CN110779081A - Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof - Google Patents
Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof Download PDFInfo
- Publication number
- CN110779081A CN110779081A CN201911161421.1A CN201911161421A CN110779081A CN 110779081 A CN110779081 A CN 110779081A CN 201911161421 A CN201911161421 A CN 201911161421A CN 110779081 A CN110779081 A CN 110779081A
- Authority
- CN
- China
- Prior art keywords
- evaporator
- temperature
- refrigerant
- low
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- 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
-
- 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
-
- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
A constant temperature and humidity air conditioning unit with a rapid dehumidification structure and a working method thereof belong to the technical field of air conditioners and comprise a compressor, a condenser structure, a throttling device, an evaporator, an indoor blower, a refrigerant passage and a shunt tee joint; the refrigerant passage comprises a refrigerant passage A, a refrigerant passage B, a refrigerant passage C, a refrigerant passage D and a refrigerant passage E; the evaporator comprises an upper evaporator and a lower evaporator; the air outlet end of the evaporator is provided with a refrigerant communicating pipe, and the middle of the refrigerant communicating pipe is provided with a one-way valve; the throttling device comprises an electronic expansion valve A and an electronic expansion valve B; an electromagnetic valve A is arranged on a refrigerant passage D from the shunt tee joint to the electronic expansion valve A, and an electromagnetic valve B is arranged on a refrigerant passage E from the shunt tee joint to the electronic expansion valve B. The invention has the beneficial effects that: simple structure, dehumidification are effectual, can not produce to freeze and frost, the effectual evaporating temperature that prevents is low excessively and causes the phenomenon of freezing and frosting, can satisfy the requirement of quick dehumidification simultaneously again.
Description
Technical Field
The invention relates to a constant-temperature and constant-humidity air conditioning unit and a working method thereof, in particular to a constant-temperature and constant-humidity air conditioning unit with a quick dehumidification structure and a working method thereof, and belongs to the technical field of air conditioners.
Background
The dehumidification principle of the air conditioning unit is to utilize the principle that water in the air can be condensed into water when meeting cold. When the refrigerant in the evaporator of the air conditioner is evaporated, a large amount of heat is absorbed to reduce the surface temperature of the evaporator greatly, so that the water vapor in the indoor air is liquefied into water when meeting cold, and the condensed water flows through the water outlet pipe and is discharged out of the room, so that part of the water in the room air is removed.
At present, the dehumidification mode of the constant temperature and humidity machine adopts full-cooling refrigeration dehumidification, the high dehumidification amount of the evaporation temperature of an evaporator is small in the dehumidification process, and a large amount of refrigeration amount is used for cooling air. When the temperature has stabilized, full cold dehumidification will necessitate running a large amount of re-thermoelectric heating to stabilize the temperature. This operation does not provide rapid dehumidification. And the use of thermoelectric heating can consume a significant amount of energy. In the conventional refrigeration operation, the latent cold quantity of the constant-temperature and constant-humidity air conditioning unit for dehumidification is low and is 20-30%, and the latent cold quantity of the machine room air conditioner is 5-9%.
The patent application with the application publication number of CN 103968619A and the application number of 2013100410196 and the invention name of air conditioner with quick dehumidification adds a heat exchanger which is arranged on the first refrigerant channel and the second refrigerant channel and can carry out secondary cooling to achieve the purpose of quick dehumidification. The above patent application of air conditioner with quick dehumidification makes the whole structure become complicated, increases the product volume and cost, and is not favorable for market competition.
Disclosure of Invention
The invention aims to overcome the defects of incapability of providing quick dehumidification, complex structure, overlarge volume and increased cost in the prior art, and provides a constant-temperature and constant-humidity air conditioning unit with a quick dehumidification structure, which can achieve the purposes of simple structure, good dehumidification effect, no icing and frosting, effective prevention of icing and frosting caused by overlow evaporation temperature and capability of meeting the requirement of quick dehumidification.
In order to achieve the aim, the invention adopts the technical scheme that: a constant temperature and humidity air conditioning unit with a quick dehumidification structure comprises a compressor, a condenser structure, a throttling device, an evaporator, an indoor blower and a refrigerant passage, wherein the indoor blower is arranged above the evaporator; the compressor, the throttling device and the evaporator form an indoor unit, the refrigerating device structure comprises an outdoor heat exchanger and an outdoor heat dissipation fan arranged on the outer side of the outdoor heat exchanger, and the outdoor heat exchanger and the outdoor heat dissipation fan form an outdoor unit; the outdoor heat exchanger comprises a heat exchanger inlet end and a heat exchanger outlet end; the refrigerant passage comprises a refrigerant passage A and a refrigerant passage B, and is connected from the air outlet end of the evaporator to the air suction end of the compressor through the refrigerant passage A, and is connected from the air outlet end of the compressor to the air inlet end of the heat exchanger through the refrigerant passage B;
the evaporator also comprises a flow-dividing tee joint, and the flow-dividing tee joint is arranged in front of the throttling device and the evaporator; the evaporator comprises an upper evaporator and a lower evaporator, a partition plate is arranged between the upper evaporator and the lower evaporator, the upper evaporator and the lower evaporator are arranged in an up-down overlapping mode through the partition plate, and the upper evaporator and the lower evaporator are symmetrical up and down by taking the partition plate as a center;
the air outlet end of the evaporator is provided with a refrigerant communicating pipe, the middle of the refrigerant communicating pipe is provided with a one-way valve, the refrigerant communicating pipe is divided into an upper half part of the refrigerant communicating pipe and a lower half part of the refrigerant communicating pipe by the one-way valve, the upper half part of the refrigerant communicating pipe is communicated with the air outlet end of the upper evaporator, and the lower half part of the refrigerant communicating pipe is communicated with the air outlet end of the lower evaporator;
the throttling device comprises an electronic expansion valve A and an electronic expansion valve B, wherein the electronic expansion valve A is arranged at the inlet end of the upper evaporator, and the electronic expansion valve B is arranged at the inlet end of the lower evaporator;
the refrigerant passage also comprises a refrigerant passage C, a refrigerant passage D and a refrigerant passage E; connecting the heat exchanger outlet end to a flow-dividing tee joint by a refrigerant passage C, connecting the flow-dividing tee joint to an electronic expansion valve A by a refrigerant passage D, and connecting the flow-dividing tee joint to an electronic expansion valve B by a refrigerant passage E, wherein the refrigerant passage D and the refrigerant passage E are connected in parallel;
an electromagnetic valve A is arranged on a refrigerant passage D from the shunt tee joint to the electronic expansion valve A, and an electromagnetic valve B is arranged on a refrigerant passage E from the shunt tee joint to the electronic expansion valve B.
