CN110986139A - Heat pump modular heating system and variable-frequency water pump control method - Google Patents
Heat pump modular heating system and variable-frequency water pump control method Download PDFInfo
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- CN110986139A CN110986139A CN201911166148.1A CN201911166148A CN110986139A CN 110986139 A CN110986139 A CN 110986139A CN 201911166148 A CN201911166148 A CN 201911166148A CN 110986139 A CN110986139 A CN 110986139A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
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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
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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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
- F24D3/18—Hot-water central heating systems using heat pumps
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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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- 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)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of heating, in particular to a heat pump modular heating system and a variable frequency water pump control method, wherein the heat pump modular heating system comprises at least one unit, a first pipeline, a second pipeline and a plurality of heating devices communicated between the first pipeline and the second pipeline; and the first pipeline is also provided with a variable frequency water pump and a third pipeline for introducing cold water. According to the heat pump modular heating system, the units are modularized, when the heat pump modular heating system is used, a proper number of units can be started according to the specific use area, the adjustment is convenient and quick, the heat pump modular heating system can flexibly adapt to different scenes, the universality is high, and the requirements of different users are met. On the other hand, when the variable frequency water pump is used, the operating frequency of the variable frequency water pump can be adjusted according to the average water inlet temperature of the unit and the average water outlet temperature of the operating unit, so that the energy-saving control of the unit output to the load requirements of the target users is realized, the effect of saving electricity is achieved, and the waste of resources is avoided.
Description
Technical Field
The invention relates to the technical field of heating, in particular to a heat pump modular heating system and a variable frequency water pump control method.
Background
Heating, namely, the proper temperature in the building is obtained through the design of the building and a cold-proof heating device. The northern coal-to-electricity clean energy heating project solves the problem of household coal-fired heating, and simultaneously drives the heat pump heating requirements of villas and small commercial places. The villa type household heating water machine takes large-sized houses, high-end villa houses and small commercial places as service objects, is not influenced by a coal-to-electricity policy, not only can continuous outbreak be generated in the traditional coal-to-electricity market in the north, but also the demand potential of northwest areas, inner Mongolia and northeast provinces can be continuously released in the future. At present, because of different areas of large-dwelling houses, high-end villas and small-sized commercial places, the respective heating demands are different, if the large-dwelling houses, the high-end villas and the small-sized commercial places are heated by the same power, the heating demands on the large-area places are possibly insufficient, and the demands on the small-area places are excessive, so that the user experience is influenced, and the resource waste is also caused. Therefore, a heating system capable of flexibly meeting the heating requirements of users is urgently needed, so that the users can obtain better experience.
Disclosure of Invention
In order to solve the problems, the invention provides a heat pump modular heating system and a frequency conversion water pump control method applying the heat pump modular heating system.
The invention is realized by adopting the following scheme:
a heat pump modular heating system comprises at least one unit, a first pipeline, a second pipeline and a plurality of heating devices communicated between the first pipeline and the second pipeline; the first pipeline is also provided with a variable frequency water pump and a third pipeline for introducing cold water; the water inlet pipe of the unit is communicated with the first pipeline, and the water outlet pipe of the unit is communicated with the second pipeline; the water inlet pipe is provided with a first temperature sensing bulb, and the water outlet pipe is provided with a second temperature sensing bulb.
Further, still be provided with first check valve, first filter and first relief pressure valve on the first pipeline, just first check valve, frequency conversion water pump, first filter and relief pressure valve set gradually.
Further, the third pipeline is communicated between the pressure reducing valve and the heating device.
Furthermore, a switch valve, a second filter and a second check valve are sequentially arranged between the pipe orifice of the third pipeline and the first pipeline.
Further, a second pressure reducing valve is arranged between the heating device and the second pipeline.
The control method of the variable-frequency water pump is characterized in that the heat pump modular heating system is applied, and the running frequency of the variable-frequency water pump is correspondingly adjusted through the average water inlet temperature of the unit and the average water return temperature of the running unit, so that the running frequency of the variable-frequency water pump is increased, reduced or kept at the current state.
The heat pump modular heating system of claim 8, wherein the corresponding adjustment of the operating frequency of the variable frequency water pump comprises the following detailed steps:
step 6, the average outlet water temperature T of the unit is usedAverage outAverage water inlet temperature T of unitAverage advance intoThe difference value between the two is used as a control target to adjust the running frequency of the variable frequency water pump, and the running time T of the variable frequency water pump is the highest frequency running time3After the initial operation, according to time T4Adjustments are made for the adjustment period.
