CN108548283B - Method and device for adjusting supply water temperature of chilled water of air conditioner room of hospital - Google Patents
Method and device for adjusting supply water temperature of chilled water of air conditioner room of hospital Download PDFInfo
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- CN108548283B CN108548283B CN201810175357.1A CN201810175357A CN108548283B CN 108548283 B CN108548283 B CN 108548283B CN 201810175357 A CN201810175357 A CN 201810175357A CN 108548283 B CN108548283 B CN 108548283B
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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Abstract
The invention relates to a method and a device for adjusting the supply water temperature of chilled water in a hospital air conditioner room, wherein the method comprises the following steps: when a refrigeration host of the air conditioner room normally operates, acquiring first opening degrees of all electric valves in a combined type air cabinet at the tail end of an air conditioner at the K-th moment, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees; if the number N1 of the electric valves meets a first preset condition, adjusting down a first operating frequency of the chilled water pump according to a set frequency; if the number N1 of the electric valves meets a second preset condition, keeping the first operating frequency of the chilled water pump; if the number N1 of the electric valves meets the third preset condition, the first operating frequency of the chilled water pump is increased according to the set frequency. According to the invention, the operation frequency of the chilled water pump is adjusted in real time by monitoring the opening of the electric valve of the combined air cabinet at the tail end of the air conditioner in real time, and the real-time temperature adjustment of chilled water is combined, so that the purpose of effectively adjusting the water supply temperature of the chilled water is achieved, and the cooling and cold supply efficiency of frozen aquatic products in the air conditioner room of the hospital is improved.
Description
Technical Field
The invention relates to the field of air conditioner rooms, in particular to a method and a device for adjusting the supply water temperature of chilled water of a hospital air conditioner room.
Background
The water supply temperature of the chilled water of the traditional central air-conditioning system refrigerating host usually adopts a fixed value setting mode, namely the water supply temperature of the chilled water is set in advance before the refrigerating host starts to operate, and the chilled water is supplied with cold at the fixed water supply temperature when the refrigerating host starts to operate. Although this approach is simple to operate, the energy efficiency of the main machine that cannot be cooled is relatively low.
For some specific buildings, such as hospitals, the hospital is in a partial load section of a cold load most of the time in a year, so that the energy efficiency of the refrigeration host machine in the partial load section cannot be effectively improved by adopting the temperature setting mode, and conversely, the energy efficiency of the refrigeration host machine can be reduced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a device for adjusting the supply water temperature of the chilled water in the air conditioner room of the hospital, aiming at the above defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for adjusting the supply water temperature of chilled water in a hospital air conditioner room is constructed, and comprises the following steps:
when a refrigeration host of an air conditioner room normally operates, acquiring first opening degrees of all electric valves in a combined type air cabinet at the tail end of an air conditioner at the K-th moment, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees;
if the number N1 of the electric valves meets a first preset condition, adjusting down a first operating frequency of the chilled water pump according to a set frequency;
if the number N1 of the electric valves meets a second preset condition, keeping the first operating frequency of the chilled water pump and the water supply temperature of the chilled water;
and if the quantity N1 of the electric valves meets a third preset condition, increasing the first operating frequency of the chilled water pump according to the set frequency.
Preferably, if the number N1 of the electrically operated valves satisfies a first preset condition, the step of turning down the first operating frequency of the chilled water pump according to the set frequency comprises the following steps:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a first preset condition, adjusting the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency;
when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number N2 of the electrically operated valves still meets the first preset condition, the water supply temperature of the chilled water is increased according to the set temperature.
Preferably, if the number N1 of the electrically operated valves satisfies a first preset condition, the step of adjusting the operating frequency of the chilled water pump according to the set frequency includes:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump;
if the number N2 of the electric valves meets a third preset condition, increasing a second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches an upper limit frequency;
when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still meets the third preset condition, the water supply temperature of the chilled water is reduced according to the set temperature.
Preferably, if the number N1 of the electrically operated valves satisfies a third preset condition, the step of increasing the first operating frequency of the chilled water pump according to the set frequency includes:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a first preset condition, adjusting the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency;
when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number of the electrically operated valves N2 meets a first preset condition, the water supply temperature of the chilled water is increased according to a set temperature.
