CN109186008B - Household water source double-plate heat recovery fresh air handling unit - Google Patents
Household water source double-plate heat recovery fresh air handling unit Download PDFInfo
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- CN109186008B CN109186008B CN201811223175.3A CN201811223175A CN109186008B CN 109186008 B CN109186008 B CN 109186008B CN 201811223175 A CN201811223175 A CN 201811223175A CN 109186008 B CN109186008 B CN 109186008B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000011084 recovery Methods 0.000 title claims abstract description 47
- 238000005192 partition Methods 0.000 claims description 34
- 239000012943 hotmelt Substances 0.000 claims description 15
- 238000007791 dehumidification Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- 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
- F24F3/12—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 treatment of the air otherwise than by heating and cooling
- F24F3/14—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 treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/147—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 treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
-
- 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
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- 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]
- Y02B30/56—Heat recovery units
Abstract
The invention relates to a household water source double-plate heat recovery fresh air unit which comprises a dehumidifying unit and a heat recovery unit, wherein the dehumidifying unit comprises a first shell, a first air port and a second air port are formed in the top wall of the first shell, a gas-water heat exchanger is arranged in the first shell, and two ends of the gas-water heat exchanger are correspondingly connected with a first stop valve and a second stop valve; the heat recovery unit comprises a second shell, a third air opening and a fourth air opening are formed in the bottom wall of the second shell, a return air opening, an air supply opening, a new air opening and an air outlet are formed in the top wall of the second shell, a first plate heat exchanger and a second plate heat exchanger which are distributed left and right are arranged in the second shell, and the first plate heat exchanger and the second plate heat exchanger are obliquely arranged. The energy-saving device has the advantages of simple structure, convenience in disassembly and assembly, reliable performance and remarkable energy conservation, and the overall energy efficiency ratio of the unit is effectively improved through recycling the energy of the return air at different stages.
Description
Technical Field
The invention relates to air conditioning equipment, in particular to a household double-plate heat recovery fresh air unit adopting a water source.
Background
With the development of economy and society, the requirements of people on living environments are higher and higher, so that the rapid development of building energy conservation and air conditioning equipment is promoted, and various types of fresh air units are generated. The traditional fresh air unit mainly adopts a heat pump mode, in summer, a refrigerating working medium releases heat at a condenser on one hand and discharges the heat through water cooling or air cooling, and on the other hand absorbs the heat at an evaporator to reduce the fresh air temperature so as to achieve the purpose of refrigerating and dehumidifying, and the reheater arranged at the rear side of the evaporator is used for reheating the fresh air so as to prevent the influence of the low fresh air temperature on the indoor air quality. In winter, the four-way reversing valve is used for converting the flow direction of the refrigerating working medium to make the heat exchange process opposite to summer, thereby achieving the purpose of heating. The traditional fresh air handling unit mainly has the following problems in practical application: the energy of the return air cannot be effectively utilized, so that the energy consumption of the unit is higher, and the overall energy efficiency is lower; the function is single, and environmental suitability is poor, has influenced the utilization ratio of unit. To solve the problems of the conventional fresh air handling unit, a person skilled in the art has developed an integrated fresh air handling unit with a heat recovery function, such as the one disclosed in the patent application with publication number CN106839354a, which performs recycling of return air heat by arranging two side-by-side plate heat exchangers in the unit. Although the integrated fresh air handling unit can realize a certain heat recovery function, the integrated fresh air handling unit is complex in structure and large in volume, and the difficulty of a preparation process is increased; especially, the air duct is limited by space and is difficult to design, more large-angle steering is often present, the wind resistance is increased, the balance of fresh air and return air is influenced, and the heat recovery efficiency and the energy-saving effect are not ideal. Meanwhile, the dehumidification systems of the existing fresh air unit are all copper tube fin type heat exchangers, the heat exchangers are poor in corrosion resistance and easy to corrode, and once damaged, the heat exchangers can only be completely removed and replaced, so that great waste is caused; the fin spacing of the heat exchanger is smaller, the dirty blocking phenomenon is easy to occur, the air flow is blocked, the heat exchange efficiency is affected, the energy consumption of a unit is increased, and the air is polluted due to bacteria and mildew.
Disclosure of Invention
The invention aims to provide a household water source double-plate heat recovery fresh air unit which has the advantages of simple structure, convenience in disassembly and assembly, reliable performance and remarkable energy conservation, and the overall energy efficiency ratio of the unit is effectively improved through recycling the return air energy at different stages.
