CN113251576A - Frequency adjusting method and system for refrigerating water pump of heat recovery unit - Google Patents

Frequency adjusting method and system for refrigerating water pump of heat recovery unit Download PDF

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Publication number
CN113251576A
CN113251576A CN202110539149.7A CN202110539149A CN113251576A CN 113251576 A CN113251576 A CN 113251576A CN 202110539149 A CN202110539149 A CN 202110539149A CN 113251576 A CN113251576 A CN 113251576A
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frequency
value
frequency value
water pump
hot water
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CN113251576B (en
Inventor
蔡小兵
龙超晖
张炳文
王鹏宇
黄�俊
胡彧
刘福海
王德祥
石瑛
何亮
杨欣
李文剑
杨天
罗世勇
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Guizhou Huitong Huacheng Co ltd
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Guizhou Huitong Huacheng Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to a frequency regulation method and a system of a chilled water pump of a heat recovery unit, wherein the method calculates and judges the operation parameters by collecting the operation parameters of the chilled water pump, and when the tail end cold quantity demand is unchanged but the heat quantity demand is increased, the frequency of the chilled water pump of the heat recovery unit can be only increased, so that the tail end heat quantity demand is met and the excess cold quantity output by a medium temperature unit is also avoided; when the tail end cold quantity requirement is reduced but the heat quantity requirement is kept unchanged, the frequency of a freezing water pump of the heat recovery unit can be kept unchanged, and therefore waste of cold quantity is reduced while heat quantity supply is guaranteed.

Description

Frequency adjusting method and system for refrigerating water pump of heat recovery unit
Technical Field
The invention relates to the technical field of air conditioners, in particular to a frequency adjusting method and a frequency adjusting system for a refrigerating water pump of a heat recovery unit.
Background
The central air-conditioning cold water system of an electronic factory generally comprises two parts, namely low-temperature water and medium-temperature water. The medium-temperature cold water of the medium-temperature water system is simultaneously provided by the medium-temperature unit and the medium-temperature heat recovery unit, and the medium-temperature heat recovery unit is usually responsible for supplying hot water while providing the medium-temperature cold water. Because the cold water pipelines of the medium temperature heat recovery unit and the medium temperature heat recovery unit are connected in parallel, the prior proposal adopts the same frequency mode for the frequencies of the freezing water pumps of the medium temperature heat recovery unit and the medium temperature heat recovery unit (or the former follows the latter, or the latter follows the former, or the low frequency follows the high frequency). The same frequency mode has the following problems in the application process:
1. when the terminal cold volume demand is unchangeable, the heat demand increases, in order to satisfy the supply of heat, must can promote the operating frequency of heat recovery unit refrigerated water pump, owing to adopt the same frequency mode, must lead to the refrigerated water pump frequency of medium temperature unit to promote to it is extravagant to cause cold volume.
2. When the terminal cold volume demand is reduced and the heat volume demand is unchanged, if the cold volume output is reduced, the necessary heat volume output due to the same frequency is also reduced, and the heat volume output is kept unchanged for heat supply, so that the cold volume waste is caused.
Disclosure of Invention
The invention aims to provide a frequency adjusting method and a frequency adjusting system for a chilled water pump of a heat recovery unit, which adopt a frequency difference mechanism to reduce the waste of cold quantity.
In order to achieve the purpose, the invention provides the following scheme:
a frequency adjusting method for a refrigeration water pump of a heat recovery unit comprises the following steps:
collecting the hot water supply temperature, a first frequency value and a second frequency value of the chilled water pump at the current moment when a preset frequency value is taken as a working frequency; the first frequency value is an instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is an instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump;
if the first frequency value is smaller than the second frequency value, adjusting the input frequency value of the chilled water pump of the intermediate temperature heat recovery unit according to the first frequency value;
and if the first frequency value is greater than or equal to the second frequency value, determining a tail end heat demand state according to the hot water supply temperature, an upper limit set value of the hot water supply temperature and a lower limit set value of the hot water supply temperature, and adjusting the input frequency value of the refrigeration water pump of the intermediate temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, a maximum frequency difference set value and a frequency change stepping set value.
Preferably, adjusting the input frequency value of the chilled water pump of the medium-temperature heat recovery unit according to the first frequency value comprises:
determining the first frequency value as the input frequency value.