Preferably, if the number N1 of the electrically operated valves satisfies a third preset condition, the step of increasing the first operating frequency of the chilled water pump according to the set frequency includes:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump;
if the number N2 of the electric valves meets a third preset condition, increasing a second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches an upper limit frequency;
when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still meets the third preset condition, the water supply temperature of the chilled water is reduced according to the set temperature.
The invention also provides a chilled water supply temperature adjusting device for the air conditioner room of the hospital, which comprises:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring first opening degrees of all electric valves in a combined air cabinet at the tail end of an air conditioner at the K-th moment when a refrigeration host of an air conditioner room operates normally, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees;
the first execution unit is used for reducing the first operating frequency of the chilled water pump according to the set frequency if the number N1 of the electric valves meets a first preset condition;
the second execution unit is used for keeping the first operating frequency of the chilled water pump and the water supply temperature of the chilled water if the quantity N1 of the electric valves meets a second preset condition;
and the third execution unit is used for increasing the first operating frequency of the chilled water pump according to the set frequency if the number N1 of the electric valves meets a third preset condition.
Preferably, the method further comprises the following steps:
the first determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the first frequency modulation module is used for reducing the second running frequency of the chilled water pump at the K + t moment according to the set frequency until the running frequency of the chilled water pump reaches the lower limit frequency if the number N2 of the electric valves meets a first preset condition;
and the first temperature regulating module is used for increasing the water supply temperature of the chilled water according to the set temperature if the quantity N2 of the electric valves still meets a first preset condition when the operating frequency of the chilled water pump reaches the lower limit frequency.
Preferably, the method further comprises the following steps:
the second determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the first keeping module is used for keeping the water supply temperature of the chilled water at the K + t moment and the second running frequency of the chilled water pump if the quantity N2 of the electric valves meets a second preset condition;
the second frequency modulation module is used for increasing the second operating frequency of the chilled water pump according to the set frequency if the number N2 of the electric valves meets a third preset condition until the operating frequency of the chilled water pump reaches an upper limit frequency;
and the second temperature regulating module is used for reducing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves still meets a third preset condition when the operating frequency of the chilled water pump reaches the upper limit frequency.
Preferably, the method further comprises the following steps:
the third determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the third frequency modulation module is used for reducing the second running frequency of the chilled water pump at the K + t moment according to the set frequency until the running frequency of the chilled water pump reaches the lower limit frequency if the number N2 of the electric valves meets a first preset condition;
and the third temperature regulating module is used for increasing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves meets a first preset condition when the operating frequency of the chilled water pump reaches the lower limit frequency.
Preferably, the method further comprises the following steps:
the fourth determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the second maintaining module is used for maintaining the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump if the quantity N2 of the electric valves meets a second preset condition;
the fourth frequency modulation module is used for increasing the second operating frequency of the chilled water pump according to the set frequency if the number N2 of the electric valves meets a third preset condition until the operating frequency of the chilled water pump reaches an upper limit frequency;
and the fourth temperature regulating module is used for reducing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves still meets a third preset condition when the operating frequency of the chilled water pump reaches the upper limit frequency.
The method for adjusting the chilled water supply temperature of the air conditioner room of the hospital has the following beneficial effects: according to the invention, the opening of the electric valve of the combined type air cabinet at the tail end of the air conditioner is monitored in real time, the operating frequency of the chilled water pump is adjusted in real time, and the adjustment is carried out in combination with the real-time temperature of the chilled water, so that the purpose of effectively adjusting the water supply temperature of the chilled water is achieved, and the cooling and cold supply energy efficiency of the chilled water in the air conditioner room of the hospital is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow chart of a first embodiment of a chilled water supply temperature adjusting method for a hospital air conditioner room according to the present invention;
FIG. 2 is a schematic flow chart of a method for adjusting the temperature of chilled water supplied to a hospital air conditioning room according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for adjusting the temperature of chilled water supplied to a hospital air conditioning room according to a third embodiment of the present invention;
FIG. 4 is a functional block diagram of a first embodiment of a chilled water supply temperature regulating device for a hospital air conditioner room according to the present invention;
FIG. 5 is a functional block diagram of a chilled water supply temperature regulating device for a hospital air conditioner room according to a second embodiment of the present invention;
fig. 6 is a functional block diagram of a chilled water supply temperature regulating device for a hospital air conditioner room according to a third embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for adjusting the temperature of chilled water supplied to a hospital air conditioner room according to a first embodiment of the present invention. In this embodiment, the method comprises the steps of:
and S10, when the refrigeration host of the air conditioner room normally operates, acquiring first opening degrees of all electric valves in the combined air cabinet at the K-th moment and at the tail end of the air conditioner, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees.