In order to solve the problems in the prior art, the invention provides a household water source double-plate heat recovery fresh air unit which comprises a dehumidification unit and a heat recovery unit, wherein the dehumidification unit comprises a first shell, a left half part and a right half part of the top wall of the first shell are correspondingly provided with a first air port and a second air port, a gas-water heat exchanger is arranged in the first shell, and two ports of the gas-water heat exchanger are correspondingly connected with a first stop valve and a second stop valve which are arranged on the side wall of the first shell; the heat recovery unit comprises a second shell fixed on the upper side of the first shell, a third air port and a fourth air port corresponding to the first air port and the second air port are arranged on the bottom wall of the second shell, a return air port, an air supply port, a new air port and an air outlet are sequentially arranged on the top wall of the second shell from left to right, a first plate heat exchanger and a second plate heat exchanger which are distributed left to right are arranged in the second shell, and the first plate heat exchanger and the second plate heat exchanger are obliquely arranged; the passageway that communicates fresh air inlet, the primary side of second plate heat exchanger, fourth wind gap, second wind gap, the inner chamber of first casing, first wind gap, third wind gap, the primary side of first plate heat exchanger and supply-air outlet is equipped with the fresh air wind channel, and the passageway that communicates return air inlet, the secondary side of first plate heat exchanger, the secondary side of second plate heat exchanger and air exit is equipped with the wind channel of airing exhaust.
Furthermore, the invention relates to a household water source double-plate heat recovery fresh air unit, wherein the inclination angle of the first plate heat exchanger and the second plate heat exchanger is 30-60 degrees, and the first plate heat exchanger and the second plate heat exchanger are symmetrically distributed.
Furthermore, the invention relates to a household water source double-plate heat recovery fresh air unit, wherein the inclination angle of the first plate heat exchanger and the second plate heat exchanger is 45 degrees.
Furthermore, the invention relates to a household water source double-plate heat recovery fresh air handling unit, wherein the air-water heat exchanger is a plastic heat exchanger.
Furthermore, the invention relates to a household water source double-plate heat recovery fresh air handling unit, wherein the air-water heat exchanger is composed of a plurality of heat exchange modules made of plastic materials, each heat exchange module comprises a left main pipe and a right main pipe which are distributed at intervals and are vertically arranged, the left main pipe and the right main pipe are communicated through a plurality of heat exchange pipes, the upper ends and the lower ends of the left main pipe and the right main pipe are respectively provided with a first interface, and the front side wall and the rear side wall of the left main pipe and the right main pipe are respectively provided with a second interface which is symmetrically distributed; adjacent heat exchange modules are connected with each other through first interfaces or second interfaces thereof in a hot-melt mode, one of the second interfaces of one heat exchange module is connected with a first connector through hot-melt, one of the second interfaces of the other heat exchange module is connected with a second connector through hot-melt, the first interfaces of all heat exchange modules are respectively connected with a first plugging plate through hot-melt, and the second interfaces of all heat exchange modules are respectively connected with a second plugging plate through hot-melt.
Furthermore, the household water source double-plate heat recovery fresh air handling unit disclosed by the invention has the advantages that the left main pipe and the right main pipe adopt square pipe structures; the heat exchange tubes are provided with multiple layers along the front-back direction, each layer comprises multiple heat exchange tubes uniformly distributed along the up-down direction, and the heat exchange tubes of adjacent layers are distributed in a staggered manner along the up-down direction.
Furthermore, the invention discloses a household water source double-plate heat recovery fresh air handling unit, wherein the first air port and the second air port are of step hole structures with large upper part and small lower part, annular platforms corresponding to the first air port and the second air port are respectively arranged on the periphery of the third air port and the fourth air port on the bottom wall of the second shell, sealing sleeves are sleeved on the annular platforms, the bottoms of the sealing sleeves are positioned between the annular platforms and the top wall of the first shell, and the upper ends of the sealing sleeves are positioned in annular grooves formed in the periphery of the annular platforms on the bottom wall of the second shell.
Furthermore, the invention discloses a household water source double-plate heat recovery fresh air unit, wherein the lower sides of a first plate heat exchanger and a second plate heat exchanger are respectively connected with the bottom wall of a second shell in a sealing way, a first partition plate is arranged between the left side wall of the first plate heat exchanger and the left side wall of the second shell, a second partition plate is arranged between the right side wall of the second shell and the first plate heat exchanger, a third partition plate and a fourth partition plate are correspondingly arranged between the top walls of the first plate heat exchanger, the second plate heat exchanger and the second shell, a fifth partition plate is arranged between the first plate heat exchanger and the second plate heat exchanger, and a sixth partition plate is arranged between the fifth partition plate and the top wall of the second shell.