Preferably, the determining the end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature, and the lower limit set value of the hot water supply temperature includes:
determining the terminal heat demand state as a demand reduction state when the hot water supply water temperature is greater than or equal to the upper limit set value;
when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to the lower limit set value, determining the tail end heat demand state as a demand satisfaction state;
and when the hot water supply temperature is lower than the lower limit set value, determining the tail end heat demand state as a demand increase state.
Preferably, adjusting the input frequency value of the chilled water pump of the medium temperature heat recovery unit according to the terminal heat demand state, the second frequency value, the first frequency value, the maximum frequency difference setting value, and the frequency change step setting value includes:
determining the first frequency value as the input frequency value when the terminal heat demand state is the demand reduction state and the difference between the second frequency value and the frequency change stepping set value is less than the first frequency value;
and when the terminal heat demand state is the demand increase state and the sum of the second frequency value and the frequency change stepping set value is greater than the sum of the first frequency value and the maximum frequency difference set value, determining the sum of the first frequency value and the maximum frequency difference set value as the input frequency value.
Preferably, the method further comprises the following steps:
and when the terminal heat demand state is the demand satisfying state, acquiring the hot water supply temperature, the first frequency value and the second frequency value at the next moment.
Preferably, when the frozen water pump is collected with a preset frequency value as an operating frequency, after the hot water supply temperature, the first frequency value and the second frequency value at the current moment, the method further includes:
recording the frequency adjustment time; the frequency adjustment time is greater than or equal to the hot water circulation set period.
A frequency adjustment system for a heat recovery unit chilled water pump, comprising:
the acquisition module is used for acquiring the hot water supply temperature, the first frequency value and the second frequency value of the chilled water pump at the current moment when the preset frequency value is taken as the working frequency; the first frequency value is an instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is an instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump;
the first adjusting module is used for adjusting the input frequency value of the chilled water pump of the medium-temperature heat recovery unit according to the first frequency value if the first frequency value is smaller than the second frequency value;
and the second adjusting module is used for determining a tail end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature and the lower limit set value of the hot water supply temperature if the first frequency value is greater than or equal to the second frequency value, and adjusting the input frequency value of the refrigeration water pump of the medium-temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, the maximum frequency difference set value and the frequency change stepping set value.
Preferably, the first determining module comprises:
a first determining unit configured to determine the first frequency value as the input frequency value.
Preferably, the second adjusting module comprises:
a first demand determination unit for determining the terminal heat demand state as a demand reduction state when the hot water supply water temperature is greater than or equal to an upper limit set value of the hot water supply water temperature;
a second demand determining unit, configured to determine the terminal heat demand state as a demand-satisfying state when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to a lower limit set value;
a third demand determination unit for determining the terminal heat demand state as a demand increase state when the hot water supply temperature is less than the lower limit set value.
Preferably, the second adjusting module further comprises:
a third determining unit, configured to determine the first frequency value as the input frequency value when the terminal heat demand state is the demand reduction state and a difference between the second frequency value and a frequency change step setting value is smaller than the first frequency value;
a fourth determining unit, configured to determine, as the input frequency value, a sum of the first frequency value and the maximum frequency difference setting value when the end heat demand state is the demand increase state and the sum of the second frequency value and the frequency change step setting value is greater than a sum of the first frequency value and the maximum frequency difference setting value.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a frequency adjusting method and a system for a chilled water pump of a heat recovery unit, wherein the method calculates and judges the operation parameters by acquiring the operation parameters of the chilled water pump, and when the tail end cold quantity demand is unchanged but the heat quantity demand is increased, the frequency of the chilled water pump of the heat recovery unit can be only increased, so that the tail end heat quantity demand is met and the excess cold quantity output by a medium temperature unit is also avoided; when the tail end cold quantity requirement is reduced but the heat quantity requirement is kept unchanged, the frequency of a freezing water pump of the heat recovery unit can be kept unchanged, and therefore waste of cold quantity is reduced while heat quantity supply is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a method for adjusting the frequency of a chilled water pump of a heat recovery unit according to the present invention;
fig. 2 is a block diagram of a frequency adjustment system of a chilled water pump of a heat recovery unit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a frequency adjusting method and a frequency adjusting system for a chilled water pump of a heat recovery unit, which adopt a frequency difference mechanism to reduce the waste of cold quantity.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flowchart of a frequency adjustment method of a chilled water pump of a heat recovery unit according to the present invention, and as shown in fig. 1, the frequency adjustment method of the chilled water pump of the heat recovery unit according to the present invention includes:
step 100: collecting the hot water supply temperature, a first frequency value and a second frequency value of the chilled water pump at the current moment when a preset frequency value is taken as a working frequency; the first frequency value is the instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is the instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump.
