CN209341528U - A kind of controlling system of central air conditioner - Google Patents
A kind of controlling system of central air conditioner Download PDFInfo
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- CN209341528U CN209341528U CN201822181432.3U CN201822181432U CN209341528U CN 209341528 U CN209341528 U CN 209341528U CN 201822181432 U CN201822181432 U CN 201822181432U CN 209341528 U CN209341528 U CN 209341528U
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- air conditioner
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Abstract
The utility model proposes a kind of controlling system of central air conditioner, wherein the controlling system of central air conditioner includes: differential temperature survey unit, is used to measure the temperature difference between the supply water temperature of air-conditioner host and the leaving water temperature of the air-conditioner host；And controller, the revolving speed of at least one of refrigerating water pump and cooling pump is connect and can controlled according to the temperature difference of measurement and the setting temperature difference with the differential temperature survey cell signal.The controlling system of central air conditioner of the utility model can be automatically controlled to entreating the energy of air conditioning water and cooling water recirculation system and cooling tower to realize, and then reach energy-efficient purpose.
Description
Technical field
The utility model relates to field of heating ventilation air conditioning more particularly to a kind of controlling system of central air conditioner.
Background technique
Central air-conditioning is the biggish equipment of power consumption to using for unit, and in some malls, air-conditioner power consumption accounts for always using
60% or so of electricity, therefore the energy conservation of central air-conditioning has biggish economic benefit；Central air conditioner system is in design, generally
Required maximum cooling capacity selects type when being by local most hot weather, and stays 10%~20% design margin.However,
Actually most time air-conditionings will not operate under full load condition, therefore there are biggish more than needed, central air conditioner systems
Part energy-saving potential just from this.
In addition, central air conditioner system is indispensable auxiliary facility for building, but its energy consumption is very
Greatly.Since central air conditioner system is all by maximum load and to increase certain surplus design, and actually in 1 year, under full load
Operation at most only more than ten days or even more than ten a hours, almost most time loads are all run below 70%.In usually
It entreats the load of freezing host in air-conditioning system that can automatically adjust with season temperature change to load, and it is cold to match with freezing host
Jelly pump, cooling pump cannot but automatically adjust load, almost run under 100% load for a long time.
Since cooling and heating load changes with temperature change, so the freezing host of central air conditioner system should become according to load
Change load or off-load at any time, and chilled water pump and cooling water pump also should make corresponding adjusting with load variation, otherwise will result in
Very big waste.In central air conditioner system, the capacity of chilled water pump and cooling water pump is negative according to building design maximum heat
What lotus was selected, and there are certain design margins；In order to adapt to load variations, the mode of throttling or reflux is generallyd use to adjust
Flow, thus generate a large amount of throttling or return loss.
Central air conditioner system is, when load maximum design most hot by weather, and there are 15% or so design margins.Wherein
Refrigeration host computer can change automatic load or off-load according to load, and chilled water pump and cooling water pump but cannot make phase with load variation
The adjusting answered.In this way, chilled water, cooling water system are almost run in the state of big flow, the small temperature difference for a long time, energy is caused
Significant wastage.
It therefore, is the drawbacks described above in the current technology of solution, it is necessary to propose a kind of new central air-conditioning energy control system
System.
Utility model content
In view of the drawbacks of the prior art, the utility model aim is to propose a kind of central hollow containing PLC and frequency converter
Energy-saving control system is adjusted, to achieve the purpose that save electric energy.
Achieve the purpose that save electric energy to overcome drawbacks described above and realizing, the utility model proposes a kind of adjustings of central hollow
It can control system, wherein the controlling system of central air conditioner includes:
Differential temperature survey unit is used to measure between the supply water temperature of air-conditioner host and the leaving water temperature of the air-conditioner host
The temperature difference；And
Controller, connect and can be according to the temperature difference of measurement and the setting temperature difference with the differential temperature survey cell signal
To control the revolving speed of at least one of refrigerating water pump and cooling pump.
Controlling system of central air conditioner as described above, wherein the controller can be according to the temperature difference of measurement
The revolving speed of the refrigerating water pump and the cooling pump is controlled with the setting temperature difference.
Controlling system of central air conditioner as described above, wherein the controller is programmable logic controller (PLC).
Controlling system of central air conditioner as described above, wherein further include:
Frequency converter adjusts in refrigerating water pump and cooling pump according to the adjustment signal of programmable logic controller (PLC) output
The revolving speed of at least one.
Controlling system of central air conditioner as described above, wherein the differential temperature survey unit includes: the first temperature sensing
Device and second temperature sensor,
Wherein, first temperature sensor and the second temperature sensor are respectively arranged at the return water of the refrigerating water pump
Pipeline and outlet pipeline.
