CN105222337A - Parallel mutual defrosting air source heat pump water heater - Google Patents
Parallel mutual defrosting air source heat pump water heater Download PDFInfo
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Abstract
The invention discloses the technical scheme of parallel mutual defrosting air source heat pump water heater, it is characterized in that: unit has two or more refrigerant circuit systems, point two groups of successively defrostings; The air inlet duct dividing plate of two group systems is isolated, the water inlet of the hot water heat exchanger of each system and the delivery port of water circulating pump are connected in parallel, the delivery port of each hot water heat exchanger all divides two-way interface, one tunnel is parallel-connected to out hot-water supply main after connecing constant temperature outlet valve again, another road is parallel-connected to recirculated water main after connecing check valve again, recirculated water main and water inlet pipe that recirculated water control valve is housed together are parallel to water circulating pump water inlet, the hot water heat-exchange system of the parallel hot water Inner eycle of formation; During defrosting, the systematic evaluation carrying out defrosting is to bypass hot gas or reverse circulation defrosting, and another group system continues to heat circulation, and through hot water Inner eycle, two groups of defrostings of helping each other, thoroughly solve a defrosting difficult problem for air source hot pump water heater, forever without the sorrow that defrosting is unclean; In addition, add the system of subcooler, still can raise the efficiency 15%.
Description
Technical field
The present invention relates to Teat pump boiler technical field.
Background technology
Air source hot pump water heater absorbs heat from air, and for hot water for life after promoting temperature, Energy Efficiency Ratio is in 2.5 ~ 4 scopes.So, be energy-conservation good product.But air source heat pump is when temperature uses close to zero degree wet weather in the winter time, and easy frosting, defrosting is thorough, inefficiency.Due to directly-heated type air source hot pump water heater, the hot water that the water inlet that how low water temperature is no matter directly can export design temperature continuously after Teat pump boiler heating, hot water stay in grade, Teat pump boiler starts can obtain hot water, has a lot of advantage than compared with storage tank circulating-heating mode; Because need could obtain hot water after Teat pump boiler runs the long duration with storage tank circulating-heating mode, and when water tank water temperature is close to setting high temperature, Teat pump boiler efficiency is low, the easy superelevation of condensing pressure, because hot water uses the restriction of fluctuating range, heat storage water tank volume can not all utilize.But the defrosting of directly-heated type air source hot pump water heater encounters a difficulty, because no matter adopt recycled back or bypass hot gas defrosting mode, all because there is no low-temperature heat source, cannot carry out; And adopting electric heated defrosting, cost is large, and energy consumption is large, and the electric heating tube be arranged on wind regime evaporimeter usually but hinders heat exchange, and because electric heating tube and frosting pipe have distance when defrosting, non-immediate is conducted heat, and defrosting efficiency is very low.Therefore, current Teat pump boiler all can only rest on hot water heat exchanger and heat storage water tank systemic circulation mode of heating, utilizes the hot water of heat storage water tank to defrost.Therefore need to study new Defrost method, thoroughly solve directly-heated type air source hot pump water heater defrosting problem.The applicant had once applied for " air source hot pump water heater of defrosting of helping each other and five circulation double heat source heat pump water heaters ", application number 201020240385.6 and " help each other Defrost method and the five circulation double heat source heat pump water heaters of air source hot pump water heater " application number 201010211846.1, the water route of the condenser of two groups of Teat pump boilers of its defrosting of helping each other is series connection, when not defrosting use, the condensing pressure of two groups of heat pumps there will be one high and one low situation, is further improved.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing single air source hot pump water heater, the present invention proposes the air source hot pump water heater of parallel mutual defrosting, can without the need to the hot water heat of auxiliary electrical thermal source and heat storage water tank, realize thoroughly defrosting fast, and when using frostless season, the condensing pressure of two groups of air source hot pump water heaters of parallel mutual defrosting can not be out of balance, thus air source heat pump can efficiently be worked throughout the year.
The technical solution used in the present invention is described as follows: the air source hot pump water heater of parallel mutual defrosting, includes refrigerant circuit systems, hot water heat-exchange system, signals collecting and circuit control system; Described refrigerant circuit systems includes compressor, hot water heat exchanger, filter, reservoir, flow controller, wind regime evaporimeter, gas-liquid separator etc.; Wind regime evaporimeter is furnished with fan.
It is characterized in that: described parallel mutual defrosting air source heat pump water heater, have two respective independently refrigerant circuit systems at least, the water route inlet parallel of the hot water heat exchanger of each refrigerant circuit systems condenser is connected with the water inlet main of hot water heat exchanger, a water route outlet point two-way for each hot water heat exchanger is connected with the water inlet of constant temperature water flow control valve and the import of Inner eycle water one-way valve respectively, the delivery port of each constant temperature water flow control valve in parallel with go out hot-water supply main and be connected, the outlet parallel connection of each Inner eycle water one-way valve is connected with the main of Inner eycle water, circulating water flow adjustable valve the main of Inner eycle water is equipped with, one of two parallel interfaces of the water side of the main of Inner eycle water and the water inlet of water circulating pump are connected, water circulating pump delivery port is connected with the water inlet main of water-to-water heat exchanger group, two of two parallel interfaces of water circulating pump import are connected with supplementary water inlet pipe, and supplementary water inlet pipe is provided with entering water electromagnetic valve and water feeding one-way valve, the main of Inner eycle water and go out between hot-water supply main to be also connected with manual outlet pipe for subsequent use, manual outlet pipeline for subsequent use is provided with a water flow manual modulation valve, form the hot water heat-exchange system of parallel hot water Inner eycle thus, each independent refrigerant circuits system of parallel mutual defrosting air source heat pump water heater divides the successively defrosting of two or more defrosting group, the air inlet duct dividing plate of the wind regime evaporimeter of the refrigerant circuit systems of different defrosting group is isolated, and the number of the refrigerant circuit systems of defrosting group simultaneously must not exceed the half of the refrigerant circuit systems sum of unit, the defrosting order of different defrosting group is undertaken by setting order or sorts by the priority sending defrosting signal, when source pump obtains the signal requiring defrosting, first defrost cycle is carried out by the refrigerant circuit systems of a certain defrosting group of agreement, other defrosting group continues water heating circulation, the system defrosted in the ban exits defrost cycle, and after recovering the circulation of normal water heating, other waits for that the system of defrosting group sequentially enters defrost cycle again, in the system defrost process of certain defrosting group, the hot water that other system produces, by the hot water Inner eycle of hot water heat-exchange system, constantly to the heat of the system conveying defrosting defrosted, defrosting is fast thoroughly, when the defrosting of complete machine each system is complete, complete machine defrost process terminates, and recovers the circulation of normal water heating, in complete machine defrost process, low or high automatically according to respective hot water heat exchanger leaving water temperature of constant temperature water flow control valve corresponding to each refrigerant circuit systems, automatic closedown or unlatching, the whole system remaining heat that defrosts also can be exported by constant temperature water flow control valve, the defrost cycle of refrigerant circuit systems, according to the constituted mode of refrigerant circuit systems, or adopts bypass hot gas to help each other Defrost mode, or adopts reverse circulation to help each other Defrost mode, bypass hot gas is helped each other Defrost mode, increase in refrigerant circuit systems and have bypass hot gas line, described bypass hot gas line is connected between the refrigerant outlet of hot water heat exchanger and the inlet of wind regime evaporimeter, and bypass hot gas line is provided with defrost valve, when defrost cycle, open defrost valve, cold-producing medium absorbs from hot water heat exchanger the heat that other system provides and removes frost, reverse circulation is helped each other Defrost mode, need to increase cross valve between the exhaust outlet of compressor in refrigerant circuit system and the refrigerant inlet of hot water heat exchanger, during reverse circulation, cross valve coil has electricity from becoming without electricity, switches cross valve path direction, hot water heat exchanger in defrost cycle as evaporimeter, cold-producing medium absorbs the heat of vaporization that other system provides wherein, through compressor compression, enter wind regime evaporimeter, release heat of condensation defrosting.
