WO2014075303A1 - Ensemble à équilibre thermique et procédé de commande et appareil de commande associés - Google Patents

Ensemble à équilibre thermique et procédé de commande et appareil de commande associés Download PDF

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Publication number
WO2014075303A1
WO2014075303A1 PCT/CN2012/084777 CN2012084777W WO2014075303A1 WO 2014075303 A1 WO2014075303 A1 WO 2014075303A1 CN 2012084777 W CN2012084777 W CN 2012084777W WO 2014075303 A1 WO2014075303 A1 WO 2014075303A1
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WIPO (PCT)
Prior art keywords
adjustment
temperature
user
electric valve
opening degree
Prior art date
Application number
PCT/CN2012/084777
Other languages
English (en)
Chinese (zh)
Inventor
蒙让森⋅尼尔斯
顾群林
吴登昊
虞波
陈华
Original Assignee
格兰富控股联合股份公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 格兰富控股联合股份公司 filed Critical 格兰富控股联合股份公司
Priority to CN201280076473.9A priority Critical patent/CN104769364B/zh
Priority to PCT/CN2012/084777 priority patent/WO2014075303A1/fr
Priority to CN201320727574.XU priority patent/CN203586393U/zh
Priority to CN201320727677.6U priority patent/CN203586394U/zh
Publication of WO2014075303A1 publication Critical patent/WO2014075303A1/fr

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Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates to a heating system, in particular to a heat balance unit and a control method and control device therefor. Background technique
  • the central heating system includes thermal equipment such as a thermal power plant for generating a heat source and a heating pipe network for delivering heat to the end user, and a heat balance unit is usually installed on the heating pipe network at the front end of the terminal user.
  • the mechanical structure of the heat balance unit for the heating system includes one end connected to the heating unit.
  • a bypass pipe 3 is installed between the user inlet pipe 1 and the user return pipe 2, and the left side of the bypass pipe 3 is adjacent to the heating unit S1, which is called the first side of the heat balance unit, and the bypass pipe 3 and its right side are close to the terminal.
  • the second side of the heat balance unit is the first side of the heat balance unit.
  • the intersection of the user inlet pipe 1 and the bypass pipe 3 can be defined as the first side 11 of the user inlet pipe and the second side 12 of the user inlet pipe; likewise, for the user return pipe 2 It may also be defined by the intersection of the user return pipe 2 and the bypass pipe 3, and is divided into a user return pipe first side 21 and a user return pipe second side 22.
  • a water pump 4 may be installed on the user inlet pipe 1, the user return pipe 2 or the bypass pipe 3 to provide a circulating power for the heat medium (hot water) to flow in the heat supply pipe.
  • a check valve 7 is also mounted on the bypass pipe 3, and an electric valve 5 is mounted on the first side 11 of the user inlet pipe or the first side 21 of the user return pipe.
  • the hot water from the heating unit is fed from the first side 11 of the user inlet pipe through the second side 12 of the user inlet pipe into the radiator of the end user S2 (not shown), and then flows into the user via the second side 22 of the user return pipe.
  • the radiator of the end user S2 may be flowed again through the bypass pipe 3 and the second side 12 of the user inlet pipe; or a part of the heating medium in the second side 22 of the user return pipe flows back to the heating unit S1, and the other part
  • the bypass pipe 3 and the second side 12 of the user inlet pipe flow again into the radiator of the end user S2 to participate in the circulating heat dissipation.
  • the heat loss of central heating usually occurs in the heating pipeline in the heat balance unit.
  • the important factor causing the heat loss is the hydraulic imbalance.
  • the hydraulic imbalance means the low temperature difference in the heating system ( ⁇ ⁇ , ie the inlet water temperature The temperature difference from the return water temperature) and the high flow rate, the heat exchange between the heat supply line and the environment causes a large amount of heat loss.
  • the prior art central heating heat balance unit does not effectively control the above situation.
  • the prior art method for controlling the heat balance unit only performs constant flow control, or only adjusts for the inlet water temperature or the return water temperature, and cannot simultaneously achieve energy saving and high comfort. Summary of the invention
  • an object of the present invention is to provide a heat balance unit control device that solves the technical problem that the prior art heat balance unit control device cannot simultaneously achieve energy saving and high efficiency.
  • Another object of the present invention is to provide a heat balance unit control method that solves the technical problem that the existing heat balance unit control method cannot simultaneously achieve energy saving and high efficiency.