Furthermore, the invention relates to a household water source double-plate heat recovery fresh air unit, wherein the fresh air port is provided with a first electric air valve, the air outlet is provided with a second electric air valve, and the second partition plate is provided with a third electric air valve.
Further, the invention relates to a household water source double-plate heat recovery fresh air unit, wherein a fresh air filter and a fresh air draught fan are arranged between the fourth partition plate and the sixth partition plate from top to bottom; a return air filter and a return air induced draft fan are arranged between the third partition plate and the left side wall of the second shell from top to bottom; the first shell is internally provided with a blower, a demister and a water collecting tank, wherein the blower is positioned at the lower side of the first air port, the demister is positioned between the air-water heat exchanger and the blower, and the water collecting tank is positioned at the lower side of the air-water heat exchanger.
Compared with the prior art, the household water source double-plate heat recovery fresh air handling unit has the following advantages: the invention is characterized in that a dehumidification unit and a heat recovery unit are arranged, the dehumidification unit is provided with a first shell, a left half part and a right half part of the top wall of the first shell are correspondingly provided with a first air port and a second air port, a gas-water heat exchanger is arranged in the first shell, and two ports of the gas-water heat exchanger are correspondingly connected with a first stop valve and a second stop valve which are arranged on the side wall of the first shell; the heat recovery unit is provided with a second shell fixed on the upper side of the first shell, a third air port and a fourth air port corresponding to the first air port and the second air port are arranged on the bottom wall of the second shell, a return air port, an air supply port, a new air port and an air outlet are sequentially arranged on the top wall of the second shell from left to right, a first plate heat exchanger and a second plate heat exchanger which are distributed left to right are arranged in the second shell, and the first plate heat exchanger and the second plate heat exchanger are obliquely arranged; meanwhile, a fresh air channel is arranged on a passage which is communicated with the fresh air inlet, the primary side of the second plate heat exchanger, the fourth air inlet, the second air inlet, the inner cavity of the first shell, the first air inlet, the third air inlet, the primary side of the first plate heat exchanger and the air supply outlet, and an air exhaust channel is arranged on a passage which is communicated with the return air inlet, the secondary side of the first plate heat exchanger, the secondary side of the second plate heat exchanger and the air exhaust outlet. Therefore, the household water source double-plate heat recovery fresh air handling unit with simple structure, convenient disassembly and assembly, reliable performance and remarkable energy conservation is formed. In practical application, the air-water heat exchanger is connected with a cold/hot water source through the first stop valve and the second stop valve and forms a circulation, so that fresh air can be treated. According to the invention, the dehumidifying unit and the heat recovery unit are in a split design and combined structure, so that on one hand, the structure and the manufacturing process are simplified, the assembly of each part and the overall installation difficulty are reduced, the post maintenance is facilitated, and on the other hand, the inner cavity of the first shell is used as a component part of the fresh air duct, and the air duct has good flatness, so that the wind resistance is reduced, and the energy consumption is reduced. Meanwhile, the first plate heat exchanger and the second plate heat exchanger which are distributed left and right are arranged in the second shell, so that full recycling of return air energy can be realized under the conditions of refrigeration, dehumidification and heating, and the overall energy efficiency ratio of the unit is effectively improved. The refrigerating and dehumidifying process is as follows: fresh air enters the unit from the fresh air port, sequentially flows through the primary side of the second plate heat exchanger, the fourth air port, the second air port, the inner cavity of the first shell, the first air port, the third air port, the primary side of the first plate heat exchanger and the air supply port and then is fed into the room; return air enters the unit from the return air inlet and sequentially flows through the secondary side of the first plate heat exchanger, the secondary side of the second plate heat exchanger and the air outlet to be discharged out of the room. In the process, the fresh air and the return air are subjected to heat exchange in the first plate heat exchanger and the second plate heat exchanger respectively. In the second plate heat exchanger, the return air is discharged outdoors through the air outlet after absorbing heat in the fresh air, so that the precooling treatment of the fresh air is realized, and the energy consumption of the dehumidifying unit can be reduced. The pre-cooled fresh air enters a dehumidification unit, is deeply dehumidified by a gas-water heat exchanger and becomes cold air dried at low temperature, and then enters a first plate heat exchanger. In the first plate heat exchanger, the fresh air and the return air exchange sensible heat, and the fresh air absorbs the heat of the return air and becomes dry air with proper temperature and then is sent into a room through an air supply