CN104769364A - Thermal equilibrium set and control method and control apparatus thereof - Google Patents
Thermal equilibrium set and control method and control apparatus thereof Download PDFInfo
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- CN104769364A CN104769364A CN201280076473.9A CN201280076473A CN104769364A CN 104769364 A CN104769364 A CN 104769364A CN 201280076473 A CN201280076473 A CN 201280076473A CN 104769364 A CN104769364 A CN 104769364A
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- 238000000034 method Methods 0.000 title claims description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 227
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000008400 supply water Substances 0.000 description 4
- 230000002596 correlated effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A thermal equilibrium set comprises a heat supply pipeline and a control apparatus. The heat supply pipeline comprises a user water inlet pipe (1), a user water return pipe (2) and a by-pass pipe (3). The control apparatus comprises a controller (6), a temperature sensor connected to the controller (6), and a motorized valve (5) and a water pump (4) arranged on the heat supply pipeline. First ends of the user water inlet pipe (1) and the user water return pipe (2) are connected to a heat supply unit (S1), and second ends are connected to an end user (S2). An adjustment frequency at which the controller (6) adjusts an opening degree of the motorized valve (5) is equal to or greater than an adjustment frequency at which the controller (6) adjusts a rotating speed of the water pump (4). The controller (6) determines whether a temperature difference between water inlet temperature of the user water inlet pipe (1) and water return temperature of the user water return pipe (2) detected by the temperature sensor is within a preset temperature difference range; if the temperature difference is greater than an upper limit of the preset temperature difference range, the controller increases the rotation speed of the water pump; if the temperature difference is less than a lower limit of the preset temperature difference range, the controller decreases the rotation speed of the water pump.
Description
Thermal balance unit and its control method and control device technical field
The present invention relates to heating system, more particularly to a kind of thermal balance unit and its control method and control device.Background technology
Central heating system includes being used to produce the hot equipment such as the steam power plant of thermal source and heat is transported to the heating network of terminal user, and thermal balance unit is generally provided with the heating network of terminal user front end.
As shown in Fig. 1, the mechanical structure portion for the thermal balance unit of heating system including one end is connected to heating unit
S1 (or thermal source, the heating network for example come out from steam power plant）, the other end be connected to two heat supplying pipelines of terminal user's S2 radiators, one is user's water inlet pipe 1, one is user's return pipe 2, bypass pipe 3 is installed between user's water inlet pipe 1 and user's return pipe 2, the left side of bypass pipe 3 is close to heating unit Sl, referred to as the first side of thermal balance unit, bypass pipe 3 and its right side, close to terminal user, are the second side of thermal balance unit.
For user's water inlet pipe 1, the first side of user's water inlet pipe 11 and the second side of user's water inlet pipe 12 can be divided into using the intersection point of user's water inlet pipe 1 and bypass pipe 3 as boundary;Equally, for user's return pipe 2, can also the intersection point of user's return pipe 2 and bypass pipe 3 be boundary, be divided into the first side of user's return pipe 21 and the second side of user's return pipe 22.
As shown in figure 1, water pump 4 can be provided with user's water inlet pipe 1, user's return pipe 2 or bypass pipe 3, to provide heating medium（Hot water）The circulation power flowed in heat supplying pipeline.Check valve 7 is also equipped with bypass pipe 3, motor-driven valve 5 is installed in the first side of user's water inlet pipe 11 or the first side of user's return pipe 21.The hot water for coming from heating unit is entered terminal user S2 radiator by the first side of user's water inlet pipe 11 through the second side of user's water inlet pipe 12（Not shown in figure）After radiating the first side of user's return pipe 21 is flowed into through the second side of user's return pipe 22, in the presence of check valve 7 and motor-driven valve 5, the heating medium flowed into the second side of user's return pipe 22 can flow back to heating unit Sl through the first side of user's return pipe 21, and terminal user S2 radiator can also be again flowed into behind bypass pipe 3, the second side of user's water inlet pipe 12；Or the part in the heating medium in the second side of user's return pipe 22 flows back to heating unit Sl, another part again flows into terminal user S2 radiator through bypass pipe 3, the second side of user's water inlet pipe 12, participates in circulation cooling.
However, traditional central heating has huge energy waste situation.Heat supplying pipeline in thermal balance unit generally occurs for the thermal loss of central heating, and the key factor for causing heat loss is that fluid power is uneven, and fluid power imbalance means Low Temperature Difference in heating system（Δ Τ, i.e. inflow temperature and the return water temperature temperature difference）And high flow capacity, the heat exchange between heat supplying pipeline and environment causes substantial amounts of thermal losses.
However, the thermal balance unit of the central heating of prior art, does not control effectively for above-mentioned situation.The thermal balance unit allocation method of prior art, only carries out flow constant control, or is adjusted just for inflow temperature or return water temperature, and can not accomplish efficient energy-saving simultaneously and improve comfort level.The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of thermal balance machine set control device, efficient energy-saving can not be accomplished simultaneously and improve the technical problem of comfort level by solving the thermal balance machine set control device of prior art.
Another object of the present invention is to provide a kind of thermal balance unit allocation method, efficient energy-saving can not be accomplished simultaneously and improve the technical problem of comfort level by solving existing thermal balance unit allocation method.
The present invention also aims to provide a kind of thermal balance unit with thermal balance machine set control device of the present invention.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of thermal balance machine set control device, the heat supplying pipeline of the thermal balance unit includes the first end connection heating unit of user's water inlet pipe, user's return pipe and bypass pipe, user's water inlet pipe and user's return pipe, the second end connection terminal user；The thermal balance machine set control device includes controller and the temperature sensor being connected with the controller and the motor-driven valve and water pump that are arranged on the heat supplying pipeline；The controller includes sensor assembly, motor-driven valve control module and water pump control modules：The sensor assembly, to receive temperature signal that the temperature sensor detected and send the motor-driven valve control module and water pump control modules to；The motor-driven valve control module, to control the aperture of the motor-driven valve to adjust, the motor-driven valve is connected on user's water inlet pipe or user's return pipe, and the motor-driven valve control module is adjusted in the range of inflow temperature to set water temperature of the aperture of the motor-driven valve to adjust the side of user's water inlet pipe second；The water pump control modules, the adjustment of rotational speed to control the water pump is extremely set in temperature range with the temperature difference for adjusting the inflow temperature and the return water temperature of user's return pipe that the temperature sensor is detected.
