CN104848540A - Primary heating type heat pump water heater and control method thereof - Google Patents
Primary heating type heat pump water heater and control method thereof Download PDFInfo
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Abstract
The invention relates to the fluid heater using a heat pump and a control method of the fluid heater, in particular, a primary heating type heat pump water heater with a temperature control switching function and a three-water tank double-loop circulation water heating structure. The primary heating type heat pump water heater includes a heat pump unit and three water tanks; the first water tank and the second water tank are connected with a condenser through a three-way valve and a circulating pump, so that a first heating circulating loop and a second heating circulating loop of which the switching is controlled by the three-way valve can be formed; cold water inlets of the first water tank and the second water tank are connected with a cold water incoming pipeline through a first electromagnetic valve and a second electromagnetic valve; and hot water outlets at the tops of the first water tank and the second water tank are connected with a hot water storage tank through a three-way constant temperature hot water pipe, so that a first constant temperature water outgoing channel and a second constant temperature water outgoing channel which are controlled by the first electromagnetic valve and the second electromagnetic valve can be formed. The temperature control-switched three-water tank double-loop circulation water heating structure is adopted to product hot water, and outgoing water temperature can achieve set temperature and is not affected by incoming water flow, and the stability and continuity of the heating of hot water can be ensured.
Description
Technical field
The present invention relates to the fluid heater and control method thereof that utilize heat pump, particularly relate to a kind of heating type heat pump hot water of three-tank double loop circulating hot water structure and the control method for this hot water machine that possess temperature control switching.
Background technology
The high speed of the non-renewable and global reserves of current coal, oil, natural gas etc. " the fossil class energy " reduces; bring global energy shortage; add going from bad to worse of ball ecological environment; make to preserve the ecological environment, accelerate development and utilize regenerative resource, become the urgent and difficult task of the mankind.Flourish China's economic, the hot water demand of rapid growth, the heat pump water-heating machine as energy-conserving and environment-protective have also been obtained the accreditation of country and society, and the fine market prospects of energy-conserving product, also create revolutionary alternative trend to traditional water heating equipment.In GB/T 21362-2008 " business or heat pump water-heating machine that is industrial and similar applications " standard, heat-pump hot-water product is divided into a heated type and circulating heating type two types.A heating type heat pump hot water is also referred to as directly-heated type or instant heating type heat pump hot water machine, and heating type heat pump hot water is not because cold water enters heat storage water tank and the stable advantage of hot water, market large-scale popularization on the south the Changjiang river.The basic structure of an existing heating type heat pump hot water as shown in Figure 1, comprise the source pump that compressor 1, finned heat exchanger 2, condenser 3, restricting element 5 and gas-liquid separator 6 are formed, condenser 3 is used as water fluorine heat exchanger, by the heat that finned heat exchanger 2 is drawn from air, be sent in heat storage water tank 40 by circulating pump 4, utilize the water regulating valve 30 of water fluorine heat exchanger water inlet pipe, regulate the flow of inlet water of cold water to make effluent temperature constancy.But, because the cold water of an existing heating type heat pump hot water directly enters condenser 3, the size of discharge directly affects heating capacity and the efficiency of unit, when environment temperature is lower than 0 degree, in order to ensure that the leaving water temperature of product reaches 55 degree, flow of inlet water can be very little, this causes the heat exchange effect of condenser 3 poor, the heating capacity of source pump and efficiency degradation, the phenomenon that even there will be condensation not, makes unit can not normal water heating.Because the aperture of water regulating valve is very little, be easy to be plugged, cause unit because discharge is abnormal disorderly closedown.Meanwhile, because cold water water feeding pressure often changes, also can normally heat the larger impact of generation to unit, often need to carry out buck, to meet the requirement of unit to hydraulic pressure to the hydraulic pressure of cold water water inlet.Add the setting of water regulating valve 30 and circulating pump 4, make unit cost improve on the one hand, complexity is installed; On the other hand, after breaking down in system, need to detect water regulating valve 30 and circulating pump 4, maintenance point is many, thus adds the workload of maintenance maintenance simultaneously.
