CN203310109U - Constant-temperature flow adjustment device for double-system primary-heating water heating unit - Google Patents
Constant-temperature flow adjustment device for double-system primary-heating water heating unit Download PDFInfo
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- CN203310109U CN203310109U CN2013203464282U CN201320346428U CN203310109U CN 203310109 U CN203310109 U CN 203310109U CN 2013203464282 U CN2013203464282 U CN 2013203464282U CN 201320346428 U CN201320346428 U CN 201320346428U CN 203310109 U CN203310109 U CN 203310109U
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Abstract
The utility model provides a constant-temperature flow adjustment device for a double-system primary-heating water heating unit, relates to a control device used in a fluid heater by utilizing a heat pump, and in particular relates to a constant-temperature flow adjustment device used for a double-system primary-heating heat pump water heating unit. The device comprises a singlechip control unit, a temperature sensing element, a switching signal element and a control signal output drive unit, wherein the singlechip control unit is connected to a compressor, a water inlet electromagnetic valve, a constant-temperature flow valve, a bypass valve and a constant-temperature water pump of the double-system primary-heating heat pump water heating unit through the control signal output drive unit, the opening degree of the constant-temperature flow valve is controlled according to an effluent temperature detected value by taking the effluent temperature setting value as a target value, so that the water flow is adjusted; when the temperature of the water tank is low, the unit runs at a constant temperature; when the water intake temperature is over high, the bypass valve is switched on; when one system in the double systems fails and stops running, the effluent setting temperature is reduced, so that the condition that the other system without failure can effectively run safely and stably can be guaranteed.
Description
Technical field
The utility model relates to a kind of control device be used to the fluid heater that utilizes heat pump, relates in particular to a kind of constant temperature flow regulator for a heating type heat pump hot water group of dual system.
Background technology
The high speed of the non-renewable and global reserves of " the fossil class energy " such as current coal, oil, natural gases reduces; brought global energy shortage; add going from bad to worse of ball ecological environment; make preserve the ecological environment, accelerate development and utilize regenerative resource, become the urgent and difficult task of the mankind.Air-source heat pump hot water as energy-conserving and environment-protective has also obtained extensive approval, and the fine market prospects of energy-conserving product have also produced revolutionary alternative trend to traditional water heating equipment.The air source heat pump hot water product mainly contains heated type, circulating heating type, static heated type, heating type heat pump hot water because install simple, the little engineering cost of engineering water pipeline caliber is low, cold water does not advance heat storage water tank and hot water is stable etc., and plurality of advantages is able to large-scale popularization.Chinese invention patent " a kind of plural serial stage waterway single heating type heat pump water heating machine " (Chinese invention patent ZL 200710143443.6, Granted publication CN 100501267C) a kind of plural serial stage waterway single heating type heat pump water heating machine is disclosed, by at least two relatively independent heat pumps and plural serial stage water system, formed, add condensed fluid cold-producing medium heat regenerator in whole level (namely highest) heat pump; Wherein: the water inlet of Hot water units is connected to the water inlet of this cold-producing medium heat regenerator, the delivery port of this cold-producing medium heat regenerator is connected to the condenser water inlet of first order heat pump, the condenser delivery port of first order heat pump is connected to the condenser water inlet of second level heat pump, by that analogy, until the condenser delivery port of whole level heat pump; The fluorine side-entrance access of this cold-producing medium heat regenerator is the liquid refrigerant of the condenser discharge of level heat pump eventually, and the fluorine side outlet of this cold-producing medium heat regenerator is connected to the throttling arrangement import of level heat pump eventually.Chinese invention patent " heating type heat pump hot water of a kind of proportional regulation type " (Chinese invention patent ZL201110096160.7, publication number CN102162681A) heating type heat pump hot water of a kind of proportional regulation type is disclosed, heat storage water tank is connected with Double-system condenser by pipeline, Double-system condenser is provided with two cover heatings, be respectively heating one and heating two, the top outlet of heating one is connected by two-way electromagnetic valve with the lower part outlet of heating two, the lower part outlet of heating one is connected with the top outlet of heating two, the top outlet of heating two forms a loop by the lower part outlet of three-way magnetic valve and heating two, heat storage water tank is provided with a water intaking valve, and water intaking valve is connected with heat storage water tank by threeway ratio temperature control valve (TCV), is provided with water pump between threeway ratio temperature control valve (TCV) and three-way magnetic valve.This utility model is by the environment-identification temperature, and the water system water route and connect the serial connection form that changes into, the discharge of two heatings doubles, and increases condensation effect, improves heating capacity and the efficiency of product, simultaneously unit can stablize again, the operation of safety.