outlet; the temperature of the return air releasing heat is reduced, and the precooling treatment effect of the fresh air in the second plate heat exchanger is enhanced. The heating process is as follows: fresh air enters the unit from the fresh air port, sequentially flows through the primary side of the second plate heat exchanger, the fourth air port, the second air port, the inner cavity of the first shell, the first air port, the third air port, the primary side of the first plate heat exchanger and the air supply port and then is fed into the room; return air enters the unit from the return air inlet and sequentially flows through the secondary side of the first plate heat exchanger, the secondary side of the second plate heat exchanger and the air outlet to be discharged out of the room. In the second plate heat exchanger, the return air is discharged outdoors after preheating the low-temperature fresh air, so that the energy consumption of the dehumidification unit is reduced. The preheated fresh air enters the first plate heat exchanger after being further heated by the air-water heat exchanger. In the first plate heat exchanger, the temperature of the fresh air and the temperature of the return air are basically the same through control, so that the fresh air and the return air do not perform heat efficiency exchange, and then the fresh air is sent into a room through an air port. According to the invention, the first plate heat exchanger and the second plate heat exchanger are obliquely arranged, and the air return opening, the air supply opening, the air fresh opening and the air exhaust opening are correspondingly arranged on the top wall of the second shell, so that the large-angle steering of the fresh air duct and the air return duct can be avoided under the condition of relatively small volume, the wind resistance can be effectively reduced, the fresh air and the air return are kept relatively balanced, the heat exchange efficiency of the fresh air and the air return is enhanced, the control difficulty is reduced, the fresh air entering a room can meet the temperature requirement without any additional heating device, and the energy-saving effect is remarkable.
The invention relates to a household water source double-plate heat recovery fresh air handling unit, which is further described in detail below with reference to the specific embodiments shown in the accompanying drawings:
drawings
FIG. 1 is a schematic diagram of a household water source double-plate heat recovery fresh air handling unit;
FIG. 2 is a front view of a heat exchange module in a household water source double-plate heat recovery fresh air handling unit according to the present invention;
FIG. 3 is a top view of a heat exchange module in a household water source double-plate heat recovery fresh air handling unit according to the present invention;
FIG. 4 is a perspective view of a heat exchange module in a household water source double-plate heat recovery fresh air handling unit according to the present invention;
FIG. 5 is an enlarged schematic view of a portion of the position A of FIG. 4;
FIG. 6 is a partially enlarged schematic illustration of position B in FIG. 4;
FIG. 7 is a schematic diagram of a first air-water heat exchanger in a household water source double-plate heat recovery fresh air handling unit according to the present invention;
fig. 8 is a schematic diagram of a second air-water heat exchanger in a household water source double-plate heat recovery fresh air handling unit according to the present invention.
Detailed Description
It should be noted that the terms of up, down, front, back, left, right and the like in the present invention are merely described according to the drawings, so as to facilitate understanding, and are not limited to the technical solution of the present invention and the scope of protection claimed.
The embodiment of the household water source double-plate heat recovery fresh air handling unit disclosed by the invention as shown in fig. 1 to 8 comprises a dehumidifying unit and a heat recovery unit. The dehumidifying unit comprises a first shell 1, a first air port 11 and a second air port 12 are correspondingly arranged on the left half part and the right half part of the top wall of the first shell 1, a gas-water heat exchanger 13 is arranged in the first shell 1, and two ports of the gas-water heat exchanger 13 are correspondingly connected with a first stop valve 14 and a second stop valve 15 which are arranged on the side wall of the first shell 1. The heat recovery unit comprises a second shell 2 fixed on the upper side of the first shell 1, a third air port 21 and a fourth air port 22 corresponding to the first air port 11 and the second air port 12 are arranged on the bottom wall of the second shell 2, an air return port 23, an air supply port 24, a fresh air port 25 and an air outlet 26 are sequentially arranged on the top wall of the second shell 2 from left to right, a first plate heat exchanger 27 and a second plate heat exchanger 28 which are distributed left to right are arranged in the second shell 2, and the first plate heat exchanger 27 and the second plate heat exchanger 28 are obliquely arranged. Meanwhile, a fresh air duct is arranged on a passage which is communicated with the fresh air port 25, the primary side of the second plate heat exchanger 28, the fourth air port 22, the second air port 12, the inner cavity of the first shell 1, the first air port 11, the third air port 21, the primary side of the first plate heat exchanger 27 and the air supply port 24, and an air exhaust duct is arranged on a passage which is communicated with the return air port 23, the secondary side of the first plate heat exchanger 27, the secondary side of the second plate heat exchanger 28 and the air exhaust port 26.