It can be understood that the kth moment is any moment in the normal operation process of the refrigeration host machine in the air conditioner room.
In this embodiment, all the electrically operated valves in the combined type air cabinet at the end of the air conditioner are adjustable electrically operated valves, and the adjustable range of the opening degree of each electrically operated valve is 0% to 100%. The real-time opening degree of the electric valve can be monitored and collected in real time through a controller in the air conditioning system. Specifically, all electric valves in the terminal combination formula wind cabinet of air conditioner all carry out real-time data communication with the controller, when arbitrary electric valve's aperture changed, all can feed back an electric signal to the controller, and the controller is received and is handled the conversion to this electric signal and obtain this electric valve's aperture.
Specifically, at the K moment, the opening conditions of all electric valves corresponding to the tail-end combined type air cabinet of the air conditioner are detected, the opening of each electric valve is recorded, and then the number of the electric valves with the opening larger than the threshold value is counted. Alternatively, the opening threshold of the electrically operated valve of the present invention may be set to 95%.
It can be understood that the first opening is an array, that is, the first opening is a real-time opening of all the electrically operated valves of the combined type air cabinet at the end of the air conditioner at the kth time. For example, if the air conditioner end combined type air cabinet has three electrically operated valves, and the opening degrees of the three electrically operated valves at the K-th time are respectively 80%, 85% and 90%, the first opening degree is { 80%, 85% and 90% }.
And step S20, if the number N1 of the electric valves meets a first preset condition, adjusting the first running frequency of the chilled water pump down according to the set frequency.
The first operation frequency is the real-time operation frequency of the chilled water pump at the K time. The set frequency may be 10% of the current operating frequency, i.e. 10% of the current operating frequency as the adjustment amplitude.
In this embodiment, the first preset condition is: at the K time, the opening degree of all electric valves of the air conditioner tail end combined type air cabinet does not exceed 95%, namely at the K time, the opening degree of all valves of the air conditioner tail end combined type air cabinet is lower than 95%. Therefore, at the K-th time, if the number N1 of the electric valves is less than 1, that is, N1 is equal to 0, the first operating frequency of the chilled water pump is adjusted to be low according to the set frequency.
Specifically, at the K-th time when N1 is equal to 0, the first operating frequency is adjusted down by 10% of the first operating frequency to obtain the second operating frequency. Namely, it is
Wherein f is1 ch,pumpRepresenting a first operating frequency, f2 ch,pumpRepresenting the second operating frequency. N1KThe number of the electrically operated valves of which the first opening degree is larger than the threshold value at the K-th time is indicated.
According to the invention, at the K moment, when the opening of all valves of the combined air cabinet at the tail end of the air conditioner is determined to be not more than 95%, the operation frequency of the chilled water pump is immediately adjusted and controlled, so that the chilled water supply and the cooling capacity are rapidly controlled, the response speed to the indoor comfort is accelerated, and the air conditioner is more suitable for the situation of high-peak building load fluctuation, for example, in the morning or evening, the indoor comfort can be better adjusted, and the comfort of indoor personnel is improved.
And step S30, if the number N1 of the electric valves meets a second preset condition, keeping the first operating frequency of the chilled water pump and the water supply temperature of the chilled water.
The water supply temperature of the chilled water is the water supply temperature of the chilled water at the Kth moment, wherein the water supply temperature of the chilled water can be acquired by data acquisition through a water temperature sensor arranged in a chilled water supply pipe.
