and the rear portion of the housing 1. The air return opening is an optimal structure form of the air return opening, namely, the air flow entering the ceiling from the first air opening of the ceiling can enter the air pipe machine through the lower air return opening and can also enter the air pipe machine through the rear air return opening, so that the air return area is effectively increased, and the air return amount is increased.
In some embodiments, the heat exchanger 3 includes a first heat exchanger 31 and a second heat exchanger 32, the first heat exchanger 31 can draw air from the air return opening 4, the second heat exchanger 32 can draw air from the air return opening 4, in the dehumidification mode, the first heat exchanger 31 can heat, the second heat exchanger 32 can cool, and the air cooled by the second heat exchanger 32 and the air heated by the first heat exchanger 31 form a mixed air. This is a preferable configuration of the heat exchanger of the present invention, that is, the first heat exchanger and the second heat exchanger, and in the dehumidification mode, the first heat exchanger can perform heating and can heat cooled air, and the second heat exchanger can perform cooling and remove moisture, thereby achieving air mixing and improving the temperature comfort of dehumidified air blown into a room.
In some embodiments, when the air return opening 4 includes a lower air return opening 41 and a rear air return opening 42, the first heat exchanger 31 is opposite to the lower air return opening 41 to enable air suction from the lower air return opening 41, and the second heat exchanger 32 is opposite to the rear air return opening 42 to enable air suction from the rear air return opening 42. The first heat exchanger is positioned at the lower part of the air pipe machine so as to be opposite to the lower air return opening and suck air from the lower air return opening, and the second heat exchanger is positioned at the rear part of the air pipe machine so as to be opposite to the rear air return opening and suck air from the rear air return opening, so that two heat exchangers are formed to intake air from different air return openings, the heat exchange amount in a cooling and heating mode is improved, and the comfort is improved; and the air current mixes with the air after the first heat exchanger heats again after passing through the cooling of second heat exchanger under the dehumidification mode to effectively improve the comfort level of air, and effectual dehumidification.
As shown in fig. 2, the air flow distribution of the unit using ceiling return air is schematically illustrated. Preferably, the unit returns air through partial grids outside the air outlet, and the area of the grids installed in engineering is larger than that of the outlet air.
In some embodiments, the heat exchanger 3 further includes a third heat exchanger 33 and an air outlet duct 6, the fan 2 is disposed in a space surrounded by the first heat exchanger 31 and the second heat exchanger 32, one end of the air outlet duct 6 is communicated with the air outlet 5, and the other end of the air outlet duct extends to a preset distance away from the fan 2, so as to guide the air blown out by the fan 2 into the air outlet duct 6, and the third heat exchanger 33 is disposed in the air outlet duct 6, and in a dehumidification mode, the third heat exchanger 33 can produce heat. The third heat exchanger is arranged in the air outlet duct, so that the air subjected to heat exchange by the first heat exchanger and the second heat exchanger can be heated by the third heat exchanger, the temperature adjustment effect on the dehumidified air is realized, and the temperature comfort of the air blown into the room is further improved.
In some embodiments, the fan 2 is a cross-flow fan blade; and/or the third heat exchanger 33 is arranged at the inlet of the air outlet duct 6; and/or the third heat exchanger 33 is a microchannel heat exchanger. The invention realizes comfortable dehumidification by controlling the heat exchange states of the three groups of heat exchangers, comprises a first dehumidification heating heat exchanger and a second dehumidification cooling heat exchanger, and the third dehumidification temperature-regulating heat exchanger is a micro-channel heat exchanger, so that the operation condition in a dehumidification mode can be regulated according to real-time temperature and humidity, and the dehumidification comfort level is improved. Because a three-pipe refrigerant flowing system is adopted, and the dehumidification and temperature regulation heat exchanger III belongs to the micro-channel heat exchanger, compared with the traditional fin heat exchanger, the heat exchange efficiency is improved by 30%, the wind resistance is reduced by 10% (the micro-channel heat exchanger is arranged), and the dehumidification at higher temperature in winter is realized. The first heat exchanger can realize hot and cold mixed air in a dehumidification mode, and the comfort of indoor air outlet in the dehumidification mode is improved. The energy efficiency can be improved by adjusting the refrigerating mode and the heating mode according to different working conditions.