The thermal balance unit of the present invention, the thermal balance machine set control device with the present invention.
A kind of thermal balance unit allocation method, the thermal balance unit includes heat supplying pipeline and control device, and the heat supplying pipeline includes user's water inlet pipe, user's return pipe and bypass pipe；The control device includes controller and the temperature sensor being connected with the controller and the motor-driven valve and water pump that are arranged on the heat supplying pipeline；The first end connection heating unit of user's water inlet pipe and user's return pipe, the second end connection terminal user；The motor-driven valve, is connected on user's water inlet pipe or user's return pipe, and the controller is adjusted in the range of inflow temperature to set water temperature of the aperture of the motor-driven valve to adjust the side of user's water inlet pipe second；The temperature difference that the controller adjusts the rotating speed of the water pump to adjust the inflow temperature and the return water temperature of user's return pipe that the temperature sensor is detected extremely is set in temperature range.
As shown from the above technical solution, thermal balance unit of the invention and its control method and the advantage and good effect of control device are：Present invention is primarily directed to the mixture circulatory system with automatic/hand/distance control mode, it not only can be with the supply water temperature of control terminal user, and can control the temperature difference of the return at user；Temperature controlling range can be expanded simultaneously, optimum energy-saving effect is reached.In order to reduce thermal loss, save the electric energy of water circulating pump, the present invention proposes to join together flow and temperature control, so supply water temperature changes with the thermal load demands of outdoor temperature or reality, flow is correspondingly as the temperature difference changes automatically simultaneously, one more economical heat balance system is built between heat source side and user terminal, can change the heat demand amount that user is met with relatively low cost according to outdoor temperature.The temperature difference of thermal balance unit inflow temperature and return water temperature（Δ Τ) it is vital, if the temperature difference increase between inflow temperature and return water temperature, identical heat can be changed into than relatively low flow.The present invention is advantageous in that maximized other of Δ Τ, and total fuel efficiency of steam power plant is high, electrical efficiency is high, the pump energy needed for during heated conveying is low, reduces related distribution loss.
By description of a preferred embodiment referring to the drawings, above-mentioned and other objects, features and advantages of the invention will be apparent from.Brief description of the drawings
Fig. 1 is the schematic diagram of the thermal balance unit of prior art；
Fig. 2 is the schematic diagram of the thermal balance unit allocation method of first embodiment of the invention；
Fig. 3 is the schematic diagram of the thermal balance unit allocation method of third embodiment of the invention；
Fig. 4 is the schematic diagram of the thermal balance unit allocation method of fourth embodiment of the invention；
Fig. 5 is the schematic diagram of the thermal balance unit allocation method of fifth embodiment of the invention；
Fig. 6 is the schematic diagram of the thermal balance machine set control device of the embodiment of the present invention.Embodiment
The specific embodiment of the present invention is described more fully below.It should be noted that the embodiments described herein is served only for for example, being not intended to limit the invention.
The thermal balance unit of the embodiment of the present invention, the thermal balance machine set control device with the embodiment of the present invention carries out the control of aperture and rotating speed using the thermal balance unit allocation method of the embodiment of the present invention.
The thermal balance unit of various embodiments of the present invention, can be the heat supply control for one or several residential building.Control method embodiment 1
As shown in Fig. 2 the thermal balance unit allocation method of first embodiment of the invention, its present invention implementation applied
The thermal balance unit of example includes heat supplying pipeline and control device, the heat supplying pipeline includes user's water inlet pipe 1, user's return pipe 2 and bypass pipe 3, for user's water inlet pipe 1 and user's return pipe 2, it can be boundary with the intersection point of bypass pipe 3, be respectively divided into the first side of user's water inlet pipe 11 and the second side of user's water inlet pipe 12, the first side of user's return pipe 21 and the second side of user's return pipe 22.And the first end connection heating unit Sl of user's water inlet pipe 1 and user's return pipe 2, the second end connection terminal user S2.And control device includes controller 6, temperature sensor, motor-driven valve 5 and water pump 4.Water pump 4 is preferably variable frequency pump, can adjust rotating speed, for example, mug(unit of measure) nano-electron pump（) or TPE electronic pumps Magna, the frequency conversion part of water pump 4, can both be arranged in the body of water pump 4 on heat supplying pipeline, can also be arranged in controller 6, therefore water pump 4 both can be integral type variable frequency pump or split type variable frequency pump.
The temperature sensor, is connected to controller 6, and detected temperature data is returned to controller 6.In the present embodiment, temperature sensor includes inflow temperature sensor T2, return water temperature sensor Τ 3 and outdoor temperature sensors TO, is respectively used to detection inflow temperature, return water temperature and outdoor temperature.Wherein, inflow temperature sensor T2 is arranged at the second side of user's water inlet pipe 12, and return water temperature sensor T3 is arranged at the second side of user's return pipe 22, and outdoor temperature sensors TO is then arranged at open air, the temperature for detecting actual open air.
In the present embodiment, water pump 4 is connected on user's water inlet pipe 1, specifically it is connected to the second side of user's water inlet pipe 12, and the thermal balance unit allocation method of first embodiment of the invention, the control of its control device is mainly reflected in the adjustment of rotational speed to water pump 4 and the aperture to motor-driven valve 5 is adjusted.And the correlated condition of the invention to the adjustment of rotational speed of water pump 4 is the change of the temperature difference between inflow temperature and return water temperature.In addition, although motor-driven valve 5 is arranged on user's return pipe 2, specifically in the first side of user's return pipe 21, the correlated condition for carrying out aperture adjustment is the change of the inflow temperature detected by inflow temperature sensor T2.It is of course also possible to return water temperature sensor T3 be set in the first side of user's return pipe 21, to detect return water temperature.