In this embodiment, the second preset condition is: at time K, the opening of all the electrically operated valves of the air conditioning end combined type air cabinet is only 95% or more, i.e., N1 is equal to 1. That is, if only one of the electrically operated valves has an opening degree exceeding 95% at the K-th time, the current operating frequency (the first operating frequency) of the chilled water pump and the current supply water temperature of the chilled water need only be maintained without any adjustment of the chilled water pump and the supply water temperature of the chilled water.
And step S40, if the number N1 of the electric valves meets a third preset condition, increasing the first operating frequency of the chilled water pump according to the set frequency.
In this embodiment, the third preset condition is; at the K time, the opening degree of all electric valves of the air conditioner tail end combined type air cabinet is 2 or more than 2, namely N1 is greater than or equal to 2. When N1 is greater than or equal to 2, the first operating frequency of the chilled water pump is adjusted to be higher according to the set frequency, and the second operating frequency is obtained, wherein the second operating frequency is 1.1 of the first operating frequency. Namely, it is
It is understood that the second operation frequency is not a fixed value, which varies with different adjustments of the operation frequency of the chilled water pump, as can be seen from steps S20 and S30.
At the K moment, when the opening degrees of all the valves of the combined air cabinet at the tail end of the air conditioner are determined to be 2 or more than 2 and exceed 95%, the operation frequency of the chilled water pump is immediately adjusted and controlled, the chilled water supply quantity and the cooling quantity are rapidly controlled, the response speed to the indoor comfort is accelerated, and the air conditioner is more suitable for the situation of high-peak building load fluctuation, such as in the morning or in the evening, the indoor comfort can be better adjusted, and the comfort of indoor personnel is improved.
As shown in fig. 2, a schematic flow chart of a method for adjusting the temperature of chilled water supplied to a hospital air conditioning room according to a second embodiment of the present invention is shown. The present embodiment further includes step S211, step S212, and step S213 after step S20 on the basis of the first embodiment.
Specifically, the method comprises the following steps:
step S211, after the refrigeration host runs for a preset time period t:
and detecting the second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees are larger than the threshold value in the combined type air cabinet at the tail end of the air conditioner.
Because at the K moment, after adjusting the first operating frequency of frozen water pump, can not reach required effect immediately, consequently, need to continue monitoring the running state of refrigeration host computer after adjusting, promptly when the first operating frequency of frozen water pump is transferred down according to setting for the frequency, after the operation of refrigeration host computer presets time quantum t, continue to detect the aperture condition of all electric valve in the terminal combination formula wind cabinet of air conditioner.
Specifically, second opening degrees of all electric valves in the combined type air cabinet at the tail end of the air conditioner are collected at the K + t moment, the electric valves with the opening degrees larger than the threshold value are selected from the second opening degrees, and the number of the electric valves is counted, namely the number N2 of the electric valves with the second opening degrees larger than the threshold value is counted.
And S212, if the number N2 of the electric valves meets a first preset condition, reducing the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency.
In this embodiment, the lower limit frequency of the chilled water pump is typically 35 Hz.
Specifically, when the number N2 of the electric valves with the opening degrees larger than the threshold value is equal to 0 at the K + t moment, the second operation frequency of the chilled water pump is reduced according to the set frequency until the operation frequency of the chilled water pump reaches 35 Hz. When the operation frequency of the chilled water pump reaches 35Hz, step S213 is performed.
Step S213, when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number N2 of the electrically operated valves still satisfies the first preset condition, increasing the water supply temperature of the chilled water according to the set temperature.
When the operating frequency of the chilled water pump reaches the lower limit frequency, the opening conditions of all the electric valves are continuously monitored, and if the opening of none of the electric valves exceeds 95%, the water supply temperature of the chilled water is correspondingly increased according to the set temperature. Namely, it is
Wherein, Tk+t supA set value T representing the supply water temperature of the chilled water at the K + T-th timek supAnd represents the actual measured value of the chilled water supply water temperature at the K time.
Further, after step S20, step S221, step S222, and step S223 are also included.
Step S221, after the refrigeration host runs for a preset time period t:
and detecting the second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees are larger than the threshold value in the combined type air cabinet at the tail end of the air conditioner.
And step S222, if the quantity N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump.
And step S223, if the number N2 of the electric valves meets a third preset condition, increasing the second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches the upper limit frequency.