  • the present invention adopts the following technical solutions:
  • a heat balance unit control device the heat supply line of the heat balance unit includes a user inlet pipe, a user return pipe and a bypass pipe, and the first end of the user inlet pipe and the user return pipe is connected to the heating unit, The two ends are connected to the end user;
  • the heat balance unit control device includes a controller and a temperature sensor connected to the controller, and an electric valve and a water pump disposed on the heating pipeline;
  • the controller includes a sensor module, and an electric motor a valve control module and a water pump control module: the sensor module is configured to receive a temperature signal detected by the temperature sensor and transmit the temperature signal to the electric valve control module and the water pump control module;
  • the electric valve control module is configured to control the The opening degree adjustment of the electric valve is connected to the user inlet pipe or the user return pipe, and the electric valve control module adjusts the opening degree of the electric valve to adjust the water inlet of the second side of the user inlet pipe
  • the temperature is within a set water temperature range;
  • the water pump control module is configured to control
  • the heat balance unit of the present invention has the heat balance unit control device of the present invention.
  • a heat balance unit control method the heat balance unit includes a heat supply line and a control device, the heat supply line includes a user inlet pipe, a user return pipe, and a bypass pipe;
  • the control device includes a controller and the a temperature sensor connected to the controller and an electric valve and a water pump disposed on the heating pipe; a first end of the user inlet pipe and the user return pipe is connected to the heating unit, and the second end is connected to the end user;
  • the electric valve is connected to the user inlet pipe or the user return pipe, and the controller adjusts the opening degree of the electric valve to adjust the inlet water temperature of the second side of the user inlet pipe to the set water temperature range;
  • the controller adjusts a rotational speed of the water pump to adjust a temperature difference between the water inlet temperature detected by the temperature sensor and a return water temperature of the user return pipe to a set temperature difference range.
  • the present invention is mainly directed to a hybrid circulation system having an automatic/manual/remote control mode, which can control not only the end user but also the end user.
  • the water supply temperature and can control the temperature difference returned from the user; at the same time, the temperature control range can be expanded to achieve the best energy saving effect.
  • the present invention proposes to combine the flow rate and the temperature control so that the water supply temperature changes with the outdoor temperature or the actual heat load demand, and the flow rate automatically changes with the temperature difference accordingly, one A more economical heat balance system is established between the heat source end and the customer end, and can meet the user's heat demand at a lower cost according to the outdoor temperature change.
  • the temperature difference ( ⁇ ) between the inlet and outlet temperatures of the heat balance unit is critical. If the temperature difference between the inlet and return temperatures increases, the same amount of heat can be converted to a lower flow.
  • Other benefits of the present invention for maximizing ⁇ are that the thermal power plant has a high overall fuel efficiency, high electrical efficiency, low pumping energy required during heat transfer, and reduced associated distribution losses.
  • Figure 1 is a schematic view of a prior art heat balancer unit
  • FIG. 2 is a schematic view showing a control method of a heat balance unit according to a first embodiment of the present invention
  • Figure 3 is a schematic view showing a control method of a heat balance unit according to a third embodiment of the present invention.
  • Figure 4 is a schematic view showing a control method of a heat balance unit according to a fourth embodiment of the present invention.
  • Figure 5 is a schematic view showing a control method of a heat balance unit according to a fifth embodiment of the present invention.
  • Fig. 6 is a schematic view of a heat balance unit control device according to an embodiment of the present invention. detailed description
  • the heat balance unit of the embodiment of the invention has the heat balance unit control device of the embodiment of the invention, and the heat balance unit control method of the embodiment of the invention is used for controlling the opening degree and the rotation speed.
  • the heat balance unit of each embodiment of the present invention may be used for heating control of one or several residential buildings.
  • Control method embodiment 1
  • the heat balance unit of the example includes a heating pipe and a control device, and the heating pipe includes a user inlet pipe 1, a user return pipe 2, and a bypass pipe 3.
  • the bypass pipe can be bypassed
  • the intersection of the tubes 3 is bounded and divided into a user inlet pipe first side 11 and a user inlet pipe second side 12, a user return pipe first side 21 and a user return pipe second side 22.
  • the first end of the user inlet pipe 1 and the user return pipe 2 is connected to the heating unit S1, and the second end is connected to the end user S2.
  • the control device comprises a controller 6, a temperature sensor, an electric valve 5 and a water pump 4.