Further, in step 2, when the water inlet thermal bulb fails, the measured temperature of the water inlet thermal bulb is an invalid value, and when the water outlet thermal bulb fails, the measured temperature of the water thermal bulb is an invalid value.
Further, in the step 2, T is calculatedAverage advance intoIn the process, when only one unit is provided, the water inlet temperature of the unit is directly taken; when only two units are provided, the average value is directly taken, and when the number of the units is more than 2, the average value is taken
Further, in the step 2, the average outlet water temperature T of the running unit is calculatedAverage outIn the process, when only one unit is provided, the outlet water temperature of the unit is directly taken; when the number of the units is more than or equal to 2 and the units are in the cooling mode,
when the number of the units is more than or equal to 2 and the units are in the heating mode
Compared with the prior art, the invention has the following beneficial effects:
according to the heat pump modular heating system, the units are modularized, when the heat pump modular heating system is used, a proper number of units can be started according to the specific use area, the adjustment is convenient and quick, the heat pump modular heating system can flexibly adapt to different scenes, the universality is high, and the requirements of different users are met. On the other hand, when the variable frequency water pump is used, the operating frequency of the variable frequency water pump can be adjusted according to the average water inlet temperature of the unit and the average water outlet temperature of the operating unit, so that the energy-saving control of the unit output to the load requirements of the target users is realized, the effect of saving electricity is achieved, and the waste of resources is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump modular heating system provided by the invention.
The figure includes:
the water heater comprises a unit 1, a water inlet pipe 11, a water outlet pipe 12, a first temperature sensing bulb 13, a second temperature sensing bulb 14, a first pipeline 2, a variable frequency water pump 21, a first check valve 22, a first filter 23, a first pressure reducing valve 24, a second pipeline 3, a heating device 4, a second pressure reducing valve 41, a third pipeline 5, a switch valve 51, a second filter 52 and a second check valve 53.
Detailed Description
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1, the present invention provides a heat pump modular heating system, which includes at least one unit 1, a first pipeline 2, a second pipeline 3, and a plurality of heating devices 4 connected between the first pipeline 2 and the second pipeline 3; the first pipeline 2 is also provided with a variable frequency water pump 21 and a third pipeline 5 for introducing cold water, and the third pipeline 5 is communicated between the pressure reducing valve and the heating device 4. The unit 1 all is provided with inlet tube 11 and outlet pipe 12, and the inlet tube 11 and the first pipeline 2 intercommunication of unit 1, and the outlet pipe 12 and the second pipeline 3 intercommunication of unit 1, also when being provided with a plurality of units 1, parallelly connected between a plurality of units 1. In this embodiment, the number of the units 1 is at most 8. Water in the unit 1 enters the first pipeline 2 through the water inlet pipe 11, flows through the heating device 4, enters the water outlet pipe 12 from the second pipeline 3, and flows back to the unit 1.
A first temperature sensing bulb 13 is arranged on the water inlet pipe 11, and a second temperature sensing bulb 14 is arranged on the water outlet pipe 12. Each unit 1 is provided with an independent compressor, a fan and the like besides the first temperature sensing bulb 13 and the second temperature sensing bulb 14, that is, each unit 1 forms a module, and the modules are interconnected through CAN bus information.
The first pipeline 2 is further provided with a first check valve 22, a first filter 23 and a first pressure reducing valve 24, and the first check valve 22, the variable frequency water pump 21, the first filter 23 and the pressure reducing valve are sequentially arranged. A switch valve 51, a second filter 52 and a second check valve 53 are sequentially arranged between the nozzle of the third pipeline 5 and the first pipeline 2. A second pressure reducing valve 41 is arranged between the heating device 4 and the second pipeline 3. In this embodiment, the heating device 4 is a radiator, and the first filter 23 and the second filter 52 are both Y-shaped filters.
The invention also provides a control method of the variable frequency water pump, which applies the heat pump modular heating system and correspondingly adjusts the operating frequency of the variable frequency water pump through the average water inlet temperature of the unit and the average water return temperature of the operating unit, so that the operating frequency of the variable frequency water pump is increased, reduced or kept at the current state.
