CN106440281A - Total heat exchanger and frost prevention and removal system thereof - Google Patents

Total heat exchanger and frost prevention and removal system thereof Download PDF

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Publication number
CN106440281A
CN106440281A CN201610860152.8A CN201610860152A CN106440281A CN 106440281 A CN106440281 A CN 106440281A CN 201610860152 A CN201610860152 A CN 201610860152A CN 106440281 A CN106440281 A CN 106440281A
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CN
China
Prior art keywords
temperature
heat exchanger
air
fresh air
frost prevention
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Pending
Application number
CN201610860152.8A
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Chinese (zh)
Inventor
宋孟杰
陈颖
黄文毅
廖立元
罗向龙
郑晓生
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Guangdong University of Technology
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Guangdong University of Technology
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Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN201610860152.8A priority Critical patent/CN106440281A/en
Publication of CN106440281A publication Critical patent/CN106440281A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost

Abstract

The invention discloses a frost prevention and removal system of a total heat exchanger. The frost prevention and removal system of the total heat exchanger comprises an exhaust air region, a fresh air region, a connecting air tube, temperature sensors, a valve and a controller, wherein the exhaust air region is isolated from the fresh air region by a heat exchange plate; an exhaust air ventilating opening is formed in a tube wall at an exhaust air inlet of the exhaust air region; a fresh air ventilating opening is formed in a tube wall at a fresh air inlet of the fresh air region; the exhaust air ventilating opening communicates with the fresh air ventilating opening by the connecting air tube; the temperature sensors are arranged on the heat exchange plate; the valve is arranged on the connecting air tube and is used for controlling opening and closing of the tube; and the controller is respectively connected with the valve and the temperature sensors and acquires detection temperature to control the valve to be closed when the detection temperature is higher than preset temperature and control the valve to be opened when the detection temperature is lower than the preset temperature. According to the frost prevention and removal system, frost is removed by waste heat of exhaust air, extra energy does not require to be provided, and therefore, the frost prevention and removal system of the total heat exchanger is energy-saving and environmentally friendly. The frost prevention and removal system of the total heat exchanger can prevent frosting, and heat exchange efficiency is improved. The invention further discloses a total heat exchanger comprising the frost prevention and removal system.

Description

A kind of total-heat exchanger and its frost prevention remove defrosting system
Technical field
A kind of the present invention relates to heat exchanger technology field, more particularly, it relates to the frost prevention defrosting system of total-heat exchanger System, further relates to the total-heat exchanger that a kind of above-mentioned frost prevention of inclusion removes defrosting system.
Background technology
Total-heat exchanger improves many advantages, such as indoor air quality and reducing energy consumption and has obtained widely should because it has With.Its operation principle is substantially:During product work, orthogonal thereto fork mode flows through heat exchanger core body respectively for indoor exhaust wind and fresh air When, due to splitter plate, that is, heat exchanger plates two sidewind there is the temperature difference and vapor partial pressure is poor, and two strands of air-flows pass through to separate Assume heat and mass phenomenon during plate, cause Total heat exchange process.During summer operation, fresh air obtains cold from air conditioning air exhaust, makes temperature Degree reduces, and is dried by air-conditioner wind simultaneously, so that fresh air water capacity is reduced;During winter operation, from air conditioning chamber, air draft obtains heat to fresh air, Temperature raises.So, by the entirely hot heat transfer process of heat exchange core body, fresh air is allowed to recover energy from air conditioning air exhaust.
However, total-heat exchanger has very big obstacle in the application of severe cold and cold district, it is mainly reflected in that heat is handed over entirely The easy frosting of parallel operation center heat exchange plate surface, leads to its heat exchange efficiency rapidly to reduce.In prior art, how preheated by preheater or The methods such as person's electric heated defrosting are to defrost.However, needing to consume extra energy (electricity using preheater preheating and electric heated defrosting Can or heat energy) heating fresh air, the consumption of therefore additional energy source makes total-heat exchanger heat energy recycle rate reduce, simultaneously Make system architecture complicated, easily cause the potential safety hazards such as electric leakage.Once there is operation and operational failure, the heat of system also can be reduced Organic efficiency.