Preferably, the unit adopts cross-flow fan blades, the fan blades are arranged in front of the two groups of heat exchangers along the air flow direction, the temperature-adjusting heat exchanger is a flat tube micro-channel heat exchanger at an air inlet, and compared with the traditional fin heat exchanger, the unit has good ventilation and high heat exchange efficiency. As shown in fig. 2, three heat exchanger of group arrange can compare in the centrifugal fan blade according to this design, and three heat exchangers of group are located the homonymy and arrange, and the heat exchanger of different modes can influence heat exchange efficiency each other under the inevitable dehumidification mode, and the air permeability is not good, easily produces the noise (be located fan air-out front side, three heat exchangers of group must have along the direction of blowing overlap region, and windage stack increases, can produce serious noise problem).
The third heat exchanger is positioned at the downstream of the fan and fully utilizes the space of the air duct machine, and is in a heating mode in the heating and dehumidifying modes, so that condensation can not be generated, and the third heat exchanger can be placed in the front; the micro-channel heat exchanger can reduce wind resistance while improving heat exchange efficiency, and is favorable for reducing noise.
In some embodiments, the air outlet 5 is connected with the second air inlet 82 through a connecting portion 9; a preset gap is formed between the first air port 81 and the casing 1. According to the invention, the air blown out from the air outlet can be effectively ensured to be directly blown out through the second air port through the connecting part between the air outlet and the second air port, and can not enter the ceiling to prevent the air from being mixed with the return air, and the preset gap between the first air port and the casing can enable the return air to enter the ceiling to increase the area of the return air, so that the return air enters the air pipe machine through the lower return air port and the rear return air port to increase the heat exchange quantity.
Preferably, the horizontal air outlet of the unit is hermetically connected with the suspended ceiling through a flexible material (such as canvas).
Preferably, a certain gap is formed between the lower air return opening of the unit and the bottom of the unit, so that the reliability of the lower air return opening is ensured. The gap is greater than 15 mm.
As shown in fig. 4-6, the present invention further provides a refrigeration system comprising the distributed air supply apparatus of any one of the preceding claims, further comprising:
the outdoor heat exchanger comprises a compressor 10, an outdoor heat exchanger 11, a first pipe 101, a second pipe 102 and a third pipe 103, wherein one end of the first pipe 101 can be communicated with a discharge end of the compressor 10, one end of the second pipe 102 can be communicated with a discharge end or a suction end of the compressor 10, and one end of the third pipe 103 can also be communicated with a suction end or a discharge end of the compressor 10;
the other end of the first pipe 101 is communicated with the other end of the second pipe 102 and then communicated with the other end of the third pipe 103, and the outdoor heat exchanger 11 is arranged on the third pipe 103;
when the heat exchanger 3 comprises a first heat exchanger 31, a second heat exchanger 32 and a third heat exchanger 33, the first pipe 101 is provided with the third heat exchanger 33 and the first throttling device 12, the second pipe 102 is provided with the second heat exchanger 32 and the third throttling device 14, and the first heat exchanger 31 can be connected between the first pipe 101 and the second pipe 102 or connected to the second pipe 102.
The invention adopts a three-pipe refrigerant flowing system, the dehumidification and temperature regulation heat exchanger III belongs to a micro-channel heat exchanger, the unit adopts the three-pipe refrigerant flowing system, the parallel connection of a first heat exchanger and a second heat exchanger or the parallel connection of the first heat exchanger and a dehumidification and temperature regulation element (a third heat exchanger) can be realized, the system is connected in a dehumidification mode and is always in a heating mode, compared with the traditional dehumidification mode, condensation cannot be generated (due to the third heat exchanger), the heat exchange efficiency is improved by 30% and the wind resistance is reduced by 10% compared with the traditional fin heat exchanger, and the dehumidification at higher temperature in winter is realized.
In some embodiments, the system further comprises a first branch 104 and a second branch 105, wherein one end of the first branch 104 is connected to the second pipe 102 and is communicated with the third pipe 103, one end of the second branch 105 is connected to the first pipe 101 and is communicated with the exhaust end of the compressor 10, the other end of the second branch is connected to the second pipe 102 and is communicated with the exhaust end or the suction end of the compressor 10, the other end of the first branch 104 is connected to the second branch 105 to form a connection end, the second branch 105 comprises a first pipe section 105a and a second pipe section 105b which are separated by the connection end, the first pipe section 105a is connected with the first pipe 101, the second pipe section 105b is connected with the second pipe 102, the first pipe section 105a is provided with a first control valve 15, the second pipe section 105b is provided with a second control valve 16, the first branch 104 is provided with the first heat exchanger 31 and a second throttling device 13. The first heat exchanger can be effectively connected between the first pipe and the second pipe and connected to the second pipe in parallel according to the operation mode through the first branch and the second branch, so that the control of two different modes of a cooling mode, the control of three different modes of a heating mode and the effective control of dehumidification and temperature regulation in a dehumidification mode are effectively realized, the indoor dehumidification comfort degree is improved, and the indoor temperature is prevented from being too low.