The outdoor heat exchanger comprises copper pipes and aluminum fins, the outdoor heat exchanger is manufactured by mechanically expanding and binding the copper pipes and the aluminum fins in a sleeved mode, and the inner ring and the outer ring are respectively expanded and then are spliced together to be bent and molded; and after the outdoor heat exchanger is manufactured, performing an air tightness test, wherein the pressure is 4.3Mpa, and the fin spacing of the fins is 1.7 mm.
A stop valve A and a stop valve B are arranged on a refrigerant passage B from the air outlet end of the compressor to the air inlet end of the heat exchanger, the stop valve A is arranged indoors, and the stop valve B is arranged outdoors; a stop valve C and a stop valve D are arranged on a refrigerant passage C from the outlet end of the heat exchanger to the flow-dividing tee joint, the stop valve C is arranged outdoors, and the stop valve D is arranged indoors; the model numbers of the stop valves A and B are FJ16JK-3-NBHK-00, and the model numbers of the stop valves C and D are FJ13 JK-3-NBHK-00.
The product model of the compressor is ZR144KC-TFP, the product model of the outdoor heat dissipation fan is DS760C-190B4.EC, the product model of the shunt tee joint is a 16T-diameter copper tee joint, the product models of the electronic expansion valve A and the electronic expansion valve B are both DPF (S03)4.0C-01, and the product models of the electromagnetic valve A and the electromagnetic valve B are both 200RB7T 7.
An oil separator is arranged on the refrigerant passage B and between the suction end of the compressor at the outlet end of the heat exchanger and the stop valve A, and the oil separator separates lubricating oil in high-temperature and high-pressure refrigerant gas discharged by the compressor so as to ensure that the device can safely and efficiently operate; the product model of the oil separator is an crude oil separator AW 55877.
And a liquid storage device is arranged on the refrigerant passage C and between the suction end of the compressor and the stop valve C, the liquid storage device can play a role in buffering a refrigerant and can protect the compressor, and the product model of the liquid storage device is a liquid storage device CYQ-4.2.
And a drying filter is arranged on the refrigerant passage C and between the stop valve D and the shunt tee joint, the drying filter can filter impurities and has a purifying effect on the refrigerant medium, and the product model of the drying filter is a drying filter EK-165S.
And a gas-liquid separator is arranged on the refrigerant passage A and between the air outlet end of the evaporator and the air suction end of the compressor, the gas-liquid separator is used for treating gas containing a small amount of condensate to realize gas-phase purification of low-temperature and low-pressure refrigerant gas flowing from the air outlet end of the evaporator to the air suction end of the compressor, and the product model of the gas-liquid separator is QFQ-5.0.
The working method of the constant temperature and humidity air conditioning unit with the rapid dehumidification structure comprises 3 working modes:
(1) mode 1, i.e. the mode of operation for rapid dehumidification using the lower half of the evaporator: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, the electromagnetic valve A and the electronic expansion valve A are opened, and the electromagnetic valve B and the electronic expansion valve B are closed;
the compressor is started, the compressor compresses low-temperature low-pressure refrigerant gas input from the evaporator of the compressor into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is discharged from the air outlet end of the compressor, and lubricating oil in the high-temperature high-pressure refrigerant gas discharged by the compressor is separated through the oil separator along the refrigerant passage B; the high-temperature and high-pressure refrigerant gas passes through the stop valve A and the stop valve B, enters the heat exchanger from the air inlet end of the heat exchanger, is changed into normal-temperature and high-pressure refrigerant liquid, and is discharged from the outlet end of the heat exchanger; meanwhile, heat is discharged to the outdoor air environment through the forced convection of the outdoor heat dissipation fan;
the refrigerant liquid at normal temperature and high pressure continuously flows forwards along the refrigerant passage B and passes through the liquid storage device, so that the refrigerant has a buffering effect; then, the refrigerant passes through a refrigeration pressure switch which can control and protect pressure, passes through a stop valve C and a stop valve D forwards, flows through a drying filter, filters impurities in the refrigerant liquid, and then flows forwards to reach a shunt tee;
the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee joint, passes through the electromagnetic valve A along the refrigerant passage D, reaches the electronic expansion valve A, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, the low-temperature low-pressure refrigerant liquid enters the lower evaporator, absorbs the heat in the air in an area of about 1/2 of the evaporator, reduces the temperature of the air to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; meanwhile, the cold air is discharged into the indoor air environment through the forced convection of the indoor air blower;
because of the small evaporator area, the temperature of the refrigerant in the evaporator is small, so that the air temperature of the evaporator passing through 1/2 for dehumidification is lower, and more water in the air is condensed; the unit adopting the rapid dehumidification structure is used for dehumidification according to the actual test effect and about 50% of constant-temperature constant-humidity design data, is used for dehumidification according to 40% of machine room air conditioners, and can achieve the optimal dehumidification effect by adopting a rapid dehumidification mode;
finally, low-temperature and low-pressure refrigerant gas enters from the air suction end of the compressor and returns to the compressor from the lower half part of the refrigerant communicating pipe through the air outlet end of the evaporator along the refrigerant passage A; thus, the air conditioner is circulated continuously to achieve the purposes of indoor refrigeration and rapid dehumidification;
(2) mode 2, i.e. a mode of operation in which the upper half of the evaporator is used for rapid dehumidification: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, the electromagnetic valve A and the electronic expansion valve A are closed, and the electromagnetic valve B and the electronic expansion valve B are opened;