But under numerous influence factors such as a refrigeration system damage or one of them leaving water temperature damage, the control logic of existing system exists and is difficult to realize long-term safety, stable, the efficient problem of moving in start, defrost, low ambient temperature, dual system.
The utility model content
The purpose of this utility model is that a kind of constant temperature flow regulator for a heating type heat pump hot water group of dual system will be provided, and solves that unit is efficient under various operating modes, the problem of safety, stable operation.
The utility model solves the problems of the technologies described above the technical scheme adopted:
Heating type heat pump hot water group constant temperature flow regulator of a kind of dual system, a described heating type heat pump hot water group is heat pump A, heat pump B and the heating type heat pump hot water group of dual system formed for water heating system; Described constant temperature flow regulator comprises the Single-chip Controlling unit, one group of temperature-sensing element, and one group of switching signal element and control signal output driver element is characterized in that:
Described temperature-sensing element comprises exhaust gas temperature sensor, be used to obtaining the delivery temperature Tp of compressor; The water tank temperature sensor, be used to obtaining water tank temperature Ts; The leaving water temperature sensor, be used to obtaining the leaving water temperature Tw of double-tube heat exchanger; The fin temperature sensor, be used to obtaining the fin temperature T c of finned heat exchanger, and environment temperature sensor, be used to obtaining environment temperature Th;
Described switching signal element comprises the cistern water level switch for detection of heat storage water tank water level upper and lower bound;
Described Single-chip Controlling unit, by described control signal output driver element, is connected to the compressor of a heating type heat pump hot water group of dual system, entering water electromagnetic valve, constant temperature flow valve, by-passing valve and constant temperature water pump;
Described Single-chip Controlling unit comprises:
The temperature signal collection processing module, for gathering source pump and environment temperature by described temperature-sensing element;
The switching signal acquisition processing module, for gathering the on-off state signal of described source pump by described switching signal element;
Entering water electromagnetic valve control module and source pump control module, be connected to the output of described switching signal acquisition processing module, according to heat storage water tank water level upper and lower bound signal, according to the startup sequential requirement of source pump, produce the control signal of entering water electromagnetic valve and compressor;
Constant temperature flow valve aperture setting module and constant temperature flow valve pid stream amount adjustment module, be connected to the output of described temperature signal collection processing module, according to delivery temperature Tp, leaving water temperature Tw and water outlet temperature setting value Tws, calculate constant temperature flow valve aperture setting value, and produce constant temperature flow valve aperture control signal;
The thermostatic pump control module, be connected to the output of described temperature signal collection processing module, according to water tank temperature Ts and water outlet temperature setting value Tws, produces the control signal of constant temperature water pump;
Bypass valve control module, be connected to the output of described temperature signal collection processing module, according to leaving water temperature Tw, produces the control signal of by-passing valve.
A kind of preferably technical scheme of a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, it is characterized in that described switching signal element also comprises low tension switch, high-voltage switch gear, hydraulic pressure switch, pressure differential detection valve, and heat pump A fault-signal and heat pump B fault-signal; Described Single-chip Controlling unit is by described switching signal acquisition processing module, gather each on-off state signal of described switching signal element, the running status of judgement heat pump A and heat pump B, produce dual system resultant fault signal, send described constant temperature flow valve aperture setting module to.