The heat pump modular heating system of claim 8, wherein the corresponding adjustment of the operating frequency of the variable frequency water pump comprises the following detailed steps:
step 6, the average outlet water temperature T of the unit is usedAverage outAverage water inlet temperature T of unitAverage advance intoThe difference value is used as a control target to adjust the running frequency of the variable frequency water pump.
In step 2, when the water inlet thermal bulb fails, the measured temperature of the water inlet thermal bulb is an invalid value, and when the water outlet thermal bulb fails, the measured temperature of the water thermal bulb is an invalid value.
In the step 2, T is calculatedAverage advance intoIn the process, when only one unit is provided, the water inlet temperature of the unit is directly taken; when only two units are provided, the average value is directly taken, and when the number of the units is more than 2, the average value is taken
In the step 2, the average outlet water temperature T of the running unit is calculatedAverage outIn the process, when only one unit is provided, the outlet water temperature of the unit is directly taken; when the number of the units is more than or equal to 2 and the units are in the cooling mode,
when the number of the units is more than or equal to 2 and the units are in the heating mode
In the step 5, adjusting the operating frequency of the variable frequency water pump includes the following substeps:
s1, when the variable frequency water pump is initially started and operated, initially operating the variable frequency water pump for an operation time T at the highest gear frequency1After the initial operation, according to time T2Is a regulation cycle;
s2, when detecting △ T1-1℃≤TAverage advance into-TAverage out≤△T1Then executing S3 when detecting TAverage advance into-TAverage out≥△T1Executing S4 when the temperature is +1 ℃, and detecting TAverage advance into-TAverage out≤△T1S5 at-2 ℃;
s3, keeping the current rotating speed of the variable frequency water pump unchanged;
s4, the variable frequency water pump is shifted to a first gear on the basis of the current gear, and if the next regulation period still meets the condition, the variable frequency water pump is shifted to a higher gear until the highest gear is reached;
and S5, adjusting the variable frequency water pump to a gear on the basis of the current gear, and if the next adjusting period still meets the condition, adjusting the variable frequency water pump to a lower gear until the lowest gear.
Wherein, T is1、T2Are all 10min, said △ T1Is 5 ℃.
In step 6, the adjusting the operating frequency of the variable frequency water pump comprises the following substeps:
a1, when the variable frequency water pump is initially started to operate, the initial operation is performed with the operation time T of the highest gear frequency3After the initial operation, according to time T4Is a regulation cycle;
a2, when detecting △ T2-1℃≤TAverage out-TAverage advance into≤△T2When the test is T, A3 is executedAverage out-TAverage advance into≥△T2Executing A4 when +1 deg.C, detecting TAverage out-TAverage advance into≤△T2-2 ℃ then a 5;
a3, keeping the current rotating speed of the variable frequency water pump unchanged;
a4, shifting the variable frequency water pump to a first gear on the basis of the current gear, and shifting the variable frequency water pump to a higher gear until the highest gear in the next regulation period if the condition is still met;
a5, the frequency conversion water pump is shifted down one gear based on the current gear, if the next regulation period still meets the condition, the frequency conversion water pump is shifted down one gear again until the lowest gear.
Wherein, T is3、T4Are all 10min, said △ T2Is 5 ℃.
In specific implementation, the heat pump modular heating system CAN be connected to a control module (such as an electronic computer and the like), and the acquired data CAN be transmitted to the control module through the CAN bus for calculation and receiving a command returned by the control module.
According to the heat pump modular heating system, the units are modularized, when the heat pump modular heating system is used, a proper number of units can be started according to the specific use area, the adjustment is convenient and quick, the heat pump modular heating system can flexibly adapt to different scenes, the universality is high, and the requirements of different users are met. On the other hand, when the variable frequency water pump is used, the operating frequency of the variable frequency water pump can be adjusted according to the average water inlet temperature of the unit and the average water outlet temperature of the operating unit, so that the energy-saving control of the unit output to the load requirements of the target users is realized, the effect of saving electricity is achieved, and the waste of resources is avoided.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.