the refrigerant liquid at normal temperature and high pressure flows upwards from the shunt tee joint, passes through the electromagnetic valve B along the refrigerant passage E, reaches the electronic expansion valve B, is throttled and depressurized, and is changed into the refrigerant liquid at low temperature and low pressure; then, the low-temperature low-pressure refrigerant liquid enters the upper evaporator, absorbs the heat in the air in an area of about 1/2 of the evaporator, reduces the temperature of the air to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas;
finally, the low-temperature and low-pressure refrigerant gas flows from the upper half part of the refrigerant communication pipe downwards to the lower half part of the refrigerant communication pipe through the one-way valve and then flows through the air outlet end of the evaporator, enters from the air suction end of the compressor along the refrigerant passage A and returns to the compressor;
the rest is the same as the working mode 1;
(3) mode 3, a mode of operation in which the upper half and the lower half of the evaporator are used simultaneously for total cooling dehumidification: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, and the electromagnetic valve A, the electronic expansion valve A, the electromagnetic valve B and the electronic expansion valve B are opened simultaneously;
the normal-temperature high-pressure refrigerant liquid is divided into 2 parts, and one part of the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee joint, passes through the electromagnetic valve A along the refrigerant passage D and reaches the electronic expansion valve A, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, low-temperature low-pressure refrigerant liquid enters the lower evaporator, and the heat in the air is absorbed in the whole area of the evaporator to reduce the temperature of the air; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas flows to the lower half part of the refrigerant communicating pipe;
the other part of the normal-temperature high-pressure refrigerant liquid flows upwards from the shunt tee joint, passes through the electromagnetic valve B along the refrigerant passage E, reaches the electronic expansion valve B, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, low-temperature low-pressure refrigerant liquid enters the upper evaporator, and the heat in the air is absorbed in the whole area of the evaporator to reduce the temperature of the air; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; then, the low-temperature and low-pressure refrigerant gas flows downwards from the upper half part of the refrigerant communication pipe to the lower half part of the refrigerant communication pipe through the one-way valve, is mixed with the normal-temperature and high-pressure refrigerant liquid flowing to the lower half part of the refrigerant communication pipe from the lower evaporator, passes through the air outlet end of the evaporator, enters from the air suction end of the compressor along the refrigerant passage A and returns to the compressor;
in the working mode 3, the temperature is reduced to the water condensation dew point in the air, and the condensed water is crystallized on the surface of the indoor evaporator to achieve the aim of dehumidification; the evaporator has large area, and is used for dehumidification according to about 20-30% of constant temperature and humidity design data and 5-10% of machine room air conditioner; the dehumidification effect is very limited in the full cooling mode;
the same as the operation mode 1.
The quick dehumidification adopts 2 electromagnetic valves and 2 electronic expansion valves for shunt control, and when the quick dehumidification is operated, the 2 electromagnetic valves and the electronic expansion valves are adopted for shunt control, the lower half part of the evaporator is used, and the upper half part of the evaporator can also be used; when the rapid dehumidification refrigerant operates at the temperature of evaporation lower than 0 ℃ and operates in the mode for a long time, water drops on the panel of the evaporator are easy to frost and freeze; this structure can be with the upper and lower part used in turn of evaporimeter, can prevent the emergence of evaporimeter panel water droplet frosting and the condition of freezing, can satisfy the requirement of quick dehumidification again.
Compared with the prior art, the invention has the beneficial effects that:
the refrigerating and dehumidifying structure of the whole constant-temperature and constant-humidity air conditioning unit is simple in structure, only a shunt tee joint is added to main components related to the refrigerating and dehumidifying structure of the whole constant-temperature and constant-humidity air conditioning unit, an evaporator is divided into an upper evaporator and a lower evaporator 2 through a partition plate, electromagnetic valves and electronic expansion valves are arranged in front of the upper evaporator and the lower evaporator respectively, and the purposes of changing the heat exchange area and reducing the evaporating temperature and quickly dehumidifying are achieved by utilizing dual control of the electromagnetic valves and electronic expansion;
(2) the dehumidification effect is good, and the invention adopts a rapid dehumidification structure, the latent cooling capacity of the constant temperature and humidity air conditioning unit for dehumidification is improved to more than 50 percent from the original 20-30 percent, and the latent cooling capacity of the machine room air conditioner is improved to more than 40 percent from the original 5-9 percent;
the icing and frosting can not be produced, the heat exchange area changing structure can be used for mutually standby and alternate operation of the evaporators at the upper part and the lower part according to the dehumidification condition, the icing and frosting phenomenon caused by too low evaporation temperature can be effectively prevented, and the requirement of quick dehumidification can be met.
Drawings
FIG. 1 is a schematic diagram of: the invention has a schematic structure;
FIG. 2 is a diagram of: enlarged view of part A of FIG. 1;
FIG. 3 is a diagram of: the outdoor heat exchanger structure is enlarged from the front view;
FIG. 4 is a diagram of: in the working mode 1, a flow dividing tee joint, a throttling device and evaporator combined structure and a working principle diagram are provided;
FIG. 5 is a diagram of: in the working mode 2, a flow dividing tee joint, a throttling device and evaporator combined structure and a working principle diagram are provided;
FIG. 6 is a diagram of: in the working mode 3, a flow dividing tee joint, a throttling device and an evaporator combined structure and a working principle diagram are provided.