Described parallel mutual defrosting air source heat pump water heater, different according to the form that its refrigerant circuit systems is formed, there are five kinds of forms.
The first, a kind of parallel mutual defrosting air source heat pump water heater adopting bypass hot gas defrosting, described refrigerant circuit systems also includes the bypass hot gas line of defrost valve and defrosting; Its connected mode is, by the refrigerant passage of compressor, hot water heat exchanger, reservoir, filter, flow controller, wind regime evaporimeter, gas-liquid separator, compressor sequentially series connection, forms the refrigerant loop of water heating circulation; Between the refrigerant outlet and the inlet of wind regime evaporimeter of the hot water heat exchanger of refrigerant loop, be also connected with the bypass hot gas line of defrosting, the bypass hot gas line of defrosting be provided with defrost valve, charging refrigerant in the loop be linked to be; When system performs defrost cycle, defrost valve is opened, and cold-producing medium hot gas directly enters wind regime evaporimeter heat release defrost by hot water heat exchanger by the bypass hot gas line of defrosting, and low temperature refrigerant gas is drawn back by compressor, hot water heat exchanger heat absorption is sent in recompression, circulating defrosting; Except frost season, the fan of wind regime evaporimeter closes.
The second, a kind of parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost, described refrigerant circuit systems also includes a cross valve, and its connected mode is: by compressor outlet and cross valve first interface, and namely cross valve air inlet connects; The coil of cross valve without during electricity with the cross valve interface be communicated with in air inlet, be designated as cross valve second interface, be connected with the refrigerant inlet of hot water heat exchanger; From the refrigerant outlet of hot water heat exchanger, the inlet of reservoir of sequentially connecting, filter, flow controller, wind regime evaporimeter; The gas outlet of wind regime evaporimeter and cross valve the 3rd interface, be connected with the cross valve interface be communicated with in air inlet when namely the coil of cross valve has an electricity; Cross valve the 4th interface, namely three interfaces one are arranged public gas outlet placed in the middle and are connected with the air inlet of gas-liquid separator; The gas outlet of gas-liquid separator is connected with the air inlet of compressor; Charging refrigerant in the loop be linked to be; When system performs defrost cycle, cross valve coil has electricity, and cross valve commutates, cold-producing medium reverse circulation, and fan closes.
The third, a kind ofly adopt bypass hot gas defrosting and with the parallel mutual defrosting air source heat pump water heater of subcooler, described refrigerant circuit systems also includes the bypass hot gas line of subcooler, defrost valve and defrosting; Its connected mode is, by the refrigerant passage of compressor, hot water heat exchanger, reservoir, subcooler, filter, flow controller, wind regime evaporimeter, gas-liquid separator, compressor sequentially series connection, forms the refrigerant loop of water heating circulation; Between the refrigerant outlet and the inlet of wind regime evaporimeter of the hot water heat exchanger of refrigerant loop, be also connected with defrosting bypass line, the bypass hot gas line of defrosting be provided with defrost valve, charging refrigerant in the loop be linked to be; When system performs defrost cycle, defrost valve is opened, and cold-producing medium directly enters wind regime evaporimeter by hot water heat exchanger by the bypass hot gas line of defrosting, and fan closes; After the water route parallel connection of the subcooler of each refrigerant circuit systems, be inserted between the import of water circulating pump of the hot water heat-exchange system of described parallel hot water Inner eycle and the water feeding one-way valve of supplementing water water inlet pipe export, form the hot water heat-exchange system of the parallel hot water Inner eycle with subcooler.
4th kind, a kind ofly reverse circulation is adopted to defrost and with the parallel mutual defrosting air source heat pump water heater of subcooler, described refrigerant circuit systems also includes subcooler and cross valve, its connected mode is: by compressor outlet and cross valve first interface, and namely cross valve air inlet connects; The coil of cross valve without during electricity with the cross valve interface be communicated with in air inlet, be designated as cross valve second interface, be connected with the refrigerant inlet of hot water heat exchanger; From the refrigerant outlet of hot water heat exchanger, the inlet of reservoir of sequentially connecting, filter, subcooler, flow controller, wind regime evaporimeter; At the gas outlet of wind regime evaporimeter and cross valve the 3rd interface, be connected with the cross valve interface be communicated with in air inlet when namely the coil of cross valve has an electricity; Cross valve the 4th interface, namely three interfaces one are arranged public gas outlet placed in the middle and are connected with the air inlet of gas-liquid separator; The gas outlet of gas-liquid separator is connected with the air inlet of compressor; Charging refrigerant in the loop be linked to be; When system performs defrost cycle, cross valve coil has electricity, and cross valve commutates, cold-producing medium reverse circulation, and fan closes; After the water route parallel connection of the subcooler of each refrigerant circuit systems, be inserted between the import of water circulating pump of the hot water heat-exchange system of described parallel hot water Inner eycle and the water feeding one-way valve of supplementing water water inlet pipe export, form the hot water heat-exchange system of the parallel hot water Inner eycle with subcooler.