In this embodiment, the upper frequency of the chilled water pump is typically 50 Hz.
Specifically, when the number of the electric valves N2 with the opening degree larger than the threshold value is 2 or more than 2 at the K + t moment, the second operation frequency of the chilled water pump is increased according to the set frequency until the operation frequency of the chilled water pump reaches 50 Hz. When the operation frequency of the chilled water pump reaches 50Hz, step S224 is performed.
And S224, when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electric valves still meets the third preset condition, the water supply temperature of the chilled water is reduced according to the set temperature.
When the operating frequency of the chilled water pump reaches the upper limit frequency, the opening conditions of all the electric valves are continuously monitored, and if the opening of 2 or more than 2 electric valves exceeds 95%, the water supply temperature of the chilled water is increased according to the set temperature. Namely, it is
Wherein f isk+t ch,pumpRepresents the operating frequency, f, of the chilled water pump at the K + t timek ch,pumpAnd represents the running frequency of the chilled water pump at the K time.
As shown in fig. 3, a schematic flow chart of a method for adjusting the supply water temperature of chilled water in a hospital air conditioner room according to a third embodiment of the present invention is shown. The present embodiment is based on the first embodiment, and further includes step S411, step S412, and step S413 after step S40.
Specifically, the method comprises the following steps:
step S411, after the refrigeration host runs for a preset time period t:
and detecting second opening degrees of all the electric valves at the K + t moment, and determining the quantity N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value.
Specifically, second opening degrees of all electric valves in the combined type air cabinet at the tail end of the air conditioner are collected at the K + t moment, the electric valves with the opening degrees larger than the threshold value are selected from the second opening degrees, and the number of the electric valves is counted, namely the number N2 of the electric valves with the second opening degrees larger than the threshold value is counted.
And step S412, if the number N2 of the electric valves meets a first preset condition, reducing the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency.
In this embodiment, the lower limit frequency of the chilled water pump is typically 35 Hz.
Specifically, when the number N2 of the electric valves with the opening degrees larger than the threshold value is equal to 0 at the K + t moment, the second operation frequency of the chilled water pump is reduced according to the set frequency until the operation frequency of the chilled water pump reaches 35 Hz. When the operation frequency of the chilled water pump reaches 35Hz, step S213 is performed.
And step S413, when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number N2 of the electrically operated valves meets a first preset condition, increasing the water supply temperature of the chilled water according to the set temperature.
When the operating frequency of the chilled water pump reaches the lower limit frequency, the opening conditions of all the electric valves are continuously monitored, and if the opening of none of the electric valves exceeds 95%, the water supply temperature of the chilled water is increased according to the set temperature. Namely, it is
Wherein, Tk+t supA set value T representing the supply water temperature of the chilled water at the K + T-th timek supAnd represents the actual measured value of the chilled water supply water temperature at the K time.
Further, after step S40, step S421, step S422, and step S423 are also included.
Step S421, after the refrigeration host runs for a preset time period t:
and detecting second opening degrees of all the electric valves at the K + t moment, and determining the quantity N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value.
And S422, if the quantity N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump.
And step 423, if the number N2 of the electric valves meets a third preset condition, increasing the second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches the upper limit frequency.
In this embodiment, the upper frequency of the chilled water pump is typically 50 Hz.
Specifically, when the number of the electric valves N2 with the opening degree larger than the threshold value is 2 or more than 2 at the K + t moment, the second operation frequency of the chilled water pump is increased according to the set frequency until the operation frequency of the chilled water pump reaches 50 Hz. When the operation frequency of the chilled water pump reaches 50Hz, step S424 is performed.
Step S424, when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still satisfies the third preset condition, the water supply temperature of the chilled water is decreased according to the set temperature.
When the operating frequency of the chilled water pump reaches the upper limit frequency, the opening conditions of all the electric valves are continuously monitored, and if the opening of 2 or more than 2 electric valves exceeds 95%, the water supply temperature of the chilled water is reduced according to the set temperature. Namely, it is
Wherein f isk+t ch,pumpRepresents the operating frequency, f, of the chilled water pump at the K + t timek ch,pumpAnd represents the running frequency of the chilled water pump at the K time.