Chinese invention patent " a kind of plural serial stage waterway single heating type heat pump water heating machine " (Chinese invention patent number: ZL200710143443.6, Authorization Notice No.: CN100501267C) disclose a kind of plural serial stage waterway single heating type heat pump water heating machine, be made up of at least two relatively independent heat pumps and plural serial stage water system, condensed liquid refrigerant heat regenerator is added: wherein: the water inlet of Hot water units is connected to the water inlet of this cold-producing medium heat regenerator in whole level (namely highest) heat pump, the delivery port of this cold-producing medium heat regenerator is connected to the condenser water inlet of first order heat pump, the leaving condenser water mouth of first order heat pump is connected to the condenser water inlet of second level heat pump, by that analogy, until the leaving condenser water mouth of whole level heat pump, the fluorine side-entrance of this cold-producing medium heat regenerator accesses the liquid refrigerant of the condenser discharge of whole level heat pump, and the fluorine side outlet of this cold-producing medium heat regenerator is connected to the throttling arrangement import of whole level heat pump.The program improves leaving water temperature by plural serial stage water route, but there is following several respects shortcoming: 1, when the water system of connecting is few, unit heating capacity is low, inflow temperature is low, unit will ensure that low ambient temperature produces 55 degree of hot water, and it is very little that discharge can become, and condenser heat exchange effect can be very poor, thus occur that heating capacity is poor, efficiency is low, even there will be condensation effect difference, the serious problems of unit cisco unity malfunction.2, when the part of generating units defrosting of connecting, this unit does not heat or freezes, now also to maintain leaving water temperature and reach 55 degree, then also the unit that normally heats can because flow very little go out, condensation is bad, and the heating effect of unit and efficiency can be greatly affected, when the unit number of units of defrosting is more than the unit number of units normally heated, the unit heated there will be the too high catastrophe failure of condensing pressure, and the unit of defrosting likely there will be leaving water temperature and produces the catastrophe failure freezed lower than 0 degree.3, last unit of series connection, what heat all the time is high-temperature-hot-water, operate in high load region always, the life-span of product can be subject to larger impact, and First unit operates in low load region always, the ability of product can not get good utilization, thus to cause in system unit can not balanced operation, and utilization rate of equipment and installations is low.
Chinese utility model patent " heating type heat pump water heater " (utility model patent number: ZL201420373457.2, Authorization Notice No.: CN203949362U) disclose an a kind of heating type heat pump water heater, comprising: compressor, condenser, throttling arrangement, evaporimeter, water tank, adjustment water pump and attemperating unit; The water inlet of water tank is connected with the delivery port of condenser by water inlet pipe, and delivery port is connected with the water inlet of condenser by outlet pipe; Water pump is regulated to be arranged on water inlet pipe; Attemperating unit is arranged on outlet pipe, and attemperating unit detects the temperature of water in water pipe, and controls the discharge by regulating water pump according to the temperature of water.This utility model utilizes attemperating unit to utilize adjustment water pump to control the discharge entered in condenser, although the various problems that water regulating valve brings in a heating process can be solved, also do not solve unit at all and ensureing that low ambient temperature stablizes the problem of hot water preparing.And a large amount of cold water also can be delivered in water tank when defrosting by unit, so just can not ensure the normal use of hot water.In addition, this utility model patent adopts bearing type water tank, and when hot water demand's amount is larger, the cost of bearing type water tank can be very high, and this will inevitably improve initial investment expense greatly.
Summary of the invention
The object of the invention is to provide an a kind of heating type heat pump hot water, can ensure that leaving water temperature reaches design temperature and is not subject to the impact of flow of inlet water, while the stability ensureing heat hot water and continuation, solve the easy blocking that existing water regulating valve brings in a heating process, the technical problem that fault rate is high.