5th kind, a kind of reverse circulation that adopts defrosts and adds water source heat exchangers in parallel formula mutual defrosting air source heat pump water heater, described refrigerant circuit systems also includes water source heat exchanger and cross valve, its connected mode is: by compressor outlet and cross valve first interface, and namely cross valve air inlet connects; The coil of cross valve without during electricity with the cross valve interface be communicated with in air inlet, be designated as cross valve second interface, be connected with the refrigerant inlet of hot water heat exchanger; From the refrigerant outlet of hot water heat exchanger, the inlet of reservoir of sequentially connecting, filter, flow controller, water source heat exchanger, wind regime evaporimeter; At the gas outlet of wind regime evaporimeter and cross valve the 3rd interface, be connected with the cross valve interface be communicated with in air inlet when namely the coil of cross valve has an electricity; Cross valve the 4th interface, namely three interfaces one are arranged public gas outlet placed in the middle and are connected with the air inlet of gas-liquid separator; The gas outlet of gas-liquid separator is connected with the air inlet of compressor; Charging refrigerant in the loop be linked to be; When system performs defrost cycle, cross valve coil has electricity, and cross valve commutates, cold-producing medium reverse circulation, and fan closes; The water route of the water source heat exchanger of each refrigerant circuit systems is in parallel, and its import in parallel is connected with water source water inlet pipe, water inlet pipe is provided with water source water intaking valve, and the delivery port of its parallel connection is connected with water source outlet pipe, and water source outlet pipe is provided with out water one-way valve; The bottom of water source heat exchanger is provided with discharge pipe line, and discharge pipe line has discharging valve, and its top is provided with vent valve.
Described one adopts reverse circulation defrost and add water source heat exchangers in parallel formula mutual defrosting air source heat pump water heater, there is water heating, chilled water, three kinds of functions of chilled water and hot water simultaneously, six kinds of mode can be organized to run: have three kinds of mode methods of operation to be all water heating, its refrigerant circulation flow sequence all, compressor, cross valve (1. → 2.), hot water heat exchanger, reservoir, filter, flow controller, water source heat exchanger, wind regime evaporimeter, cross valve (3. → 4.), gas-liquid separator, compressor, the first mode: the single air-source heat absorption water heating method of operation, the fan of compressor, water circulating pump, wind regime evaporimeter starts, cross valve coil without electricity, water source heat exchanger water route not water flowing, and emptied of water, the second mode: single water source heat absorption water heating method of operation, compressor, water circulating pump start, and cross valve coil is without electricity, and the fan of wind regime evaporimeter stops, water source heat exchanger water route water flowing, the third mode: simultaneously from air-source and the water source heat absorption water heating method of operation, the fan of compressor, water circulating pump, wind regime evaporimeter starts, cross valve coil without electricity, water source heat exchanger water route water flowing, 4th kind of mode: perform Defrost operation mode, the compressor, the water circulating pump that carry out the system defrosted start, and cross valve coil has electricity, the fan of wind regime evaporimeter stops, water source heat exchanger water route water flowing, do not carry out the system defrosted, still carry out the first or the third mode method of operation, 5th kind of mode: the cold water method of operation of idle call processed, compressor, cross valve coil have electricity, the fan of wind regime evaporimeter starts, and hot water heat exchanger changes the cold water exporting idle call, and the water intaking valve of hot water heat-exchange system is opened, water circulating pump starts, circulating water flow adjustable valve is closed, and the water flow manual modulation valve on manual outlet pipeline for subsequent use is all opened, and water source heat exchanger water intaking valve is opened, water source heat exchanger water route water flowing, can obtain a small amount of hot water simultaneously, 6th kind of mode: the cold water of idle call processed is held concurrently the water heating mode method of operation, compressor, water circulating pump starts, cross valve coil has electricity, the fan of wind regime evaporimeter stops, use water source heat exchanger instead and make condenser, the whole heat of condensation water heating of absorption refrigeration agent, water source heat exchanger water intaking valve is opened, heat exchanger water route, water source exports hot water, hot water heat exchanger changes the cold water exporting idle call, the water intaking valve of hot water heat-exchange system is opened, water circulating pump starts, circulating water flow adjustable valve is closed, water flow manual modulation valve on manual outlet pipeline for subsequent use is all opened, former hot water heat-exchange system exports air conditioner cold water.
Described parallel mutual defrosting air source heat pump water heater, the constant temperature water flow control valve of the hot water heat-exchange system described in it is condensing pressure Water flow adjusting valve, or the constant temperature on-off valve of temperature memory alloy temperature-sensing element; When adopting condensing pressure Water flow adjusting valve, the bellows pressure chamber of each condensing pressure Water flow adjusting valve has tube connector to connect with the compressor exhaust pipe of corresponding control flow system respectively, the corresponding relation of foundation condensation of refrigerant pressure and saturation temperature, selects the pressure corresponding with setting leaving water temperature to be controlled condition;
Described parallel mutual defrosting air source heat pump water heater, the flow controller of the refrigerant circuit systems described in it is capillary, or electric expansion valve, or heating power expansion valve;
Described parallel mutual defrosting air source heat pump water heater, the hot water heat exchanger of the hot water heat-exchange system described in it is plate type heat exchanger, or high-efficiency tank pipe heat exchanger, or coaxial sleeve pipe type heat exchanger.
In sum, main innovate point of the present invention and effect thereof be summed up as following some: (1) devises the hot water heat-exchange system of the parallel hot water Inner eycle of parallel mutual defrosting air source heat pump water heater, be characterized in: the path that the delivery port of the hot water heat exchanger of each system is connected with constant temperature outlet valve and hot water Inner eycle check valve is respective independence, does not interfere with each other; When water circulating pump stops, each check valve of circulation waterway avoids ganging up of each hot water heat exchanger water route, ensure that each refrigerant circuit systems can work alone, go out hot water separately, the condensing pressure of each system also can balance because water outlet temperature setting is identical; When certain refrigerant circuit systems stops or defrosting, the hot water heat exchanger in this loop does not produce hot water, and therefore its constant temperature outlet valve is closed, and there will not be because of cold water short circuit, affects leaving water temperature; In addition, when water circulating pump is opened, the water route mutual circulation of the hot water heat exchanger of each system is communicated with, and when in turn ensure that defrosting, heat is helped each other;
(2) devise air-duct clapboard, make the air channel of the refrigerant circuit systems of each defrosting group independently, ensure that grouping defrosting can independently normally be carried out; Because the fan carrying out the system defrosted is out of service, its wind regime evaporimeter substantially not with Cryogenic air heat exchange;
(3) formulated the program of the execution of defrosting of helping each other, ensured to help each other to defrost and sequentially carry out;
(4) refrigerant loop of the bypass hot gas defrosting being applicable to mutual defrosting air source heat pump water heater and inverse defrosting circulation is devised, the bypass hot gas line of the defrosting of its defrosting formula of helping each other is between the refrigerant outlet of the hot water heat exchanger being connected to refrigerant loop and the inlet of wind regime evaporimeter, be not as the bypass hot gas line of the defrosting of normal air source heat pump be connected to compressor outlet pipe and wind regime evaporimeter inlet between, thus ensure that the heat that can obtain defrosting from the water passage of hot water heat exchanger;
(5) devise the parallel mutual defrosting air source heat pump water heater of subcooler, winter can improve heating capacity 15%;
(6) owing to devising manual outlet pipe for subsequent use and be provided with a water flow manual modulation valve in the hot water heat-exchange system of parallel hot water Inner eycle on manual outlet pipeline for subsequent use, in water flow manual modulation valve all unlatching situations, the mutual defrosting air source heat pump water heater that inverse defrosting is circulated can become handpiece Water Chilling Units in summer;
(7) with the addition of water source heat-exchange system due in the refrigerant loop of mutual defrosting air source heat pump water heater that circulates at inverse defrosting, unit is had in the winter time simultaneously independent from air-source, separately from water source, or absorb the function of heat from air-source and water source simultaneously, can greatly increase hot water output; In summer, water source heat-exchange system again can as heat regenerator, and unit supplies air conditioner cold water and hot water simultaneously, and COP can reach more than 8; If do not need hot water, can be dispelled the heat to air by the wind regime evaporimeter transforming condenser into, make refrigerant condenses, manufactured the cold water of idle call by the hot water heat exchanger transforming evaporimeter into; There is the applicability of the cold and hot amount of the different demand of coupling.