In some embodiments, the third pipe 103 is provided with a main throttle valve 17, the refrigeration system further comprises a four-way valve a18 and a four-way valve B19, four ends of the four-way valve a18 can be respectively communicated to the discharge end of the compressor 10, the second pipe 102, the suction end of the compressor 10 and the suction end of the compressor, and four ends of the four-way valve B19 can be respectively communicated to the discharge end of the compressor 10, the third pipe 103, the suction end of the compressor 10 and the suction end of the compressor. The invention is a further preferable structure form of the refrigerating system, namely, the throttling and pressure reducing effects between the indoor unit and the outdoor unit can be realized through the main throttle valve, and the three-pipe system and the compressor, and the effective connection between the indoor heat exchangers and the outdoor heat exchanger can be effectively realized through the arrangement of the four-way valve A and the four-way valve B, so that the control of various control forms of an indoor refrigerating mode, various control forms of an indoor heating mode and an indoor dehumidifying mode can be met.
The present invention also provides a control method of a refrigeration system according to any one of the preceding claims, as shown in fig. 7 to 9, characterized in that: the method comprises the following steps: a detection step of detecting outdoor temperature, indoor temperature and indoor humidity;
a judging step of judging an operation mode according to the outdoor temperature, the indoor temperature and the indoor humidity;
a control step of controlling to open at least one of the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 33 for heating when the heat exchanger 3 includes the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 33 and when the heating mode is determined; when the mode is judged to be a cooling mode, controlling to open at least one of the first heat exchanger 31 and the second heat exchanger 32 for cooling; and when the dehumidification mode is judged, the first heat exchanger 31 is controlled to be opened for heating, the second heat exchanger 32 is controlled to be cooled, and the third heat exchanger 33 is controlled to be heated.
The invention realizes comfortable dehumidification by controlling the heat exchange states of the three groups of heat exchangers, comprises a first dehumidification heating heat exchanger and a second dehumidification cooling heat exchanger, and the third dehumidification temperature-regulating heat exchanger is a micro-channel heat exchanger, so that the operation condition in a dehumidification mode can be regulated according to real-time temperature and humidity, and the dehumidification comfort level is improved. Because the three-pipe refrigerant flowing system is adopted, the dehumidification and temperature regulation heat exchanger III belongs to the microchannel heat exchanger, the unit adopts the three-pipe refrigerant flowing system, the first heat exchanger and the second heat exchanger can be connected in parallel or the first heat exchanger and the dehumidification and temperature regulation element (the third heat exchanger) can be connected in parallel, the system is accessed under the dehumidification mode, the heat exchanger is always in the heating mode, compared with the traditional dehumidification mode, condensation (due to the third heat exchanger) can not be generated, and compared with the traditional fin heat exchanger, the heat exchange efficiency is improved by 30 percent, the air resistance is reduced by 10 percent (the setting of the microchannel heat exchanger), and the dehumidification at higher temperature in winter is realized. The first heat exchanger can realize hot and cold mixed air in a dehumidification mode, and the comfort of indoor air outlet in the dehumidification mode is improved. The energy efficiency can be improved by adjusting the refrigerating mode and the heating mode according to different working conditions.
In some embodiments, when the first control valve 15, the second control valve 16, the first throttling means 12, the second throttling means 13 and the third throttling means 14 are included and it is desired to operate in the heating mode:
and when the indoor temperature T is in the range T2 < T1, controlling the first control valve 15 and the second control valve 16 to be closed, controlling the first throttling device 12 to be closed, controlling the third throttling device 14 to be opened, and only heating through the second heat exchanger 32;
when the indoor temperature T is in a range T3 < T2, controlling the first control valve 15 to be closed, controlling the second control valve 16 to be opened, controlling the first throttling device 12 to be closed, controlling the second throttling device 13 and the third throttling device 14 to be opened, and heating is carried out through the first heat exchanger 31 and the second heat exchanger 32;
when the indoor temperature T is in a range T4 < T3, controlling the first control valve 15 to be closed or opened, controlling the second control valve 16 to be opened, controlling the first throttling device 12 to be opened, controlling the second throttling device 13 and the third throttling device 14 to be opened, and jointly heating through the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 33;
wherein T1, T2, T3 and T4 are all constants, and T4 < T3 < T2 < T1.