As shown in fig. 4, a schematic structural diagram of a first embodiment of a chilled water supply temperature regulating device for a hospital air conditioner room provided by the present invention is shown, and the supply water temperature regulating device of the embodiment comprises:
the obtaining unit 10 is configured to obtain a first opening degree of all the electric valves in the combined type air cabinet at the end of the air conditioner at the K-th moment when a refrigeration host of the air conditioner room operates normally, and determine the number N1 of the electric valves larger than a threshold value according to the first opening degree.
The first execution unit 20 is configured to, if the number N1 of the electrically operated valves satisfies a first preset condition, turn down the first operating frequency of the chilled water pump according to the set frequency.
And the second execution unit 40 is used for maintaining the first operating frequency of the chilled water pump and the water supply temperature of the chilled water if the number of the electric valves N1 meets a second preset condition.
And the third execution unit 30 is configured to increase the first operating frequency of the chilled water pump according to the set frequency if the number N1 of the electrically operated valves meets a third preset condition.
As shown in fig. 5, a functional block diagram of a second embodiment of a chilled water supply temperature regulating device for a hospital air conditioner room according to the present invention is further provided, where the supply water temperature regulating device further includes, on the basis of the first embodiment:
the first determining module 211 is configured to detect a second opening degree of all the electrically operated valves at the K + t-th time, and determine the number N2 of the electrically operated valves, where the second opening degrees of all the electrically operated valves in the air conditioner end combined type air cabinet are greater than a threshold value.
The first frequency modulation module 212 is configured to, if the number N2 of the electrically operated valves meets a first preset condition, reduce a second operating frequency of the chilled water pump at the K + t-th time according to a set frequency until the operating frequency of the chilled water pump reaches a lower limit frequency.
The first temperature adjusting module 213 is configured to, when the operating frequency of the chilled water pump reaches the lower limit frequency, increase the water supply temperature of the chilled water according to the set temperature if the number N2 of the electrically operated valves still satisfies the first preset condition.
The second determining module 221 is configured to detect second opening degrees of all the electric valves at the K + t-th time, and determine the number N2 of the electric valves, where the second opening degrees of all the electric valves in the air conditioner end combined type air cabinet are greater than a threshold value.
And the first maintaining module 224 is configured to maintain the supply water temperature of the chilled water at the K + t-th time and the second operating frequency of the chilled water pump if the number N2 of the electrically operated valves meets a second preset condition.
And the second frequency modulation module 222 is configured to increase the second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches the upper limit frequency if the number N2 of the electrically operated valves meets a third preset condition.
And the second temperature adjusting module 223 is configured to, when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still meets a third preset condition, adjust the water supply temperature of the chilled water according to the set temperature.
As shown in fig. 6, a schematic structural diagram of a third embodiment of a chilled water supply temperature regulating device for a hospital air conditioner room provided by the present invention is provided, and the supply water temperature regulating device of the embodiment further includes, on the basis of the first embodiment:
the third determining module 311 is configured to detect second opening degrees of all the electric valves at the K + t-th time, and determine the number N2 of the electric valves, where the second opening degrees of all the electric valves in the air conditioner end combined type air cabinet are greater than a threshold value.
And the third frequency modulation module 312 is configured to, if the number N2 of the electrically operated valves meets the first preset condition, reduce the second operating frequency of the chilled water pump at the K + t-th time according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency.
And the third temperature regulating module 313 is configured to, when the operating frequency of the chilled water pump reaches the lower limit frequency, increase the water supply temperature of the chilled water according to the set temperature if the number N2 of the electrically operated valves meets the first preset condition.
The fourth determining module 321 is configured to detect second opening degrees of all the electric valves at the K + t time, and determine the number N2 of the electric valves, where the second opening degrees of all the electric valves in the air conditioner end combined type air cabinet are greater than a threshold value.
And the second maintaining module 324 is configured to maintain the supply water temperature of the chilled water at the K + t-th time and the second operating frequency of the chilled water pump if the number N2 of the electrically operated valves meets a second preset condition.
And the fourth frequency modulation module 322 is configured to increase the second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches the upper limit frequency if the number N2 of the electrically operated valves meets the third preset condition.
And the fourth temperature adjusting module 323 is configured to, when the operating frequency of the chilled water pump reaches the upper limit frequency, decrease the water supply temperature of the chilled water according to the set temperature if the number N2 of the electrically operated valves still satisfies the third preset condition.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A method for adjusting the supply water temperature of chilled water in a hospital air conditioner room is characterized by comprising the following steps:
when a refrigeration host of an air conditioner room normally operates, acquiring first opening degrees of all electric valves in a combined type air cabinet at the tail end of an air conditioner at the K-th moment, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees;
if the number N1 of the electric valves meets a first preset condition, adjusting down a first operating frequency of the chilled water pump according to a set frequency;
if the number N1 of the electric valves meets a second preset condition, keeping the first operating frequency of the chilled water pump and the water supply temperature of the chilled water;
if the number N1 of the electric valves meets a third preset condition, increasing the first operating frequency of the chilled water pump according to the set frequency;
the first operating frequency is the real-time operating frequency of the chilled water pump at the Kth moment, and the set frequency is 10% of the real-time operating frequency;
the first preset condition is that at the K-th moment, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is not more than 95%;
if the number N1 of the electric valves meets a first preset condition, adjusting the first running frequency of the chilled water pump according to a set frequency through the following formula:
the second preset condition is that at the K time, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is only 95% or more;
the third preset condition is that at the K time, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is 2 or more than 2 and exceeds 95 percent;
if the number N1 of the electric valves meets a third preset condition, adjusting the first operating frequency of the chilled water pump according to the set frequency by the following formula:
wherein, the f1 ch,pumpRepresenting a first operating frequency, said f2 ch,pumpRepresenting a second operating frequency;
if the number N1 of the electric valves meets a first preset condition, the step of adjusting the first running frequency of the chilled water pump according to the set frequency comprises the following steps:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a first preset condition, adjusting the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency;
when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number N2 of the electric valves still meets a first preset condition, the water supply temperature of the chilled water is increased according to a set temperature;
if the number N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump;
if the number N2 of the electric valves meets a third preset condition, increasing a second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches an upper limit frequency;
when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still meets the third preset condition, the water supply temperature of the chilled water is reduced according to the set temperature.
2. The method for adjusting the supply temperature of the chilled water of the hospital air conditioner room according to the claim 1, wherein if the number of the electrically operated valves N1 satisfies a third preset condition, the step of increasing the first operating frequency of the chilled water pump according to the set frequency comprises the following steps:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a first preset condition, adjusting the second operating frequency of the chilled water pump at the K + t moment according to the set frequency until the operating frequency of the chilled water pump reaches the lower limit frequency;
when the operating frequency of the chilled water pump reaches the lower limit frequency, if the number of the electrically operated valves N2 meets a first preset condition, the water supply temperature of the chilled water is increased according to a set temperature.
3. The method for adjusting the supply temperature of the chilled water of the hospital air conditioner room according to the claim 1, wherein if the number of the electrically operated valves N1 satisfies a third preset condition, the step of increasing the first operating frequency of the chilled water pump according to the set frequency comprises the following steps:
after the refrigeration host runs for a preset time period t:
detecting second opening degrees of all the electric valves at the K + t moment, and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
if the number N2 of the electric valves meets a second preset condition, keeping the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump;
if the number N2 of the electric valves meets a third preset condition, increasing a second operating frequency of the chilled water pump according to the set frequency until the operating frequency of the chilled water pump reaches an upper limit frequency;
when the operating frequency of the chilled water pump reaches the upper limit frequency, if the number N2 of the electrically operated valves still meets the third preset condition, the water supply temperature of the chilled water is reduced according to the set temperature.