Because parallel mutual defrosting air source heat pump water heater have employed above-mentioned multinomial innovative design, its hot water Inner eycle loop is when water circulating pump is opened, the hot water that each refrigerant circuit systems produces can be adjusted mutually, thoroughly solves directly-heated type air source hot pump water heater and to defrost an apyrogenic difficult problem; This is because, the Defrost method of existing heat pump: reverse circulation defrosting and bypass hot gas defrosting all will from hot water heat exchanger draw heats, and the hot water heat exchanger in the loop of directly-heated type list air source hot pump water heater can not find supplying heat source; Mutual defrosting air source heat pump water heater of the present invention, when adopting bypass hot gas defrosting, need not stop compressor, the flow of refrigerant direction of hot water heat exchanger and wind regime evaporimeter remains unchanged, and defrosting defrosting heat used of helping each other is the heat produced by heat pump method, not only origin of heat is sufficient, and only need the electrically heated part of consumption, and very energy-conservation, the directly heating defrosting in pipe of cold-producing medium hot gas, frost layer can be made to melt soon come off, reduce defrosting energy consumption; So Defrost technology of the present invention, there is defrosting efficiency high, the advantages such as defrosting time is short, energy-conservation; The mutual defrosting air source heat pump water heater of inverse defrosting, further provides the function of handpiece Water Chilling Units; The hot water Inner eycle technology that the present invention adopts, not only ensure that defrosting of helping each other can realize, and when not defrosting, hot water Inner eycle contributes to improving hot water heat exchanger water velocity, improves heat transfer efficiency and maintains the operating mode of condensing pressure at optimal output; The subcooler that the present invention adds, the temperature of the heat that cold-producing medium can be utilized in the winter time excessively cold heating winter low temperature water inlet, improves hot water flow about 15%; The present invention add water source heat exchangers in parallel formula help each other defrosting air source hot pump water heater, independently supply cold water and hot water with Teat pump boiler, water chiller-heater unit, supply the function of cold water and hot water simultaneously.
In a word, technical scheme of the present invention, for air source hot pump water heater solves a defrosting difficult problem, and provide multiple Multifunctional circulating system scheme make air source hot pump water heater in the winter time can normally, efficient, safety, stable operation, and the three-purpose heat pump machine of the supplying hot water of the sorrow of frostless resistance, heating, cooling can be developed into; The present invention has larger technological break-through, for air source hot pump water heater is promoted the use of, has cleared away obstacle, very with practical value and tremendous economic meaning.
Accompanying drawing explanation
Fig. 1, the embodiment of the present invention 1, a kind of formation and fundamental diagram adopting the parallel mutual defrosting air source heat pump water heater of bypass hot gas defrosting.
Fig. 2, the embodiment of the present invention 2, a kind of formation of the parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost and fundamental diagram, can be used as changes in temperature unit.
Fig. 3, the embodiment of the present invention 3, a kind ofly adopt bypass hot gas defrosting and with the formation of the parallel mutual defrosting air source heat pump water heater of subcooler and fundamental diagram, have very high efficiency winter.
Fig. 4, the embodiment of the present invention 4, a kind ofly adopt reverse circulation to defrost and with the formation of the parallel mutual defrosting air source heat pump water heater of subcooler and fundamental diagram, can be used as changes in temperature unit and use, have very high efficiency winter.
Fig. 5, the embodiment of the present invention 5, a kind of adopt reverse circulation to defrost and add water source heat exchangers in parallel formula to help each other the formation of defrost air source heat exchanger and fundamental diagram, there is independent heat absorption from air-source and water resource heat pump, simultaneously from air-source and water source heat absorption water heating, summer supplies cold water separately, supplies the function such as cold water and hot water simultaneously.
Two division board installation site, defrosting group air channel schematic diagrames of a kind of box unit of Fig. 6, parallel mutual defrosting air source heat pump water heater of the present invention.
Two division board installation site, defrosting group air channel schematic diagrames of a kind of V-type unit of Fig. 7, parallel mutual defrosting air source heat pump water heater of the present invention.
Detailed description of the invention
Further described formation and the operation principle of the air source hot pump water heater of parallel mutual of the present invention defrosting by embodiment below in conjunction with accompanying drawing.But content of the present invention is not limited only to shown in accompanying drawing.
The structural relation of embodiment 1 and operation principle are by Fig. 1 and Fig. 6 explanation.