The household water source double-plate heat recovery fresh air handling unit with simple structure, convenient disassembly and assembly, reliable performance and obvious energy conservation is formed through the structure. In practical application, the air-water heat exchanger 13 is connected with a cold/hot water source through the first stop valve 14 and the second stop valve 15 to form a circulation, so that fresh air can be treated. According to the invention, the dehumidifying unit and the heat recovery unit are in a split design and combined structure, so that on one hand, the structure and the manufacturing process are simplified, the assembly of each part and the overall installation difficulty are reduced, the post maintenance is facilitated, and on the other hand, the inner cavity of the first shell 1 is used as a component part of the fresh air duct, and the air duct has good flatness, so that the wind resistance is reduced, and the energy consumption is reduced. Meanwhile, the first plate heat exchanger 27 and the second plate heat exchanger 28 which are distributed left and right are arranged in the second shell 2, so that full recycling of return air energy can be realized under the conditions of refrigeration, dehumidification and heating, and the overall energy efficiency ratio of the unit is effectively improved. The refrigerating and dehumidifying process is as follows: fresh air enters the unit from the fresh air port 25, sequentially flows through the primary side of the second plate heat exchanger 28, the fourth air port 22, the second air port 12, the inner cavity of the first shell 1, the first air port 11, the third air port 21, the primary side of the first plate heat exchanger 27 and the air supply port 24, and then is fed into a room; return air enters the unit from the return air inlet 23 and sequentially flows through the secondary side of the first plate heat exchanger 27, the secondary side of the second plate heat exchanger 28 and the air outlet 26 to be discharged out of the room. In the process, the fresh air and the return air are subjected to heat exchange in the first plate heat exchanger 27 and the second plate heat exchanger 28, respectively. In the second plate heat exchanger 28, the return air absorbs heat in the fresh air and is discharged outdoors through the air outlet 26, so that the precooling treatment of the fresh air is realized, and the energy consumption of the dehumidifying unit can be reduced. The pre-cooled fresh air enters the dehumidification unit and deeply dehumidifies through the air-water heat exchanger 13 to become low-temperature dry cold air, and then enters the first plate heat exchanger 27. In the first plate heat exchanger 27, the fresh air performs sensible heat exchange with the return air, and the fresh air absorbs the heat of the return air and becomes dry air with proper temperature and then is sent into a room through the air supply opening 24; the return air releases heat at a reduced temperature, enhancing the pre-cooling effect of the fresh air in the second plate heat exchanger 28. The heating process is as follows: fresh air enters the unit from the fresh air port 25, sequentially flows through the primary side of the second plate heat exchanger 28, the fourth air port 22, the second air port 12, the inner cavity of the first shell 1, the first air port 11, the third air port 21, the primary side of the first plate heat exchanger 27 and the air supply port 24, and then is fed into a room; return air enters the unit from the return air inlet 23 and sequentially flows through the secondary side of the first plate heat exchanger 27, the secondary side of the second plate heat exchanger 28 and the air outlet 26 to be discharged out of the room. In the second plate heat exchanger 28, the return air is discharged outdoors after preheating the low-temperature fresh air, so that the energy consumption of the dehumidification unit is reduced. The preheated fresh air is further heated by the air-water heat exchanger 13 and then enters the first plate heat exchanger 27. In the first plate heat exchanger 27, the temperature of the fresh air and the temperature of the return air are controlled to be substantially the same so that the fresh air and the return air do not undergo heat efficiency exchange, and then the fresh air is sent into a room through the air port. According to the invention, the first plate heat exchanger 27 and the second plate heat exchanger 28 are obliquely arranged, and the air return opening 23, the air supply opening 24, the fresh air opening 25 and the air outlet 26 are correspondingly arranged on the top wall of the second shell 2, so that the large-angle steering of the fresh air duct and the air return duct can be avoided under the condition of relatively small volume, the wind resistance can be effectively reduced, the fresh air and the air return are kept relatively balanced, the heat exchange efficiency of the fresh air and the air return is enhanced, the control difficulty is reduced, the fresh air entering the room can meet the temperature requirement without any additional heating device, and the energy saving effect is remarkable. It should be noted that, the connection and fixation of the second housing 2 and the first housing 1 may be performed by adopting a plurality of modes such as a hinge and a bolt, and both may be assembled and fixed in advance in a production workshop, or may be assembled and fixed on site in an installation site, and should be flexibly selected according to the use occasion and the installation space.