The present invention solves the problems of the technologies described above adopted technical scheme:
An a kind of heating type heat pump hot water, comprise the source pump that compressor, finned heat exchanger, condenser, restricting element and gas-liquid separator connect to form, the circulating pump be communicated with the water route of condenser and heat storage water tank, and the control device controlling heat pump water-heating machine operation, is characterized in that:
Described heat storage water tank is connected to the first cyclic water tank and the second cyclic water tank by a triplet constant temperature hot-water line, and by the connection control of the first magnetic valve, the second magnetic valve and triple valve, form the three-tank double loop circulating hot water structure of temperature control switching according to following connected mode:
The circulation water inlet at the first cyclic water tank and the second cyclic water tank top is parallel-connected to the delivery port of condenser; Circulating outlet bottom first cyclic water tank and the second cyclic water tank is connected respectively to b mouth and the c mouth of triple valve, the a mouth of triple valve is connected to the water inlet of condenser by circulating pump, form the first heat cycles loop and the second heat cycles loop that triple valve controls switching, wherein:
First heat cycles loop: condenser-> first cyclic water tank-> triple valve b mouth-> triple valve a mouth-> circulating pump-> condenser;
Second heat cycles loop: condenser-> second cyclic water tank-> triple valve c mouth-> triple valve a mouth-> circulating pump-> condenser;
Cooling water inlet bottom first cyclic water tank and the second cyclic water tank, respectively by the first magnetic valve and the second magnetic valve, is connected to cold water inlet road; The hot water outlet at the first cyclic water tank and the second cyclic water tank top, is connected to heat storage water tank by triplet constant temperature hot-water line, forms the first constant-temperature effluent passage and the second constant-temperature effluent passage of the first magnetic valve and the second solenoid control, wherein:
First constant-temperature effluent passage: cold water water inlet-> first magnetic valve-> first cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
Second constant-temperature effluent passage: cold water water inlet-> second magnetic valve-> second cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
A described heating type heat pump hot water performs following steps by circulation and produces constant-temperature hot water continuously:
S1: when the water in the first cyclic water tank is after the first heat cycles loop heating to set water temperature, described control device is by controlling the conducting state of triple valve, circulating water flow is switched to the second heat cycles loop, open the first magnetic valve simultaneously, by the hot water in the first cyclic water tank, be transported in heat storage water tank by the first constant-temperature effluent passage;
S2: when the water in the second cyclic water tank is after the second heat cycles loop heating to set water temperature, described control device is by controlling the conducting state of triple valve, circulating water flow is switched to the first heat cycles loop, open the second magnetic valve simultaneously, by the hot water in the second cyclic water tank, be transported in heat storage water tank by the second constant-temperature effluent passage;
S3: when the leaving water temperature flowing through triplet constant temperature hot-water line is lower than set water temperature, described control device controls to cut out the first magnetic valve or the second magnetic valve that are in open mode, stop the water not reaching set water temperature to flow into heat storage water tank, thus ensure that the water temperature of heat storage water tank keeps constant.
The one preferably technical scheme of a heating type heat pump hot water of the present invention, is characterized in that the bottom at the first cyclic water tank and the second cyclic water tank, arranges the first cooling-water temperature sensor and the second cooling-water temperature sensor respectively; At the exit passageway of triplet constant temperature hot-water line, set out water temperature sensor, liquid level sensor is set in the inside of heat storage water tank; Described control device is connected to liquid level sensor, according to starting or stoping of the Liquid level source pump of heat storage water tank; Described control device is connected to the first cooling-water temperature sensor, the second cooling-water temperature sensor and leaving water temperature sensors, control the first magnetic valve, the second magnetic valve and triple valve according to the gentle leaving water temperature of Water in Water Tank, realize the three-tank double loop circulating hot water structure that temperature control switches.
The better technical scheme of one of a heating type heat pump hot water of the present invention, it is characterized in that the circulating water flow G=Q/ (Δ T*1.163) of the three-tank double loop circulating hot water structure that described temperature control switches, wherein, G is circulating water flow, Q is the nominal heating capacity of source pump, Δ T is the Inlet and outlet water temperature difference of condenser, and value is 5 DEG C; The hydraulic pressure of cold water water inlet should be able to ensure the hot water produced in the first cyclic water tank and the second cyclic water tank to push in heat storage water tank, and flow of inlet water should be able to meet the requirement of hot water without interruption.