And the change and the change of return water temperature of above-mentioned temperature difference, it is after beyond the poor scope of a design temperature or setting inflow temperature scope, to be just adjusted；And it is adjusted in two kinds of situation, a kind of is the upper limit for exceeding the poor scope of design temperature or setting inflow temperature scope, another lower limit for being less than the poor scope of design temperature or setting inflow temperature scope.And the poor scope of design temperature or setting inflow temperature scope, it is then to fluctuate ± 0.1 scholar 1 in the poor central value of design temperature and setting inflow temperature central value and is formed, the poor central value of such as design temperature and sets ± the 0.3 or ± 0.5 of inflow temperature central value and formed.
The thermal balance unit allocation method of the embodiment of the present invention, its design temperature difference central value and setting inflow temperature central value are relevant with outdoor temperature, the present invention is exactly in view of only carrying out flow constant control in the prior art, or just for inflow temperature or return water temperature be adjusted and can not at the same accomplish efficient energy-saving and improve comfort level defect, for different outdoor temperatures, the rotating speed of water pump 4 is adjusted according to the temperature difference central value of corresponding inflow temperature and return water temperature
To adjust the flow velocity in heat supplying pipeline, the aperture of motor-driven valve 5 is adjusted according to corresponding return water temperature central value to adjust the flow in heat supplying pipeline.
Two above-mentioned corresponding relations, the prior mapping table obtained by many experiments or corresponding relation curve that can be stored by controller（Function）, when being adjusted, the outdoor temperature transmitted for outdoor temperature sensors TO by way of searching above-mentioned mapping table or passes through corresponding relation curve（Function）Obtained the mode that calculates.Can also using table look-up with calculate be combined by the way of.
Mapping table for example shown in table 1.The situation that table 1 is applicable is that area of heat-supply service is 7500m2, thermic load Wei That I m2Situation.
Table 1
As shown in table 1, in the present embodiment, pass through external condition first, control the inflow temperature of the first side of user's water inlet pipe 11 constant all the time, and due to return water temperature sensor T3 only one of which, therefore, the return water temperature in the return water temperature and the second side of user's return pipe 22 in the first side of user's return pipe 21 is also considered as equal.As shown in Table 1, the inflow temperature of the first side and the temperature difference of return water temperature increase with the increase of outdoor temperature, and the inflow temperature of the second side and the temperature difference of return water temperature below 4 °C when be to increase with the increase of outdoor temperature.
In order to illustrate to become apparent from, line number in table 1 is less, field is more, but in controller 6, it is only necessary to store
The look-up table of the field such as " outdoor temperature ", " inflow temperature of the second side ", " At of the second side "（Or curve）
, " inflow temperature of the second side " therein, namely the setting inflow temperature central value to be searched, and " At of the second side ", then it is the central value of the poor scope of the design temperature to be searched.Detect after outdoor temperature, search " At of the second side " and " inflow temperature of the second side " corresponding to the outdoor temperature, to determine the need for adjustment.
Certainly, the line number of above-mentioned look-up table is limited after all, when being tabled look-up, perhaps the numerical value of some outdoor temperatures is not stored in above-mentioned look-up table, for example by taking the precision of table 1 as an example, 2 °C, -3 °C of outdoor temperature value is not appeared in table 1, then can pass through linear function interpolation by 0 °C of its two ends and 4 °C by the method for interpolation（That is linear interpolation）Mode come determine the second side corresponding to 2 °C of outdoor temperature value inflow temperature be 64 °C, the Δ t of second side is 29.5 °C, the inflow temperature of the second side corresponding to -3 °C of outdoor temperature value is 66.5 °C, and the At of the second side is 26 °C.In order to improve accuracy, it would however also be possible to employ the method such as quadratic interpolation.
When specifically carrying out the aperture adjustment of motor-driven valve 5, whether controller 6 judges inflow temperature that inflow temperature sensor T2 detects in the range of the setting inflow temperature in table 1, inflow temperature detected sets the upper limit of inflow temperature scope higher than as described in, the control motor-driven valve 5 of controller 6 reduces aperture, inflow temperature detected sets the lower limit of inflow temperature scope less than as described in, then the control of controller 6 motor-driven valve 5 increase aperture；The amplitude specifically increased can be determined by actual conditions.
When specifically carrying out the adjustment of rotational speed each time of water pump 4, whether controller 6 judges the difference of inflow temperature that inflow temperature sensor T2 detects and the return water temperature sensor T3 return water temperatures detected in the setting temperature range in table 1, such as the upper limit of the difference higher than setting temperature range of inflow temperature and return water temperature, controller 6 controls the increase of water pump 4 rotating speed；Such as less than the lower limit of setting temperature range, the reduction of water pump 4 rotating speed is controlled, specific adjustment amplitude is also determined by concrete condition.
The inflow temperature detected using temperature sensor is 75 °C, return water temperature is 64 °C, outdoor temperature is -16 °C, temperature difference scope and return water temperature scope are taken exemplified by central value ± 0.3, because the temperature difference detected is I C, and table look-up and understand that outdoor temperature is to set inflow temperature scope as 73 °C ± 0.3 corresponding to -16 °C, the poor scope of corresponding design temperature is 13 °C ± 0.3, therefore, because the inflow temperature detected has exceeded the upper limit of setting inflow temperature, therefore control motor-driven valve 5 reduces aperture to reduce return water temperature, due to lower limit of the temperature difference less than the poor scope of design temperature detected, therefore control water pump 4 reduces rotating speed to improve temperature difference.