As an optimization scheme, in this embodiment, the inclination angles of the first plate heat exchanger 27 and the second plate heat exchanger 28 are generally designed to be 30-60 degrees, and the first plate heat exchanger and the second plate heat exchanger are symmetrically distributed left and right, so that wind resistance can be reduced, and fresh air and return air can be kept relatively balanced. Preferably, the inclination angle of the first plate heat exchanger 27 and the second plate heat exchanger 28 is designed to be 45 degrees, so that the wind resistance and the area allocation of fresh air and return air can be optimized. Meanwhile, in the specific embodiment, the plastic heat exchanger is adopted by the air-water heat exchanger 13, so that the corrosion resistance is enhanced, the service life is prolonged, the air is not polluted by bacteria and mildew, and the air-water heat exchanger is particularly suitable for places with high requirements on air quality (such as hospitals, medical plants and the like).
As an optimization scheme, the air-water heat exchanger 13 is formed by combining a plurality of heat exchange modules made of plastic materials. The heat exchange module comprises a left main pipe 131 and a right main pipe 132 which are distributed at intervals and are vertically arranged, and the left main pipe 131 and the right main pipe 132 are communicated through a plurality of heat exchange pipes 133. Meanwhile, first interfaces 134 are respectively provided at the upper and lower ends of the left and right main pipes 131 and 132, and symmetrically distributed second interfaces 135 are respectively provided on the front and rear sidewalls of the left and right main pipes 131 and 132. When the combination constitutes the gas-water heat exchanger, the adjacent heat exchange modules are connected with each other through the first interfaces 134 or the second interfaces 135 thereof in a hot-melt manner, one of the second interfaces 135 of one heat exchange module is connected with the first connector 136 through the hot-melt manner, one of the second interfaces 135 of the other heat exchange module is connected with the second connector 137 through the hot-melt manner, the first interfaces 134 of all the heat exchange modules are respectively plugged through the first plugging plates 138 installed through the hot-melt manner, and the second interfaces 135 of all the heat exchange modules are respectively plugged through the second plugging plates 139 connected through the hot-melt manner. The air-water heat exchanger 13 and the heat exchange module thereof have the advantages of simple structure, flexible assembly and good expansibility, can be combined to form different air-water heat exchangers according to specific installed capacity and use requirements, have higher safety and maintainability, and can still normally work without integrally replacing the air-water heat exchanger by only sealing the broken heat exchange tube through hot melting when the broken heat exchange tube 133 is broken or broken. In addition, in practical application, the present invention generally uses square tube structure for the left main tube 131 and the right main tube 132, so as to reduce water resistance. And the heat exchange tubes 133 are arranged in a plurality of layers along the front-back direction, each layer is provided with a plurality of heat exchange tubes 133 which are uniformly distributed along the up-down direction, and the heat exchange tubes 133 of the adjacent layers are distributed in a staggered manner along the up-down direction. The gas-water heat exchanger with the structure can enhance the convection heat exchange and improve the heat exchange efficiency.
As an optimization scheme, in this embodiment, the first air port 11 and the second air port 12 both adopt a stepped hole structure with large upper part and small lower part, and the bottom wall of the second casing 2 is provided with annular platforms corresponding to the first air port 11 and the second air port 12 at the periphery of the third air port 21 and the fourth air port 22 respectively, and the annular platforms are sleeved with sealing sleeves 3, so that the bottoms of the sealing sleeves 3 are located between the annular platforms and the top wall of the first casing 1, and the upper ends of the sealing sleeves 3 are located in annular grooves formed in the periphery of the annular platforms by the bottom wall of the second casing 2. This structure sets up the convenience that can improve group quick-witted dismouting, and can realize accurate positioning through the ring platform, has reduced the assembly operation degree of difficulty, and can guarantee the reliability of wind channel connection between second casing 2 and the first casing 1 through seal cover 3, and has stable in structure, advantage that the leakproofness is good.