  • the water pump 4 is preferably a variable frequency water pump, and the speed can be adjusted, for example, a Magna electronic pump (Magna) or a TPE electronic pump, and the frequency conversion component of the water pump 4 can be set in the water pump 4 body of the heating pipeline or can be set.
  • the water pump 4 can be either an integrated variable frequency water pump or a split type variable frequency water pump.
  • the temperature sensor is coupled to the controller 6, and returns the detected temperature data to the controller 6.
  • the temperature sensor includes an inlet water temperature sensor T2, a return water temperature sensor ⁇ 3, and an outdoor temperature sensor TO for detecting the inlet water temperature, the return water temperature, and the outdoor temperature, respectively.
  • the inlet water temperature sensor T2 is disposed on the second side 12 of the user inlet pipe
  • the return water temperature sensor T3 is disposed on the second side 22 of the user return pipe
  • the outdoor temperature sensor TO is disposed outdoors to detect the actual outdoor temperature.
  • the water pump 4 is connected to the user inlet pipe 1, specifically to the second side 12 of the user inlet pipe, and the control method of the heat balance unit of the first embodiment of the present invention is mainly embodied in the control device.
  • the rotational speed adjustment of the water pump 4 and the opening degree adjustment of the electric valve 5 are performed.
  • the relevant condition for adjusting the rotational speed of the water pump 4 of the present invention is the change in the temperature difference between the inlet water temperature and the return water temperature.
  • the electric valve 5 is provided in the user return pipe 2, specifically, on the first side 21 of the user return pipe, the condition for performing the opening degree adjustment is the change in the inlet water temperature detected by the inlet water temperature sensor T2.
  • the return water temperature sensor T3 is also possible to set the return water temperature sensor T3 on the first side 21 of the user return pipe to detect the return water temperature.
  • the above temperature difference change and the return water temperature change are adjusted after a set temperature difference range or a set inlet water temperature range is exceeded; and the adjustment is performed in two cases, one is over setting
  • the temperature difference range is set or the upper limit of the inlet water temperature range is set, and the other is lower than the set temperature difference range or the lower limit of the set inlet water temperature range.
  • the set temperature difference range or the set inlet water temperature range is formed by floating the center value of the set temperature difference and the set inlet water temperature value by ⁇ 0.1 to ⁇ 1, for example, setting the temperature difference center value and setting It is formed by setting ⁇ 30 or ⁇ 0.5 of the center temperature of the inlet water.
  • the set temperature difference center value and the set inlet water temperature center value are both related to the outdoor temperature.
  • the present invention is directed to the prior art that only the flow constant control is performed, or only for the water inlet.
  • the temperature or the return water temperature is adjusted to avoid the defects of energy saving and high efficiency at the same time.
  • the speed of the water pump 4 is adjusted according to the central value of the temperature difference between the corresponding inlet water temperature and the return water temperature.
  • the opening degree of the electric valve 5 is adjusted according to the corresponding center value of the return water temperature to adjust the flow rate in the heating pipe.
  • the above two correspondences may be stored by the controller in a corresponding relationship table or a corresponding relationship curve (function) obtained through a plurality of experiments in advance, and when the adjustment is made, the outdoor temperature transmitted by the outdoor temperature sensor TO is passed.
  • the manner in which the above correspondence table is searched or obtained by the corresponding relationship curve (function) is obtained. It is also possible to use a combination of look-up tables and calculations.
  • the case applicable in Table 1 is a case where the heating area is 7500 m 2 and the heat load is referred to as I m 2 .
  • the inlet water temperature of the first side 1 1 of the user inlet pipe is always controlled by external conditions, and since there is only one return water temperature sensor T3, the user returns the water pipe first.
  • the return water temperature in side 21 and the return water temperature in the second side 22 of the user return pipe are also considered equal. It can be seen from Table 1 that the temperature difference between the inlet water temperature and the return water temperature on the first side increases as the outdoor temperature increases, and the temperature difference between the inlet water temperature and the return water temperature on the second side is below 4 °C. It increases as the outdoor temperature increases.
  • the number of rows in the above lookup table is limited.
  • some outdoor temperature values may not be stored in the above lookup table.
  • the accuracy of Table 1 is taken as an example, and the outdoor temperature value is 2 ° C. -3 °C does not appear in Table 1, then the interpolation method can be used to determine the outdoor temperature value of 2 °C by one-time interpolation (ie linear interpolation) at 0 ° C and 4 ° C at both ends.