A kind of better technical scheme of a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, it is characterized in that, on the finned heat exchanger of described heat pump A in a heating type heat pump hot water group of dual system and heat pump B, two fin temperature sensors are set respectively; Described Single-chip Controlling unit also comprises the defrosting control module; Described temperature signal collection processing module is obtained the detected temperatures of two fin temperature sensors, usings its mean value as fin temperature T c; If when open circuit or short trouble appear in a fin temperature sensor, use the temperature of another fin temperature sensor detection as fin temperature T c; Described defrosting control module is connected to the output of described temperature signal collection processing module, according to environment temperature Th, water tank temperature Ts and fin temperature T c, sequential according to defrost requires to produce the defrosting control signal, via described control signal output driver element, be connected to the cross valve of heat-pump hot-water unit, control the source pump startup or exit the defrost running status.
A kind of improved technical scheme of a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, it is characterized in that described Single-chip Controlling unit and control signal output driver element are assembled in the housing of control device, form independently heating type heat pump hot water group constant temperature flow regulator of dual system, on described housing, configuration is with the Man Machine Interface of keyboard display floater, and setting and the monitoring of heat-pump hot-water unit are carried out in described Single-chip Controlling unit by Man Machine Interface.
A kind of further improved technical scheme of a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, it is characterized in that described Single-chip Controlling unit also comprises the control bus interface module, described constant temperature flow regulator is by the control bus interface module, be connected to the master control system of a heating type heat pump hot water group of dual system, realize centralized Control and remote monitoring function.
The beneficial effects of the utility model are:
1, heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, by monolithic processor controlled constant temperature flow valve is set, according to leaving water temperature, carry out discharge PID adjusting, adjustable range is wide, control is accurate, less scaling and obstruction, by obfuscation identify, intelligent control, guarantee under different operating modes can cause the demand the rapidly hot water of temperature of source pump, when security of system is stable, have higher efficiency and heating capacity.
2, heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model adopts SCM program to control and realizes constant temperature flow valve pid algorithm, can be according to the difference between leaving water temperature and design temperature, change the governing speed of constant temperature flow valve, reach and reach fast the water outlet design temperature, can guarantee that again system and leaving water temperature are stable; Its defrosting control method, can guarantee that product can reasonably enter and exit defrost, and defrost thoroughly, efficiently.
3, heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, in the time of can realizing the changing environment temperature, different initial openings are controlled, and while guaranteeing the unit start, initial opening is near the aperture of actual demand; While solving low ambient temperature, occur easily that condensation effect is bad, heating capacity is low, can heterodyne, the problem of the easy superpressure ratio of compressor, by low ambient temperature, access at present the water design temperature, improve the condensation effect of source pump, improve heating capacity and the efficiency of source pump, can guarantee again not superpressure ratio operation of compressor.Simultaneously, by temperature-constant operation, guarantee that water tank temperature reaches design temperature.
4, heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, by the fault to occurring, carry out the synthesization analyzing and processing, a system in dual system breaks down when out of service, by lowering the water outlet design temperature, guarantee the discharge of source pump, improve heating capacity and the efficiency of condensation effect and unit, thereby guarantee that another does not have out of order system energy safety, stable, efficient operation.
The accompanying drawing explanation
Fig. 1 is the heat pump water-heating machine structural representation that uses a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model;
Fig. 2 is the theory diagram of the Single-chip Controlling unit of constant temperature flow regulator of the present utility model;
Fig. 3 is the external interface circuit figure of Single-chip Controlling unit and control signal output driver element;
Fig. 4 is the control flow chart of a heating type heat pump hot water group constant temperature flow regulator of dual system;
Fig. 5 is the defrosting control flow chart of a heating type heat pump hot water group constant temperature flow regulator of dual system.
The label of each parts in above figure: 1-compressor, the 2-cross valve, the 3-expansion valve, the 4-finned heat exchanger, the 5-gas-liquid separator, the 6-low tension switch, the 7-high-voltage switch gear, the 8-hydraulic pressure switch, 9-pressure differential detection valve, the 10-double-tube heat exchanger, the 11-entering water electromagnetic valve, 12-constant temperature flow valve, the 13-by-passing valve, 14-constant temperature water pump, 15-running water entrance, 16-constant temperature water inlet, 17-constant-temperature effluent mouth, 20-Single-chip Controlling unit, 21-temperature signal collection processing module, 22-switching signal acquisition processing module, 23-entering water electromagnetic valve control module, 24-source pump control module, 25-constant temperature flow valve aperture setting module, 26-constant temperature flow valve pid stream amount adjustment module, 27-thermostatic pump control module, the 28-bypass valve control module, 29-defrost mode control module, 30-control signal output driver element, A-heat pump A, B-heat pump B, C-is for water heating system.