Step 200: and if the first frequency value is smaller than the second frequency value, adjusting the input frequency value of the chilled water pump of the intermediate temperature heat recovery unit according to the first frequency value.
Step 201: and if the first frequency value is greater than or equal to the second frequency value, determining a tail end heat demand state according to the hot water supply temperature, an upper limit set value of the hot water supply temperature and a lower limit set value of the hot water supply temperature, and adjusting the input frequency value of the refrigeration water pump of the intermediate temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, a maximum frequency difference set value and a frequency change stepping set value.
Optionally, the parameters preset manually in the invention include: lower limit set value T of hot water supply temperatureUnder the supply of heatUpper limit set value T of hot water supply temperatureHeat supply deviceMaximum allowable frequency difference F between the chilled water pump of the medium temperature unit and the chilled water pump of the medium temperature heat recovery unitFrequency differenceFrequency adjustment timing t, frequency change step set value FFrequency stepPeriod t of hot water circulationThermal cycle(ii) a Frequency set value F of chilled water pump of medium-temperature heat recovery unitSetting upAnd taking the current running frequency value of the chilled water pump of the medium temperature unit. In this embodiment, FSetting upNamely the input frequency value of the chilled water pump of the medium temperature heat recovery unit.
Specifically, the freezing water pump comprises a medium temperature unit freezing water pump and a medium temperature heat recovery unit freezing water pump.
In this embodiment, the collected data includes a plurality of sampled calculated parameters, such as hot water supply temperature THeat supplyFrequency value F of chilled water pump of medium temperature unitInFrequency value F of refrigeration water pump of medium temperature heat recovery unitChinese traditional medicine。FInI.e. said first frequency value, FChinese traditional medicineI.e. the second frequency value.
Preferably, adjusting the input frequency value of the chilled water pump of the medium-temperature heat recovery unit according to the first frequency value comprises:
determining the first frequency value as the input frequency value.
Preferably, the determining the end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature, and the lower limit set value of the hot water supply temperature includes:
and when the hot water supply temperature is greater than or equal to the upper limit set value, determining the tail end heat demand state as a demand reduction state.
And when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to the lower limit set value, determining the tail end heat demand state as a demand satisfaction state.
And when the hot water supply temperature is lower than the lower limit set value, determining the tail end heat demand state as a demand increase state.
Preferably, adjusting the input frequency value of the chilled water pump of the medium temperature heat recovery unit according to the terminal heat demand state, the second frequency value, the first frequency value, the maximum frequency difference setting value, and the frequency change step setting value includes:
and when the terminal heat demand state is the demand reduction state and the difference between the second frequency value and the frequency change stepping set value is smaller than the first frequency value, determining the first frequency value as the input frequency value.
And when the terminal heat demand state is the demand increase state and the sum of the second frequency value and the frequency change stepping set value is greater than the sum of the first frequency value and the maximum frequency difference set value, determining the sum of the first frequency value and the maximum frequency difference set value as the input frequency value.
Preferably, the method further comprises the following steps:
and when the terminal heat demand state is the demand satisfying state, acquiring the hot water supply temperature, the first frequency value and the second frequency value at the next moment.
Preferably, when the frozen water pump is collected with a preset frequency value as an operating frequency, after the hot water supply temperature, the first frequency value and the second frequency value at the current moment, the method further includes:
recording the frequency adjustment time; the frequency adjustment time is greater than or equal to the hot water circulation set period.
The process steps of the invention are as follows:
s1: the parameters preset manually comprise: lower limit set value T of hot water supply temperatureUnder the supply of heatUpper limit set value T of hot water supply temperatureHeat supply deviceMaximum allowable frequency difference F between the chilled water pump of the medium temperature unit and the chilled water pump of the medium temperature heat recovery unitFrequency differenceFrequency change step set value FFrequency stepPeriod t of hot water circulationThermal cycle(ii) a Frequency set value F of chilled water pump of medium-temperature heat recovery unitSetting upAnd taking the current running frequency value of the chilled water pump of the medium temperature unit.