Description of reference numerals: the air conditioner comprises a compressor 1, a compressor air suction end 101, a compressor air outlet end 102, a susceptors structure 2, an outdoor heat exchanger 201, a copper pipe 20101, an aluminum fin 20102, an outdoor heat dissipation fan 202, a heat exchanger air inlet end 203, a heat exchanger outlet end 204, a throttling device 3, an electronic expansion valve A301, an electronic expansion valve B302, an evaporator 4, an upper evaporator 401, a lower evaporator 402, a partition plate 403, an indoor blower 5, a refrigerant passage 6, a refrigerant passage A601, a refrigerant passage B602, a refrigerant passage C603, a refrigerant passage D604, a refrigerant passage E605, a three-way tap 7, a refrigerant communication pipe 8, a one-way valve 9, a solenoid valve A10, a solenoid valve B11, a stop valve A12, a stop valve B13, a stop valve C14, a stop valve D15, an oil separator 16, a liquid reservoir 17.
Detailed Description
The invention is further described with reference to the following figures and specific examples, which are not intended to be limiting.
As shown in fig. 1 to 6, a constant temperature and humidity air conditioning unit with a rapid dehumidification structure includes a compressor 1, a chiller structure 2, a throttling device 3, an evaporator 4, an indoor blower 5 and a refrigerant passage 6, wherein the indoor blower 5 is arranged above the evaporator 4; the compressor 1, the throttling device 3 and the evaporator 4 form an indoor unit, the refrigerating device structure 2 comprises an outdoor heat exchanger 201 and an outdoor heat dissipation fan 202 arranged outside the outdoor heat exchanger 201, and the outdoor heat exchanger 201 and the outdoor heat dissipation fan 202 form an outdoor unit; the compressor 1 comprises a compressor suction end 101 and a compressor discharge end 102, and the outdoor heat exchanger 201 comprises a heat exchanger inlet end 203 and a heat exchanger outlet end 204; the refrigerant passage 6 comprises a refrigerant passage A601 and a refrigerant passage B602, and is connected from the air outlet end of the evaporator 4 to the air suction end 101 of the compressor through the refrigerant passage A601, and is connected from the air outlet end 102 of the compressor to the air inlet end 203 of the heat exchanger through the refrigerant passage B602;
the evaporator also comprises a flow dividing tee joint 7, wherein the flow dividing tee joint 7 is arranged in front of the throttling device 3 and the evaporator 4; the evaporator 4 comprises an upper evaporator 401 and a lower evaporator 402, a partition 403 is arranged between the upper evaporator 401 and the lower evaporator 402, the upper evaporator 401 and the lower evaporator 402 are arranged in an up-and-down overlapping manner through the partition 403, and the upper evaporator 401 and the lower evaporator 402 are symmetrical up and down with the partition 403 as the center;
the air outlet end of the evaporator 4 is provided with a refrigerant communicating pipe 8, the middle of the refrigerant communicating pipe 8 is provided with a check valve 9, the refrigerant communicating pipe 8 is divided into the upper half part of the refrigerant communicating pipe 8 and the lower half part of the refrigerant communicating pipe 8 by the check valve 9, the upper half part of the refrigerant communicating pipe 8 is communicated with the air outlet end of the upper evaporator 401, and the lower half part of the refrigerant communicating pipe 8 is communicated with the air outlet end of the lower evaporator 402;
the throttling device 3 comprises an electronic expansion valve A301 and an electronic expansion valve B302, wherein the electronic expansion valve A301 is arranged at the inlet end of the upper evaporator 401, and the electronic expansion valve B302 is arranged at the inlet end of the lower evaporator 402;
the refrigerant passage 6 further includes a refrigerant passage C603, a refrigerant passage D604, and a refrigerant passage E605; the refrigerant is connected from the outlet end 204 of the heat exchanger to the three-way flow divider 7 through a refrigerant passage C603, from the three-way flow divider 7 to the electronic expansion valve A301 through a refrigerant passage D604, from the three-way flow divider 7 to the electronic expansion valve B302 through a refrigerant passage E605, and the refrigerant passage D604 and the refrigerant passage E605 are connected in parallel;
a solenoid valve a 10 is provided in a refrigerant passage D604 from the three-way bypass valve 7 to the electronic expansion valve a301, and a solenoid valve B11 is provided in a refrigerant passage E605 from the three-way bypass valve 7 to the electronic expansion valve B302.
The outdoor heat exchanger 201 comprises a copper pipe 20101 and aluminum fins 20102, the outdoor heat exchanger 201 is manufactured by mechanically expanding the copper pipe 20101 and sleeving the aluminum fins 20102 in series, and an inner ring and an outer ring are respectively expanded and then are spliced together to be bent and formed; after the outdoor heat exchanger 201 is manufactured, an air tightness test is performed, the pressure is 4.3Mpa, and the fin pitch is 1.7 mm.
A stop valve A12 and a stop valve B13 are arranged on a refrigerant passage B602 between the compressor air outlet end 102 and the heat exchanger air inlet end 203, wherein the stop valve A12 is indoor, and the stop valve B13 is outdoor; a stop valve C14 and a stop valve D15 are arranged on a refrigerant passage C603 from the outlet end 204 of the heat exchanger to the flow-dividing tee 7, the stop valve C14 is arranged outdoors, and the stop valve D15 is arranged indoors; the stop valve A12 and the stop valve B13 are both FJ16JK-3-NBHK-00, and the stop valve C14 and the stop valve D15 are both FJ13 JK-3-NBHK-00.