Because inflow temperature had both been relevant to the adjustment of the aperture of motor-driven valve 5, also relating to the adjustment of rotational speed of water pump 4, it therefore, it can consider the adjustment frequency of the aperture for increasing motor-driven valve 5 adjustment to improve regulated efficiency, increase Adjustment effect（Or perhaps control effect）.
Therefore, the thermal balance unit allocation method of first embodiment of the invention, controller 6 carries out the adjustment of aperture adjustment
Frequency is at least being not less than the adjustment frequency for carrying out adjustment of rotational speed, the adjustment frequency of such as aperture adjustment can be 1-3 multiple of the adjustment frequency of adjustment of rotational speed, the adjustment frequency of aperture adjustment is, for example, 0.2-1 beats/min, the adjustment frequency of adjustment of rotational speed is, for example, 0.1-0.5 beats/min, it is preferred that, the adjustment frequency of aperture adjustment is 0.2 beat/min, and the adjustment frequency of adjustment of rotational speed is 0.1 beat/min.In the case of frequency identical, aperture adjustment is preferably first carried out, then carry out adjustment of rotational speed；Such as adjustment frequency is all 0.1 beat/min（Namely adjust 1 time for 10 minutes）In the case of, then can be in the 0.5-2 minutes before carrying out adjustment of rotational speed（Preferably 1 minute）An aperture adjustment is carried out, to reduce the number of times of adjustment of rotational speed, the energy is saved, increases the stability of thermal balance unit.But the invention is not limited in this, aperture adjustment adjustment frequency can greater than, equal to or less than adjustment of rotational speed adjustment frequency.
When specifically carrying out aperture adjustment and adjustment of rotational speed, controller 6 can control the rotating speed of the water pump 4 and the aperture of the motor-driven valve 5 by pid control mode, and its PID control parameter can pass through man-machine interface（Human Machine Interface, abbreviation HMI) control or telecommunication modify.Control method embodiment 2
The control method of the thermal balance unit of the present invention, its aperture is adjusted between adjustment of rotational speed can also mutual close association, namely on the basis of embodiment 1, joint regulation is carried out to motor-driven valve 5 and water pump 4, namely the aperture adjustment of the related motor-driven valve 5 of adjustment of rotational speed of water pump 4, and the adjustment of the aperture of motor-driven valve 5 mutually cuts out the pump 4 adjustment of rotational speed.
And in order to shorten the time that the mixture circulatory system in thermal balance unit reaches stable state, can " formal " aperture adjustment before carry out aperture it is presetting, and " formal " aperture adjustment before progress aperture it is presetting.Therefore, within each adjustment cycle, aperture adjustment, presetting rotating speed, adjustment of rotational speed and each presetting step of aperture are carried out successively, is moved in circles.
And carry out that rotating speed is presetting as follows with the presetting condition of aperture, first, presetting rotating speed is that basis is carried out as follows judgement：1st, when water pump 4 is in stable state, that is, the temperature difference detected is in the poor scope of design temperature, when water pump 4 need not carry out adjustment of rotational speed：
Adjusted according to the aperture of motor-driven valve, do and be adjusted to positive relative to aperture（Or in the same direction）It is presetting, presetting amplitude adjusts amplitude for 50% * apertures.Aperture adjustment amplitude is the ratio of this opening value and the maximum opening of motor-driven valve 5 that are increasedd or decreased.Forward and reverse mentioned here, refer to identical or in opposite direction with the previous aperture direction adjusted, it is identical for direction with " aperture increasing " and " faster rotational speed ", if the i.e. aperture increase of motor-driven valve 5, it is positive that then the rotating speed of water pump 4, which is increased, and it is reverse that the rotating speed of water pump 4, which reduces,；Conversely, if the aperture of motor-driven valve 5 reduces, it is to be adjusted to positive presetting relative to aperture that the rotating speed of water pump 4, which reduces, and it is to be adjusted to reverse presetting relative to aperture that the rotating speed of water pump 4, which is increased,.
2nd, when the temperature difference detected is not in the poor scope of design temperature, when water pump 4 need to do positive adjustment according to the method for embodiment 1：
Adjusted according to previous aperture, the rotating speed for doing forward direction is presetting, the amplitude that the aperture that presetting amplitude is 50% is adjusted.Herein, it is the amplitude proportional that adjusts aperture, is converted into the rotational speed regulation ratio of water pump.
In embodiment 1, the aperture adjustment of motor-driven valve 5 and the adjustment of rotational speed of water pump 4 are carried out in accordance with different adjustment frequencies, in the present embodiment, increase rotating speed it is presetting it is presetting with aperture after, it is possible to happens is that：After the completion of rotating speed is presetting, when water pump has arrived the adjustment of rotational speed of " formal ", it is likely that need not have adjusted.Then the aperture of motor-driven valve 5 is normally carried out regulation again（Stable state may also be reached, motor-driven valve 5 need not temporarily have adjusted again）, reciprocation cycle.
3rd, when the temperature difference detected is not in the poor scope of design temperature, when water pump 4 need to do reverse adjustment according to the method for embodiment 1, rotating speed is not done presetting.
More than each step in, if aperture adjustment need not be carried out and aperture is presetting, the adjustment of rotational speed and rotating speed individually carried out is presetting.
Meanwhile, aperture preconditioning is according to judgement is carried out as follows, and described Direct/Reverse is defined as above below：1st, when motor-driven valve is in stable state（That is the inflow temperature of the second side of user's water inlet pipe 12 is in the range of set water temperature, and motor-driven valve 5 need not carry out aperture adjustment）When：
According to a preceding adjustment of rotational speed for water pump 4, the aperture for doing forward direction is presetting, and the amplitude of regulation is the amplitude of 50% * adjustment of rotational speed.The amplitude of adjustment of rotational speed is equal to the ratio of the knots modification of rotating speed and the maximum (top) speed of water pump 4.