The technical scheme of a kind of improvement of a heating type heat pump hot water of the present invention, it is characterized in that the first described cyclic water tank and the second cyclic water tank are two water tanks with capacity, the capacity of each cyclic water tank is that under nominal condition, unit hour heats 1/4 ~ 1/8 of the water yield; The capacity of heat storage water tank is greater than the difference that unit hour under unit hour peak heat water demand and nominal condition heats the water yield.
Another object of the present invention to provide a kind of for an above-mentioned heating type heat pump hot water control method.The present invention solves the problems of the technologies described above adopted technical scheme:
For a heating type heat pump hot water control method of an above-mentioned heating type heat pump hot water, it is characterized in that comprising the following steps:
S100: obtain water temperature setting value, water level higher limit and water level lower limit;
S200: detect heat storage water tank liquid level;
S220: if heat storage water tank liquid level >=water level lower limit, close first and second magnetic valve, source pump is shut down, and returns step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level < water level lower limit, source pump starts, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: detect the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S320: if leaving water temperature < set water temperature, the first magnetic valve and the second closed electromagnetic valve, stop cold water water inlet;
S340: if the first water tank water temperature > set water temperature, triple valve switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature > set water temperature, triple valve switches to a-b mouth connected state, the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
The invention has the beneficial effects as follows:
1, a heating type heat pump hot water of the present invention and control method thereof, adopt the three-tank double loop circulating hot water structure hot water preparing that temperature control switches, can ensure that leaving water temperature reaches design temperature and is not subject to the impact of flow of inlet water, meet the requirement of a heated type hot water machine standard, ensure stability and the continuation of heat hot water.
2, a heating type heat pump hot water of the present invention and control method thereof, heat pump cycle flow heated water, without heat storage water tank, does not affect leaving water temperature during defrosting, and defrosting effect is good, and defrosting time shortens more than 50% than an existing heating type heat pump hot water.
3, a heating type heat pump hot water of the present invention and control method thereof, eliminate the water regulating valve of prior art for constant leaving water temperature, and the heat exchange effect of condenser improves, and fault rate reduces, and system stability, structure are simple, and promotion is strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of an existing heating type heat pump hot water;
Fig. 2 is the structural representation of a heating type heat pump hot water of the present invention;
Fig. 3 is the schematic diagram of the control device of a heating type heat pump hot water of the present invention;
Fig. 4 is a heating type heat pump hot water control method flow chart of the present invention.
The label of each parts in above figure: 1-compressor, 2-finned heat exchanger, 20-blower fan, 3-condenser, 30-water regulating valve, 31-first magnetic valve, 32-second magnetic valve, 33-triple valve, 4-circulating pump, 40-heat storage water tank, 41-first cyclic water tank, 42-second cyclic water tank, 43-triplet constant temperature hot-water line, 5-restricting element, 51-fluid reservoir, 52-filter, 6-gas-liquid separator, 7-cross valve, 8-control device, 80-liquid level sensor, 81-first cooling-water temperature sensor, 82-second cooling-water temperature sensor, 83-leaving water temperature sensors, 84-environment temperature sensor, 85-fin temperature sensor, 800-operating parameter setting module, 810-water yield detection control module, 820-water temperature detection control module, 830-heat pump controller, 840-electromagnetic valve driver, 850-defrost control module.