Shown in Fig. 1, for a kind of of the embodiment of the present invention 1 adopts the refrigerant circuit systems of the parallel mutual defrosting air source heat pump water heater of bypass hot gas defrosting and the structural relation schematic diagram of hot water heat-exchange system, the parallel mutual defrosting air source heat pump water heater of embodiment 1 includes two respective independently refrigerant circuit systems, the hot water heat-exchange system of a parallel hot water Inner eycle, unified signals collecting and circuit control system, as shown in Figure 1, two refrigerant circuit systems are respectively a system and b system, and the accessory of two systems represents with footnote a and b all respectively, for a system, the formation of the refrigerant circuit systems described in explanation and connected mode: a system is by refrigerant passage, reservoir 3a, the filter Ga of compressor 1a, hot water heat exchanger 2a, flow controller Ja, wind regime evaporimeter 5a, gas-liquid separator 7a, compressor 1a are sequentially connected into refrigerant circulation loop, the bypass hot gas line of defrosting is also connected with between the refrigerant outlet and the inlet of wind regime evaporimeter 5a of hot water heat exchanger 2a, the bypass hot gas line of defrosting is provided with defrost valve SFa, charging refrigerant in the loop be linked to be, the air-duct clapboard 10 of a system and b system is arranged in the centre of the common casing of two systems, wind regime evaporimeter 5a and 5b of a system and b system, fan 6a and 6b is in the both sides of air-duct clapboard 10 respectively, referring to Fig. 6 (a) and Fig. 6 (b), two groups of refrigerant circuit systems of embodiment 1 are arranged in a box casing, the left surface of casing facade and the left back side are the wind regime evaporator coil fin 5a of a system, the right flank of casing facade and the right back side are the wind regime evaporator coil fin 5b of b system, casing front is closure panel and instrument face plate, the left side of box top and right-hand part are separately installed with fan 6a and 6b of a system and b system, placement one piece of air inlet duct dividing plate 10 is erect in the middle of casing, casing is divided into two Room, left and right, other parts of a system and b system, as compressor 1a etc., be placed on the end framed bent of indoor, left and right two of casing all respectively, the main cross-sectional schematic that the space that Fig. 6 (a) is the Teat pump boiler of embodiment 1 is arranged, Fig. 6 (b) is its top view schematic diagram.
The hot water heat-exchange system of described parallel hot water Inner eycle, as shown in Figure 1, it is formed and connected mode is: the water inlet of hot water heat exchanger 2a and 2b of a system and b system is with the water inlet main of hot water heat exchanger and connect, and the main one end that intakes is connected with the delivery port of water circulating pump 8; The water route outlet of hot water heat exchanger 2a with 2b is connected with the water inlet of two constant temperature water flow control valve ZFa with ZFb and the import of two Inner eycle water one-way valve Dsa with Dsb respectively, the delivery port of two constant temperature water flow control valves in parallel with go out hot-water supply main and be connected, the outlet parallel connection of two Inner eycle water one-way valves is connected with the main of Inner eycle water, the main of Inner eycle water is equipped with circulating water flow adjustable valve TF1, one of two parallel interfaces of the water side of the main of Inner eycle water and the water inlet of water circulating pump 8 are connected; Two of two parallel interfaces of the import of water circulating pump are connected with supplementary water inlet pipe, and supplementary water inlet pipe is provided with entering water electromagnetic valve DF and water feeding one-way valve Ds1; The main of Inner eycle water and go out between hot-water supply main to be also connected with manual outlet pipe for subsequent use, manual outlet pipeline for subsequent use is provided with a water flow manual modulation valve TF2; Form the hot water heat-exchange system of parallel hot water Inner eycle thus; Described constant temperature water flow control valve ZFa, ZFb are two condensing pressure Water flow adjusting valves, the bellows chamber of two condensing pressure Water flow adjusting valves has tube connector to connect with the compressor exhaust pipe of a system and b system respectively, represent with multiple spot line in figure, the corresponding relation of foundation condensation of refrigerant pressure and saturation temperature, select the pressure corresponding with setting leaving water temperature to be controlled condition, reach the object of constant temperature water outlet; Such as, freon R22 refrigerant saturation pressure (gauge pressure) 20kg/cm
2, corresponding saturation temperature about 50 DEG C, substantially suitable with hot water heat exchanger leaving water temperature, so alternative constant temperature water flow control valve, there is highly sensitive advantage; Water flow auxiliary hand-operating control valve just uses when condensing pressure Water flow adjusting valve is out of order, and usually closes, and defrosting is closed season especially need not.
The parallel mutual defrosting air source heat pump water heater of embodiment 1, that employing 2 refrigerant circuit systems are successively helped each other defrosting, as long as there is a refrigerant circuit systems to send defrosting signal in unit, such as the evaporating pressure of a system declines suddenly fast, and evaporating temperature exceedes setting etc. lower than environment temperature difference, first send defrosting signal, or arrive the defrosting cycle designated time, the such as frosting phase starts latter 45 minutes, source pump just enters defrosting mode, the system first sending defrosting signal by agreement starting or the system of arranging first to defrost enter defrost cycle, such as a system is first defrost system, a system just switches to defrost cycle, fan 6a stops, defrost valve SFa opens, the cold-producing medium of heat enters wind regime evaporimeter 5a through defrost bypass, release sensible heat defrost, low temperature refrigerant gas is through gas-liquid separator 7a, sucked by compressor 1 and compress, and deliver in the refrigerant passage of hot water heat exchanger 2a, absorb the heat of Qi Shui side path hot water, wind regime evaporimeter 5a is entered again through defrost bypass, circulating defrosting, due to the water passage Inner eycle of two hot water heat exchanger 2a and 2b of the hot water heat-exchange system of parallel hot water Inner eycle, b system is still carrying out water heating circulation, its liberated heat that condenses in hot water heat exchanger 2b is by hot water inner loop mode, mix with the low temperature water outlet from hot water heat exchanger 2a in the main of the Inner eycle water of the outlet of recirculated water check valve Dsb and recirculated water check valve Dsa, again through circulating water flow adjustable valve TF1 and water circulating pump 8, to the warm water that a hot water used in system heat exchanger 2a provides temperature higher, for defrosting, because the condensing pressure of a system during defrosting is lower than the pressure setting leaving water temperature, the condensing pressure Water flow adjusting valve of a system can be closed automatically, and the condensing pressure of b system still can reach the pressure of setting leaving water temperature, so the condensing pressure Water flow adjusting valve of b system still can be opened, still have hot water during defrosting and export, when a system sends defrosting end signal, such as, when wind regime evaporator outlet temperature arrives more than 10 DEG C or 10 DEG C, a system defrost cycle terminates, and the defrost valve SFa of a system closes, and fan 6a leaves, and recovers normal circulation, meanwhile, b system enters defrost cycle, and the defrost valve SFb of b system opens, and fan 6b stops, until the defrosting of b system is complete, complete machine returns to water heating heat pump cycle.
The parallel mutual defrosting air source heat pump water heater of embodiment 1, its signal system is mainly all configured with wind regime evaporator outlet temperature probe T2a and T2b two refrigeration systems, condensation of refrigerant pressure, evaporating pressure probe P1a and P1b, P2a and P2b, hot water effluent temperature T1, environment temperature probe etc.; After signal acquisition process, by control panel according to setting program, control compressor, water circulating pump, fan, magnetic valve etc. and open or stop, carry out water heating or defrosting.