The specific embodiment
In order to understand better technique scheme of the present utility model, describe in detail further below in conjunction with drawings and Examples.
Fig. 1 is an embodiment who uses a heating type heat pump hot water group of dual system of constant temperature flow regulator of the present utility model, and heating type heat pump hot water group of described dual system comprises heat pump A, heat pump B and confession water heating system C; Heat pump A and heat pump B comprise respectively one group of compressor 1, cross valve 2, expansion valve 3, the air source heat pump that finned heat exchanger 4 and gas-liquid separator 5 connect to form; For water heating system C, comprise double-tube heat exchanger 10, entering water electromagnetic valve 11, constant temperature flow valve 12 and constant temperature water pump 14; Running water entrance 15 is connected to the cold water inlet of double-tube heat exchanger 10 successively by entering water electromagnetic valve 11 and constant temperature flow valve 12; The heat storage water tank (not shown), by constant temperature water inlet 16, is connected to the thermostatted water entrance of double-tube heat exchanger 10, and the thermostatted water outlet of double-tube heat exchanger 10 is connected to heat storage water tank by constant-temperature effluent mouth 17 again, forms the thermostatted water closed circuit; At the two ends of constant temperature flow valve 12, be connected in parallel to by-passing valve 13.
Fig. 2 and Fig. 3 have showed an embodiment of a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, comprise 20, one groups of Single-chip Controlling unit temperature-sensing element, one group of switching signal element and control signal output driver element 30;
Described temperature-sensing element comprises exhaust gas temperature sensor, be used to obtaining the delivery temperature Tp of compressor 1; The water tank temperature sensor, be used to obtaining water tank temperature Ts; The leaving water temperature sensor, be used to obtaining the leaving water temperature Tw of double-tube heat exchanger 10; The fin temperature sensor, be used to obtaining the fin temperature T c of finned heat exchanger 4, and environment temperature sensor, be used to obtaining environment temperature Th;
Described switching signal element comprises the cistern water level switch for detection of heat storage water tank water level upper and lower bound, for the pressure switch signal of source pump overvoltage or under-voltage protection, and be used to controlling the control panel switch of unit operation; Fig. 1 and Fig. 2 omitted temperature-sensing element and part switching signal element and and control module between line;
An embodiment of Single-chip Controlling unit 20 as shown in Figure 2, comprising:
Temperature signal collection processing module 21, for gathering source pump and environment temperature by described temperature-sensing element;
Switching signal acquisition processing module 22, for gathering the on-off state signal of source pump by described switching signal element;
Entering water electromagnetic valve control module 23 and source pump control module 24, be connected to the output of switching signal acquisition processing module 22, according to heat storage water tank water level upper and lower bound signal, according to the startup sequential requirement of source pump, produce the control signal of entering water electromagnetic valve 11 and compressor 1;
Constant temperature flow valve aperture setting module 25 and constant temperature flow valve pid stream amount adjustment module 26, be connected to the output of temperature signal collection processing module 21, according to delivery temperature Tp, leaving water temperature Tw and water outlet temperature setting value Tws, calculate constant temperature flow valve aperture setting value, and produce constant temperature flow valve aperture control signal;
Thermostatic pump control module 27, be connected to the output of temperature signal collection processing module 21, according to water tank temperature Ts and water outlet temperature setting value Tws, produces the control signal of constant temperature water pump 14;
Bypass valve control module 28, be connected to the output of temperature signal collection processing module 21, according to leaving water temperature Tw, produces the control signal of by-passing valve 13.