Detailed description of the invention
In order to technique scheme of the present invention can be understood better, describe in detail further below in conjunction with drawings and Examples.Fig. 2 is an embodiment of a heating type heat pump hot water of the present invention, comprise the source pump that compressor 1, finned heat exchanger 2, condenser 3, restricting element 5 and gas-liquid separator 6 connect to form, the circulating pump 4 be communicated with the water route of condenser 3 and heat storage water tank 40, and the control device 8 controlling heat pump water-heating machine operation;
As shown in Figure 2, described heat storage water tank 40 is connected to the first cyclic water tank 41 and the second cyclic water tank 42 by a triplet constant temperature hot-water line 43, and pass through the connection control of the first magnetic valve 31, second magnetic valve 32 and triple valve 33, form the three-tank double loop circulating hot water structure of temperature control switching according to following connected mode:
The circulation water inlet at the first cyclic water tank 41 and the second cyclic water tank 42 top is parallel-connected to the delivery port of condenser 3; Circulating outlet bottom first cyclic water tank 41 and the second cyclic water tank 42 is connected respectively to b mouth and the c mouth of triple valve 33, the a mouth of triple valve 33 is connected to the water inlet of condenser 3 by circulating pump 4, form the first heat cycles loop and the second heat cycles loop that triple valve 33 controls switching, wherein:
First heat cycles loop: condenser-> first cyclic water tank-> triple valve b mouth-> triple valve a mouth-> circulating pump-> condenser;
Second heat cycles loop: condenser-> second cyclic water tank-> triple valve c mouth-> triple valve a mouth-> circulating pump-> condenser;
Cooling water inlet bottom first cyclic water tank 41 and the second cyclic water tank 42, respectively by the first magnetic valve 31 and the second magnetic valve 32, is connected to cold water inlet road; The hot water outlet at the first cyclic water tank 41 and the second cyclic water tank 42 top, is connected to heat storage water tank 40 by triplet constant temperature hot-water line 43, forms the first constant-temperature effluent passage and the second constant-temperature effluent passage of the first magnetic valve 31 and the control of the second magnetic valve 32, wherein:
First constant-temperature effluent passage: cold water water inlet-> first magnetic valve-> first cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
Second constant-temperature effluent passage: cold water water inlet-> second magnetic valve-> second cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
A described heating type heat pump hot water performs following steps by circulation and produces constant-temperature hot water continuously:
S1: when the water of the first cyclic water tank 41 li is after the first heat cycles loop heating to set water temperature Tsd, described control device 8 is by controlling the conducting state of triple valve 33, circulating water flow is switched to the second heat cycles loop, open the first magnetic valve 31 simultaneously, by the hot water in the first cyclic water tank 41, be transported in heat storage water tank 40 by the first constant-temperature effluent passage;
S2: when the water of the second cyclic water tank 42 li is after the second heat cycles loop heating to set water temperature Tsd, described control device 8 is by controlling the conducting state of triple valve 33, circulating water flow is switched to the first heat cycles loop, open the second magnetic valve 32 simultaneously, by the hot water in the second cyclic water tank 42, be transported in heat storage water tank 40 by the second constant-temperature effluent passage;
S3: when the leaving water temperature Tcs flowing through triplet constant temperature hot-water line 43 is lower than set water temperature Tsd, described control device 8 controls to cut out the first magnetic valve 31 or the second magnetic valve 32 being in open mode, stop the water not reaching set water temperature Tsd to flow into heat storage water tank 40, thus ensure that the water temperature of heat storage water tank 40 keeps constant.
In the embodiment of the heating type heat pump hot water of the present invention shown in Fig. 2, in the bottom of the first cyclic water tank 41 and the second cyclic water tank 42, the first cooling-water temperature sensor 81 and the second cooling-water temperature sensor 82 is set respectively; At the exit passageway of triplet constant temperature hot-water line 43, set out water temperature sensor 83, liquid level sensor 80 is set in the inside of heat storage water tank 40; Described control device 8 is connected to liquid level sensor 80, and the liquid level Wyw according to heat storage water tank 40 controls starting or stoping of source pump; Described control device 8 is connected to the first cooling-water temperature sensor 81, second cooling-water temperature sensor 82 and leaving water temperature sensors 83, control the first magnetic valve 31, second magnetic valve 32 and triple valve 33 according to the gentle leaving water temperature of Water in Water Tank, realize the three-tank double loop circulating hot water structure that temperature control switches.
According to an embodiment of a heating type heat pump hot water of the present invention, the circulating water flow G=Q/ (Δ T*1.163) of the three-tank double loop circulating hot water structure that described temperature control switches, wherein, G is circulating water flow, Q is the nominal heating capacity of source pump, Δ T is the Inlet and outlet water temperature difference of condenser, and value is 5 DEG C; The hydraulic pressure of cold water water inlet should be able to ensure the hot water produced in the first cyclic water tank 41 and the second cyclic water tank 42 to push in heat storage water tank 40, and flow of inlet water should be able to meet the requirement of hot water without interruption.Because heat storage water tank 40 is upper water intake mode, hot water water supply pressure does not affect by water feeding pressure, and three water tanks can be pressure-bearing type, also can be non-pressure type.