The hot water heat-exchange system of the parallel hot water Inner eycle that embodiment 1 adopts, not only there is defrost function of helping each other, its hot water Inner eycle also has the dual important function improving Teat pump boiler efficiency and improve its power output, because directly-heated type Teat pump boiler is when inflow temperature is very low, extremely low by the water flow velocity of hot water heat exchanger, hot water heat exchanger average temperature is low, system high pressure is low, so overall efficiency is low, exert oneself low, and adopt hot water Inner eycle, greatly can improve the water flow velocity of hot water heat exchanger, and maintain system high pressure, reach the dual purpose raising the efficiency and improve power output, moreover, the air source hot pump water heater of parallel mutual defrosting of the present invention, can when separate unit system works alone, or during several system associated working, or water circulating pump work is not with when working, or defrosts and when not defrosting, can ensure that constant temperature goes out hot water, and system can be in optimal output, peak efficiency duty.
Structural relation and the operation principle of embodiment 2 are illustrated by Fig. 2.
As shown in Figure 2, a kind of parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost of the embodiment of the present invention 2, include two respective independently refrigerant circuit systems, a system and b system, the accessory of two systems all represents with footnote a and b; The hot water heat-exchange system of a parallel hot water Inner eycle, unified signals collecting and circuit control system; For a system, the formation of the refrigerant circuit systems described in explanation and connected mode: also include cross valve 4a; Note, the individual interface of cross valve main valve body side be cross valve first interface 1., three interfaces of the opposite side of cross valve main valve body, about fix on cross valve coil without during electricity with the interface be communicated with in first interface be cross valve second interface 2., when cross valve coil has electricity with the interface be communicated with in first interface be cross valve the 3rd interface 3., interface placed in the middle be cross valve the 4th interface 4., namely be communicated with without during electricity with in the 3rd interface at cross valve coil, again when cross valve coil has electricity with the interface be communicated with in the second interface; Cross valve first interface is generally as common inlet, and cross valve the 4th interface is generally as public outlet; Its connected mode is: be 1. connected with cross valve 4a first interface by compressor 1a gas outlet; 2. cross valve second interface is connected with the refrigerant inlet of hot water heat exchanger; From the refrigerant outlet of hot water heat exchanger 2a, sequentially series connection reservoir 3a, filter Ga, flow controller Ja, the inlet of wind regime evaporimeter 5a; 3. the gas outlet of wind regime evaporimeter 5a is connected with cross valve the 3rd interface; 4. cross valve the 4th interface is connected with the air inlet of gas-liquid separator 7a; The gas outlet of gas-liquid separator is connected with the air inlet of compressor; The loop charging refrigerant be linked to be.
The parallel mutual defrosting air source heat pump water heater of described embodiment 2, the formation of the hot water heat-exchange system of its parallel hot water Inner eycle is identical with the embodiment 1 shown in connected mode with Fig. 1.
A kind of parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost of embodiment 2, also be the method adopting 2 refrigerant circuit systems identical with embodiment 1 successively to defrost, just the execution defrost cycle of embodiment 2 adopts inverse endless form, first perform defrost cycle for a system, its defrost cycle refrigerant flow circuit is: and compressor 1a → cross valve 4a (1. → 3.) → wind regime evaporimeter 5a → flow controller Ja → filter Ga → reservoir 3a → hot water heat exchanger 2a → cross valve 4a (2. → 4.) → gas-liquid separator 7a → compressor 1a; When a system starts to defrost, fan 6a stops, and cross valve 4a coil becomes electricity, cross valve 4a switched path; B system continues water heating and runs; When a system sends defrosting end signal, such as, when wind regime evaporator outlet temperature arrives more than 10 DEG C or 10 DEG C, cross valve 4a coil reverts to without electricity, and fan 6a leaves; Meanwhile, b system enters defrost cycle, and cross valve 4b coil becomes electricity, and fan 6b stops, b system refrigerant reverse cycle defrosting, until the defrosting of b system is complete, complete machine returns to water heating heat pump cycle.
A kind of parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost of embodiment 2, has the function that will transform into summer as handpiece Water Chilling Units uses; If will transform into as handpiece Water Chilling Units uses in summer, unit will be arranged on chilled water Modality work, the cross valve coil of a system and b system is energized simultaneously, the cold-producing medium of two systems be all in defrost same stream to, wind regime evaporimeter becomes condenser, hot water heat exchanger produces cold water, and water flow manual modulation valve TF2 all opens, and cold water is exported by manual outlet pipe for subsequent use; When chilled water Modality work, the signal conductively-closed of wind regime evaporator outlet temperature probe T2a and T2b, the signal of the leaving water temperature probe T1 of former hot water heat-exchange system, becomes the detection signal of Cold water-out temperature, will report to the police or stoppage protection lower than 3 DEG C.
The parallel mutual defrosting air source heat pump water heater structural relation of embodiment 3 and operation principle are illustrated by Fig. 3.
Shown in Fig. 3 is that embodiment 3 a kind of adopts bypass hot gas defrosting and with the formation of the parallel mutual defrosting air source heat pump water heater of subcooler and fundamental diagram, there are two respective independently refrigerant circuit systems a system and b systems, the hot water heat-exchange system of a parallel hot water Inner eycle, unified signals collecting and circuit control system.
The difference of the air source hot pump water heater that the parallel mutual defrosting air source heat pump water heater of the embodiment 3 shown in Fig. 3 and the parallel mutual shown in Fig. 1 defrost, only be to the addition of subcooler 9a and 9b respectively, before or after filter can be placed on subcooler between the reservoir outlet and flow controller import of two refrigerant circuit systems; The water route import and export of two subcoolers is in parallel, is inserted between the water feeding one-way valve outlet of the supplementing water water inlet pipe of hot water heat-exchange system and the import of water circulating pump, forms the hot water heat-exchange system of the parallel hot water Inner eycle with subcooler; All the other structures are all identical with the embodiment shown in Fig. 1.
The subcooler increased of embodiment 3, has the effect well increasing heating capacity and raise the efficiency in the winter time.By the control experiment with common 10PH directly-heated type air source hot pump water heater, the temperature 2 DEG C the easiest frosting phase is run in the winter time, the Teat pump boiler of embodiments of the invention 3 is exerted oneself as 150% of common heat pump to facing the hot water before defrosting, COP improves 37.5%, and embodiments of the invention 3 are still having hot water to export except frost season.
The parallel mutual defrosting air source heat pump water heater structural relation of embodiment 4 and operation principle are illustrated by Fig. 4.