According to the embodiment of Fig. 1 to a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model shown in Figure 3, described switching signal element also comprises low tension switch 6, high-voltage switch gear 7, hydraulic pressure switch 8, pressure differential detection valve 9, and heat pump A fault-signal and heat pump B fault-signal; Single-chip Controlling unit 20 is by switching signal acquisition processing module 22, gather each on-off state signal of described switching signal element, the running status of judgement heat pump A and heat pump B, produce dual system resultant fault signal, sends constant temperature flow valve aperture setting module 25 to.
Another embodiment according to a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, on the finned heat exchanger 4 of the heat pump A of a heating type heat pump hot water group of dual system and heat pump B, two fin temperature sensors are set respectively; Single-chip Controlling unit 20 also comprises defrosting control module 29; Temperature signal collection processing module 21 is obtained the detected temperatures of two fin temperature sensors, usings its mean value as fin temperature T c; If when open circuit or short trouble appear in a fin temperature sensor, use the temperature of another fin temperature sensor detection as fin temperature T c; Defrosting control module 29 is connected to the output of temperature signal collection processing module 21, according to environment temperature Th, water tank temperature Ts and fin temperature T c, sequential according to defrost requires to produce the defrosting control signal, via control signal output driver element 30, be connected to the cross valve 2 of heat-pump hot-water unit, control the source pump startup or exit the defrost running status.
An embodiment according to a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, Single-chip Controlling unit 20 and control signal output driver element 30 are assembled in the housing of control device, form the constant temperature flow regulator that is independent of a heating type heat pump hot water group of dual system, on described housing, configuration is with the Man Machine Interface 40 of keyboard display floater, setting and the monitoring of heat-pump hot-water unit are carried out in Single-chip Controlling unit 20 by Man Machine Interface 40, for example, by keyboard, input water outlet temperature setting value Tws, by display floater, show water temperature and operating states of the units.
Another embodiment according to a heating type heat pump hot water group constant temperature flow regulator of dual system of the present utility model, described Single-chip Controlling unit 20 also comprises the control bus interface module, for example, Modbus protocol bus interface module, the constant temperature flow regulator is by the control bus interface module, be connected to the master control system of a heating type heat pump hot water group of dual system, realize centralized Control and remote monitoring function, for example, by remote monitoring terminal, set out coolant-temperature gage setting value Tws, show water temperature and operating states of the units.
Fig. 4 is the flow chart of the control method of use chip microcontroller constant temperature Flow-rate adjustment of the present utility model, the flow chart of the present embodiment has only comprised the basic step that realizes the constant temperature flow rate adjusting method, has omitted the required well-known routines steps of process such as microsystem computer software and hardware power-up initializing that those skilled in the art were familiar with.
The embodiment of the control method of use chip microcontroller constant temperature Flow-rate adjustment of the present utility model shown in Figure 4 comprises the following steps:
S100) read out coolant-temperature gage setting value Tws and water temperature return difference setting value Twd;
S120) as environment temperature Th, during lower than-5 ℃, water outlet temperature setting value Tws is adjusted into to 40 ℃; Select the temperature-constant operation mode of priority, guarantee that water tank temperature Ts reaches design temperature; The utility model, by when low ambient temperature, is lowered water outlet temperature setting value Tws, improves the condensation effect of product, improves heating capacity and the efficiency of product, can guarantee again not superpressure ratio operation of compressor.Simultaneously, by the temperature-constant operation pattern, guarantee that water tank temperature reaches the water outlet temperature setting value.Thereby the heating effect of the system of assurance.
S140) running status of judgement heat pump A and heat pump B, when the fault that has a system to occur that compressor can not open in dual system, be adjusted into 40 ℃ by water outlet temperature setting value Tws; The utility model gathers each on-off state signal of dual system source pump by the switching signal acquisition processing module, the running status of judgement heat pump A and heat pump B, produce dual system resultant fault signal, then according to the fault to occurring, carry out the comprehensive analysis processing result, by at triangular web, breaking down, access at present coolant-temperature gage setting value Tws, guarantee the discharge of source pump, guarantee that another does not have out of order system energy safety, stable, efficient operation.When system operates in low ambient temperature, occur easily that condensation effect is bad, heating capacity is low, can heterodyne, the situation of the easy superpressure ratio of compressor.