The three-tube refrigeration system has three different control modes in the heating mode, and as shown in fig. 4, if the third heat exchanger is connected to the system to always keep heating, no condensed water appears at the air port. In the heating mode, the electromagnetic valve B (a second control valve 16) is kept connected, the first heat exchanger and the second heat exchanger are connected into the system in parallel, the first throttling device 12 can be connected by improving the heating efficiency, and the three groups of heat exchangers are connected into the system in parallel; the heating intensity is improved, so that one heat exchanger, two heat exchangers and three heat exchangers are selected to be adopted for heating according to different indoor temperatures, and the indoor heating comfort is improved.
In some embodiments, when the first control valve 15, the second control valve 16, the first throttling device 12, the second throttling device 13 and the third throttling device 14 are included and it is desired to operate in the cooling mode:
and when the indoor temperature T is in a range T5 < T6, controlling the first control valve 15 to be closed and the second control valve 16 to be closed, controlling the first throttling device 12 and the second throttling device 13 to be closed, controlling the third throttling device 14 to be opened, and only refrigerating through the second heat exchanger 32;
when the indoor temperature T is within a range T6 or less, the first control valve 15 is controlled to be closed, the second control valve 16 is controlled to be opened, the first throttling device 12 is controlled to be closed, the second throttling device 13 and the third throttling device 14 are controlled to be opened, and the first heat exchanger 31 and the second heat exchanger 32 perform refrigeration together.
As shown in fig. 5, in the cooling mode, the solenoid valve a (the first control valve 15) and the first throttling device 12 (EX 1) are kept closed, the third heat exchanger does not participate in heat exchange, and the solenoid valve B (the second control valve 16) controls whether the first heat exchanger is connected to the system, so that one heat exchanger, two heat exchangers and three heat exchangers are selected to perform cooling according to different indoor temperatures, thereby improving the indoor cooling comfort.
In some embodiments, when the first control valve 15, the second control valve 16, the first throttling device 12, the second throttling device 13 and the third throttling device 14 are included and it is desired to operate in the dehumidification mode:
the first control valve 15 is controlled to be opened, the second control valve 16 is controlled to be closed, and the first throttling device 12, the second throttling device 13 and the third throttling device 14 are controlled to be opened, so that cooling is performed through the second heat exchanger 32, heating is performed through the first heat exchanger 31, and heating is performed through the third heat exchanger 33.
The control mode of the three-pipe refrigeration system is in a dehumidification mode, as shown in fig. 6, in the dehumidification mode, the electromagnetic valve a (the first control valve 15) is switched on, the electromagnetic valve B (the second control valve 16) is switched off, the first throttling device 12 (EX 1) is switched on, the third heat exchanger participates in heat exchange, the first heat exchanger is in a heating mode, the second heat exchanger is in a refrigeration mode, air mixing is completed behind the fan blades, dehumidification intensity is adjusted through the third throttling device 14, temperature constancy after air mixing is achieved, heating of the third heat exchanger is achieved, constant temperature is further adjusted and increased, and comfortable dehumidification is achieved by the three heat exchangers.
As above novel tuber pipe machine can realize whole front air-out and return air, accords with human travelling comfort and experiences, has advantages such as the outward appearance is pleasing to the eye, the practicality is strong.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (14)

1. A distributed air supply device is characterized in that: the air duct machine comprises an air duct machine (7) and a suspended ceiling (8), wherein the air duct machine (7) is arranged inside the suspended ceiling (8), a first air opening (81) and a second air opening (82) are arranged on the side surface of the suspended ceiling (8), the side surface is opposite to a wall and is connected with the ceiling, and the first air opening (81) and the second air opening (82) are arranged at intervals in the horizontal direction and/or the vertical direction;
the tuber pipe machine includes: the air conditioner comprises a machine shell (1), a fan (2), a heat exchanger (3), an air return opening (4) and an air outlet (5), wherein the air return opening (4) can be communicated with the first air opening (81) to suck air from the first air opening (81), the air outlet (5) can be communicated with the second air opening (82) to discharge air flow from the second air opening (82), so that the air flow sequentially passes through the first air opening (81) and the air return opening (4) to enter the machine shell (1) and passes through the heat exchanger (3) and the fan (2) to blow out from the air outlet (5) and the second air opening (82).