S2: sampling and calculating parameters: hot water supply temperature THeat supplyFrequency value F of chilled water pump of medium temperature unitInFrequency value F of refrigeration water pump of medium temperature heat recovery unitChinese traditional medicine(ii) a Starting to adjust the frequency and time t, when t is more than tThermal cycleThen, the process proceeds to S3.
S3: judgment of FInAnd FChinese traditional medicineIf F isChinese traditional medicine<FInThen calculate FSetting up＝FIn(namely the frequency of the refrigeration water pump of the medium temperature heat recovery unit follows the frequency of the refrigeration water pump of the medium temperature unit), and then the operation returns to S2; if FChinese traditional medicine≥FInThen, the process proceeds to S4.
S4: if THeat supply≥THeat supply device(i.e., end heat demand is reduced), proceed to S5; if THeat supply≥TUnder the supply of heatAnd THeat supply<THeat supply device(i.e., capable of meeting the end heat requirement), then return to S2; if THeat supply<TUnder the supply of heat(i.e., end heat demand is increased), S6 is entered.
S5: calculating FSetting up＝(FChinese traditional medicine—FFrequency step) If F isSetting up<FInThen take FSetting up＝FInAnd then returns to S2.
S6: calculating FSetting up＝(FChinese traditional medicine+FFrequency step) If F isSetting up>(FIn+FFrequency difference) Then take FSetting up＝(FIn+FFrequency difference) And then returns to S2.
Fig. 2 is a block connection diagram of a frequency adjustment system of a chilled water pump of a heat recovery unit according to the present invention, and as shown in fig. 2, the frequency adjustment system of the chilled water pump of the heat recovery unit according to the present invention includes:
the acquisition module is used for acquiring the hot water supply temperature, the first frequency value and the second frequency value of the chilled water pump at the current moment when the preset frequency value is taken as the working frequency; the first frequency value is the instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is the instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump.
And the first adjusting module is used for adjusting the input frequency value of the chilled water pump of the intermediate temperature heat recovery unit according to the first frequency value if the first frequency value is smaller than the second frequency value.
And the second adjusting module is used for determining a tail end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature and the lower limit set value of the hot water supply temperature if the first frequency value is greater than or equal to the second frequency value, and adjusting the input frequency value of the refrigeration water pump of the medium-temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, the maximum frequency difference set value and the frequency change stepping set value.
Preferably, the first determining module comprises:
a first determining unit configured to determine the first frequency value as the input frequency value.
Preferably, the second adjusting module comprises:
a first demand determination unit for determining the terminal heat demand state as a demand reduction state when the hot water supply water temperature is greater than or equal to an upper limit set value of the hot water supply water temperature.
And the second requirement determining unit is used for determining the tail end heat requirement state as a requirement satisfying state when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to the lower limit set value.
A third demand determination unit for determining the terminal heat demand state as a demand increase state when the hot water supply temperature is less than the lower limit set value.
Preferably, the second adjusting module further comprises:
a third determining unit, configured to determine the first frequency value as the input frequency value when the end heat demand state is the demand reduction state and a difference between the second frequency value and a frequency change step setting value is smaller than the first frequency value.
A fourth determining unit, configured to determine, as the input frequency value, a sum of the first frequency value and the maximum frequency difference setting value when the end heat demand state is the demand increase state and the sum of the second frequency value and the frequency change step setting value is greater than a sum of the first frequency value and the maximum frequency difference setting value.
The invention has the following beneficial effects:
1. when the tail end cold quantity requirement is not changed but the heat quantity requirement is increased, the invention can only improve the frequency of the freezing water pump of the heat recovery unit, and can meet the tail end heat quantity requirement and simultaneously avoid the excess cold quantity output by the intermediate temperature unit.
2. When the tail end cold demand is reduced but the heat demand is kept unchanged, the invention can keep the frequency of the chilled water pump of the heat recovery unit unchanged, thereby ensuring the supply of tail end heat.