In sum, the problems such as how to efficiently solve total-heat exchanger heat exchange plate surface frosting impact heat exchange efficiency, be Those skilled in the art's urgent problem at present.
Content of the invention
In view of this, first purpose of the present invention is to provide a kind of frost prevention of air-to-air total heat exchanger to remove defrosting system, and this is prevented Frost affects the problem of heat exchange efficiency except the structure design of defrosting system can efficiently solve total-heat exchanger heat exchange plate surface frosting, Second object of the present invention is the air-to-air total heat exchanger providing a kind of above-mentioned frost prevention of inclusion to remove defrosting system.
In order to reach above-mentioned first purpose, the present invention provides following technical scheme:
A kind of frost prevention of air-to-air total heat exchanger removes defrosting system, including exhaust zone and fresh air area, described exhaust zone and described fresh air Separated by heat exchanger plates between area;Also include:
Connect airduct, the air draft porch tube wall of described exhaust zone offer air draft ventilating opening, described fresh air area new Fresh air ventilating opening is offered on the tube wall of wind porch, passes through between described air draft ventilating opening and described fresh air ventilating opening to be connected airduct Connection;
Temperature sensor, is arranged on described heat exchanger plates;
Valve, is arranged at the described opening and closing connecting and being used for control piper on airduct;
Controller, is connected with described valve and described temperature sensor respectively and obtains detection temperature, with described detection Temperature controls described valve closing when being higher than preset temperature, and controls described when described detection temperature is less than described preset temperature Valve opening.
Preferably, above-mentioned frost prevention removes in defrosting system, and described valve is arranged at described connection airduct and divulges information near described air draft One end of mouth.
Preferably, above-mentioned frost prevention removes in defrosting system, and described preset temperature is the critical-temperature that frosting in described heat exchanger plates.
Preferably, above-mentioned frost prevention removes in defrosting system, and the air draft side of described heat exchanger plates is evenly arranged with multiple described temperature and passes Sensor.
Preferably, above-mentioned frost prevention removes in defrosting system, and the air draft side of described heat sink is evenly arranged with three row and often goes with pre- If interval is evenly arranged with three described temperature sensors.
Preferably, above-mentioned frost prevention remove defrosting system in, be provided with temperature sensor at described fresh air inlet, and with described control Device connects.
Preferably, above-mentioned frost prevention removes in defrosting system, and described temperature sensor is thermocouple.
Preferably, above-mentioned frost prevention removes in defrosting system, and described controller is used for the detection according to each described temperature sensor Result and logic of propositions calculate and obtain detection temperature, and control described valve to close when described detection temperature is higher than preset temperature Close, and control described valve opening when described detection temperature is less than described preset temperature.
Preferably, above-mentioned frost prevention removes in defrosting system, and described controller is used for when the detection temperature of each described temperature sensor Degree is above during described preset temperature controlling described valve closing, and works as the detection of at least one in multiple described temperature sensors Temperature controls described valve opening when being less than described preset temperature.
The frost prevention of the air-to-air total heat exchanger that the present invention provides includes exhaust zone, fresh air area, connects airduct, temperature biography except defrosting system Sensor, valve and controller.Wherein, separated by heat exchanger plates between exhaust zone and fresh air area, the air draft porch pipe of exhaust zone Wall offers air draft ventilating opening, and tube wall at the fresh air inlet in fresh air area offers fresh air ventilating opening, and air draft ventilating opening is with newly Pass through between wind ventilating opening to connect airduct connection;Temperature sensor is arranged on heat exchanger plates to obtain corresponding testing result, valve It is arranged on connection airduct;Temperature sensor and valve are all connected with controller, and controller obtains according to the testing result of sensor Take detection temperature, and then controller control valve is closed when detection temperature is higher than preset temperature, and be less than institute in detection temperature State controller control valve during preset temperature to open.