According to an embodiment of a heating type heat pump hot water of the present invention, first cyclic water tank 41 and the second cyclic water tank 42 are two water tanks with capacity, its capacity is per hourly under nominal condition heat 1/4 ~ 1/8 of the water yield, in the present embodiment, the capacity of the first cyclic water tank 41 and the second cyclic water tank 42 is per hourly under nominal condition heat 1/6 of the water yield; The capacity of heat storage water tank 40 is greater than the difference that unit hour under unit hour peak heat water demand and nominal condition heats the water yield, to ensure can provide enough hot water continuously in the water use peak period.
In the embodiment of the heating type heat pump hot water of the present invention shown in Fig. 2, described restricting element 5 is electric expansion valves, from the on high-tension side cold-producing medium of compressor 1, the low-pressure side of compressor 1 got back to by the refrigerant line of the condenser 3 passed through successively, fluid reservoir 51, filter 52 and gas-liquid separator 6, forms refrigerant circulation loop; Described control device 8 regulates the internal circulating load of cold-producing medium by the aperture controlling electric expansion valve.
An embodiment of the control device 8 of a heating type heat pump hot water of the present invention as shown in Figure 3, comprises operating parameter setting module 800, water yield detection control module 810, water temperature detection control module 820, heat pump controller 830 and electromagnetic valve driver 840;
Described operating parameter setting module 800 is connected to water yield detection control module 810 and water temperature detection control module 820;
Liquid level sensor 80 is connected to the input of water yield detection control module 810, the output of water yield detection control module 810 is connected to the input of heat pump controller 830, and the output of heat pump controller 830 is connected to the motor of compressor 1, finned heat exchanger blower fan 20 and circulating pump 4; Water yield detection control module 810 is also connected to electromagnetic valve driver 840 by heat pump controller 830;
First cooling-water temperature sensor 81, second cooling-water temperature sensor 82 and leaving water temperature sensors 83 are connected to the input of water temperature detection control module 820; The output of water temperature detection control module 820, by electromagnetic valve driver 840, is connected to the drive coil of the first magnetic valve 31, second magnetic valve 32 and triple valve 33;
Described water yield detection control module 810 detects the liquid level Wyw of heat storage water tank 40, when liquid level Wyw is lower than water level lower limit Wxx, controls source pump and starts, hot water preparing from the first heat cycles loop; When liquid level Wyw arrives water level higher limit Wsx, it is out of service that described water yield detection control module 810 controls source pump, closes the first magnetic valve 31 and the second magnetic valve 32 simultaneously, stops water inlet;
Water temperature detection control module 820 detects the first water tank water temperature Ts1, the leaving water temperature Tcs of the second water tank water temperature Ts2 and triplet constant temperature hot-water line;
When the first water tank water temperature Ts1 reaches set water temperature Tsd, triple valve 33 switches to a-c mouth connected state from a-b mouth connected state, enters the second heat cycles loop running status; Meanwhile, the first magnetic valve 31 is opened, and utilizes cold water intake pressure and hot and cold water temperature difference gravity, will complete the constant-temperature hot water of heating in the first cyclic water tank 41, in top to heat storage water tank 40;
When the second water tank water temperature Ts2 reaches set water temperature Tsd, triple valve 33 switches to a-b mouth connected state from a-c mouth connected state, returns the first heat cycles loop running status; Meanwhile, the second magnetic valve 32 is opened, and utilizes cold water intake pressure and hot and cold water temperature difference gravity, will complete the constant-temperature hot water of heating in the second cyclic water tank 42, in top to heat storage water tank 40;
When entering the first cyclic water tank 41 or the second cyclic water tank 42 cold water makes leaving water temperature Tcs lower than set water temperature Tsd, water temperature detection control module 820 controls the first magnetic valve 31 and the second magnetic valve 32 cuts out, and stops cold water water inlet.