2nd, the inflow temperature of the second side of user's water inlet pipe 12 is not in the range of set water temperature, when the aperture that motor-driven valve 5 need to make forward direction according to the method for embodiment 1 is adjusted：
According to the adjustment of rotational speed of water pump 4, the aperture for doing forward direction is presetting, and the amplitude of regulation is the amplitude of 50% * adjustment of rotational speed.
3rd, the inflow temperature of the second side of user's water inlet pipe 12 when motor-driven valve 5 need to do reverse aperture adjustment according to the method for embodiment 1, aperture is not done presetting in the range of set water temperature.
Described 50% above-mentioned ratio, it is not limited to 50% concrete numerical value, can be between 0-70%.
Control method embodiment 3
As shown in figure 3, the thermal balance unit allocation method of third embodiment of the invention, compared with first and second embodiment, position of the motor-driven valve 5 with water pump 4 on heat supplying pipeline is identical with the thermal balance unit allocation method of first embodiment of the invention.
Unlike, in the present embodiment, in addition to outdoor temperature sensors T0, inflow temperature sensor Τ 2 and return water temperature sensor Τ 3, the inflow temperature sensor Tl for the inflow temperature for detecting its position is also provided with the first side of user's water inlet pipe 11.
Setting inflow temperature sensor T1 benefit is, whether the inflow temperature that the first side of user's water inlet pipe 11 can be monitored at any time is maintained at a steady temperature at any time, if it find that the inflow temperature at this changes, influence of the change of external conditions to inflow temperature at this should be then excluded in time, to ensure the precise control of thermal balance unit allocation method of the present invention.
Simultaneously, control device in the present embodiment also includes pressure sensor, specifically, including be arranged at the first side of user's water inlet pipe 11 be used for detect its position water feeding pressure pressure sensor Pl, be arranged at the second side of user's water inlet pipe 12 be used for detect its position water feeding pressure pressure sensor Ρ 2 and be arranged on the second side of user's return pipe 22 be used for detect its position backwater hydraulic pressure pressure sensor Ρ 3.Set the advantage of pressure sensor to be, the water pressures in heat supplying pipeline can be monitored in real time, when occurring overpressure situation, manually or automatically mode can carry out release, the normal operation of thermal balance unit is influenceed to prevent water from pressing through high.
In addition to above-mentioned difference, the thermal balance unit allocation method of third embodiment of the invention, the adjustment of its aperture, the adjustment frequency of adjustment of rotational speed, adjustment process etc. are identical with the thermal balance unit allocation method of first and second embodiment, repeat no more.
Control method embodiment 4
As shown in Figure 4, the thermal balance unit allocation method of fourth embodiment of the invention, compared with 3rd embodiment, position of the water pump 4 on heat supplying pipeline is identical with the thermal balance unit allocation method of third embodiment of the invention, but in the present embodiment, the position of motor-driven valve 5 is different from 3rd embodiment, and motor-driven valve 5 is provided in the first side of user's water inlet pipe 11.
In the present embodiment, temperature sensor is identical with 3rd embodiment with the setting and effect of pressure sensor.In the present embodiment, controller 6 is when carrying out adjustment of rotational speed, the temperature difference detected is still the temperature difference of the second side of user's water inlet pipe 12 and the second side of user's return pipe 22, adjustment frequency, adjustment process to pump rotary speed etc., it is identical with the thermal balance unit allocation method of first and second embodiment, repeat no more.
From unlike above-mentioned three embodiment, in the present embodiment, because motor-driven valve 5 is provided on the first side of user's water inlet pipe 11, but carry out the change that the correlated condition of the aperture adjustment of motor-driven valve 5 is still the inflow temperature of the second side of user's water inlet pipe 12 detected by inflow temperature sensor Τ 2.The temperature difference considered during the adjustment of rotational speed of water pump 5 is still the temperature difference of the second side of user's water inlet pipe 12 and the second side of user's return pipe 22, therefore, in the present embodiment,
Relation between the adjustment frequency adjusted for aperture and its adjustment frequency with carrying out adjustment of rotational speed is identical with preceding two embodiment.
Control method embodiment 5
As shown in Figure 5, the thermal balance unit allocation method of fifth embodiment of the invention, compared with the thermal balance unit allocation method of fourth embodiment, position of the motor-driven valve 5 on heat supplying pipeline is identical with the thermal balance unit allocation method of fourth embodiment of the invention, but in the present embodiment, the position of water pump 4 is different from fourth embodiment, and water pump 4 is provided in the first side of user's return pipe 21.
In the present embodiment, temperature sensor is identical with first embodiment with the setting and effect of pressure sensor.In the present embodiment, controller 6 is when carrying out adjustment of rotational speed, although the position that water pump 4 is set is varied from, but the temperature difference detected is still the temperature difference of the side of user's water inlet pipe second and the side of user's return pipe second, adjustment frequency, adjustment process adjusted to pump rotary speed etc., it is identical with the thermal balance unit allocation method of fourth embodiment, repeat no more.
In the present embodiment, because the position of motor-driven valve 5 does not change, therefore adjustment process, adjustment frequency and its relation between the adjustment frequency of progress adjustment of rotational speed adjusted for aperture, it is identical with fourth embodiment.
Each embodiment of summary understands that the water pump 4 in thermal balance unit allocation method of the present invention can be arranged on the second side of user's water inlet pipe 12, can also be arranged on the second side of user's return pipe 22;And motor-driven valve 5, then the first side of user's water inlet pipe 11 can be both arranged at, the first side of user's return pipe 21 can also be arranged on;And return water temperature sensor, then the second side of user's return pipe 22 can be arranged on, the first side of user's return pipe 21 can also be arranged on.Control device embodiment
As shown in fig. 6, the thermal balance machine set control device of the embodiment of the present invention, including controller 6 and the temperature sensor being connected with the controller 6 and the motor-driven valve 5 and water pump 4 that are arranged on the heat supplying pipeline;Specifically, motor-driven valve 5 is connected to the first side of user's water inlet pipe 11 or the first side of user's return pipe 12, and water pump 4 is connected to the second side of user's water inlet pipe 12, the second side of user's return pipe 22 or bypass pipe 3.And controller 6 therein includes sensor assembly 60, remote communication module（Or HMI module）61st, motor-driven valve control module 65, water pump control modules 64 and adjustment cycle and frequency control module 66:Wherein, remote communication module 61 or man-machine interface（Human Machine Interface, abbreviation HMI) module 61.