2. The distributed air supply apparatus of claim 1, wherein:
the air return opening (4) comprises a lower air return opening (41) and a rear air return opening (42), the lower air return opening (41) is arranged at the lower end of the machine shell (1), the rear air return opening (42) is arranged at one end, opposite to the wall, of the machine shell (1), the lower air return opening (41) and the inner portion of the lower end of the suspended ceiling (8) are provided with a first preset distance interval, the rear air return opening (42) and the wall are provided with a second preset distance interval, and air flow enters the inner portion of the suspended ceiling (8) through the first air opening (81) and sequentially reaches the lower portion of the machine shell (1) and the rear portion of the machine shell (1).
3. The distributed air supply apparatus according to claim 1 or 2, wherein:
the heat exchanger (3) comprises a first heat exchanger (31) and a second heat exchanger (32), the first heat exchanger (31) can be used for sucking air from the air return opening (4), the second heat exchanger (32) can be used for sucking air from the air return opening (4), the first heat exchanger (31) can be used for heating in a dehumidification mode, the second heat exchanger (32) can be used for refrigerating, and air refrigerated by the second heat exchanger (32) and air heated by the first heat exchanger (31) form mixed air.
4. The distributed air supply apparatus of claim 3, wherein:
when the air return opening (4) comprises a lower air return opening (41) and a rear air return opening (42), the first heat exchanger (31) is opposite to the lower air return opening (41) so as to be capable of sucking air from the lower air return opening (41), and the second heat exchanger (32) is opposite to the rear air return opening (42) so as to be capable of sucking air from the rear air return opening (42).
5. The distributed air supply apparatus of claim 3, wherein:
the heat exchanger (3) further comprises a third heat exchanger (33) and an air outlet duct (6), the fan (2) is arranged in a space surrounded by the first heat exchanger (31) and the second heat exchanger (32), one end of the air outlet duct (6) is communicated with the air outlet (5), the other end of the air outlet duct extends to a preset distance from the fan (2) at an interval, so that air blown out by the fan (2) can be guided into the air outlet duct (6), the third heat exchanger (33) is arranged in the air outlet duct (6), and the third heat exchanger (33) can heat in a dehumidification mode.
6. The distributed air supply apparatus of claim 5, wherein:
the fan (2) is a cross-flow fan blade; and/or the third heat exchanger (33) is arranged at the inlet of the air outlet duct (6); and/or the third heat exchanger (33) is a microchannel heat exchanger.
7. The distributed air supply apparatus of any of claims 1-6, wherein:
the air outlet (5) is connected with the second air port (82) through a connecting part (9); a preset gap is formed between the first air opening (81) and the machine shell (1).
8. A refrigeration system, characterized by: the distributed air supply apparatus comprising any of claims 1-7, further comprising:
the air conditioner comprises a compressor (10), an outdoor heat exchanger (11), a first pipe (101), a second pipe (102) and a third pipe (103), wherein one end of the first pipe (101) can be communicated with the exhaust end of the compressor (10), one end of the second pipe (102) can be communicated with the exhaust end or the suction end of the compressor (10), and one end of the third pipe (103) can also be communicated with the suction end or the exhaust end of the compressor (10);
the other end of the first pipe (101) is communicated with the other end of the second pipe (102) and then is communicated with the other end of the third pipe (103), and the outdoor heat exchanger (11) is arranged on the third pipe (103);
when the heat exchanger (3) comprises a first heat exchanger (31), a second heat exchanger (32) and a third heat exchanger (33), the first pipe (101) is provided with the third heat exchanger (33) and the first throttling device (12), the second pipe (102) is provided with the second heat exchanger (32) and the third throttling device (14), and the first heat exchanger (31) can be connected between the first pipe (101) and the second pipe (102) or connected to the second pipe (102).
9. The refrigeration system of claim 8, wherein:
further comprising a first branch (104) and a second branch (105), wherein one end of the first branch (104) is communicated to the second pipe (102) and communicated with the third pipe (103), one end of the second branch (105) is communicated to the first pipe (101) and communicated with the exhaust end of the compressor (10), the other end of the second branch is communicated to the second pipe (102) and communicated with the exhaust end or the suction end of the compressor (10), the other end of the first branch (104) is communicated to the second branch (105) to form an abutting end, the second branch (105) comprises a first pipe section (105a) and a second pipe section (105b) which are separated by the abutting end, the first pipe section (105a) is connected with the first pipe (101), and the second pipe section (105b) is connected with the second pipe (102), the first pipe section (105a) is provided with a first control valve (15), the second pipe section (105b) is provided with a second control valve (16), and the first branch (104) is provided with the first heat exchanger (31) and a second throttling device (13).