  • the inlet temperature of the second side is 64 ° C
  • the ⁇ t of the second side is 29.5 ° C
  • the inlet temperature of the second side corresponding to the outdoor temperature value -3 ° C is 66.5 ° C.
  • At 26 °C.
  • methods such as quadratic interpolation can also be used.
  • the controller 6 determines whether the inlet water temperature detected by the inlet water temperature sensor T2 is within the set inlet water temperature range in Table 1, if the detected inlet water temperature is higher than Setting the upper limit of the inlet water temperature range, the controller 6 controls the electric valve 5 to decrease the opening degree. If the detected inlet water temperature is lower than the lower limit of the set inlet water temperature range, the controller 6 controls the electric valve. 5 Increase the opening degree; the specific increase range can be determined by the actual situation.
  • the controller 6 determines whether the difference between the inlet water temperature detected by the inlet water temperature sensor T2 and the return water temperature detected by the return water temperature sensor T3 is set in Table 1. Within the temperature difference range, if the difference between the inlet water temperature and the return water temperature is higher than the upper limit of the set temperature difference range, the controller 6 controls the water pump 4 to increase the rotation speed; if the difference is lower than the lower limit of the set temperature difference range, the water pump 4 is controlled. Reduce the speed, the specific adjustment range is also determined by the specific circumstances.
  • the temperature detected by the temperature sensor is 75 °C
  • the return water temperature is 64 °C
  • the outdoor temperature is -16 °C
  • the temperature difference range and the return water temperature range take the center value ⁇ 0.3 as an example, due to the detected
  • the temperature difference is IC
  • the look-up table shows that the outdoor temperature is -16 °C corresponding to the set inlet temperature range of 73 °C ⁇ 0.3, the corresponding set temperature difference range is 13 °C ⁇ 0.3, therefore, due to detection
  • the incoming water temperature exceeds the upper limit of the set inlet water temperature, so the control electric valve 5 reduces the opening degree to lower the return water temperature, and since the detected temperature difference is lower than the lower limit of the set temperature difference range, the water pump 4 is controlled Reduce the speed to increase the temperature difference.
  • the inlet water temperature is related to the adjustment of the opening degree of the electric valve 5 and the rotation speed adjustment of the water pump 4, it is conceivable to increase the adjustment frequency of the opening degree adjustment of the electric valve 5 to improve the adjustment efficiency and increase the adjustment effect (or Said to be the control effect).
  • the controller 6 performs the adjustment of the opening degree adjustment.
  • the frequency is at least not lower than the adjustment frequency for adjusting the speed.
  • the adjustment frequency of the opening adjustment may be 1-3 times the adjustment frequency of the rotation speed adjustment, and the adjustment frequency of the opening adjustment is, for example, 0.2-1 times/minute, the rotation speed adjustment.
  • the adjustment frequency is, for example, 0.1 to 0.5 times/min.
  • the adjustment frequency of the opening adjustment is 0.2 times/min
  • the adjustment frequency of the rotation speed adjustment is 0.1 times/min.
  • the opening degree In the case of the same frequency, it is better to adjust the opening degree first, and then adjust the rotation speed; for example, if the adjustment frequency is 0.1 times/min (that is, the adjustment is performed once every 10 minutes), it can be adjusted before the rotation speed is adjusted. 0.5-2 minutes (preferably 1 minute) An opening adjustment is made to reduce the number of speed adjustments, save energy, and increase the stability of the heat balance unit.
  • the adjustment frequency of the opening degree adjustment may be greater than, equal to, or smaller than the adjustment frequency of the rotation speed adjustment.
  • the controller 6 can control the rotation speed of the water pump 4 and the opening degree of the electric valve 5 through a PID control mode, and the PID control parameter can pass through a human machine interface (Human Machine Interface, Referred to as HMI) Control or remote communication to modify.
  • HMI Human Machine Interface
  • the opening degree adjustment and the speed adjustment can also be closely related to each other, that is, based on the first embodiment, the electric valve 5 and the water pump 4 are jointly adjusted, that is, the water pump 4
  • the rotational speed adjusts the opening degree adjustment of the electric valve 5, and the opening degree of the electric valve 5 adjusts the rotational speed of the associated water pump 4.
  • the opening pre-adjustment can be performed before the "official” opening adjustment, and the opening pre-adjustment is performed before the "official” opening adjustment. Therefore, in each adjustment cycle, the steps of the opening adjustment, the rotational speed pre-adjustment, the rotational speed adjustment, and the opening pre-adjustment are sequentially performed, and the cycle is repeated.
  • the conditions for pre-adjusting the speed and pre-adjusting the opening are as follows. First, the pre-adjustment of the speed is judged as follows: 1. When the water pump 4 is in the steady state, that is, the detected temperature difference is within the set temperature difference range, When the pump 4 does not need to adjust the speed:
  • the pre-adjustment is adjusted to the positive (or the same direction) relative to the opening degree, and the pre-adjustment amplitude is 50% * the opening adjustment range.
  • the opening degree adjustment range is a ratio of the opening degree value that is increased or decreased this time to the maximum opening degree of the electric valve 5.
  • the forward and reverse directions mentioned here mean the same direction or opposite direction as the previous opening degree adjustment, and the direction is the same as the "opening degree increase" and the "speed increase speed", that is, if the electric valve 5 is opened
  • the degree is increased, the rotation speed of the water pump 4 is increased in the forward direction, and the rotation speed of the water pump 4 is decreased.
  • the rotation speed of the water pump 4 is decreased to be positive with respect to the opening degree.
  • the increase in the rotational speed of the water pump 4 is a pre-adjustment adjusted in the opposite direction to the opening degree. 2.
  • the forward speed is pre-adjusted, and the pre-adjustment amplitude is 50% of the degree of opening adjustment.
  • the ratio of the amplitude of the opening adjustment is converted into the speed adjustment ratio of the water pump.
  • the opening degree adjustment of the electric valve 5 and the rotation speed adjustment of the water pump 4 are performed in accordance with different adjustment frequencies.
  • the speed presetting and the opening presetting are increased, it is possible that: When the speed pre-tuning is completed, the pump may not need to be adjusted when it is in the "official" speed adjustment. Then, the opening degree of the electric valve 5 is normally adjusted (it may have reached the steady state, and the electric valve 5 does not need to be adjusted again), and the cycle is repeated.
  • the opening pre-adjustment is judged as follows.
  • the definition of forward and reverse is as follows: 1.
  • the electric valve is in steady state (ie, the inlet temperature of the second side 12 of the user inlet pipe is at the set water temperature)
  • the electric valve 5 does not need to be adjusted for opening):
  • the positive opening pre-adjustment is made, and the adjustment range is 50% * The speed adjustment range.
  • the magnitude of the speed adjustment is equal to the ratio of the amount of change in speed to the maximum speed of the pump 4.
  • the inlet water temperature of the second side of the user inlet pipe 12 is not within the set water temperature range, and the electric valve 5 needs to be adjusted in the positive opening degree according to the method of the first embodiment:
  • the positive opening pre-adjustment is made, and the adjustment range is 50% * The amplitude of the speed adjustment.
  • the inlet water temperature of the second side 12 of the user inlet pipe is within the set water temperature range.
  • the above 50% ratio is not limited to a specific value of 50%, and may be between 0 and 70%.
  • the position of the electric valve 5 and the water pump 4 on the heat supply pipe and the heat balance of the first embodiment of the present invention are compared with the first and second embodiments.
  • the unit control method is the same. The difference is that, in the embodiment, in addition to the outdoor temperature sensor T0, the inlet water temperature sensor ⁇ 2 and the return water temperature sensor ⁇ 3, the first inlet side 1 1 of the user inlet pipe is also provided with the inlet water temperature for detecting the position thereof. Inlet water temperature sensor Tl.
  • the advantage of setting the inlet water temperature sensor T1 is that it can monitor whether the inlet water temperature of the first side 11 of the user inlet pipe is maintained at a constant temperature at any time. If the inlet water temperature is found to change, the external condition change should be promptly eliminated. The influence of the inlet water temperature on this is to ensure the control accuracy of the control method of the heat balance unit of the present invention.
  • control device in this embodiment further includes a pressure sensor, and specifically includes a pressure sensor P1 disposed on the first side 1 1 of the user inlet pipe for detecting the water pressure of the inlet water at the position of the user, and is disposed in the user.
  • the advantage of setting the pressure sensor is that the water pressure in the heating pipeline can be monitored in real time. When an overpressure occurs, the pressure can be relieved manually or automatically to prevent the water pressure from being too high and affecting the normality of the heat balance unit. run.
  • control method of the heat balance unit according to the third embodiment of the present invention the opening degree adjustment, the adjustment frequency of the rotation speed adjustment, the adjustment process, and the like are the same as the heat balance unit control methods of the first and second embodiments, and will not be described again. .
  • the position of the water pump 4 on the heat supply pipe is the same as that of the heat balance unit according to the third embodiment of the present invention, but compared with the third embodiment.
  • the position of the electric valve 5 is different from that of the third embodiment, and the electric valve 5 is disposed on the first side 11 of the user inlet pipe.
  • the arrangement and action of the temperature sensor and the pressure sensor are the same as those of the third embodiment.
  • the detected temperature difference is still the temperature difference between the second side 12 of the user inlet pipe and the second side 22 of the user return pipe, and the adjustment frequency and adjustment process of the pump speed. And the like, which are the same as the heat balance unit control methods of the first and second embodiments, and will not be described again.
  • the relevant condition for adjusting the opening degree of the electric valve 5 is still the inlet water temperature sensor ⁇ 2.
  • the temperature difference considered when the rotational speed of the water pump 5 is adjusted is still the temperature difference between the second side 12 of the user inlet pipe and the second side 22 of the user return pipe. Therefore, in this embodiment, The relationship between the adjustment frequency of the opening degree adjustment and the adjustment frequency for performing the rotation speed adjustment is the same as that of the previous two embodiments.
  • the heat balance unit control method according to the fifth embodiment of the present invention is compared with the heat balance unit control method of the fourth embodiment, the position of the electric valve 5 on the heat supply line and the heat balance of the fourth embodiment of the present invention.
  • the unit control method is the same, but in the present embodiment, the position of the water pump 4 is different from that of the fourth embodiment, and the water pump 4 is disposed on the first side 21 of the user return pipe.
  • the arrangement and action of the temperature sensor and the pressure sensor are the same as those of the first embodiment.
  • the controller 6 performs the speed adjustment, although the position of the water pump 4 is changed, the detected temperature difference is still the temperature difference between the second side of the user inlet pipe and the second side of the user return pipe.
  • the adjustment frequency, the adjustment process, and the like of the pump speed adjustment are the same as those of the heat balance unit of the fourth embodiment, and will not be described again.
  • the water pump 4 in the control method of the heat balance unit of the present invention may be disposed on the second side 12 of the user inlet pipe or on the second side 22 of the user return pipe; and the electric valve 5 may be set.
  • the first side of the user inlet pipe 1 1 may also be disposed on the first side 21 of the user return pipe; and the return water temperature sensor may be disposed on the second side 22 of the user return pipe, or may be disposed on the first side of the user return pipe twenty one.
  • the heat balance unit control device of the embodiment of the present invention includes a controller 6 and a temperature sensor connected to the controller 6 and an electric valve 5 and a water pump 4 disposed on the heating pipeline;
  • the electric valve 5 is connected to the user inlet pipe first side 1 1 or the user return pipe first side 12, and the water pump 4 is connected to the user inlet pipe second side 12, the user return pipe second side 22 or the bypass pipe 3.
  • the controller 6 includes a sensor module 60, a remote communication module (or HMI module) 61, an electric valve control module 65, a water pump control module 64, and an adjustment period and frequency control module 66: wherein the remote communication module 61 can also be a human machine Interface (Human Machine Interface, HMI for short) module 61.
  • HMI Human Machine Interface
  • the sensor module 60 is configured to receive the temperature signal detected by the temperature sensor and transmit it to the electric valve control module 65 and the water pump control module 64 for performing opening degree adjustment and speed adjustment.
  • the temperature sensor includes an inflow temperature sensor T1 for detecting the inlet water temperature of the first inlet 1 1 of the user inlet pipe, and an inlet water temperature sensor 2 for detecting the inlet water temperature of the second side 12 of the user inlet pipe, for detecting The return water temperature sensor ⁇ 3 of the return water temperature of the second side 22 of the user return pipe and the outdoor temperature sensor ⁇ 0 for detecting the outdoor temperature.
  • the sensor module 60 can also receive a pressure signal sensed by the pressure sensor.
  • the pressure sensor includes a pressure sensor P1 disposed on the first side 11 of the user inlet pipe for detecting the water pressure of the inlet, and is disposed on the user inlet pipe second.
  • a pressure sensor ⁇ 2 of the side 12 for detecting the water pressure of the inlet water at the position thereof and a pressure sensor ⁇ 3 provided on the second side 22 of the user return pipe for detecting the return water pressure at the position thereof are provided.
  • the electric valve control module 65 includes an opening adjustment unit and an opening pre-adjustment unit.
  • the water pump control module 64 includes a rotation speed adjustment unit and a rotation speed pre-adjustment unit.
  • the rotation speed pre-adjustment unit adjusts the opening degree of the electric valve 5 according to the opening degree adjustment unit.
  • the temperature difference between the inlet water temperature and the return water temperature pre-adjusts the rotation speed of the water pump 4, and the opening degree pre-adjusting unit opens the opening degree of the electric valve 5 according to the inlet water temperature after the rotation speed adjustment unit adjusts the rotation speed of the water pump 4. Pre-adjustment.
  • the adjustment period and frequency control module 66 is connected to the remote communication module or the ⁇ module 61, the electric valve control module 65 and the water pump control module 64 to control the periodic adjustment of the opening degree of the electric valve 5 and the rotation speed of the water pump 4, each In the cycle, the opening degree adjustment unit performs the opening degree adjustment, the rotation speed pre-adjusting unit performs the rotation speed pre-adjustment, the rotation speed adjustment unit performs the rotation speed adjustment, and the opening degree pre-adjusting unit performs the opening degree pre-adjustment.
  • the adjustment period and frequency control module 66 is further configured to control the adjustment frequency of the electric valve control module 65 to adjust the opening degree of the electric valve 5 to be equal to or greater than the adjustment frequency of the water pump control module 64 to the rotation speed adjustment of the water pump 4, for example, the control opening degree adjustment.
  • the adjustment frequency is 1-3 times the adjustment frequency of the rotation speed adjustment, and this multiple can be modified by the remote communication module or the UI module 61.
  • the electric valve control module 65 is connected to the sensor module 60, the remote communication module or the cymbal module 61, and the adjustment period and frequency control module 66 for controlling the opening degree adjustment of the electric valve 5. Further, the electric valve control module 65 may include an input unit, a determination unit, a storage unit, a control unit, and an output unit.
  • the input unit receives the inflow temperature signal input by the sensor module 60 and transmits it to the judging unit during each of the opening degree adjustments;
  • the storage unit is configured to store the set influent temperature range and the temperature sensor detection a correspondence table of the correspondence relationship of the outdoor temperatures;
  • the determination unit determines whether the detected inlet water temperature is within a set inlet water temperature range by searching the correspondence table stored in the storage unit with respect to the inlet water temperature input by the input unit And sending the judgment result to the control unit;
  • the control unit receives the judgment result input by the judgment unit, and if the water inlet temperature is higher than the upper limit of the set inlet water temperature range, generating the control electric valve 5 to reduce the opening degree a control signal, if the inlet water temperature is lower than a lower limit of the set water temperature range, generating a control electric valve 5 to increase the opening degree
  • the control signal is output to the electric valve 5 via the output unit; the remote communication module or HMI module 61 can be used to remotely or locally modify the control parameters for PID control
  • the water pump control module 64 is connected to the sensor module 60, the remote communication module or the HMI module 61, and the adjustment period and frequency control module 66 for controlling the speed adjustment of the water pump 4. Further, similar to the electric valve control unit, the water pump control module 64 may include an input unit, a determination unit, a storage unit, a control unit, and an output unit.
  • the input unit receives the water inlet temperature signal and the return water temperature signal input by the sensor module 60 and transmits the signal to the determination unit; the storage unit is configured to store the temperature range indicating the set temperature difference and the temperature sensor.
  • the determination unit calculates a temperature difference between the inlet water temperature and the return water temperature input by the input unit, by searching for the storage unit Determining the correspondence table, determining whether the calculated temperature difference between the inlet water temperature and the return water temperature is within a set water temperature range, and transmitting the determination result to the control unit; the control unit receiving the judgment result input by the judgment unit, as described
  • the temperature difference between the water temperature and the return water temperature is higher than the upper limit of the set temperature difference range, and a control signal for controlling the increase of the rotational speed of the water pump 4 is generated, for example, the temperature difference between the inlet water temperature and the return water temperature is lower than the set temperature.
  • a control signal for controlling the water pump 4 to decrease the rotational speed is generated, and the generated control signal is outputted via the output list Output feed pump 4;
  • remote communication module or HMI module 61 may be used to modify the local or remote control parameters for the PID control of the pump 4.
  • the thermal balance unit control device of the embodiment of the invention may also have a remote communication module and an HMI module.