3. The invention adopts a frequency difference mechanism, the refrigeration water pump of the intermediate temperature unit is automatically adjusted according to the requirement of the cold quantity at the tail end, and the reference frequency difference of the refrigeration water pump of the heat recovery unit is automatically adjusted according to the heat quantity, thereby reducing the waste of the cold quantity and avoiding the problem of the water supply safety on parallel pipelines.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. A frequency adjusting method of a refrigeration water pump of a heat recovery unit is characterized by comprising the following steps:
collecting the hot water supply temperature, a first frequency value and a second frequency value of the chilled water pump at the current moment when a preset frequency value is taken as a working frequency; the first frequency value is an instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is an instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump;
if the first frequency value is smaller than the second frequency value, adjusting the input frequency value of the chilled water pump of the intermediate temperature heat recovery unit according to the first frequency value;
and if the first frequency value is greater than or equal to the second frequency value, determining a tail end heat demand state according to the hot water supply temperature, an upper limit set value of the hot water supply temperature and a lower limit set value of the hot water supply temperature, and adjusting the input frequency value of the refrigeration water pump of the intermediate temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, a maximum frequency difference set value and a frequency change stepping set value.
2. The method for adjusting the frequency of the chiller chilled water pump according to claim 1, wherein the adjusting the input frequency value of the chiller chilled water pump according to the first frequency value comprises:
determining the first frequency value as the input frequency value.
3. The frequency adjustment method for the chilled water pump of the heat recovery unit according to claim 1, wherein determining the end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature and the lower limit set value of the hot water supply temperature comprises:
determining the terminal heat demand state as a demand reduction state when the hot water supply water temperature is greater than or equal to the upper limit set value;
when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to the lower limit set value, determining the tail end heat demand state as a demand satisfaction state;
and when the hot water supply temperature is lower than the lower limit set value, determining the tail end heat demand state as a demand increase state.
4. The method for adjusting the frequency of the chilled water pump of the heat recovery unit according to claim 3, wherein the adjusting the input frequency value of the chilled water pump of the medium temperature heat recovery unit according to the terminal heat demand state, the second frequency value, the first frequency value, the maximum frequency difference setting value and the frequency change step setting value comprises:
determining the first frequency value as the input frequency value when the terminal heat demand state is the demand reduction state and the difference between the second frequency value and the frequency change stepping set value is less than the first frequency value;
and when the terminal heat demand state is the demand increase state and the sum of the second frequency value and the frequency change stepping set value is greater than the sum of the first frequency value and the maximum frequency difference set value, determining the sum of the first frequency value and the maximum frequency difference set value as the input frequency value.
5. The frequency adjustment method for the chilled water pump of the heat recovery unit according to claim 3, further comprising:
and when the terminal heat demand state is the demand satisfying state, acquiring the hot water supply temperature, the first frequency value and the second frequency value at the next moment.
6. The method for adjusting the frequency of the chilled water pump of the heat recovery unit according to claim 1, wherein when the operating frequency of the chilled water pump is preset, after the hot water supply temperature, the first frequency value and the second frequency value at the current moment, the method further comprises:
recording the frequency adjustment time; the frequency adjustment time is greater than or equal to the hot water circulation set period.
7. The utility model provides a frequency control system of heat recovery unit frozen water pump which characterized in that includes:
the acquisition module is used for acquiring the hot water supply temperature, the first frequency value and the second frequency value of the chilled water pump at the current moment when the preset frequency value is taken as the working frequency; the first frequency value is an instantaneous frequency value of the intermediate temperature unit frozen water pump, and the second frequency value is an instantaneous frequency value of the intermediate temperature heat recovery unit frozen water pump;
the first adjusting module is used for adjusting the input frequency value of the chilled water pump of the medium-temperature heat recovery unit according to the first frequency value if the first frequency value is smaller than the second frequency value;
and the second adjusting module is used for determining a tail end heat demand state according to the hot water supply temperature, the upper limit set value of the hot water supply temperature and the lower limit set value of the hot water supply temperature if the first frequency value is greater than or equal to the second frequency value, and adjusting the input frequency value of the refrigeration water pump of the medium-temperature heat recovery unit according to the tail end heat demand state, the second frequency value, the first frequency value, the maximum frequency difference set value and the frequency change stepping set value.
8. The heat recovery unit chilled water pump frequency adjustment system of claim 7, wherein the first determination module comprises:
a first determining unit configured to determine the first frequency value as the input frequency value.