10. The refrigeration system of claim 8, wherein:
the third pipe (103) is provided with a main throttle valve (17), the refrigeration system further comprises a four-way valve A (18) and a four-way valve B (19), four ends of the four-way valve A (18) can be respectively communicated to an exhaust end of the compressor (10), the second pipe (102), a suction end of the compressor (10) and a suction end of the compressor, and four ends of the four-way valve B (19) can be respectively communicated to an exhaust end of the compressor (10), the third pipe (103), a suction end of the compressor (10) and a suction end of the compressor.
11. A control method of a refrigeration system according to any one of claims 8 to 10, characterized in that: the method comprises the following steps: a detection step of detecting outdoor temperature, indoor temperature and indoor humidity;
a judging step of judging an operation mode according to the outdoor temperature, the indoor temperature and the indoor humidity;
a control step of controlling to open at least one of a first heat exchanger (31), a second heat exchanger (32) and a third heat exchanger (33) for heating when the heat exchanger (3) comprises the first heat exchanger (31), the second heat exchanger (32) and the third heat exchanger (33) and when the heat exchanger is judged to be in a heating mode; when the mode is judged to be a cooling mode, controlling to open at least one of the first heat exchanger (31) and the second heat exchanger (32) for cooling; and when the dehumidification mode is judged, the first heat exchanger (31) is controlled to be opened for heating, the second heat exchanger (32) is controlled to refrigerate, and meanwhile, the third heat exchanger (33) is controlled to heat.
12. The control method according to claim 11, characterized in that:
when the first control valve (15), the second control valve (16), the first throttling device (12), the second throttling device (13) and the third throttling device (14) are included and the operation in the heating mode is required:
and when the indoor temperature T is in a range T2 < T1, controlling the first control valve (15) and the second control valve (16) to be closed, controlling the first throttling device (12) to be closed, controlling the third throttling device (14) to be opened, and only heating through the second heat exchanger (32);
when the indoor temperature T is in a range T3 < T2, controlling the first control valve (15) to be closed, controlling the second control valve (16) to be opened, controlling the first throttling device (12) to be closed, controlling the second throttling device (13) and the third throttling device (14) to be opened, and heating is carried out through the first heat exchanger (31) and the second heat exchanger (32);
when the indoor temperature T is in a range T4 < T3, controlling the first control valve (15) to be closed or opened, controlling the second control valve (16) to be opened, controlling the first throttling device (12) to be opened, controlling the second throttling device (13) and the third throttling device (14) to be opened, and jointly heating through the first heat exchanger (31), the second heat exchanger (32) and the third heat exchanger (33);
wherein T1, T2, T3 and T4 are all constants, and T4 < T3 < T2 < T1.
13. The control method according to claim 11, characterized in that:
when a first control valve (15), a second control valve (16), a first throttling device (12), a second throttling device (13) and a third throttling device (14) are included and it is desired to operate in a cooling mode:
and when the indoor temperature T is in a range T5 < T6, controlling the first control valve (15) to be closed and the second control valve (16) to be closed, controlling the first throttling device (12) and the second throttling device (13) to be closed, controlling the third throttling device (14) to be opened, and only refrigerating through the second heat exchanger (32);
when the indoor temperature T is within a range T6 and is not more than T, the first control valve (15) is controlled to be closed, the second control valve (16) is controlled to be opened, the first throttling device (12) is controlled to be closed, the second throttling device (13) and the third throttling device (14) are controlled to be opened, and the first heat exchanger (31) and the second heat exchanger (32) jointly refrigerate.
14. The control method according to claim 11, characterized in that:
when a first control valve (15), a second control valve (16), a first throttling device (12), a second throttling device (13) and a third throttling device (14) are included and it is desired to operate in a dehumidification mode:
the first control valve (15) is controlled to be opened, the second control valve (16) is controlled to be closed, the first throttling device (12), the second throttling device (13) and the third throttling device (14) are controlled to be opened, refrigeration is carried out through the second heat exchanger (32), heating is carried out through the first heat exchanger (31), and heating is carried out through the third heat exchanger (33).
CN202210022989.0A 2022-01-10 2022-01-10 Distributed air supply device, refrigeration system and control method of refrigeration system Pending CN114396657A (en)

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