S160) by the temperature signal collection processing module, detect in real time the temperature of each temperature-sensing element; By the switching signal acquisition processing module, detect in real time the on off state of each switching signal;
S180) when the heat storage water tank water level lower than water level under in limited time, according to the startup sequential requirement of source pump, open entering water electromagnetic valve, make the constant temperature flow valve be opened to initial opening, unit starting once heats operational mode.Source pump starts an embodiment of the control sequential that once heats operational mode: entering water electromagnetic valve is opened, time delay 3 seconds, and the constant temperature flow valve is opened to initial opening, and rear fan, compressor were opened in 10 seconds, and constant temperature flow valve initial opening remains unchanged in 60 seconds.
S200) when water level lower than water level under in limited time, open entering water electromagnetic valve, start compressor, unit enters and once heats operational mode S300;
S300) once heat operational mode: call constant temperature flow valve pid algorithm, the water outlet temperature setting value Tws of take is desired value, according to leaving water temperature detected value Tw, control constant temperature flow valve aperture, regulating water flow, be consistent leaving water temperature Tw and water outlet temperature setting value Tws;
S380) when the water level of storage tank reached designated water level, unit was out of service;
While S400) as water tank temperature Ts, reducing because of heat radiation, open constant temperature water pump, compressor, unit enters temperature-constant operation Mode S 420;
S420) temperature-constant operation pattern: when water tank temperature Ts sets value Twd lower than water outlet temperature setting value Tw-water temperature return difference, open constant temperature water pump, compressor, unit carries out temperature-constant operation, after water tank temperature Ts reaches water outlet temperature setting value Tws, unit exits the temperature-constant operation pattern, turns to step S380;
S500) too high when inflow temperature, when leaving water temperature Tw exceeds the adjustable range of constant temperature flow valve, open by-passing valve; After leaving water temperature is reduced in the adjustable range of constant temperature flow valve, close by-passing valve.According to embodiment of the present utility model shown in Figure 4, the preferred adjustable range of constant temperature flow valve is 65 ℃≤Tw≤55 ℃, that is to say, when leaving water temperature Tw surpasses 65 ℃, open by-passing valve, increase the unit flow of inlet water, thereby reduce leaving water temperature Tw, improve the efficiency of product, when leaving water temperature Tw is reduced to 55 ℃, close by-passing valve.
According to the embodiment of the control method of use chip microcontroller constant temperature Flow-rate adjustment shown in Figure 4, the described constant temperature flow valve of step S300 pid algorithm comprises the following steps:
S320), according to leaving water temperature Tw and delivery temperature Tp, determine delivery temperature correction value Δ Tp according to following condition:
If Tp>Tw+50, Δ Tp=5;
If Tw+20≤Tp≤Tw+50, Δ Tp=0;
If Tp<Tw+20, Δ Tp=-3;
S340) according to formula
△T=(Tw-Tws)+ΔTp；
Ks=S*△T；
Determine constant temperature flow valve aperture Ks; Wherein, Tw is the leaving water temperature detected value, and Tws is the water outlet temperature setting value, and Tp is delivery temperature, and Δ Tp is the delivery temperature correction value, and Ks is constant temperature flow valve aperture, and S is the governing speed coefficient, S=10～20.
Step S340, according to the difference between leaving water temperature Tw and water outlet temperature setting value Tws, changes the governing speed of constant temperature flow valve, and wherein, the governing speed coefficient S is determined according to following condition:
When 5<△ T, S=20;
When-5≤△ T≤5, S=10;
When △ T<-5, S=20.
In the control method of the use chip microcontroller constant temperature Flow-rate adjustment that the utility model shown in Figure 4 provides, also comprise the constant temperature mode of priority and once heat running priority model selection step:
S200) if select the temperature-constant operation mode of priority, no matter the water level of water tank needs only water tank temperature Ts lower than water outlet temperature setting value Tws-water temperature return difference Twd, unit proceeds to the temperature-constant operation pattern immediately;
S220) if select once to heat the running priority pattern, no matter water tank temperature Ts is how many, need only water level lower than the water level lower limit, unit proceeds to immediately and once heats operational mode.