9. The heat recovery unit chilled water pump frequency adjustment system of claim 7, wherein the second adjustment module comprises:
a first demand determination unit for determining the terminal heat demand state as a demand reduction state when the hot water supply water temperature is greater than or equal to an upper limit set value of the hot water supply water temperature;
a second demand determining unit, configured to determine the terminal heat demand state as a demand-satisfying state when the hot water supply temperature is less than the upper limit set value and the hot water supply temperature is greater than or equal to a lower limit set value;
a third demand determination unit for determining the terminal heat demand state as a demand increase state when the hot water supply temperature is less than the lower limit set value.
10. The heat recovery unit chilled water pump frequency adjustment system of claim 9, wherein the second adjustment module further comprises:
a third determining unit, configured to determine the first frequency value as the input frequency value when the terminal heat demand state is the demand reduction state and a difference between the second frequency value and a frequency change step setting value is smaller than the first frequency value;
a fourth determining unit, configured to determine, as the input frequency value, a sum of the first frequency value and the maximum frequency difference setting value when the end heat demand state is the demand increase state and the sum of the second frequency value and the frequency change step setting value is greater than a sum of the first frequency value and the maximum frequency difference setting value.
CN202110539149.7A 2021-05-18 2021-05-18 Frequency adjusting method and system for refrigerating water pump of heat recovery unit Active CN113251576B (en)

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CN202110539149.7A CN113251576B (en) 2021-05-18 2021-05-18 Frequency adjusting method and system for refrigerating water pump of heat recovery unit

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CN113251576B CN113251576B (en) 2022-02-08

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2771717Y (en) * 2005-02-25 2006-04-12 贵州华城楼宇科技有限公司 After-heat recovering system controlling device of passive central air-conditioner cooling water
CN201138034Y (en) * 2007-12-13 2008-10-22 张茂勇 Central air-conditioning heat pump device simultaneously cooling and preparing hot water and boiled water for living
CN101504225A (en) * 2009-03-06 2009-08-12 上海源知机电科技有限公司 Refrigeration heat-reclaiming device and method for preparing high-temperature hot water
CN102052740A (en) * 2009-11-10 2011-05-11 上海瀚艺冷冻机械有限公司 Variable frequency heat recovery water chilling unit
KR20120048395A (en) * 2010-11-05 2012-05-15 엘지전자 주식회사 Speed heating apparatus with air conditioner and control process of the same
CN104374117A (en) * 2014-11-21 2015-02-25 珠海格力电器股份有限公司 Water chilling unit and control method
CN105135746A (en) * 2015-09-18 2015-12-09 北京百度网讯科技有限公司 Chilled water waste heat reuse system and method for data center
CN105757834A (en) * 2016-02-29 2016-07-13 武汉华星光电技术有限公司 Medium-temperature ice water supply system
CN111059738A (en) * 2019-12-06 2020-04-24 南京卓恒科技有限公司 Heat recovery side control system of heat recovery centrifugal unit
CN111288676A (en) * 2020-02-14 2020-06-16 特灵空调系统(中国)有限公司 Water chilling unit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2771717Y (en) * 2005-02-25 2006-04-12 贵州华城楼宇科技有限公司 After-heat recovering system controlling device of passive central air-conditioner cooling water
CN201138034Y (en) * 2007-12-13 2008-10-22 张茂勇 Central air-conditioning heat pump device simultaneously cooling and preparing hot water and boiled water for living
CN101504225A (en) * 2009-03-06 2009-08-12 上海源知机电科技有限公司 Refrigeration heat-reclaiming device and method for preparing high-temperature hot water
CN102052740A (en) * 2009-11-10 2011-05-11 上海瀚艺冷冻机械有限公司 Variable frequency heat recovery water chilling unit
KR20120048395A (en) * 2010-11-05 2012-05-15 엘지전자 주식회사 Speed heating apparatus with air conditioner and control process of the same
CN104374117A (en) * 2014-11-21 2015-02-25 珠海格力电器股份有限公司 Water chilling unit and control method
CN105135746A (en) * 2015-09-18 2015-12-09 北京百度网讯科技有限公司 Chilled water waste heat reuse system and method for data center
CN105757834A (en) * 2016-02-29 2016-07-13 武汉华星光电技术有限公司 Medium-temperature ice water supply system
CN111059738A (en) * 2019-12-06 2020-04-24 南京卓恒科技有限公司 Heat recovery side control system of heat recovery centrifugal unit
CN111288676A (en) * 2020-02-14 2020-06-16 特灵空调系统(中国)有限公司 Water chilling unit

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