As a specific embodiment, the lower sides of the first plate heat exchanger 27 and the second plate heat exchanger 28 are respectively connected with the bottom wall of the second shell 2 in a sealing way, a first partition plate is arranged between the first plate heat exchanger 27 and the left side wall of the second shell 2, a second partition plate is arranged between the second plate heat exchanger 28 and the right side wall of the second shell 2, a third partition plate and a fourth partition plate are correspondingly arranged between the first plate heat exchanger 27, the second plate heat exchanger 28 and the top wall of the second shell 2, a fifth partition plate is arranged between the first plate heat exchanger 27 and the second plate heat exchanger 28, and a sixth partition plate is arranged between the fifth partition plate and the top wall of the second shell 2. Corresponding fresh air channels and exhaust air channels are formed in the second shell 2 through the cooperation of the partition plates, and the novel air conditioner has the advantages of being simple in structure and easy to prepare. In order to enhance the functionality and applicability of the unit, in this embodiment, a first electric air valve is disposed at the fresh air port 25, a second electric air valve is disposed at the air outlet 26, and a third electric air valve is disposed at the second partition plate. This structure setting is in practical application, no matter be the cooling dehumidification operating mode in summer or winter heating operating mode, under the condition that does not need the new trend, all accessible closes first electronic blast gate, second electronic blast gate to open the third electronic blast gate, realize the quick cyclic treatment to indoor air, and have the advantage that the energy consumption is low. The specific process is as follows: return air enters the unit from the return air inlet 23, flows through the secondary side of the first plate heat exchanger 27, the secondary side of the second plate heat exchanger 28, the third electric air valve, the fourth air port 22, the second air port 12, the inner cavity of the first shell 1, the first air port 11, the third air port 21, the primary side of the first plate heat exchanger 27 and the air supply port 24 in sequence, and then is sent into a room. In the process, the air return can be subjected to circulating cooling and dehumidifying treatment through the air-water heat exchanger 13 under the refrigerating and dehumidifying working condition in summer, and can be subjected to circulating heating treatment through the air-water heat exchanger 13 under the heating working condition in winter.
As a specific embodiment, the invention is provided with the fresh air filter 281 and the fresh air induced draft fan 282 from top to bottom between the fourth partition plate and the sixth partition plate, the fresh air can be filtered through the fresh air filter 281, and the fresh air can be guided through the fresh air induced draft fan 282. And a return air filter 271 and a return air induced draft fan 272 are arranged between the third partition plate and the left side wall of the second shell 2 from top to bottom, the return air can be filtered through the return air filter 271, and the return air can be guided through the return air induced draft fan 272. Meanwhile, in the present embodiment, the blower 16, the demister 17, and the water collecting tank 18 are also provided in the first casing 1, and the blower 16 is located below the first tuyere 11, the demister 17 is located between the air-water heat exchanger 13 and the blower 16, and the water collecting tank 18 is located below the air-water heat exchanger 13. The fresh air can flow smoothly between the second shell and the first shell through the blower 16, the demister 17 can demist the fresh air, the fresh air quality is improved, and condensed water generated when the air-water heat exchanger 13 dehumidifies the fresh air can be collected through the water collecting tank 18.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solution of the present invention should fall within the scope of the present invention as defined in the claims without departing from the spirit of the present invention.
Claims (6)
1. The household water source double-plate heat recovery fresh air handling unit comprises a dehumidification unit and a heat recovery unit and is characterized in that the dehumidification unit comprises a first shell (1), a first air port (11) and a second air port (12) are correspondingly arranged on the left half part and the right half part of the top wall of the first shell (1), a gas-water heat exchanger (13) is arranged in the first shell (1), and two ports of the gas-water heat exchanger (13) are correspondingly connected with a first stop valve (14) and a second stop valve (15) which are arranged on the side wall of the first shell (1); the heat recovery unit comprises a second shell (2) fixed on the upper side of the first shell (1), a third air port (21) and a fourth air port (22) corresponding to the first air port (11) and the second air port (12) are arranged on the bottom wall of the second shell (2), an air return port (23), an air supply port (24), a fresh air port (25) and an air outlet (26) are sequentially arranged on the top wall of the second shell (2) from left to right, a first plate heat exchanger (27) and a second plate heat exchanger (28) which are distributed left to right are arranged in the second shell (2), and the first plate heat exchanger (27) and the second plate heat exchanger (28) are obliquely arranged; the passages communicated with the fresh air inlet (25), the primary side of the second plate heat exchanger (28), the fourth air inlet (22), the second air inlet (12), the inner cavity of the first shell (1), the first air inlet (11), the third air inlet (21), the primary side of the first plate heat exchanger (27) and the air supply outlet (24) are provided with fresh air channels, and the passages communicated with the return air inlet (23), the secondary side of the first plate heat exchanger (27), the secondary side of the second plate heat exchanger (28) and the air outlet (26) are provided with air exhaust channels; the inclination angle of the first plate heat exchanger (27) and the second plate heat exchanger (28) is 30-60 degrees, and the first plate heat exchanger and the second plate heat exchanger are symmetrically distributed left and right; the gas-water heat exchanger (13) is composed of a plurality of heat exchange modules made of plastic materials, each heat exchange module comprises a left main pipe (131) and a right main pipe (132) which are distributed at intervals and are vertically arranged, the left main pipe (131) and the right main pipe (132) are communicated through a plurality of heat exchange pipes (133), the upper end and the lower end of each of the left main pipe (131) and the right main pipe (132) are respectively provided with a first interface (134), and the front side wall and the rear side wall of each of the left main pipe (131) and the right main pipe (132) are respectively provided with a second interface (135) which are symmetrically distributed; adjacent heat exchange modules are connected with each other through first interfaces (134) or second interfaces (135) of the adjacent heat exchange modules in a hot-melt mode, one second interface (135) of one heat exchange module is connected with a first connector (136) through hot-melt mode, one second interface (135) of the other heat exchange module is connected with a second connector (137) through hot-melt mode, the vacant first interfaces (134) of all the heat exchange modules are respectively connected with a first plugging plate (138) through hot-melt mode, and the vacant second interfaces (135) of all the heat exchange modules are respectively connected with a second plugging plate (139) through hot-melt mode; the first air port (11) and the second air port (12) are of step hole structures with large upper part and small lower part, the bottom wall of the second shell (2) is provided with annular platforms corresponding to the first air port (11) and the second air port (12) on the periphery of the third air port (21) and the periphery of the fourth air port (22) respectively, sealing sleeves (3) are sleeved on the annular platforms, the bottoms of the sealing sleeves (3) are located between the annular platforms and the top wall of the first shell (1), and the upper ends of the sealing sleeves (3) are located in annular grooves formed in the periphery of the annular platforms on the bottom wall of the second shell (2).