4. The utility model provides a hospital air conditioner computer lab refrigerated water supplies water temperature regulation apparatus which characterized in that includes:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring first opening degrees of all electric valves in a combined air cabinet at the tail end of an air conditioner at the K-th moment when a refrigeration host of an air conditioner room operates normally, and determining the number N1 of the electric valves larger than a threshold value according to the first opening degrees;
the first execution unit is used for reducing the first operating frequency of the chilled water pump according to the set frequency if the number N1 of the electric valves meets a first preset condition;
the second execution unit is used for keeping the first operating frequency of the chilled water pump and the water supply temperature of the chilled water if the quantity N1 of the electric valves meets a second preset condition;
the third execution unit is used for increasing the first operating frequency of the chilled water pump according to the set frequency if the number N1 of the electric valves meets a third preset condition;
the first operating frequency is the real-time operating frequency of the chilled water pump at the Kth moment, and the set frequency is 10% of the real-time operating frequency;
the first preset condition is that at the K-th moment, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is not more than 95%;
if the number N1 of the electric valves meets a first preset condition, adjusting the first running frequency of the chilled water pump according to a set frequency through the following formula:
the second preset condition is that at the K time, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is only 95% or more;
the third preset condition is that at the K time, the opening degree of all electric valves of the combined type air cabinet at the tail end of the air conditioner is 2 or more than 2 and exceeds 95 percent;
if the number N1 of the electric valves meets a third preset condition, adjusting the first operating frequency of the chilled water pump according to the set frequency by the following formula:
wherein, the f1 ch,pumpRepresenting a first operating frequency, said f2 ch,pumpRepresenting a second operating frequency;
further comprising:
the first determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the first frequency modulation module is used for reducing the second running frequency of the chilled water pump at the K + t moment according to the set frequency until the running frequency of the chilled water pump reaches the lower limit frequency if the number N2 of the electric valves meets a first preset condition;
the first temperature adjusting module is used for adjusting the water supply temperature of the chilled water according to a set temperature if the number N2 of the electric valves still meets a first preset condition when the operating frequency of the chilled water pump reaches a lower limit frequency;
the second determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the first keeping module is used for keeping the water supply temperature of the chilled water at the K + t moment and the second running frequency of the chilled water pump if the quantity N2 of the electric valves meets a second preset condition;
the second frequency modulation module is used for increasing the second operating frequency of the chilled water pump according to the set frequency if the number N2 of the electric valves meets a third preset condition until the operating frequency of the chilled water pump reaches an upper limit frequency;
and the second temperature regulating module is used for reducing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves still meets a third preset condition when the operating frequency of the chilled water pump reaches the upper limit frequency.
5. The chilled water supply temperature regulating device for hospital air conditioner rooms according to claim 4, further comprising:
the third determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the third frequency modulation module is used for reducing the second running frequency of the chilled water pump at the K + t moment according to the set frequency until the running frequency of the chilled water pump reaches the lower limit frequency if the number N2 of the electric valves meets a first preset condition;
and the third temperature regulating module is used for increasing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves meets a first preset condition when the operating frequency of the chilled water pump reaches the lower limit frequency.
6. The chilled water supply temperature regulating device for hospital air conditioner rooms according to claim 4, further comprising:
the fourth determining module is used for detecting second opening degrees of all the electric valves at the K + t moment and determining the number N2 of the electric valves of which the second opening degrees of all the electric valves in the combined type air cabinet at the tail end of the air conditioner are larger than a threshold value;
the second maintaining module is used for maintaining the water supply temperature of the chilled water at the K + t moment and the second operating frequency of the chilled water pump if the quantity N2 of the electric valves meets a second preset condition;
the fourth frequency modulation module is used for increasing the second operating frequency of the chilled water pump according to the set frequency if the number N2 of the electric valves meets a third preset condition until the operating frequency of the chilled water pump reaches an upper limit frequency;
and the fourth temperature regulating module is used for reducing the water supply temperature of the chilled water according to the set temperature if the number N2 of the electric valves still meets a third preset condition when the operating frequency of the chilled water pump reaches the upper limit frequency.
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| CN114076367B (en) * | 2020-08-20 | 2023-02-28 | 王晓 | Control system based on minimum hydraulic power is lost dispatch |
| CN111918539B (en) * | 2020-08-31 | 2023-04-07 | 北京世纪互联宽带数据中心有限公司 | Method and device for determining upper limit value of water supply temperature and storage medium |
| CN113339972A (en) * | 2021-06-07 | 2021-09-03 | 博彦物联科技(北京)有限公司 | Water system control method and device and storage medium |
| CN114484556B (en) * | 2022-01-22 | 2022-10-11 | 天津大学 | Water supply temperature regulation and control method based on target energy consumption management and control |
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