Sensor assembly 60, to receive the temperature signal that the temperature sensor is detected, and sends motor-driven valve control module 65 and water pump control modules 64 to, for carrying out aperture adjustment and adjustment of rotational speed.In the present embodiment, institute
Stating temperature sensor includes being used to detect the inflow temperature sensor Tl of the inflow temperature of the first side of user's water inlet pipe 11, the inflow temperature sensor Τ 2 of inflow temperature for detecting the second side of user's water inlet pipe 12, the return water temperature sensor Τ 3 of return water temperature for detecting the second side of user's return pipe 22 and the outdoor temperature sensors Τ 0 for detecting outdoor temperature.Sensor assembly 60 can also receive the pressure signal that pressure sensor is perceived, and pressure sensor includes being arranged at being used to detect the pressure sensor Pl of the water feeding pressure of its position, being arranged at being used to detect the pressure sensor Ρ 2 of the water feeding pressure of its position and being arranged on the pressure sensor Ρ 3 for being used to detect the backwater hydraulic pressure of its position of the second side of user's return pipe 22 for the second side of user's water inlet pipe 12 for the first side of user's water inlet pipe 11.
Motor-driven valve control module 65 includes aperture adjustment unit and the presetting unit of aperture, water pump control modules 64 include adjustment of rotational speed unit and the presetting unit of rotating speed, the temperature difference that the presetting unit of rotating speed carries out the inflow temperature after aperture adjustment and return water temperature to motor-driven valve 5 according to aperture adjustment unit is presetting to the rotating speed progress rotating speed of water pump 4, and it is presetting to the aperture progress aperture of the motor-driven valve 5 that the presetting unit of aperture carries out the inflow temperature after adjustment of rotational speed to water pump 4 according to adjustment of rotational speed unit.
Adjustment cycle and frequency control module 66, it is connected to remote communication module or Η Μ Ι modules 61, motor-driven valve control module 65 and water pump control modules 64, to control to carry out periodicity adjustment to the aperture of motor-driven valve 5 and the rotating speed of water pump 4, in each cycle, successively by aperture adjustment unit carries out aperture adjustment, the presetting unit progress rotating speed of rotating speed is presetting, adjustment of rotational speed unit carries out adjustment of rotational speed and the presetting unit progress aperture of aperture is presetting.
Simultaneously, adjustment cycle and frequency control module 66 are also to control the adjustment frequency that motor-driven valve control module 65 is adjusted to the aperture of motor-driven valve 5 to be equal to or more than adjustment frequency of the water pump control modules 64 to the adjustment of rotational speed of water pump 4, it is 1-3 times of the adjustment frequency of adjustment of rotational speed for example to control the adjustment frequency that aperture is adjusted, and this multiple can be modified by remote communication module or Η Μ Ι modules 61.
Motor-driven valve control module 65, is connected to sensor assembly 60, remote communication module or Η Μ Ι modules 61 and adjustment cycle and frequency control module 66, to control the aperture of the motor-driven valve 5 to adjust.Further, motor-driven valve control module 65 can include input block, judging unit, memory cell, control unit and output unit.When carrying out the aperture adjustment each time, input block receives the inflow temperature signal that sensor assembly 60 is inputted, and sends judging unit to；Memory cell is used for the corresponding table for storing the corresponding relation for representing the outdoor temperature that the setting inflow temperature scope is detected with the temperature sensor；The inflow temperature that judging unit is inputted with regard to input block, by searching the corresponding table that memory cell is stored, judges the inflow temperature of detection whether in the range of a setting inflow temperature, and will determine that result is sent to control unit；Control unit receives the judged result of judging unit input, inflow temperature is higher than the upper limit for setting inflow temperature scope as described, then generation control motor-driven valve 5 reduces the control signal of aperture, inflow temperature is less than the lower limit of the set water temperature scope as described, then generation control motor-driven valve 5 increases aperture
Control signal, and the control signal generated is exported to motor-driven valve 5 via output unit;Remote communication module or HMI module 61 can be used for remotely-or locally changing the control parameter for carrying out PID control for motor-driven valve 5.
The water pump control modules 64, are connected to sensor assembly 60, remote communication module or HMI module 61 and adjustment cycle and frequency control module 66, the adjustment of rotational speed to control the water pump 4.Further, controlled with motor-driven valve as unit class, water pump control modules 64 can include input block, judging unit, memory cell, control unit and output unit.When carrying out the adjustment of rotational speed each time, input block receives the inflow temperature signal and return water temperature signal that sensor assembly 60 is inputted, and sends judging unit to；Inflow temperature and the corresponding table of the corresponding relation of the temperature difference of return water temperature that memory cell is detected for the poor scope of storage expression design temperature with the temperature sensor；Judging unit calculates the inflow temperature of the input block input and the temperature difference of return water temperature, by searching the corresponding table that memory cell is stored, the temperature difference of the calculated inflow temperature of judgement and return water temperature will determine that result is sent to control unit whether in the range of a set water temperature；Control unit receives the judged result of judging unit input, the temperature difference of inflow temperature and return water temperature is higher than the upper limit of the poor scope of the design temperature as described, then generation control water pump 4 increases the control signal of rotating speed, such as the lower limit of the poor scope of temperature difference design temperature less than as described in of inflow temperature and return water temperature, then generation control water pump 4 reduces the control signal of rotating speed, and the control signal generated is exported into feed pump 4 via output unit;Remote communication module or HMI module 61 can be used for remotely-or locally changing the control parameter for carrying out PID control for water pump 4.