2. A household water source double plate heat recovery fresh air handling unit according to claim 1, wherein the first plate heat exchanger (27) and the second plate heat exchanger (28) are inclined at 45 degrees.
3. A household water source double-plate heat recovery fresh air handling unit according to claim 1, wherein the left main pipe (131) and the right main pipe (132) adopt square pipe structures; the heat exchange tubes (133) are provided with a plurality of layers along the front-back direction, each layer comprises a plurality of heat exchange tubes (133) which are uniformly distributed along the up-down direction, and the heat exchange tubes (133) of adjacent layers are distributed in a staggered manner along the up-down direction.
4. A household water source double-plate heat recovery fresh air unit according to claim 3, wherein the lower sides of the first plate heat exchanger (27) and the second plate heat exchanger (28) are respectively in sealing connection with the bottom wall of the second shell (2), a first partition plate is arranged between the first plate heat exchanger (27) and the left side wall of the second shell (2), a second partition plate is arranged between the second plate heat exchanger (28) and the right side wall of the second shell (2), a third partition plate and a fourth partition plate are correspondingly arranged between the first plate heat exchanger (27), the second plate heat exchanger (28) and the top wall of the second shell (2), a fifth partition plate is arranged between the first plate heat exchanger (27) and the second plate heat exchanger (28), and a sixth partition plate is arranged between the fifth partition plate and the top wall of the second shell (2).
5. A household water source double-plate heat recovery fresh air handling unit according to claim 4, wherein the fresh air port (25) is provided with a first electric air valve, the air outlet (26) is provided with a second electric air valve, and the second partition plate is provided with a third electric air valve.
6. The household water source double-plate heat recovery fresh air unit according to claim 5, wherein a fresh air filter (281) and a fresh air draught fan (282) are arranged between the fourth partition plate and the sixth partition plate from top to bottom; a return air filter (271) and a return air induced draft fan (272) are arranged between the third partition plate and the left side wall of the second shell (2) from top to bottom; the first shell (1) is internally provided with a blower (16), a demister (17) and a water collecting tank (18), the blower (16) is positioned at the lower side of the first air port (11), the demister (17) is positioned between the air-water heat exchanger (13) and the blower (16), and the water collecting tank (18) is positioned at the lower side of the air-water heat exchanger (13).
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| CN201811223175.3A CN109186008B (en) | 2018-10-19 | 2018-10-19 | Household water source double-plate heat recovery fresh air handling unit |
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| CN201811223175.3A CN109186008B (en) | 2018-10-19 | 2018-10-19 | Household water source double-plate heat recovery fresh air handling unit |
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| CN109186008B true CN109186008B (en) | 2023-11-28 |
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| EP3039367B1 (en) * | 2013-08-29 | 2019-10-23 | Linde Aktiengesellschaft | Method for manufacturing a plate heat exchanger with a plurality of heat exchanger blocks connected with solder-coated holders |
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| CN104508417A (en) * | 2012-06-11 | 2015-04-08 | 7Ac技术公司 | Methods and systems for turbulent, corrosion resistant heat exchangers |
| CN204534907U (en) * | 2014-07-07 | 2015-08-05 | 绿能新风环境科技(北京)有限公司 | Heat-exchange system |
| CN105486125A (en) * | 2016-01-11 | 2016-04-13 | 芜湖美的厨卫电器制造有限公司 | Heat exchanger and water heater |
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