Claims (10)
1. A heat pump modular heating system is characterized by comprising at least one unit, a first pipeline, a second pipeline and a plurality of heating devices communicated between the first pipeline and the second pipeline; the first pipeline is also provided with a variable frequency water pump and a third pipeline for introducing cold water; the water inlet pipe of the unit is communicated with the first pipeline, and the water outlet pipe of the unit is communicated with the second pipeline; the water inlet pipe is provided with a first temperature sensing bulb, and the water outlet pipe is provided with a second temperature sensing bulb.
2. The heat pump modular heating system of claim 1, wherein the first pipeline is further provided with a first check valve, a first filter and a first pressure reducing valve, and the first check valve, the variable frequency water pump, the first filter and the pressure reducing valve are sequentially arranged.
3. The heat pump modular heating system of claim 2, wherein the third pipeline is in communication between a pressure reducing valve and a heating device.
4. The heat pump modular heating system of claim 1, wherein a switch valve, a second filter and a second check valve are sequentially arranged between the pipe orifice of the third pipeline and the first pipeline.
5. The heat pump modular heating system of claim 1, wherein a second pressure reducing valve is disposed between the heating unit and the second pipeline.
6. A control method of a variable frequency water pump is characterized in that the heat pump modular heating system of any one of claims 1 to 7 is applied, and the operation frequency of the variable frequency water pump is correspondingly adjusted through the average inlet water temperature of the unit and the average return water temperature of the operating unit, so that the operation frequency of the variable frequency water pump is increased, reduced or kept at the current state.
7. The heat pump modular heating system of claim 6, wherein the corresponding adjustment of the operating frequency of the variable frequency water pump comprises the following detailed steps:
step 1, determining the number of units according to the heating area;
step 2, starting the unit, selecting the operation mode of the unit as a refrigerating mode or a heating mode, and acquiring the temperature T of the water inlet temperature sensing bulb of each module unit in real time in the operation process of the unitN is toRunning module machine water outlet temperature sensing bulb temperature TN out operation；
Step 3, calculating the average water inlet temperature T of the unitAverage advance intoCalculating the average water outlet temperature T of the running unitAverage out；
Step 4, judging the current working mode, if the current working mode is the refrigerating mode, turning to step 5, and if the current working mode is the heating mode, turning to step 6;
step 5, the average water inlet temperature T of the unit is usedAverage advance intoAverage water outlet temperature T of unitAverage outThe difference value between the two is used as a control target to adjust the running frequency of the variable frequency water pump, and the variable frequency water pump runs for a time T at the highest gear frequency1After the initial operation, according to time T2Adjusting for an adjustment period;
step 6, the average outlet water temperature T of the unit is usedAverage outAverage water inlet temperature T of unitAverage advance intoThe difference value between the two is used as a control target to adjust the running frequency of the variable frequency water pump, and the running time T of the variable frequency water pump is the highest frequency running time3After the initial operation, according to time T4Adjustments are made for the adjustment period.
8. The heat pump modular heating system of claim 7, wherein in the step 2, the temperature of the inlet water bulb is determined to be an invalid value when the inlet water bulb fails, and the temperature of the outlet water bulb is determined to be an invalid value when the outlet water bulb fails.
9. The heat pump modular heating system of claim 9, wherein in step 2, T is calculatedAverage advance intoIn the process, when only one unit is provided, the water inlet temperature of the unit is directly taken; when there are only twoWhen the number of the units is more than 2, the average value is directly obtained
10. The heat pump modular heating system of claim 7, wherein in the step 2, the average outlet water temperature T of the running unit is calculatedAverage outIn the process, when only one unit is provided, the outlet water temperature of the unit is directly taken; when the number of the units is more than or equal to 2 and the units are in the cooling mode,
when the number of the units is more than or equal to 2 and the units are in the heating mode
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| CN201911166148.1A CN110986139A (en) | 2019-11-25 | 2019-11-25 | Heat pump modular heating system and variable-frequency water pump control method |
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| CN201911166148.1A CN110986139A (en) | 2019-11-25 | 2019-11-25 | Heat pump modular heating system and variable-frequency water pump control method |
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| CN114135979A (en) * | 2021-11-12 | 2022-03-04 | 珠海格力电器股份有限公司 | Energy-saving operation method and device of air conditioning unit, control equipment and air conditioning unit |
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| CN114135979A (en) * | 2021-11-12 | 2022-03-04 | 珠海格力电器股份有限公司 | Energy-saving operation method and device of air conditioning unit, control equipment and air conditioning unit |
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Application publication date: 20200410 |