The thermal balance machine set control device of the embodiment of the present invention, can also have remote communication module and HMI module simultaneously.
Industrial applicibility
Present invention is primarily directed to the mixture circulatory system with automatic/hand/distance control mode, it not only can be with the supply water temperature of control terminal user, and can control the temperature difference of the return at user；Temperature controlling range can be expanded simultaneously, optimum energy-saving effect is reached.In order to reduce thermal loss, save the electric energy of circulating pump, the present invention proposes to join together flow and temperature control, so supply water temperature changes with the thermal load demands of outdoor temperature or reality, flow is correspondingly as the temperature difference changes automatically simultaneously, one more economical heat balance system is built between heat source side and user terminal, can change the heat demand amount that user is met with relatively low cost according to outdoor temperature.The temperature difference of thermal balance unit inflow temperature and return water temperature（Δ Τ) it is vital, if the temperature difference increase between inflow temperature and return water temperature, identical heat can be changed into than relatively low flow.The present invention is advantageous in that maximized other of Δ Τ, and total fuel efficiency of steam power plant is high, electrical efficiency is high, the pumping energy needed for during heated conveying is low, reduces related distribution loss.Therefore, the present invention can be widely used in the fields such as central heating.
Claims (25)
- Claim1. a kind of thermal balance machine set control device, the heat supplying pipeline of the thermal balance unit includes user's water inlet pipe（1), user's return pipe（And bypass pipe 2)（3), user's water inlet pipe（1) with user's return pipe（2) first end connection heating unit（S1), the second end connection terminal user（S2) ；The thermal balance machine set control device includes controller（6) and with the controller（6) temperature sensor being connected and the motor-driven valve being arranged on the heat supplying pipeline（And water pump 5)（4) ；It is characterized in that：The controller（6) sensor assembly is included（60), motor-driven valve control module（And water pump control modules 65)（64) ：The sensor assembly（60), to receive temperature signal that the temperature sensor detected and send the motor-driven valve control module to（And/or water pump control modules 65)（64) ；The motor-driven valve control module（65), to control the motor-driven valve（5) aperture adjustment, the motor-driven valve（5) it is connected to user's water inlet pipe（Or user's return pipe 1)（2) on, the motor-driven valve control module（65) motor-driven valve is adjusted（5) aperture is to adjust user's water inlet pipe（1) the second side（12) in the range of inflow temperature to set water temperature；The water pump control modules（64), to control the water pump（4) adjustment of rotational speed, to adjust the inflow temperature and user's return pipe that the temperature sensor is detected（2) in the temperature difference of return water temperature to setting temperature range.2. thermal balance machine set control device as claimed in claim 1, it is characterised in that the aperture adjustment of the related motor-driven valve of the adjustment of rotational speed, the aperture adjusts the adjustment of rotational speed of the related water pump.3. thermal balance machine set control device as claimed in claim 2, it is characterized in that, the motor-driven valve control module includes aperture adjustment unit and the presetting unit of aperture, the water pump control modules include adjustment of rotational speed unit and the presetting unit of rotating speed, the temperature difference that the presetting unit of rotating speed carries out the inflow temperature after aperture adjustment and the return water temperature to the motor-driven valve according to the aperture adjustment unit is presetting to the rotating speed progress rotating speed of the water pump, it is presetting to the aperture progress aperture of the motor-driven valve that the presetting unit of aperture carries out the inflow temperature after adjustment of rotational speed to the water pump according to the adjustment of rotational speed unit.4. thermal balance machine set control device as claimed in claim 3, it is characterised in that the controller also includes adjustment cycle and frequency control module（66), to control to carry out periodicity adjustment to the aperture of the motor-driven valve and the rotating speed of the water pump, in each cycle, successively by aperture adjustment unit carries out aperture adjustment, the presetting unit progress rotating speed of rotating speed is presetting, adjustment of rotational speed unit carries out adjustment of rotational speed and the presetting unit progress aperture of aperture is presetting.5. thermal balance machine set control device as claimed in claim 1, it is characterised in that the temperature sensor includes being used to detect user's water inlet pipe（1) the second side（12) inflow temperature sensor of the inflow temperature（T2) and for detecting user's return pipe（2) the return water temperature sensor of the return water temperature（T3) .6. thermal balance machine set control device as claimed in claim 5, it is characterised in that the temperature sensor also includes the outdoor temperature sensors for being used to detect outdoor temperature（TO), the setting temperature range and the outdoor temperature sensors（TO the outdoor temperature) detected is corresponding, the setting inflow temperature scope and the outdoor temperature sensors（TO the outdoor temperature) detected is corresponding.7. thermal balance machine set control device as claimed in claim 1, it is characterised in that the controller（6) it is integrated in the water pump（Or the motor-driven valve 4)（5) on.8. thermal balance machine set control device as claimed in claim 1, it is characterised in that the controller（6) remote communication module and/or HMI module are also included（61) .9. thermal balance machine set control device as claimed in claim 6, it is characterised in that the return water temperature sensor (T3) is arranged at the side of user's return pipe second（22) .10. thermal balance machine set control device as claimed in claim 1, it is characterised in that the water pump（4) it is arranged at the side of user's water inlet pipe second（12), the motor-driven valve（5) it is arranged at the side of user's return pipe first（21).11. thermal balance machine set control device as claimed in claim 1, it is characterised in that the motor-driven valve（5) it is arranged at the side of user's water inlet pipe first（11), the water pump（4) it is arranged at the side of user's water inlet pipe second（12).12. thermal balance machine set control device as claimed in claim 1, it is characterised in that the water pump（4) it is integral type or split type variable frequency pump（4) .13. thermal balance machine set control device as claimed in claim 1, it is characterised in that the thermal balance unit also includes pressure sensor, the pressure sensor includes being used to detect the side of user's water inlet pipe first（11) the first pressure sensor of water feeding pressure（P1), for detecting the side of user's water inlet pipe second（12) the second pressure sensor of the second water feeding pressure（P2) and for detecting the side of user's return pipe second（22) the 3rd pressure sensor of backwater hydraulic pressure（P3) .14. a kind of thermal balance unit, it is characterised in that the thermal balance unit has any described thermal balance machine set control devices of claim 1-13.15.