The product model of the compressor 1 is ZR144KC-TFP, the product model of the outdoor heat radiation fan 202 is DS760C-190B4.EC, the product model of the shunt tee joint 7 is a 16T-diameter copper tee joint, the product models of the electronic expansion valve A301 and the electronic expansion valve B302 are both DPF (S03)4.0C-01, and the product models of the electromagnetic valve A10 and the electromagnetic valve B11 are both 200RB7T 7.
An oil separator 16 is arranged on the refrigerant passage B602 and between the compressor suction end 101 and the stop valve A12 at the outlet end 204 of the heat exchanger, and the oil separator 16 separates lubricating oil in high-temperature and high-pressure refrigerant gas discharged by the compressor 1 so as to ensure that the device can safely and efficiently operate; the oil separator 16 is an elmer crude oil separator AW 55877.
An accumulator 17 is arranged on the refrigerant passage C603 and between the compressor suction end 101 and the stop valve C14, the accumulator 17 can play a role of buffering a refrigerant and can protect the compressor 1, and the product model of the accumulator 17 is CYQ-4.2.
A drying filter 18 is arranged on the refrigerant passage C603 and between the stop valve D15 and the flow dividing tee 7, the drying filter 18 can filter impurities and has a purifying effect on refrigerant media, and the product model of the drying filter 18 is EK-165S.
A gas-liquid separator 19 is arranged on the refrigerant passage a 601 from the gas outlet end of the evaporator 4 to the compressor suction end 101, the gas-liquid separator 19 is used for processing gas containing a small amount of condensate to realize gas phase purification of low-temperature and low-pressure refrigerant gas flowing from the gas outlet end of the evaporator 4 to the compressor suction end 101, and the product model of the gas-liquid separator 19 is QFQ-5.0.
The working method of the constant temperature and humidity air conditioning unit with the rapid dehumidification structure comprises 3 working modes:
(1) mode 1, i.e. the mode in which the lower half of the evaporator 4 is used for rapid dehumidification: the stop valve A12, the stop valve B13, the stop valve C14 and the stop valve D15 are opened, the electromagnetic valve A10 and the electronic expansion valve A301 are opened, and the electromagnetic valve B11 and the electronic expansion valve B302 are closed;
the compressor 1 is started, the compressor 1 compresses the low-temperature low-pressure refrigerant gas input from the evaporator 4 of the compressor 1 into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is discharged from the compressor gas outlet end 102, and lubricating oil in the high-temperature high-pressure refrigerant gas discharged from the compressor 1 is separated through the oil separator 16 along the refrigerant passage B602; the high-temperature and high-pressure refrigerant gas passes through a stop valve A12 and a stop valve B13, enters the heat exchanger from the air inlet end 203 of the heat exchanger, is changed into normal-temperature and high-pressure refrigerant liquid, and is discharged from the outlet end 204 of the heat exchanger; meanwhile, heat is discharged to the outdoor air environment by the forced convection of the outdoor heat dissipation fan 202;
the refrigerant liquid at normal temperature and high pressure continues to flow forwards along the refrigerant passage B602 and passes through the liquid storage device 17, so that the refrigerant has a buffering function; then, the refrigerant passes through a refrigeration pressure switch which can control and protect pressure, forwards passes through a stop valve C14 and a stop valve D15, flows through a drying filter 18, filters impurities in the refrigerant liquid, and then forwards flows to a shunt tee 7;
the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee 7, passes through the electromagnetic valve A10 along the refrigerant passage D604, reaches the electronic expansion valve A301, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, the low-temperature low-pressure refrigerant liquid enters the lower evaporator 402, absorbs heat in the air in an area of about 1/2 of the evaporator 4, lowers the air temperature to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; meanwhile, the cold air is discharged into the indoor air environment by the forced convection of the indoor air blower 5;
because the evaporator 4 has a small area, the temperature of the refrigerant in the evaporator 4 is low, so that the air passing through the evaporator 4 for dehumidification 1/2 has lower temperature, and more water in the air is condensed; the unit adopting the rapid dehumidification structure is used for dehumidification according to the actual test effect and about 50% of constant-temperature constant-humidity design data, is used for dehumidification according to 40% of machine room air conditioners, and can achieve the optimal dehumidification effect by adopting a rapid dehumidification mode;
finally, the low-temperature and low-pressure refrigerant gas enters from the compressor suction end 101 and returns to the compressor 1 from the lower half part of the refrigerant communicating pipe 8 through the air outlet end of the evaporator 4 along the refrigerant passage a 601; thus, the air conditioner is circulated continuously to achieve the purposes of indoor refrigeration and rapid dehumidification;
(2) mode 2, i.e. the mode of operation in which the upper half of the evaporator 4 is used for rapid dehumidification: the stop valve A12, the stop valve B13, the stop valve C14 and the stop valve D15 are opened, the electromagnetic valve A10 and the electronic expansion valve A301 are closed, and the electromagnetic valve B11 and the electronic expansion valve B302 are opened;
the normal-temperature high-pressure refrigerant liquid flows upwards from the shunt tee 7, passes through the electromagnetic valve B11 along the refrigerant passage E605, reaches the electronic expansion valve B302, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, the low-temperature low-pressure refrigerant liquid enters the upper evaporator 401, absorbs heat in the air in an area of about 1/2 of the evaporator 4, reduces the air temperature to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas;
finally, the low-temperature and low-pressure refrigerant gas flows from the upper half portion of the refrigerant communication pipe 8 downward through the check valve 9 to the lower half portion of the refrigerant communication pipe 8, then flows through the air outlet end of the evaporator 4, enters from the air suction end 101 of the compressor along the refrigerant passage a 601, and returns to the compressor 1;
the rest is the same as the working mode 1;