In the embodiment of the control device 8 of the heating type heat pump hot water of the present invention shown in Fig. 3, described control device 8 also comprises defrost control module 850, described source pump also comprises the cross valve 7 being connected to refrigerant circulation loop, described defrost control module 850 obtains environment temperature by environment temperature sensor 84, fin temperature is obtained by the fin temperature sensor 85 be arranged on finned heat exchanger 2, environmentally temperature and fin temperature judge the frosting state of finned heat exchanger 2, the flow direction that cross valve 7 changes cold-producing medium is controlled by heat pump controller 830, perform defrost operation.Because the circulating water flow of source pump is not directly through heat storage water tank 40, the cold water produced during defrosting can not affect leaving water temperature, still can ensure the supply of continuous print hot water during defrosting.
Fig. 4 is the flow chart of an embodiment of a heating type heat pump hot water control method of the present invention, comprises the following steps:
S100: operating parameter setting module obtains water temperature setting value Tsd, water level higher limit Wsx and water level lower limit Wxx;
S200: water yield detection control module detects heat storage water tank liquid level Wyw;
S220: if heat storage water tank liquid level Wyw >=water level lower limit Wsx, close first and second magnetic valve, source pump is shut down, and compressor, blower fan and circulating pump are out of service, return step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level Wyw < water level lower limit Wxx, source pump starts, and compressor, blower fan and circulating pump bring into operation, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: water temperature detection control module detects the first water tank water temperature Ts1, the leaving water temperature Tcs of the second water tank water temperature Ts2 and triplet constant temperature hot-water line;
S320: if leaving water temperature Tcs < set water temperature Tsd, water temperature detection control module closes the first magnetic valve and the second magnetic valve, stops cold water water inlet; According to a preferred embodiment of a heating type heat pump hot water control method of the present invention, in order to improve temperature controlled stability, control device 8 cuts out the first magnetic valve and the second magnetic valve when lower than set water temperature Tsd 1 DEG C of leaving water temperature Tcs.
S340: if the first water tank water temperature Tc1 > set water temperature Tsd, water temperature detection control module controls triple valve and switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature Tc2 > set water temperature Tsd, water temperature detection control module controls triple valve and switches to a-b mouth connected state, and the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
Those of ordinary skill in the art will be appreciated that; above embodiment is only used to technical scheme of the present invention is described; and be not used as limitation of the invention; any the above embodiment is done based on connotation of the present invention change, modification, all will drop in the protection domain of claim of the present invention.
Claims (5)
1. an once heating type heat pump hot water, comprise the source pump that compressor, finned heat exchanger, condenser, restricting element and gas-liquid separator connect to form, the circulating pump be communicated with the water route of condenser and heat storage water tank, and control the control device of heat pump water-heating machine operation, it is characterized in that:
Described heat storage water tank is connected to the first cyclic water tank and the second cyclic water tank by a triplet constant temperature hot-water line, and by the connection control of the first magnetic valve, the second magnetic valve and triple valve, form the three-tank double loop circulating hot water structure of temperature control switching according to following connected mode:
The circulation water inlet at the first cyclic water tank and the second cyclic water tank top is parallel-connected to the delivery port of condenser; Circulating outlet bottom first cyclic water tank and the second cyclic water tank is connected respectively to b mouth and the c mouth of triple valve, the a mouth of triple valve is connected to the water inlet of condenser by circulating pump, form the first heat cycles loop and the second heat cycles loop that triple valve controls switching, wherein:
First heat cycles loop: condenser-> first cyclic water tank-> triple valve b mouth-> triple valve a mouth-> circulating pump-> condenser;
Second heat cycles loop: condenser-> second cyclic water tank-> triple valve c mouth-> triple valve a mouth-> circulating pump-> condenser;
Cooling water inlet bottom first cyclic water tank and the second cyclic water tank, respectively by the first magnetic valve and the second magnetic valve, is connected to cold water inlet road; The hot water outlet at the first cyclic water tank and the second cyclic water tank top, is connected to heat storage water tank by triplet constant temperature hot-water line, forms the first constant-temperature effluent passage and the second constant-temperature effluent passage of the first magnetic valve and the second solenoid control, wherein:
First constant-temperature effluent passage: cold water water inlet-> first magnetic valve-> first cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
Second constant-temperature effluent passage: cold water water inlet-> second magnetic valve-> second cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
A described heating type heat pump hot water performs following steps by circulation and produces constant-temperature hot water continuously:
S1: when the water in the first cyclic water tank is after the first heat cycles loop heating to set water temperature, described control device is by controlling the conducting state of triple valve, circulating water flow is switched to the second heat cycles loop, open the first magnetic valve simultaneously, by the hot water in the first cyclic water tank, be transported in heat storage water tank by the first constant-temperature effluent passage;
S2: when the water in the second cyclic water tank is after the second heat cycles loop heating to set water temperature, described control device is by controlling the conducting state of triple valve, circulating water flow is switched to the first heat cycles loop, open the second magnetic valve simultaneously, by the hot water in the second cyclic water tank, be transported in heat storage water tank by the second constant-temperature effluent passage;
S3: when the leaving water temperature flowing through triplet constant temperature hot-water line is lower than set water temperature, described control device controls to cut out the first magnetic valve or the second magnetic valve that are in open mode, stop the water not reaching set water temperature to flow into heat storage water tank, thus ensure that the water temperature of heat storage water tank keeps constant.