-kind of thermal balance unit allocation method, the thermal balance unit includes heat supplying pipeline and control device, the heat supplying pipeline includes user's water inlet pipe（1), user's return pipe（And bypass pipe 2)（3) ；The control device includes controller（6) and with the controller（6) temperature sensor being connected and the motor-driven valve being arranged on the heat supplying pipeline（And water pump 5)（4) ；User's water inlet pipe（1) with user's return pipe（2) One end connects heating unit（SI), the second end connection terminal user（S2 ) ；It is characterized in that：The motor-driven valve（5), it is connected to user's water inlet pipe（Or user's return pipe 1)（2) on, the controller（6) motor-driven valve is adjusted（5) aperture is to adjust user's water inlet pipe（1) the second side（12) in the range of inflow temperature to set water temperature；The controller（6) water pump is adjusted（4) rotating speed is to adjust the inflow temperature that the temperature sensor is detected and user's return pipe（2) in the temperature difference of return water temperature to setting temperature range.16. thermal balance unit allocation method as claimed in claim 15, it is characterised in that the aperture adjustment of the related motor-driven valve of the adjustment of rotational speed of the water pump, the aperture of the motor-driven valve adjusts the adjustment of rotational speed of the related water pump.17. thermal balance unit allocation method as claimed in claim 15, it is characterized in that, adjustment to the electronic valve opening includes aperture adjustment and aperture is presetting, adjustment to the pump rotary speed includes adjustment of rotational speed and rotating speed is presetting, wherein controller is presetting according to the temperature difference progress rotating speed of the inflow temperature after aperture adjustment and the return water temperature, carries out the aperture according to the inflow temperature after the adjustment of rotational speed presetting.18. thermal balance unit allocation method as claimed in claim 17, it is characterized in that, the controller carries out periodicity adjustment to the aperture of the motor-driven valve and the rotating speed of the water pump, in each cycle, aperture adjustment, presetting rotating speed, adjustment of rotational speed and aperture are carried out successively presetting.19. thermal balance unit allocation method as claimed in claim 17, it is characterized in that, the presetting amplitude of the rotating speed is the 0 70% of the amplitude of the last aperture adjustment, and the presetting amplitude of the aperture is the 0 70% of the amplitude of the last adjustment of rotational speed.20. thermal balance unit allocation method as claimed in claim 19, it is characterized in that, when the temperature difference of the inflow temperature and the return water temperature is not being set in temperature range, such as need to carry out to be adjusted to the positive adjustment of rotational speed relative to the aperture, then it is presetting without the rotating speed.21. thermal balance unit allocation method as claimed in claim 20, it is characterized in that, when the inflow temperature is not being set in temperature range, it is positive aperture adjustment that need to such as carry out relative to the adjustment of rotational speed, then presetting without the aperture.22. thermal balance unit allocation method as claimed in claim 21, it is characterised in that the temperature sensor includes the outdoor temperature sensors for being used to detect outdoor temperature（TO), the setting temperature range and the outdoor temperature sensors（TO the outdoor temperature) detected is corresponding, the setting inflow temperature scope and the outdoor temperature sensors（TO the outdoor temperature) detected is corresponding.23. thermal balance unit allocation method as claimed in claim 15, it is characterised in that the controller（6) The water pump is controlled by pid control mode（4) rotating speed and the motor-driven valve（5) aperture.24. thermal balance unit allocation method as claimed in claim 23, it is characterized in that, the central value of the setting temperature range is obtained by searching the mapping table of the poor scope central value of the outdoor temperature and the design temperature, and the central value of the setting temperature range of the outdoor temperature in the mapping table is not obtained by its neighbouring outdoor temperature value by linear interpolation.25. thermal balance unit allocation method as claimed in claim 24, it is characterised in that the temperature range that sets is central value ± 0.3 or ± 0.5 of the setting temperature range.
Applications Claiming Priority (1)
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| PCT/CN2012/084777 WO2014075303A1 (en) | 2012-11-16 | 2012-11-16 | Thermal equilibrium set and control method and control apparatus thereof |
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| CN104769364B CN104769364B (en) | 2017-09-08 |
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| WO (1) | WO2014075303A1 (en) |
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| CN109028250A (en) * | 2018-07-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Heating pipeline, heating system and control method |
| CN109737485A (en) * | 2018-12-15 | 2019-05-10 | 阿诗丹顿燃具有限公司 | Combustion type heating system of water heater and its control device and method |
| CN110173911A (en) * | 2019-06-27 | 2019-08-27 | 川田机械制造(上海)有限公司 | Novel cooling-water machine |
| CN112254352A (en) * | 2020-09-18 | 2021-01-22 | 华帝股份有限公司 | Water pump exhaust method for wall-mounted boiler |
| CN112286131A (en) * | 2020-10-23 | 2021-01-29 | 中国电子系统工程第二建设有限公司 | MAU control system and high-precision control method for MAU of electronic clean workshop |
| CN113606782A (en) * | 2021-07-30 | 2021-11-05 | 宁波奥克斯电气股份有限公司 | Variable frequency control method and device of heat pump unit, storage medium and heat pump unit |
| CN116839091A (en) * | 2023-05-15 | 2023-10-03 | 山东和同信息科技股份有限公司 | Heat exchange station automatic control parameter setting method based on deep learning |
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| WO2014075303A1 (en) | 2014-05-22 |
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