Shown in Fig. 4 is that embodiment 4 a kind of adopts reverse circulation to defrost and with the formation of the parallel mutual defrosting air source heat pump water heater of subcooler and fundamental diagram, there are two respective independently refrigerant circuit systems a system and b systems, the hot water heat-exchange system of a parallel hot water Inner eycle, unified signals collecting and circuit control system.
The parallel mutual defrosting air source heat pump water heater of the embodiment 4 shown in Fig. 4 and the employing reverse circulation shown in Fig. 2 defrost the difference of parallel mutual defrosting air source heat pump water heater, only be to the addition of subcooler 9a and 9b respectively, before or after filter can be placed on subcooler between the reservoir outlet and flow controller import of two refrigerant circuit systems; The water route import and export of two subcoolers is in parallel, is inserted between the water feeding one-way valve outlet of the supplementing water water inlet pipe of hot water heat-exchange system and the import of water circulating pump, forms the hot water heat-exchange system of the parallel hot water Inner eycle with subcooler; All the other structures are all identical with the embodiment 2 shown in Fig. 2.Subcooler effect when inflow temperature is lower is more obvious, so have obvious synergistic function winter; If summer Teat pump boiler transform into handpiece Water Chilling Units use, subcooler is equivalent to add evaporator area, also can increase cool water quantity.
The parallel mutual defrosting air source heat pump water heater structural relation of embodiment 5 and operation principle are illustrated by Fig. 5.
Shown in Fig. 5 is that embodiment 5 a kind of adopts reverse circulation to defrost and add water source heat exchangers in parallel formula and to help each other the formation of defrost air source heat exchanger and fundamental diagram, there are two respective independently refrigerant circuit systems a system and b systems, the hot water heat-exchange system of a parallel hot water Inner eycle, unified signals collecting and circuit control system.
The parallel mutual defrosting air source heat pump water heater of the embodiment 5 shown in Fig. 5 and the employing reverse circulation shown in Fig. 2 defrost the difference of parallel mutual defrosting air source heat pump water heater, are only all to increase between the flow controller and the inlet of wind regime evaporimeter of each refrigerant circuit systems have water source heat exchanger 11a and 11b; The water route of the water source heat exchanger of each refrigerant circuit systems is in parallel, and its import in parallel is connected with water source water inlet pipe, water inlet pipe is provided with water source water intaking valve F1; The delivery port of its parallel connection is connected with water source outlet pipe, water source outlet pipe is provided with out water one-way valve Ds2, the bottom of water source heat exchanger be provided with discharge pipe line, discharge pipe line there is discharging valve F2, drainpipe is arranged in the water inlet pipe bypass below water source heat exchanger, the top of water source heat exchanger is provided with vent valve F3, and vent valve F3 can be arranged in the bypass before the check valve inlet of the water source outlet pipe above water source heat exchanger.
One shown in Fig. 5 adopts reverse circulation defrost and add water source heat exchangers in parallel formula mutual defrosting air source heat pump water heater, has heat pump water heating, chilled water, three kinds of functions of the hot water that simultaneously freezes, and six kinds of mode can be organized to run; There are three kinds of mode method of operation water heatings, for a system, its refrigerant circulation flow sequence is all, compressor 1a, cross valve 4a (1. → 2.), hot water heat exchanger 2a, reservoir 3a, filter Ga, flow controller Ja, water source heat exchanger 11a, wind regime evaporimeter 5a, cross valve 4 (3. → 4.), gas-liquid separator 7a, compressor 1a; The first mode list air-source heat absorption water heating method of operation, fan 6a and 6b of compressor 1a and 1b, water circulating pump 8, wind regime evaporimeter starts, and the coil of cross valve 4a and 4b is without electricity, and entering water electromagnetic valve DF opens, the water intaking valve F1 of water source heat exchanger closes, the emptying water of water source heat exchanger; The second list water source heat absorption water heating mode method of operation, compressor, water circulating pump start, and cross valve coil is without electricity, the fan of wind regime evaporimeter stops, and entering water electromagnetic valve DF opens, and the water intaking valve F1 of water source heat exchanger opens, discharging valve F2 and vent valve F3 closes, water source heat exchanger water flowing; The third is simultaneously from air-source and the water source heat absorption water heating mode method of operation, and the fan of compressor, water circulating pump, wind regime evaporimeter starts, and cross valve coil is without electricity, and entering water electromagnetic valve DF opens, water source heat exchanger water flowing; The 4th kind of defrosting mode method of operation, the system performing defrosting is carried out: compressor, water circulating pump start, and cross valve coil has electricity, and the fan of wind regime evaporimeter stops, and entering water electromagnetic valve DF opens, water source heat exchanger water flowing; Do not perform the system of defrosting, still carry out the first or the third mode method of operation; 5th kind of chilled water mode method of operation compressor, water circulating pump start, cross valve coil has electricity, the fan of wind regime evaporimeter starts, entering water electromagnetic valve DF opens, water flow manual modulation valve TF2 all opens, cold water is exported by manual outlet pipe for subsequent use, and water source heat exchanger water flowing, can obtain a small amount of hot water simultaneously; The 6th kind of chilled water double water heating mode method of operation again, compressor, water circulating pump start, cross valve coil has electricity, the fan of wind regime evaporimeter stops, entering water electromagnetic valve DF opens, and water flow manual modulation valve TF2 all opens, and cold water is exported by manual outlet pipe for subsequent use, water source heat exchanger water flowing, can obtain a large amount of hot water and a large amount of cold water simultaneously; 4th kind to the 6th kind mode method of operation, cold-producing medium all does reverse circulation, for a system, its refrigerant circulation flow sequence is all, compressor 1a, cross valve 4a (1. → 3.), wind regime evaporimeter 5a, water source heat exchanger 11a, flow controller Ja, filter Ga, reservoir 3a, hot water heat exchanger 2a, cross valve 4 (2. → 4.), gas-liquid separator 7a, compressor 1a.
The main cross-sectional schematic that a kind of rectangle unit space that Fig. 6 (a) is parallel mutual defrosting air source heat pump water heater is arranged, Fig. 6 (b) is its top view schematic diagram, air-duct clapboard 10, casing is divided into two Room, left and right, other parts of a system and b system, the left surface of casing facade and the left back side are the wind regime evaporator coil fin 5a of a system, the right flank of casing facade and the right back side are the wind regime evaporator coil fin 5b of b system, casing front is closure panel and instrument face plate, the left side of box top and right-hand part are separately installed with fan 6a and 6b of a system and b system, other parts of a system and b system, as compressor etc., on the end framed bent being placed on two indoor about casing all respectively on 12.