Another embodiment according to the control method of use chip microcontroller constant temperature Flow-rate adjustment of the present utility model, the process that also comprises the defrost running status control that produces the defrost clock signal, to guarantee that dual system heat-pump hot-water unit can reasonably start and exit the defrost running status, and defrost thoroughly, efficiently.Defrost running status control procedure as shown in Figure 5, comprises the following steps:
S600) each system in a heating type heat pump hot water group of dual system arranges respectively two fin temperature sensors, and the detected temperatures mean value of two fin temperature sensors of foundation, as fin temperature T c, is determined the defrost startup and exits temperature; When open circuit or short trouble appear in a fin temperature sensor, use the temperature of another fin temperature sensor detection as fin temperature T c, determine the defrost startup and exit temperature;
S620) defrost entry condition:
When environment temperature Th>15 ℃, unit does not enter defrost;
When 7 ℃<environment temperature Th≤15 ℃,
During water tank temperature Ts>45 ℃, unit does not enter defrost;
During water tank temperature Ts≤45 ℃, move after 90 minutes, if fin temperature T c continues to reach 5 minutes lower than 0 ℃, unit enters defrost;
When-2 ℃<environment temperature Th≤7 ℃, move after 40 minutes, if fin temperature T c continues to reach 5 minutes lower than-4 ℃, unit enters defrost;
When environment temperature Th≤-2 ℃, move after 30 minutes, if fin temperature T c continues to reach 5 minutes lower than Th-3 ℃, unit enters defrost;
If environment temperature Th<-2 ℃ and continue 120 minutes, unit does not also reach except the defrost entry condition, and unit forces to enter defrost.
S640) defrost exit criteria:
When within 3 minutes defrost time, if fin temperature T c reaches 6 ℃, exit defrost;
When the defrost time is after 3 minutes, if fin temperature T c reaches 12 ℃, exit defrost;
When the defrost time, reach 10 minutes, compulsory withdrawal defrost.
Those of ordinary skill in the art will be appreciated that; above embodiment illustrates the technical solution of the utility model; and not be used as restriction of the present utility model; any variation, modification of the above embodiment being done based on connotation of the present utility model, all will drop in the protection domain of claim of the present utility model.
Claims (5)
1. heating type heat pump hot water group constant temperature flow regulator of a dual system, a described heating type heat pump hot water group is heat pump A, heat pump B and the heating type heat pump hot water group of dual system formed for water heating system; Described constant temperature flow regulator comprises the Single-chip Controlling unit, one group of temperature-sensing element, and one group of switching signal element and control signal output driver element is characterized in that:
Described temperature-sensing element comprises exhaust gas temperature sensor, be used to obtaining the delivery temperature of compressor; The water tank temperature sensor, be used to obtaining water tank temperature; The leaving water temperature sensor, be used to obtaining the leaving water temperature of double-tube heat exchanger; The fin temperature sensor, be used to obtaining the fin temperature of finned heat exchanger, and environment temperature sensor, be used to obtaining environment temperature;
Described switching signal element comprises the cistern water level switch for detection of heat storage water tank water level upper and lower bound;
Described Single-chip Controlling unit, by described control signal output driver element, is connected to the compressor of a heating type heat pump hot water group of dual system, entering water electromagnetic valve, constant temperature flow valve, by-passing valve and constant temperature water pump;
Described Single-chip Controlling unit comprises:
The temperature signal collection processing module, for gathering source pump and environment temperature by described temperature-sensing element;
The switching signal acquisition processing module, for gathering the on-off state signal of described source pump by described switching signal element;
Entering water electromagnetic valve control module and source pump control module, be connected to the output of described switching signal acquisition processing module, according to heat storage water tank water level upper and lower bound signal, according to the startup sequential requirement of source pump, produce the control signal of entering water electromagnetic valve and compressor;
Constant temperature flow valve aperture setting module and constant temperature flow valve pid stream amount adjustment module, be connected to the output of described temperature signal collection processing module, according to delivery temperature, leaving water temperature and water outlet temperature setting value, calculate constant temperature flow valve aperture setting value, and produce constant temperature flow valve aperture control signal;
The thermostatic pump control module, be connected to the output of described temperature signal collection processing module, according to water tank temperature and water outlet temperature setting value, produces the control signal of constant temperature water pump;
Bypass valve control module, be connected to the output of described temperature signal collection processing module, according to leaving water temperature, produces the control signal of by-passing valve.