When the frost prevention of the air-to-air total heat exchanger that the application present invention provides removes defrosting system, the relatively low outdoor fresh air of temperature passes through fresh air Entrance enters heat recovery system, and meanwhile, the higher indoor exhaust wind of temperature enters heat recovery system, fresh air and row by air draft entrance After wind carries out caloic exchange in heat recovery system, fresh air is sent through fresh air outlet, and air draft is discharged through wind exhausting outlet.Here mistake Cheng Zhong, temperature sensor detect heat exchanger plates temperature, controller obtain detection temperature, be designated as Ti, and compare detection temperature Ti with The size of preset temperature Ts.When outdoor fresh air temperature drop, if detection temperature Ti is less than the preset temperature Ts setting, send out Go out to execute signal and be sent to valve, valve is opened.After valve is opened, part air draft initially enters air draft ventilating opening, by even Air duct flows to fresh air side, carries out control with changed scale with fresh air and mixes, i.e. frost prevention defrosting system starts.Wherein, enter fresh air area Air draft QRowAccount for fresh air area total blast volume QAlwaysRatio be R, i.e. R=QRow/QAlways.As time goes on, R persistently increases, from fresh air The mixing air temperature that side enters heat exchanger plates accordingly raises.Until when detection temperature Ti is gone up to more than preset temperature, controller control Valve closing processed, i.e. frost prevention defrosting system stalls.In sum, mixed with fresh air control with changed scale using air draft, effective land productivity Defrosted with the waste heat of air draft, be not required to provide extra energy, energy-conserving and environment-protective.Meanwhile, can effectively pre- antifrost, improve heat The heat exchange efficiency of recovery system.And, present configuration is simple, high degree of automation, saves electric power, and whole design is succinctly high Effect, good manufacturability, take up room little, financial cost is low, there is very big future in engineering applications.
In order to reach above-mentioned second purpose, present invention also offers a kind of air-to-air total heat exchanger, this air-to-air total heat exchanger includes Any of the above-described kind of frost prevention removes defrosting system.Due to above-mentioned frost prevention except defrosting system has above-mentioned technique effect, there is this frost prevention defrosting The air-to-air total heat exchanger of system also should have corresponding technique effect.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable Other accompanying drawings are obtained according to these accompanying drawings.
The frost prevention of the air-to-air total heat exchanger that Fig. 1 provides for the present invention is shown except a kind of front view structure of specific embodiment of defrosting system It is intended to;
Fig. 2 is the overlooking the structure diagram of Fig. 1;
Fig. 3 is the mounting structure schematic diagram connecting airduct;
Fig. 4 is the positioning arrangement schematic diagram of heat exchanger plates air draft side surface thermocouple;
Fig. 5 is control principle schematic diagram.
In accompanying drawing, mark is as follows:
Air draft entrance 1;Wind exhausting outlet 2;Exhaust fan 3;Temperature sensor 4;Heat exchanger plates 5;Air draft ventilating opening 6;Fresh air is led to Air port 7;Fresh air inlet 8;Fresh-air fan 9;Fresh air outlet 10;Temperature control circuitry 11;Connect airduct 12;Valve 13.
Specific embodiment
The embodiment of the invention discloses a kind of frost prevention of air-to-air total heat exchanger removes defrosting system, with effectively pre- antifrost and without volume Outer consumed energy.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1-Fig. 5, the frost prevention of the air-to-air total heat exchanger that Fig. 1 provides for the present invention removes a kind of specific embodiment party of defrosting system The main structure diagram of formula;Fig. 2 is the overlooking the structure diagram of Fig. 1;Fig. 3 is the mounting structure schematic diagram connecting airduct;Fig. 4 Positioning arrangement schematic diagram for heat exchanger plates air draft side surface thermocouple;Fig. 5 is control principle schematic diagram.
In a kind of specific embodiment, the present invention provide air-to-air total heat exchanger frost prevention except defrosting system include exhaust zone, Fresh air area, connection airduct 12, temperature sensor 4, valve 13 and controller.
Wherein, separated by heat exchanger plates 5 between exhaust zone and fresh air area, the side of heat exchanger plates 5 is air draft side, and opposite side is Fresh air side.Exhaust zone generally comprises air draft entrance 1, wind exhausting outlet 2 and is arranged at the exhaust fan 3 at wind exhausting outlet 2.Fresh air area Export 10 and be arranged at the fresh-air fan 9 at fresh air outlet 10 including fresh air inlet 8, fresh air.During work, indoor exhaust wind and fresh air Orthogonal thereto fork mode flows through heat exchanger respectively, and 5 liang of sidewinds of heat exchanger plates there is the temperature difference and vapor partial pressure is poor, and two strands of air-flows pass through Carry out heat exchange during demarcation strip.