Fig. 7 is the stereoscopic schematic diagram of a kind of V-type unit of parallel mutual defrosting air source heat pump water heater, the parallel mutual defrosting air source heat pump water heater of above-mentioned 5 embodiments all can be as shown in Figure 7, coil pipe finned heat exchanger 5a and 5b of the wind regime evaporimeter of two defrosting groups is arranged on the V-type groove face of air channel division board 10 both sides above unit respectively symmetrically, other parts are placed on the end framed bent of X below V-type groove, fan 6a and 6b of two systems are placed on left side and the right-hand part of the box top of air channel division board 10 both sides.
Claims (3)
1. parallel mutual defrosting air source heat pump water heater, it is characterized in that: described parallel mutual defrosting air source heat pump water heater, have two respective independently refrigerant circuit systems at least, the water route inlet parallel of the hot water heat exchanger of each refrigerant circuit systems condenser is connected with the water inlet main of hot water heat exchanger, a water route outlet point two-way for each hot water heat exchanger is connected with the water inlet of constant temperature water flow control valve and the import of Inner eycle water one-way valve respectively, the delivery port of each constant temperature water flow control valve in parallel with go out hot-water supply main and be connected, the outlet parallel connection of each Inner eycle water one-way valve is connected with the main of Inner eycle water, circulating water flow adjustable valve the main of Inner eycle water is equipped with, one of two parallel interfaces of the water side of the main of Inner eycle water and the water inlet of water circulating pump are connected, water circulating pump delivery port is connected with the water inlet main of water-to-water heat exchanger group, two of two parallel interfaces of water circulating pump import are connected with supplementary water inlet pipe, and supplementary water inlet pipe is provided with entering water electromagnetic valve and water feeding one-way valve, the main of Inner eycle water and go out between hot-water supply main to be also connected with manual outlet pipe for subsequent use, manual outlet pipeline for subsequent use is provided with a water flow manual modulation valve, form the hot water heat-exchange system of parallel hot water Inner eycle thus, each independent refrigerant circuits system of parallel mutual defrosting air source heat pump water heater divides the successively defrosting of two or more defrosting group, the air inlet duct dividing plate of the wind regime evaporimeter of the refrigerant circuit systems of different defrosting group is isolated, and the number of the refrigerant circuit systems of defrosting group simultaneously must not exceed the half of the refrigerant circuit systems sum of unit, the defrosting order of different defrosting group is undertaken by setting order or sorts by the priority sending defrosting signal, when source pump obtains the signal requiring defrosting, first defrost cycle is carried out by the refrigerant circuit systems of a certain defrosting group of agreement, other defrosting group continues water heating circulation, the system defrosted in the ban exits defrost cycle, and after recovering the circulation of normal water heating, other waits for that the system of defrosting group sequentially enters defrost cycle again, in the system defrost process of certain defrosting group, the hot water that other system produces, by the hot water Inner eycle of hot water heat-exchange system, constantly to the heat of the system conveying defrosting defrosted, defrosting is fast thoroughly, when the defrosting of complete machine each system is complete, complete machine defrost process terminates, and recovers the circulation of normal water heating, in complete machine defrost process, low or high automatically according to respective hot water heat exchanger leaving water temperature of constant temperature water flow control valve corresponding to each refrigerant circuit systems, automatic closedown or unlatching, the whole system remaining heat that defrosts also can be exported by constant temperature water flow control valve, the defrost cycle of refrigerant circuit systems, according to the constituted mode of refrigerant circuit systems, or adopts bypass hot gas to help each other Defrost mode, or adopts reverse circulation to help each other Defrost mode, bypass hot gas is helped each other Defrost mode, increase in refrigerant circuit systems and have bypass hot gas line, described bypass hot gas line is connected between the refrigerant outlet of hot water heat exchanger and the inlet of wind regime evaporimeter, and bypass hot gas line is provided with defrost valve, when defrost cycle, open defrost valve, cold-producing medium absorbs from hot water heat exchanger the heat that other system provides and removes frost, reverse circulation is helped each other Defrost mode, need to increase cross valve between the exhaust outlet of compressor in refrigerant circuit system and the refrigerant inlet of hot water heat exchanger, during cold-producing medium reverse circulation, cross valve coil has electricity from becoming without electricity, switches cross valve path direction, hot water heat exchanger in defrost cycle as evaporimeter, cold-producing medium absorbs the heat of vaporization that other system provides wherein, through compressor compression, enter wind regime evaporimeter, release heat of condensation defrosting.
2. parallel mutual defrosting air source heat pump water heater as claimed in claim 1, it is characterized in that: be a kind of parallel mutual defrosting air source heat pump water heater adopting bypass hot gas defrosting, described refrigerant circuit systems also includes the bypass hot gas line of defrost valve and defrosting; Its connected mode is, by the refrigerant passage of compressor, hot water heat exchanger, reservoir, filter, flow controller, wind regime evaporimeter, gas-liquid separator, compressor sequentially series connection, forms the refrigerant loop of water heating circulation; Between the refrigerant outlet and the inlet of wind regime evaporimeter of the hot water heat exchanger of refrigerant loop, be also connected with the bypass hot gas line of defrosting, the bypass hot gas line of defrosting be provided with defrost valve, charging refrigerant in the loop be linked to be; When system performs defrost cycle, defrost valve is opened, and cold-producing medium hot gas directly enters wind regime evaporimeter heat release defrost by hot water heat exchanger by the bypass hot gas line of defrosting, and low temperature refrigerant gas is drawn back by compressor, hot water heat exchanger heat absorption is sent in recompression, circulating defrosting; Except frost season, the fan of wind regime evaporimeter closes.
3. parallel mutual defrosting air source heat pump water heater as claimed in claim 1, it is characterized in that: be a kind of parallel mutual defrosting air source heat pump water heater adopting reverse circulation to defrost, described refrigerant circuit systems also includes a cross valve, its connected mode is: by compressor outlet and cross valve first interface, and namely cross valve air inlet connects; The coil of cross valve without during electricity with the cross valve interface be communicated with in air inlet, be designated as cross valve second interface, be connected with the refrigerant inlet of hot water heat exchanger; From the refrigerant outlet of hot water heat exchanger, the inlet of reservoir of sequentially connecting, filter, flow controller, wind regime evaporimeter; The gas outlet of wind regime evaporimeter and cross valve the 3rd interface, be connected with the cross valve interface be communicated with in air inlet when namely the coil of cross valve has an electricity; Cross valve the 4th interface, namely three interfaces one are arranged public gas outlet placed in the middle and are connected with the air inlet of gas-liquid separator; The gas outlet of gas-liquid separator is connected with the air inlet of compressor; Charging refrigerant in the loop be linked to be; When system performs defrost cycle, cross valve coil has electricity, and cross valve commutates, cold-producing medium reverse circulation, and fan closes.
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Application publication date: 20160106 |