(3) operation mode 3, an operation mode in which the upper half and the lower half of the evaporator 4 are used simultaneously for total cooling dehumidification: the stop valve A12, the stop valve B13, the stop valve C14 and the stop valve D15 are opened, and the electromagnetic valve A10, the electronic expansion valve A301, the electromagnetic valve B11 and the electronic expansion valve B302 are simultaneously opened;
the normal-temperature high-pressure refrigerant liquid is divided into 2 parts, and one part of the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee 7, passes through the electromagnetic valve A10 along the refrigerant passage D604 and reaches the electronic expansion valve A301, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, the low-temperature low-pressure refrigerant liquid enters the lower evaporator 402, and the heat in the air is absorbed in the whole area of the evaporator 4, so that the air temperature is reduced; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas flows to the lower half part of the refrigerant communicating pipe 8;
the other part of the normal-temperature high-pressure refrigerant liquid flows upwards from the shunt tee 7, passes through the electromagnetic valve B11 along the refrigerant passage E605, reaches the electronic expansion valve B302, is throttled and depressurized, and becomes low-temperature low-pressure refrigerant liquid; then, low-temperature and low-pressure refrigerant liquid enters the upper evaporator 401, and the heat in the air is absorbed in the whole area of the evaporator 4, so that the air temperature is reduced; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; then, the low-temperature and low-pressure refrigerant gas flows downward from the upper half portion of the refrigerant communication pipe 8 through the check valve 9 to the lower half portion of the refrigerant communication pipe 8, is mixed with the normal-temperature and high-pressure refrigerant liquid flowing from the lower evaporator 402 to the lower half portion of the refrigerant communication pipe 8, passes through the gas outlet end of the evaporator 4, enters from the compressor suction end 101 along the refrigerant passage a 601, and returns to the compressor 1;
in the working mode 3, the temperature is reduced to the dew point of water condensation in the air, and condensed water is crystallized on the surface of the indoor evaporator 4 to achieve the aim of dehumidification; the evaporator 4 has large area and is used for dehumidification according to 20-30% of constant temperature and humidity design data and 5-10% of machine room air conditioner; the dehumidification effect is very limited in the full cooling mode;
the same as the operation mode 1.
Because the quick dehumidification is controlled by 2 electromagnetic valves and 2 electronic expansion valves in a shunt way, when the quick dehumidification is operated, the quick dehumidification is controlled by 2 electromagnetic valves and 2 electronic expansion valves in a shunt way, the lower half part of the evaporator 4 is used, and the upper half part of the evaporator 4 can also be used; when the rapid dehumidification refrigerant operates at the temperature of evaporation lower than 0 ℃ and operates in the mode for a long time, water drops on the panel of the evaporator 4 are easy to frost and freeze; this structure can be with the upper and lower part used in turn of evaporimeter 4, can prevent 4 panel water droplets of evaporimeter frosting and the emergence of the condition of freezing, can satisfy the requirement of quick dehumidification again.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A constant temperature and humidity air conditioning unit with a quick dehumidification structure comprises a compressor, a condenser structure, a throttling device, an evaporator, an indoor blower and a refrigerant passage, wherein the indoor blower is arranged above the evaporator; the compressor, the throttling device and the evaporator form an indoor unit, the refrigerating device structure comprises an outdoor heat exchanger and an outdoor heat dissipation fan arranged on the outer side of the outdoor heat exchanger, and the outdoor heat exchanger and the outdoor heat dissipation fan form an outdoor unit; the outdoor heat exchanger comprises a heat exchanger inlet end and a heat exchanger outlet end; the refrigerant passageway includes refrigerant passageway A and refrigerant passageway B, from the end of giving vent to anger of evaporimeter to the compressor suction end, with refrigerant passageway A connection, give vent to anger from the compressor end to the heat exchanger inlet end, with refrigerant passageway B connection, its characterized in that:
the evaporator also comprises a flow-dividing tee joint, and the flow-dividing tee joint is arranged in front of the throttling device and the evaporator; the evaporator comprises an upper evaporator and a lower evaporator, a partition plate is arranged between the upper evaporator and the lower evaporator, the upper evaporator and the lower evaporator are arranged in an up-down overlapping mode through the partition plate, and the upper evaporator and the lower evaporator are symmetrical up and down by taking the partition plate as a center;
the air outlet end of the evaporator is provided with a refrigerant communicating pipe, the middle of the refrigerant communicating pipe is provided with a one-way valve, the refrigerant communicating pipe is divided into an upper half part of the refrigerant communicating pipe and a lower half part of the refrigerant communicating pipe by the one-way valve, the upper half part of the refrigerant communicating pipe is communicated with the air outlet end of the upper evaporator, and the lower half part of the refrigerant communicating pipe is communicated with the air outlet end of the lower evaporator;
the throttling device comprises an electronic expansion valve A and an electronic expansion valve B, wherein the electronic expansion valve A is arranged at the inlet end of the upper evaporator, and the electronic expansion valve B is arranged at the inlet end of the lower evaporator;
the refrigerant passage also comprises a refrigerant passage C, a refrigerant passage D and a refrigerant passage E; connecting the heat exchanger outlet end to a flow-dividing tee joint by a refrigerant passage C, connecting the flow-dividing tee joint to an electronic expansion valve A by a refrigerant passage D, and connecting the flow-dividing tee joint to an electronic expansion valve B by a refrigerant passage E, wherein the refrigerant passage D and the refrigerant passage E are connected in parallel;
an electromagnetic valve A is arranged on a refrigerant passage D from the shunt tee joint to the electronic expansion valve A, and an electromagnetic valve B is arranged on a refrigerant passage E from the shunt tee joint to the electronic expansion valve B.
2. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: the outdoor heat exchanger comprises copper pipes and aluminum fins, the outdoor heat exchanger is manufactured by mechanically expanding and binding the copper pipes and the aluminum fins in a sleeved mode, and the inner ring and the outer ring are respectively expanded and then are spliced together to be bent and molded; the fin pitch was 1.7 mm.
3. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: a stop valve A and a stop valve B are arranged on a refrigerant passage B from the air outlet end of the compressor to the air inlet end of the heat exchanger, the stop valve A is arranged indoors, and the stop valve B is arranged outdoors; and a stop valve C and a stop valve D are arranged on a refrigerant passage C from the outlet end of the heat exchanger to the shunt tee, the stop valve C is arranged outdoors, and the stop valve D is arranged indoors.
4. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: the product model of the shunt tee is a 16T-diameter equal-diameter copper tee.
5. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: and an oil separator is arranged on the refrigerant passage B and between the suction end of the compressor at the outlet end of the heat exchanger and the stop valve A, and the oil separator separates lubricating oil in high-temperature and high-pressure refrigerant gas discharged by the compressor.
6. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: and a liquid storage device is arranged on the refrigerant passage C and between the suction end of the compressor and the stop valve C, and the liquid storage device can play a role in buffering the refrigerant.
7. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: and a drying filter is arranged on the refrigerant passage C and between the stop valve D and the shunt tee joint, and the drying filter can filter impurities and play a role in purifying the refrigerant medium.
8. The constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claim 1, wherein: and a gas-liquid separator is arranged on the refrigerant passage A and between the air outlet end of the evaporator and the air suction end of the compressor, the gas-liquid separator is used for treating gas containing a small amount of condensate to realize gas-phase purification of low-temperature and low-pressure refrigerant gas flowing from the air outlet end of the evaporator to the air suction end of the compressor, and the product model of the gas-liquid separator is QFQ-5.0.
9. The operating method of the constant temperature and humidity air conditioning unit with the rapid dehumidification structure as claimed in claims 1 to 8, wherein: the working method of the constant temperature and humidity air conditioning unit with the rapid dehumidification structure comprises 3 working modes:
(1) mode 1, i.e. the mode of operation for rapid dehumidification using the lower half of the evaporator: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, the electromagnetic valve A and the electronic expansion valve A are opened, and the electromagnetic valve B and the electronic expansion valve B are closed;
the compressor is started, the compressor compresses low-temperature low-pressure refrigerant gas input from the evaporator of the compressor into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is discharged from the air outlet end of the compressor, and lubricating oil in the high-temperature high-pressure refrigerant gas discharged by the compressor is separated through the oil separator along the refrigerant passage B; the high-temperature and high-pressure refrigerant gas passes through the stop valve A and the stop valve B, enters the heat exchanger from the air inlet end of the heat exchanger, is changed into normal-temperature and high-pressure refrigerant liquid, and is discharged from the outlet end of the heat exchanger; meanwhile, heat is discharged to the outdoor air environment through the forced convection of the outdoor heat dissipation fan;
the refrigerant liquid at normal temperature and high pressure continuously flows forwards along the refrigerant passage B and passes through the liquid storage device, so that the refrigerant has a buffering effect; then, the refrigerant passes through a refrigeration pressure switch which can control and protect pressure, passes through a stop valve C and a stop valve D forwards, flows through a drying filter, filters impurities in the refrigerant liquid, and then flows forwards to reach a shunt tee;
the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee joint, passes through the electromagnetic valve A along the refrigerant passage D, reaches the electronic expansion valve A, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, the low-temperature low-pressure refrigerant liquid enters the lower evaporator, absorbs the heat in the air in an area of about 1/2 of the evaporator, reduces the temperature of the air to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; meanwhile, the cold air is discharged into the indoor air environment through the forced convection of the indoor air blower;
because of the small evaporator area, the temperature of the refrigerant in the evaporator is small, so that the air temperature of the evaporator passing through 1/2 for dehumidification is lower, and more water in the air is condensed; the unit adopting the rapid dehumidification structure is used for dehumidification according to the actual test effect and about 50% of constant-temperature constant-humidity design data, is used for dehumidification according to 40% of machine room air conditioners, and can achieve the optimal dehumidification effect by adopting a rapid dehumidification mode;
finally, low-temperature and low-pressure refrigerant gas enters from the air suction end of the compressor and returns to the compressor from the lower half part of the refrigerant communicating pipe through the air outlet end of the evaporator along the refrigerant passage A; thus, the air conditioner is circulated continuously to achieve the purposes of indoor refrigeration and rapid dehumidification;
(2) mode 2, i.e. a mode of operation in which the upper half of the evaporator is used for rapid dehumidification: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, the electromagnetic valve A and the electronic expansion valve A are closed, and the electromagnetic valve B and the electronic expansion valve B are opened;
the refrigerant liquid at normal temperature and high pressure flows upwards from the shunt tee joint, passes through the electromagnetic valve B along the refrigerant passage E, reaches the electronic expansion valve B, is throttled and depressurized, and is changed into the refrigerant liquid at low temperature and low pressure; then, the low-temperature low-pressure refrigerant liquid enters the upper evaporator, absorbs the heat in the air in an area of about 1/2 of the evaporator, reduces the temperature of the air to be lower and close to 0 ℃, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas;
finally, the low-temperature and low-pressure refrigerant gas flows from the upper half part of the refrigerant communication pipe downwards to the lower half part of the refrigerant communication pipe through the one-way valve and then flows through the air outlet end of the evaporator, enters from the air suction end of the compressor along the refrigerant passage A and returns to the compressor;