2. heating type heat pump hot water group constant temperature flow regulator of dual system according to claim 1, it is characterized in that described switching signal element also comprises low tension switch, high-voltage switch gear, hydraulic pressure switch, pressure differential detection valve, and heat pump A fault-signal and heat pump B fault-signal; Described Single-chip Controlling unit is by described switching signal acquisition processing module, gather each on-off state signal of described switching signal element, the running status of judgement heat pump A and heat pump B, produce dual system resultant fault signal, send described constant temperature flow valve aperture setting module to.
3. heating type heat pump hot water group constant temperature flow regulator of dual system according to claim 1, it is characterized in that, on the finned heat exchanger of described heat pump A in a heating type heat pump hot water group of dual system and heat pump B, two fin temperature sensors are set respectively; Described Single-chip Controlling unit also comprises the defrosting control module; Described temperature signal collection processing module is obtained the detected temperatures of two fin temperature sensors, usings its mean value as the fin temperature; If when open circuit or short trouble appear in a fin temperature sensor, use the temperature of another fin temperature sensor detection as the fin temperature; Described defrosting control module is connected to the output of described temperature signal collection processing module, according to environment temperature, water tank temperature and fin temperature, sequential according to defrost requires to produce the defrosting control signal, via described control signal output driver element, be connected to the cross valve of heat-pump hot-water unit, control the source pump startup or exit the defrost running status.
4. heating type heat pump hot water group constant temperature flow regulator of dual system according to claim 1, it is characterized in that described Single-chip Controlling unit and control signal output driver element are assembled in the housing of control device, form independently heating type heat pump hot water group constant temperature flow regulator of dual system, on described housing, configuration is with the Man Machine Interface of keyboard display floater, and setting and the monitoring of heat-pump hot-water unit are carried out in described Single-chip Controlling unit by Man Machine Interface.
5. heating type heat pump hot water group constant temperature flow regulator of dual system according to claim 1, it is characterized in that described Single-chip Controlling unit also comprises the control bus interface module, described constant temperature flow regulator is by the control bus interface module, be connected to the master control system of a heating type heat pump hot water group of dual system, realize centralized Control and remote monitoring function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203464282U CN203310109U (en) | 2013-06-17 | 2013-06-17 | Constant-temperature flow adjustment device for double-system primary-heating water heating unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203464282U CN203310109U (en) | 2013-06-17 | 2013-06-17 | Constant-temperature flow adjustment device for double-system primary-heating water heating unit |
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| CN203310109U true CN203310109U (en) | 2013-11-27 |
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| CN2013203464282U Withdrawn - After Issue CN203310109U (en) | 2013-06-17 | 2013-06-17 | Constant-temperature flow adjustment device for double-system primary-heating water heating unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277892A (en) * | 2013-06-17 | 2013-09-04 | 江苏天舒电器有限公司 | Thermostatic flow regulating device of single-heating type heat-pump water heating unit and control method of thermostatic flow regulating device |
| CN105020903A (en) * | 2015-07-03 | 2015-11-04 | 广东美的暖通设备有限公司 | Backup running processing method and system of commercial water heaters |
-
2013
- 2013-06-17 CN CN2013203464282U patent/CN203310109U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277892A (en) * | 2013-06-17 | 2013-09-04 | 江苏天舒电器有限公司 | Thermostatic flow regulating device of single-heating type heat-pump water heating unit and control method of thermostatic flow regulating device |
| CN105020903A (en) * | 2015-07-03 | 2015-11-04 | 广东美的暖通设备有限公司 | Backup running processing method and system of commercial water heaters |
| CN105020903B (en) * | 2015-07-03 | 2018-01-02 | 广东美的暖通设备有限公司 | The reserve operation processing method and system of a kind of commercial hot water machine |
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