At the air draft entrance 1 of exhaust zone, tube wall offers air draft ventilating opening 6, opens at the fresh air inlet 8 in fresh air area on tube wall It is provided with fresh air ventilating opening 7, and connected by being connected airduct 12 between air draft ventilating opening 6 and fresh air ventilating opening 7.Namely pass through to connect Fresh air inlet 8 is connected by airduct 12 with air draft entrance 1.Connect airduct 12 on be provided with valve 13, by the opening and closing of valve 13 with Control the opening and closing connecting airduct 12 pipeline, when valve 13 is opened, the part air draft at air draft entrance 1 is then entered by connection airduct 12 Enter fresh air inlet 8, mix with fresh air.
Temperature sensor 4 is arranged on heat exchanger plates 5, is generally positioned at the air draft side of heat exchanger plates 5.By temperature sensor 4 The temperature of monitoring heat exchanger plates 5, the opening and closing for controller control valve door 13 provides foundation.The type precision of actual temp sensor 4 And set location etc. can be configured according to actual conditions.Controller is connected with temperature sensor 4 and valve 13 respectively, Jin Ergen Testing result according to sensor obtains detection temperature, and when detection temperature is higher than preset temperature, control valve 13 is closed, and in inspection When testing temperature is less than preset temperature, control valve 13 is opened.Specific controller can integrate with valve 13, such as adopts Temperature sensitive valve etc..
When the frost prevention of the air-to-air total heat exchanger that the application present invention provides removes defrosting system, the relatively low outdoor fresh air of temperature passes through fresh air Entrance 8 enter heat recovery system, meanwhile, the higher indoor exhaust wind of temperature by air draft entrance 1 enter heat recovery system, fresh air and After air draft carries out caloic exchange in heat recovery system, fresh air is sent through fresh air outlet 10, and air draft is discharged through wind exhausting outlet 2. In the process, temperature sensor 4 detects the temperature of heat exchanger plates 5, and controller obtains its detection temperature, is designated as Ti, and compares inspection Testing temperature Ti and preset temperature Ts, when outdoor fresh air temperature drop, if detection temperature Ti is less than the default temperature that valve 13 sets During degree Ts, then send execution signal and be sent to valve 13, valve 13 is opened.After valve 13 is opened, part air draft initially enters Air draft ventilating opening 6, flows to fresh air side by connecting airduct 12, carries out control with changed scale with fresh air and mix, i.e. frost prevention starts except defrosting system Work.Wherein, enter the air draft Q in fresh air areaRowAccount for fresh air area total blast volume QAlwaysRatio be R, i.e. R=QRow/QAlways.Pushing away over time Move, R persistently increases, and accordingly raises from the mixing air temperature of fresh air side entrance center heat exchanger plates 5.Until detection temperature Ti go up to During more than preset temperature Ts, controller control valve door 13 is closed, and that is, frost prevention defrosting system stalls, so circulate.To sum up institute State, mixed with fresh air control with changed scale using air draft, the waste heat efficiently utilizing air draft is defrosted, be not required to provide extra energy Amount, energy-conserving and environment-protective.Meanwhile, can effectively pre- antifrost, improve heat recovery system heat exchange efficiency.And, present configuration is simple, High degree of automation, saves electric power, and whole design is succinctly efficient, and good manufacturability takes up room little, financial cost is low, has very Big future in engineering applications.
Specifically, valve 13 is arranged at connection airduct 12 near one end of air draft ventilating opening 6.And then close in valve 13 When, exhaust concentrates on exhaust area flowing and carries out heat exchange with fresh air, reduces in the storage connecting exhaust in airduct 12, thus ensureing to change The thermal efficiency.It is of course also possible to valve 13 is arranged at middle part or the one end near fresh air ventilating opening 7 connecting airduct 12.Root According to needing to be respectively provided with valve 13 at the two ends connecting airduct 12, thus the opening and closing of pipeline is effectively ensured, positioned at one end When valve 13 breaks down, still can be closed by valve 13 control piper of the other end.
Further, the critical-temperature of frosting for heat exchanger plates 5 in preset temperature.Namely preset when detection temperature is less than During temperature, will frosting in heat exchanger plates 5, the initial temperature that is, frosting occurs.Preset temperature is set to heat exchanger plates 5 occur tying The critical-temperature of frost, can farthest prevent heat exchanger plates 5 frost.Default temperature can also suitably be adjusted as needed Degree, that is to say the temperature threshold of adjustment Open valve 13, is such as set above a certain temperature of above-mentioned critical-temperature etc..
Preset temperature can be demarcated by way of test, such as by providing a system to different new air temperatures and air draft temperature Degree, temperature sensor 4 carries out real time temperature monitoring.Observe the frosting situation of heat exchanger plates 5 simultaneously, record heat exchanger plates 5 no frosting shape The lowest detection temperature of corresponding temperature sensor 4.It is circulated experiment under different operating modes, finally choose multiple cyclic test and obtain Minimum of a value in the lowest detection temperature obtaining is the preset temperature Ts under each operating mode as preset temperature, this temperature value.
The problems such as mistake for avoiding heat exchanger plates 5 non-uniform temperature to cause defrosts, further, can be in heat exchanger plates 5 Air draft side arranges multiple temperature sensors 4, and multiple temperature sensor 4 is uniformly distributed.Thus, by multiple temperature sensors 4 Setting, be capable of the temperature of more comprehensively reacting replacing heat plate 5.
Specifically, the air draft side of heat sink can be uniformly arranged three row and often row be evenly arranged with three with predetermined interval Temperature sensor 4.Namely nine temperature sensors 4 are set in the air draft side of heat sink, in three row three column distribution.Preferably, Center heat exchanger plates 5 are divided into three row three and arrange totally nine shape identical rectangles, TEMP is set in the center of each rectangle Device 4.By arranging nine temperature sensors 4, can preferably take into account the temperature of heat exchanger plates 5 central temperature and its surrounding, more Comprehensively reflect the distribution situation of heat exchanger plates 5 temperature, the mistake that the uneven frosting on its surface causes can be prevented effectively from simultaneously and remove Frost, the final control accuracy improving system.Certainly, air draft side temperature sensor can also be increased or decreased as needed further 4 number, according to heat exchanger plates 5 profiling temperatures it is also possible to suitably adjust the distributing position of temperature sensor 4.
Further, it is provided with temperature sensor 4 at fresh air inlet 8, and be connected with controller.Namely temperature sensor 4 both include being arranged at the temperature sensor 4 of heat exchanger plates 5 air draft side, also include being arranged at the temperature sensor 4 at fresh air inlet 8. It is respectively used to detect the temperature at the hot temperature changing plate and fresh air inlet 8, by multiple temperature measuring points, temperature is monitored, Improve the control accuracy of system further.Typically a temperature sensor 4 is set at fresh air inlet 8 and can meet monitoring need Ask, certainly as needed, the temperature sensor 4 at fresh air inlet 8 can also arrange multiple.
Temperature sensor 4 in above-described embodiment is specifically as follows thermocouple.Structure is simple, is easily installed, accuracy of detection Control can be met require.And the temperature of corresponding position can be directly read by thermocouple, it is easy to subsequent control and judge.When So, the sensor for detection temperature of other routines can also be adopted as needed.
On the basis of the various embodiments described above, controller is used for the testing result according to each temperature sensor 4 and presets Logical calculated obtains detection temperature Ti, and control valve 13 is closed when detection temperature Ti is higher than preset temperature, and in detection temperature When degree Ti is less than preset temperature Ts, control valve 13 is opened.In the testing result control valve 13 by a temperature sensor 4 During opening and closing, then using the testing result of this temperature sensor 4 as detection temperature Ti, controller is according to detection temperature Ti and default temperature The relation control valve 13 of degree Ts is opened and closed.And when being according to being controlled with the testing result of multiple temperature sensors 4, then may be used To send the testing result of each temperature sensor 4 to controller, controller obtains detection according to the default logical calculated that calculates Temperature Ti, this detection temperature Ti is the testing result of each temperature sensor 4 comprehensive comprehensive measurement to delivery temperature, also It is by each corresponding temperature of temperature sensor 4 is calculated acquisition detection temperature Ti with logic of propositions.Specific calculating logic Can be configured according to factors such as the positions of temperature sensor 4, be not especially limited herein.For example take each temperature sensor 4 The average of testing result is as detection temperature Ti etc..It is opened and closed in the testing result control valve 13 by a temperature sensor 4 In the case of, then preset the testing result that calculating logic can be equal to temperature sensor 4 for detection temperature Ti.
It is specifically as follows according to the control process of detection temperature Ti:Positioned at the thermocouple of heat exchanger plates 5 with positioned at fresh air inlet 8 The detection temperature that records of thermocouple be Ti, processes temperature signal is to be sent to valve 13 after execution signal by controller.Work as Ti During not up to preset temperature Ts, open in valve 13, control fresh air to mix with air draft, frost prevention defrosting mode starts, and improves and changes The temperature of the mixing wind of hot plate 5 contact, until when Ti gos up to more than Ts, valve 13 is closed, anti-frost pattern stops.Treat temperature When degree sensor 4 monitors that detection temperature Ti is less than preset temperature Ts, frost prevention restarts except defrosting system, so circulates.
At fresh air inlet 8 and in the case that heat exchanger plates 5 are provided with temperature sensor 4, preset temperature can pass through as follows Mode sets:Provide a system to different new air temperatures and temperature of outgoing air, temperature sensor 4 is to new air temperature and heat exchanger plates 5 Temperature is monitored;Observe the frosting situation of heat exchanger plates 5, the minimum temperature of record heat exchanger plates 5 no frosting state simultaneously;In difference It is circulated experiment, final selection can prevent the minimum temperature of heat exchanger plates 5 frosting as systemic presupposition value, this temperature value under operating mode I.e. Ts under each operating mode.Namely under different temperature sensor 4 set-up modes, all frosting can be determined by test adjustment The critical condition of corresponding temperature sensor 4 in situation, and then determines preset temperature.
It is explained above a kind of control mode of controller, as needed it is also possible to be provided for controller when every The detection temperature of individual temperature sensor 4 is above control valve 13 during preset temperature and closes, and works as in multiple temperature sensors 4 extremely When the detection temperature of few is less than preset temperature, control valve 13 is opened.Namely when being provided with multiple temperature sensor 4, Each temperature sensor 4 detects the temperature of correspondence position and sends to controller, controller is respectively with each TEMP respectively The testing result of device 4, that is, temperature value is as the detection temperature of each temperature sensor 4, thus when there being at least one detection temperature Open less than control valve during preset temperature 13, and control valve 13 is closed when each detection temperature is above preset temperature. It is arranged such, farthest prevent frost.As needed it is also possible to be set to when the detection of each temperature sensor 4 Temperature is above control valve 13 during preset temperature and closes, and the detection temperature working as each temperature sensor 4 is below default temperature When spending, control valve 13 is opened, thus can be prevented effectively from defrosting by mistake.