the rest is the same as the working mode 1;
(3) mode 3, a mode of operation in which the upper half and the lower half of the evaporator are used simultaneously for total cooling dehumidification: the stop valve A, the stop valve B, the stop valve C and the stop valve D are opened, and the electromagnetic valve A, the electronic expansion valve A, the electromagnetic valve B and the electronic expansion valve B are opened simultaneously;
the normal-temperature high-pressure refrigerant liquid is divided into 2 parts, and one part of the normal-temperature high-pressure refrigerant liquid flows downwards from the shunt tee joint, passes through the electromagnetic valve A along the refrigerant passage D and reaches the electronic expansion valve A, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, low-temperature low-pressure refrigerant liquid enters the lower evaporator, and the heat in the air is absorbed in the whole area of the evaporator to reduce the temperature of the air; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas flows to the lower half part of the refrigerant communicating pipe;
the other part of the normal-temperature high-pressure refrigerant liquid flows upwards from the shunt tee joint, passes through the electromagnetic valve B along the refrigerant passage E, reaches the electronic expansion valve B, is throttled and depressurized, and is changed into low-temperature low-pressure refrigerant liquid; then, low-temperature low-pressure refrigerant liquid enters the upper evaporator, and the heat in the air is absorbed in the whole area of the evaporator to reduce the temperature of the air; the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant gas; then, the low-temperature and low-pressure refrigerant gas flows downwards from the upper half part of the refrigerant communication pipe to the lower half part of the refrigerant communication pipe through the one-way valve, is mixed with the normal-temperature and high-pressure refrigerant liquid flowing to the lower half part of the refrigerant communication pipe from the lower evaporator, passes through the air outlet end of the evaporator, enters from the air suction end of the compressor along the refrigerant passage A and returns to the compressor;
in the working mode 3, the temperature is reduced to the water condensation dew point in the air, and the condensed water is crystallized on the surface of the indoor evaporator to achieve the aim of dehumidification; the evaporator has large area, and is used for dehumidification according to about 20-30% of constant temperature and humidity design data and 5-10% of machine room air conditioner; the dehumidification effect is very limited in the full cooling mode;
the same as the operation mode 1.
10. The operating method of a constant temperature and humidity air conditioning unit with a rapid dehumidification structure as claimed in claim 9, wherein: the quick dehumidification adopts 2 electromagnetic valves and 2 electronic expansion valves for shunt control, and when the quick dehumidification is operated, the 2 electromagnetic valves and the electronic expansion valves are adopted for shunt control, the lower half part of the evaporator is used, and the upper half part of the evaporator can also be used; when the rapid dehumidification refrigerant operates at the temperature of evaporation lower than 0 ℃ and operates in the mode for a long time, water drops on the panel of the evaporator are easy to frost and freeze; this structure can be with the upper and lower part used in turn of evaporimeter, can prevent the emergence of evaporimeter panel water droplet frosting and the condition of freezing, can satisfy the requirement of quick dehumidification again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161421.1A CN110779081A (en) | 2019-11-24 | 2019-11-24 | Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161421.1A CN110779081A (en) | 2019-11-24 | 2019-11-24 | Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110779081A true CN110779081A (en) | 2020-02-11 |
Family
ID=69392344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911161421.1A Pending CN110779081A (en) | 2019-11-24 | 2019-11-24 | Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110779081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483451A (en) * | 2021-07-12 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and module for air conditioner operation, air conditioner and computer storage medium |
| CN114893934A (en) * | 2022-05-24 | 2022-08-12 | 珠海格力电器股份有限公司 | Constant-temperature dehumidification evaporator, air conditioner and control method of constant-temperature dehumidification evaporator |
-
2019
- 2019-11-24 CN CN201911161421.1A patent/CN110779081A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483451A (en) * | 2021-07-12 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and module for air conditioner operation, air conditioner and computer storage medium |
| CN114893934A (en) * | 2022-05-24 | 2022-08-12 | 珠海格力电器股份有限公司 | Constant-temperature dehumidification evaporator, air conditioner and control method of constant-temperature dehumidification evaporator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103062851B (en) | Air-conditioning system and dehumanization method thereof | |
| EP2543941B1 (en) | Chiller | |
| CN210980080U (en) | Constant temperature and humidity air conditioning unit | |
| WO2019091241A1 (en) | Cooling circulation system for air conditioning, and air conditioner | |
| CN113446754B (en) | Double-cold-source air source heat pump unit with total heat recovery | |
| CN101957061A (en) | Quasi-two-stage compression ultralow temperature air source heat pump water heater with economizer | |
| CN103471296B (en) | Operation of air conditioning systems | |
| CN107238226B (en) | Multi-split system and control method thereof | |
| CN112161324B (en) | Air conditioner | |
| WO2019091240A1 (en) | Heating circulation system for air conditioning, and air conditioner | |
| CN111059802A (en) | Condensing equipment and air conditioning system who has it | |
| CN106440137A (en) | Energy saving air conditioner system and refrigeration method | |
| CN110779081A (en) | Constant-temperature constant-humidity air conditioning unit with rapid dehumidification structure and working method thereof | |
| CN109442788A (en) | The defrosting method and air-conditioning of air-conditioning | |
| CN109539620B (en) | Air conditioning system | |
| CN216953700U (en) | Refrigerator refrigerating system with humidity adjusting function and refrigerator | |
| US20230056774A1 (en) | Sub-cooling a refrigerant in an air conditioning system | |
| CN114034183A (en) | Totally-enclosed high-precision temperature and humidity independent control heat pump drying system | |
| CN213687346U (en) | Evaporation cold and hot pump unit | |
| CN115143658A (en) | Double-working-condition water chilling unit and control method thereof | |
| CN213089945U (en) | Air conditioner | |
| CN1337552A (en) | Ice preventer for wind cooled heat pump air conditioner | |
| CN107631515A (en) | Heat pump air conditioner unit | |
| CN211290281U (en) | Air conditioning system | |
| CN210463633U (en) | Special air conditioner using heat pipe heat exchanger as indoor heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |