CN109764406A - A kind of heat-exchange system and its implementation with PID constant temperature algorithm - Google Patents

A kind of heat-exchange system and its implementation with PID constant temperature algorithm Download PDF

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Publication number
CN109764406A
CN109764406A CN201910047294.6A CN201910047294A CN109764406A CN 109764406 A CN109764406 A CN 109764406A CN 201910047294 A CN201910047294 A CN 201910047294A CN 109764406 A CN109764406 A CN 109764406A
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China
Prior art keywords
temperature
water
hot water
heat
constant temperature
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CN201910047294.6A
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Chinese (zh)
Inventor
曾根根
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Nanjing Soho Electronics Technology Co Ltd
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Nanjing Soho Electronics Technology Co Ltd
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Priority to CN201910047294.6A priority Critical patent/CN109764406A/en
Publication of CN109764406A publication Critical patent/CN109764406A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a kind of heat-exchange systems and its implementation with PID constant temperature algorithm, cycle controller internal PID constant temperature algorithm in system, electronic flow temperature two-in-one sensor is installed at the hot water feed water inlet of plate heat exchanger, cycle controller adjusts the revolving speed of the adjustable speed circulating pump of heat-exchange system according to the input data, achievees the purpose that hot water supply water temperature is constant.The method to exchange heat are as follows: real-time measurement current use water flow and hot water effluent's temperature, cycle controller is calculated the deviation of practical water outlet and ideal hot water temperature, is adjusted the revolving speed of variable frequency pump in real time using PID constant temperature algorithm, it allows leaving water temperature to reach ideal set temperature, and keeps hot water constant temperature.Invention increases a controllers with PID constant temperature algorithm, and using sensor, constantly the changes in flow rate of detection water spot and hot water effluent's temperature, controller adjustable plate change the revolving speed of the circulating pump of water tank side, achieve the purpose that hot water supply water temperature is constant.

Description

A kind of heat-exchange system and its implementation with PID constant temperature algorithm
Technical field
The present invention relates to a kind of heat-exchange system and its implementation more particularly to a kind of heat exchange with PID constant temperature algorithm System and its implementation.
Background technique
The plate of the prior art change be in heat exchange module no PID constant temperature algorithm controller, also without temperature flow two close One sensor, only plate are changed to be existed as following drawbacks with simple start and stop logic controller, such legacy system: 1, being supplied water in hot water In the case that flow changes, hot water temperature has fluctuation;2, in the case where water tank temperature difference, supply water temperature also has temperature Degree fluctuation, can not constant leaving water temperature.
Summary of the invention
The purpose of the present invention is to provide a kind of heat-exchange systems and its implementation with PID constant temperature algorithm, solve existing There is shortcoming existing for technology.
The present invention adopts the following technical scheme that realization:
A kind of heat-exchange system with PID constant temperature algorithm, which is characterized in that there is a cycle controller and one in system A plate heat exchanger, the cycle controller internal PID constant temperature algorithm, cycle controller are connected with an adjustable speed circulating pump, One two-in-one sensor of electronic flow temperature, the loop control are installed at the hot water feed water inlet of the plate heat exchanger Device adjusts the revolving speed of the adjustable speed circulating pump of heat-exchange system according to the input data, reaches the constant mesh of hot water supply water temperature 's.
Further, the cycle controller is connected with cooling water inlet and water container backwater mouth.
Further, check valve is provided between the water container backwater mouth and the cycle controller.
A method of it is exchanged heat using PID constant temperature algorithm, which is characterized in that this method comprises the following steps:
A, the two-in-one sensor real-time measurement of electronic flow temperature current use water flow and hot water effluent's temperature, number Cycle controller is transferred to according to timely;
B, cycle controller calculates the deviation of practical water outlet and ideal hot water temperature according to the ideal leaving water temperature of setting;
C, cycle controller adjusts the revolving speed of variable frequency pump in real time, leaving water temperature is allowed to reach according to the pid algorithm inside controller To ideal set temperature, and keep hot water constant temperature.
Further, the ideal hot water temperature is 30-85 degrees Celsius.
The method have the benefit that: the present invention changes in heat exchange module in original easy plane, increases a tool There is the controller of PID constant temperature algorithm, and a two-in-one sensor of flow temperature, the sensing are installed in the hot water feed water inlet that plate changes Device can the at every moment changes in flow rate of detection water spot and hot water effluent's temperature, data are transferred to controller, controller root Carry out the revolving speed that adjustable plate changes the circulating pump of water tank side according to the data of input, achievees the purpose that hot water supply water temperature is constant.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is system construction drawing of the invention.
Fig. 3 is one of power chart of pump works.
Fig. 4 is the two of the power chart of pump works.
Fig. 5 is the three of the power chart of pump works.
Fig. 6 is the temperature schematic diagram of heat-exchange system.
Specific embodiment
By the following description of the embodiment, the public understanding present invention will more be facilitated, but can't should be by Shen Given specific embodiment of asking someone is considered as the limitation to technical solution of the present invention, the definition of any pair of component or technical characteristic Be changed and/or to overall structure make form and immaterial transformation is regarded as defined by technical solution of the present invention Protection scope.
Description of symbols: the two-in-one sensor 3 of plate heat exchanger 1, cycle controller 2, electronic flow temperature, adjustable Fast circulating pump 4, water tank import 5, hot water outlet 6, cooling water inlet 7, check valve 8, water container backwater mouth 9
Heat-exchange system with PID constant temperature algorithm as shown in the figure, heat-exchange system contain water tank, calculate with PID constant temperature The hot water heat exchange pumping plant of method controller, tap, the purpose of the present embodiment is exactly in water tank temperature, the feelings changed with water flow Under condition, the stable case of hot water supply water temperature.There is a cycle controller 2 and a plate heat exchanger 1, circulation control in system 2 internal PID constant temperature algorithm of device processed, cycle controller 2 are connected with cooling water inlet 7 and water container backwater mouth 9, water container backwater mouth 9 with Check valve 8 is provided between cycle controller 2, cycle controller 2 is connected with an adjustable speed circulating pump 4, plate heat exchanger 1 The two-in-one sensor 3 of one electronic flow temperature, 2 basis of cycle controller are installed at hot water outlet 6 (hot water feed water inlet) The data of input adjust the revolving speed of the adjustable speed circulating pump 4 of heat-exchange system, achieve the purpose that hot water supply water temperature is constant.Electronics The effect of the two-in-one sensor 3 of formula flow temperature is detection currently with the instantaneous flow of water and hot water temperature, and data are passed in time It is defeated by controller.The effect of adjustable speed circulating pump 2 is adjusted the speed automatically according to the signal of controller output, and hot water temperature is protected Hold constant (such as 45 degree).Check valve 8: the aqueous reflux for preventing water tank side from recycling.The effect of cycle controller 2 is according to electronic type The signal that the two-in-one sensor 3 of flow temperature inputs, and the hot water temperature of setting, reach the constant mesh of hot water supply water temperature 's.In the present embodiment, heat-exchange system is divided into water tank side circulation and hot water side circulation, and the interface of water tank side circulation is respectively water tank The interface of import 5 and water container backwater mouth 9, hot water side circulation is respectively cooling water inlet 7 and hot water outlet 6.
The present invention includes the following steps: that A, electronic flow temperature two are closed using the method that PID constant temperature algorithm exchanges heat Data, are transferred to cycle controller by one sensor real-time measurement current use water flow and hot water effluent's temperature in time;B, it follows Ring controller calculates practical water outlet and ideal according to the ideal leaving water temperature (ideal hot water temperature is 30-85 degree Celsius) set The deviation of hot water temperature;C, cycle controller adjusts the revolving speed of variable frequency pump in real time, concedes according to the pid algorithm inside controller Coolant-temperature gage reaches ideal set temperature, and keeps hot water constant temperature.
The working principle of the invention: when with water, the two-in-one sensor of flow temperature mounted in hot water side is surveyed in real time Data, are transferred to controller, controller goes out according to the ideal of setting by amount current use water flow and hot water effluent's temperature in time Coolant-temperature gage (30-85 degree is adjustable) calculates the deviation of practical water outlet and ideal hot water temperature, calculates further according to the PID inside controller Method adjusts the revolving speed of variable frequency pump in real time, allows leaving water temperature to reach ideal set temperature, and keep hot water constant temperature.
The temperature for influencing hot water effluent has following factor: 1, water tank temperature;2, tap water inflow temperature;3, water flow is used Amount;4, the revolving speed of circulating pump.
If water tank temperature is higher, tap water temperature is higher, smaller with water flow, and circulation revolution speed is higher, then hot water Leaving water temperature will be higher, on the contrary then lower.If the heat exchange pumping plant does not have PID constant temperature algorithm to control hot water effluent's temperature, that Hot water effluent's temperature will change as these influence factors change, and influence users'comfort.If increasing PID constant temperature Algorithm controls hot water effluent's temperature, then hot water effluent's temperature would not be affected by these factors, at every moment adjustment is recycled The revolving speed of pump is kept constant to reach hot water effluent's temperature.
Fig. 3 to Fig. 5 discloses the plate heat exchanger of 50kw power in different tap water temperatures, different setting hot water temperatures When (40 degree, 45 degree and 48 degree), different water tank temperatures can satisfy the maximum relational graph with water flow.
Fig. 6 is to detect obtained data drawing list by experiment in 4 minutes, this Experimental Background data:
The temperature for just having started water tank is 70 degree, and with the progress of test, the water temperature of water tank is constantly to drop to 67 degrees Celsius. During the test, artificially specially tap is opened big or turns down, to change with water flow, flow was in 38L/ minutes or so waves Dynamic, tap water inflow temperature remains 2 degree or so.
Experimental result: no matter the temperature of water tank is always for downward trend, or with water flow for fluctuation status, hot water Leaving water temperature remains 46 degree of constant temperature, fluctuates very little.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, Those skilled in the art can make various corresponding changes and modifications according to the present invention, but these it is corresponding change and Deformation all should fall within the scope of protection of the appended claims of the present invention.

Claims (5)

1. a kind of heat-exchange system with PID constant temperature algorithm, which is characterized in that have a cycle controller and one in system Plate heat exchanger, the cycle controller internal PID constant temperature algorithm, cycle controller are connected with an adjustable speed circulating pump, institute It states and the two-in-one sensor of electronic flow temperature, the cycle controller is installed at the hot water feed water inlet of plate heat exchanger According to the input data come adjust heat-exchange system adjustable speed circulating pump revolving speed.
2. the heat-exchange system according to claim 1 with PID constant temperature algorithm, which is characterized in that the cycle controller It is connected with cooling water inlet and water container backwater mouth.
3. the heat-exchange system according to claim 1 with PID constant temperature algorithm, which is characterized in that in the water container backwater Check valve is provided between mouth and the cycle controller.
4. a kind of method to be exchanged heat using PID constant temperature algorithm, which is characterized in that this method comprises the following steps:
A, the two-in-one sensor real-time measurement of electronic flow temperature current use water flow and hot water effluent's temperature, data and When be transferred to cycle controller;
B, cycle controller calculates the deviation of practical water outlet and ideal hot water temperature according to the ideal leaving water temperature of setting;
C, cycle controller adjusts the revolving speed of variable frequency pump in real time, leaving water temperature is allowed to reach reason according to the pid algorithm inside controller The set temperature thought, and keep hot water constant temperature.
5. the method according to claim 4 to be exchanged heat using PID constant temperature algorithm, which is characterized in that the ideal heat Coolant-temperature gage is 30-85 degrees Celsius.
CN201910047294.6A 2019-01-17 2019-01-17 A kind of heat-exchange system and its implementation with PID constant temperature algorithm Pending CN109764406A (en)

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CN201910047294.6A CN109764406A (en) 2019-01-17 2019-01-17 A kind of heat-exchange system and its implementation with PID constant temperature algorithm

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201972194U (en) * 2010-12-15 2011-09-14 广州星辰热能科技有限公司 Intelligent frequency-variable constant-pressure water supply system
CN103267362A (en) * 2013-06-17 2013-08-28 江苏天舒电器有限公司 Constant temperature flow control method for heat pump water heater and double-system unit using same
CN104101106A (en) * 2014-08-01 2014-10-15 江苏天舒电器有限公司 Directly-heated type double-source heat pump water heater and control method thereof
CN104848355A (en) * 2014-10-28 2015-08-19 青岛万力科技有限公司 Domestic hot water heat exchange unit
EP3364116A1 (en) * 2017-02-16 2018-08-22 Mitsubishi Electric R&D Centre Europe B.V. Method for controlling a heat pump and heat pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201972194U (en) * 2010-12-15 2011-09-14 广州星辰热能科技有限公司 Intelligent frequency-variable constant-pressure water supply system
CN103267362A (en) * 2013-06-17 2013-08-28 江苏天舒电器有限公司 Constant temperature flow control method for heat pump water heater and double-system unit using same
CN104101106A (en) * 2014-08-01 2014-10-15 江苏天舒电器有限公司 Directly-heated type double-source heat pump water heater and control method thereof
CN104848355A (en) * 2014-10-28 2015-08-19 青岛万力科技有限公司 Domestic hot water heat exchange unit
EP3364116A1 (en) * 2017-02-16 2018-08-22 Mitsubishi Electric R&D Centre Europe B.V. Method for controlling a heat pump and heat pump

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Application publication date: 20190517