  • the invention mainly aims at a hybrid circulation system with automatic/manual/remote control mode, which can not only control the water supply temperature of the end user, but also control the temperature difference returned from the user; at the same time, the temperature control range can be expanded to achieve the best energy saving effect. .
  • the present invention proposes to combine the flow rate and the temperature control, so that the water supply temperature changes with the outdoor temperature or the actual heat load demand, and the flow rate automatically changes with the temperature difference accordingly, one A more economical heat balance system is established between the heat source end and the customer end, and can meet the user's heat demand at a lower cost according to the outdoor temperature change.
  • the temperature difference ( ⁇ ) between the inlet and outlet temperatures of the heat balance unit is critical. If the temperature difference between the inlet and return temperatures increases, the same amount of heat can be converted to a lower flow.
  • Other advantages of the present invention in maximizing ⁇ are that the thermal power plant has a high overall fuel efficiency, high electrical efficiency, low pumping energy required during heat transfer, and reduced associated distribution losses. Therefore, the present invention can be widely applied to fields such as central heating.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

Ensemble à équilibre thermique comprenant une conduite d'alimentation en chaleur et un appareil de commande. La conduite d'alimentation en chaleur comprend un tuyau d'entrée d'eau utilisateur (1), un tuyau de retour d'eau utilisateur (2) et un tuyau de dérivation (3). L'appareil de commande comprend un dispositif de commande (6), un capteur de température relié au dispositif de commande (6) et un clapet motorisé (5) et une pompe à eau (4) agencés sur la conduite d'alimentation en chaleur. Les premières extrémités du tuyau d'entrée d'eau utilisateur (1) et du tuyau de retour d'eau utilisateur (2) sont raccordées à une unité d'alimentation en chaleur (S1), et les secondes extrémités sont raccordées à un utilisateur final (S2). Une fréquence de réglage à laquelle le dispositif de commande (6) règle un degré d'ouverture du clapet motorisé (5) est supérieure ou égale à une fréquence de réglage à laquelle le dispositif de commande (6) règle une vitesse de rotation de la pompe à eau (4). Le dispositif de commande (6) détermine si une différence de température entre la température d'entrée d'eau du tuyau d'entrée d'eau utilisateur (1) et la température de retour d'eau du tuyau de retour d'eau utilisateur (2) détectée par le capteur de température se trouve dans une plage de différence de température prédéfinie ; si la différence de température est supérieure à une limite supérieure de la plage de différence de température prédéfinie, le dispositif de commande augmente la vitesse de rotation de la pompe à eau ; et la différence de température est inférieure à une limite inférieure de la plage de différence de température prédéfinie, le dispositif de commande diminue la vitesse de rotation de la pompe à eau.
PCT/CN2012/084777 2012-11-16 2012-11-16 Ensemble à équilibre thermique et procédé de commande et appareil de commande associés WO2014075303A1 (fr)

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CN201280076473.9A CN104769364B (zh) 2012-11-16 2012-11-16 热平衡机组及其控制方法与控制装置
PCT/CN2012/084777 WO2014075303A1 (fr) 2012-11-16 2012-11-16 Ensemble à équilibre thermique et procédé de commande et appareil de commande associés
CN201320727574.XU CN203586393U (zh) 2012-11-16 2013-11-15 热平衡机组及其控制装置
CN201320727677.6U CN203586394U (zh) 2012-11-16 2013-11-15 热平衡机组及其控制装置

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CN114992707A (zh) * 2019-05-06 2022-09-02 萨姆森控制设备（中国）有限公司 一种智能热力混水装置及控制方法

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CN109737485A (zh) * 2018-12-15 2019-05-10 阿诗丹顿燃具有限公司 燃气式热水炉采暖系统及其控制装置和方法
CN112254352A (zh) * 2020-09-18 2021-01-22 华帝股份有限公司 一种用于壁挂炉的水泵排气方法
CN112286131B (zh) * 2020-10-23 2022-09-20 中国电子系统工程第二建设有限公司 一种mau控制系统及电子洁净厂房mau高精度控制方法
CN113606782B (zh) * 2021-07-30 2022-10-28 宁波奥克斯电气股份有限公司 一种热泵机组的变频控制方法、装置、存储介质及热泵机组
CN116839091B (zh) * 2023-05-15 2024-01-19 山东和同信息科技股份有限公司 一种基于深度学习的换热站自动控制参数设置方法

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