2. a heating type heat pump hot water according to claim 1, is characterized in that the bottom at the first cyclic water tank and the second cyclic water tank, arranges the first cooling-water temperature sensor and the second cooling-water temperature sensor respectively; At the exit passageway of triplet constant temperature hot-water line, set out water temperature sensor, liquid level sensor is set in the inside of heat storage water tank; Described control device is connected to liquid level sensor, according to starting or stoping of the Liquid level source pump of heat storage water tank; Described control device is connected to the first cooling-water temperature sensor, the second cooling-water temperature sensor and leaving water temperature sensors, control the first magnetic valve, the second magnetic valve and triple valve according to the gentle leaving water temperature of Water in Water Tank, realize the three-tank double loop circulating hot water structure that temperature control switches.
3. a heating type heat pump hot water according to claim 1 and 2, it is characterized in that the circulating water flow G=Q/ (Δ T*1.163) of the three-tank double loop circulating hot water structure that described temperature control switches, wherein, G is circulating water flow, Q is the nominal heating capacity of source pump, Δ T is the Inlet and outlet water temperature difference of condenser, and value is 5 DEG C; The hydraulic pressure of cold water water inlet should be able to ensure the hot water produced in the first cyclic water tank and the second cyclic water tank to push in heat storage water tank, and flow of inlet water should be able to meet the requirement of hot water without interruption.
4. a heating type heat pump hot water according to claim 1 and 2, it is characterized in that the first described cyclic water tank and the second cyclic water tank are two water tanks with capacity, the capacity of each cyclic water tank is that under nominal condition, unit hour heats 1/4 ~ 1/8 of the water yield; The capacity of heat storage water tank is greater than the difference that unit hour under unit hour peak heat water demand and nominal condition heats the water yield.
5., for a heating type heat pump hot water control method of time heating type heat pump hot water of described in claim 1 or 2, it is characterized in that comprising the following steps:
S100: obtain water temperature setting value, water level higher limit and water level lower limit;
S200: detect heat storage water tank liquid level;
S220: if heat storage water tank liquid level >=water level lower limit, close first and second magnetic valve, source pump is shut down, and returns step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level < water level lower limit, source pump starts, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: detect the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S320: if leaving water temperature < set water temperature, the first magnetic valve and the second closed electromagnetic valve, stop cold water water inlet;
S340: if the first water tank water temperature > set water temperature, triple valve switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature > set water temperature, triple valve switches to a-b mouth connected state, the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
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| CN107687707A (en) * | 2017-11-24 | 2018-02-13 | 戴曜 | A kind of hot-water heating system and its control method using air-source |
| CN107687707B (en) * | 2017-11-24 | 2023-07-21 | 合肥荣事达太阳能有限公司 | Water heating system adopting air source and control method thereof |
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| CN109237781A (en) * | 2018-09-19 | 2019-01-18 | 珠海格力电器股份有限公司 | Water heater, heat pump system and control method of water heater |
| CN110579405A (en) * | 2019-08-29 | 2019-12-17 | 中广核核电运营有限公司 | Auxiliary water supply system of nuclear power station and heating method thereof |
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Application publication date: 20150819 |