The frost prevention that the present invention provides removes defrosting system, and system exchanges hot plate 5 and the temperature of outdoor fresh air carries out real-time monitoring, and By this temperature signal immediate feedback to controller;Controller can be integrated with valve 13, as temperature sensitive valve, temperature sensitive valve and thermoelectricity Occasionally connected by temperature control circuitry 11, and then temperature sensitive valve is according to the temperature signal automatic regulating switch of thermocouple.With no-load voltage ratio The method of the mixed wind of example solves the problems, such as the frosting of total-heat exchanger from source;By connecting airduct 12, part air draft is transferred to Fresh air side, is mixed with fresh air control with changed scale, is sufficiently used the waste heat of air draft, and capacity usage ratio is high;Thermocouple homalographic equal Even be arranged in heat exchanger plates 5 surface, the mistake defrosting operation causing because of uneven frosting can be prevented effectively from, improve the control essence of system Degree;It is arranged in the thermocouple at heat exchanger plates 5 surface and fresh air inlet 8, the frosting situation of new air temperature and heat exchanger plates 5 is risen in real time The effect of monitoring, in advance to it may happen that frozen condition respond, have advanced, system automation degree is high, can have Effect prevents frosting;It is arranged on the connection temperature sensitive valve near air draft side one end for the airduct 12 to be connected with multiple thermocouples, composition is automatically Control system.When thermocouple measured temperature Ti is reduced to Ts, detection signal is fed back to temperature sensitive valve, temperature sensitive valve is opened, When temperature is increased to Ts, valve 13 is closed it is achieved that air draft and automatically controlling that fresh air control with changed scale mixes;Temperature sensitive valve root Automatically adjust opening and closing according to temperature signal, simple, it is not required to set up the execution power-equipment such as motor, required little energy, initial cost Low;Before frost prevention removes defrosting system work, the setting that temperature sensitive valve executes temperature Ts, the party need to be completed by tentatively default experiment Method is simple and practical, can improve the operating efficiency of control logic.
Defrosting system is removed based on the frost prevention providing in above-described embodiment, present invention also offers a kind of air-to-air total heat exchanger, this is complete Heat exchanger includes any one frost prevention in above-described embodiment and removes defrosting system.Because this air-to-air total heat exchanger employs above-described embodiment In frost prevention remove defrosting system, so the beneficial effect of this air-to-air total heat exchanger refer to above-described embodiment.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one The scope the widest causing.

Claims (10)

1. a kind of frost prevention of air-to-air total heat exchanger removes defrosting system, including exhaust zone and fresh air area, described exhaust zone and described fresh air area Between separated by heat exchanger plates;It is characterized in that, also include:
Connect airduct, the air draft porch tube wall of described exhaust zone offers air draft ventilating opening, the fresh air in described fresh air area enters Offer fresh air ventilating opening on tube wall at mouthful, pass through between described air draft ventilating opening and described fresh air ventilating opening to be connected airduct even Logical;
Temperature sensor, is arranged on described heat exchanger plates;
Valve, is arranged at the described opening and closing connecting and being used for control piper on airduct;
Controller, is connected with described valve and described temperature sensor respectively and obtains detection temperature, with described detection temperature Control described valve closing during higher than preset temperature, and control described valve when described detection temperature is less than described preset temperature Open.
2. frost prevention according to claim 1 remove defrosting system it is characterised in that described valve be arranged at described connection airduct lean on One end of closely described air draft ventilating opening.
3. frost prevention according to claim 1 removes defrosting system it is characterised in that described preset temperature is described heat exchanger plates appearance The critical-temperature of frosting.
4. frost prevention according to claim 1 removes defrosting system it is characterised in that the air draft side of described heat exchanger plates is evenly arranged with Multiple described temperature sensors.
5. frost prevention according to claim 4 removes defrosting system it is characterised in that the air draft side of described heat sink is evenly arranged with Three row and often row are evenly arranged with three described temperature sensors with predetermined interval.
6. frost prevention according to claim 4 removes defrosting system it is characterised in that being provided with TEMP at described fresh air inlet Device, and be connected with described controller.
7. frost prevention according to claim 6 removes defrosting system it is characterised in that described temperature sensor is thermocouple.
8. the frost prevention according to any one of claim 4-7 removes defrosting system it is characterised in that described controller is used for according to every The testing result of individual described temperature sensor and logic of propositions calculate and obtain detection temperature, and are higher than default in described detection temperature Control described valve closing during temperature, and control described valve opening when described detection temperature is less than described preset temperature.
9. the frost prevention according to any one of claim 4-7 removes defrosting system it is characterised in that described controller is used for when each The detection temperature of described temperature sensor is above during described preset temperature controlling described valve closing, and works as multiple described temperature In sensor, the detection temperature of at least one controls described valve opening when being less than described preset temperature.
10. a kind of air-to-air total heat exchanger is it is characterised in that the frost prevention including as described in any one of claim 1-9 removes defrosting system.
CN201610860152.8A 2016-09-28 2016-09-28 Total heat exchanger and frost prevention and removal system thereof Pending CN106440281A (en)

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