Controlling system of central air conditioner as described above, wherein the differential temperature survey unit further include: third temperature passes
Sensor and the 4th temperature sensor,
Wherein, the third temperature sensor and the 4th temperature sensor are respectively arranged at the return water of the cooling pump
Pipeline and outlet pipeline.
Controlling system of central air conditioner as described above, wherein
The frequency converter include: with the controller the first frequency converter that mutually electricity connects, first frequency converter with it is described cold
Freeze pump phase electricity to connect.
Controlling system of central air conditioner as described above, wherein
The frequency converter further include: with the controller the second frequency converter that mutually electricity connects, second frequency converter with it is described
Cooling pump phase electricity connects.
Controlling system of central air conditioner as described above, wherein returning for the refrigerating water pump is stored on the controller
First temperature difference of setting between water lines and outlet pipeline.
Controlling system of central air conditioner as described above, wherein returning for the cooling pump is stored on the controller
Second temperature difference of setting between water lines and outlet pipeline.
The controlling system of central air conditioner of the utility model by centre air conditioning water and cooling water recirculation system with
And the energy of cooling tower is realized and is automatically controlled, and then reaches energy-efficient purpose.
Detailed description of the invention
It, below will be to embodiment or existing in order to illustrate more clearly of the utility model embodiment or existing technical solution
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this reality
With some embodiments of novel middle record, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is that the controlling system of central air conditioner of the utility model controls the schematic diagram of refrigerating water pump；
Fig. 2 is that the controlling system of central air conditioner of the utility model controls the schematic diagram of cooling pump.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual ratio.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with specific embodiment and phase
The technical solution of the utility model is clearly and completely described in the attached drawing answered.Obviously, described embodiment is only this reality
With novel a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work belongs to the model of the utility model protection
It encloses.
As depicted in figs. 1 and 2, the controlling system of central air conditioner of the utility model includes: differential temperature survey unit, is used
The temperature difference between the supply water temperature of measurement air-conditioner host and the leaving water temperature of the air-conditioner host；And controller, and it is described
The connection of differential temperature survey cell signal can simultaneously control in refrigerating water pump and cooling pump extremely according to the temperature difference of measurement and the setting temperature difference
Few one revolving speed.
The controlling system of central air conditioner of the utility model controls according to the temperature difference of measurement with the default temperature difference cold
Freeze the revolving speed of pump and at least one of cooling pump, to adjust the circulation rate of chilled water and flow and/or adjust cooling water
Internal circulating load, so that it is negative to realize that refrigerating water pump in central air conditioner system and/or cooling pump can be automatically adjusted with season temperature change
It carries, to achieve the effect that save electric energy and extend the bulk life time of central air-conditioning, wherein the air-conditioner host in central air conditioner system
Composition and working principle be well known to those skilled in the art, no longer repeat in detail herein.
In one embodiment, controller can be according to the temperature difference and the setting temperature difference (the i.e. water supply of air-conditioner host of measurement
The temperature difference set between temperature and the leaving water temperature of the air-conditioner host) control the revolving speed of refrigerating water pump and cooling pump, in this implementation
In example, the setting temperature difference △ t that is stored between the inflow and outflow of refrigerating water pump in a controller1' and storage cooling pump
Inflow and outflow between set temperature △ t2', differential temperature survey unit can measure between the inflow and outflow of refrigerating water pump
Temperature difference △ t1And the temperature difference △ t between the inflow and outflow of measurement cooling pump2, controller is according to △ t1With △ t1' between difference
Value come adjust refrigerating water pump output chilled water circulation rate and flow, wherein the size of the flow of chilled water can pass through stream
Meter 3 obtains, and PLC connects with 3 phase electricity of flowmeter, to obtain the flow obtained of flowmeter 3.And controller is according to △
t2With △ t2' between difference adjust the internal circulating load of the cooling water of cooling pump, wherein the size of the flow of cooling water can lead to
Overcurrent meter 11 obtains, and PLC connects with 11 phase electricity of flowmeter, so that the flow obtained of flowmeter 11 is obtained, to realize
The purpose of electric energy is saved, i.e., controls the revolving speed of refrigerating water pump and cooling pump simultaneously by a controller.Certainly, practical new at this
The controlling system of central air conditioner of type can also be set there are two controller, and one of controller is according to △ t1With △ t1' between
Difference come adjust refrigerating water pump output chilled water circulation rate and flow, another controller is according to △ t2With △ t2' between
Difference adjust the internal circulating load of the cooling water of cooling pump, concrete restriction is not carried out to the quantity of controller herein, this is at this
Within the scope of utility model.
In one embodiment, above controller is programmable logic controller (PLC).Further, the programmable logic control
Device processed is PLC controller.Specifically, PLC controller is compared the temperature difference and the setting value temperature difference that are collected into, then according to than
Compared with difference come output adjustment refrigerating water pump and/or cooler revolving speed signal, to realize whole refrigerating water pump and/or cooler
Revolving speed changes the temperature difference (realizing the purpose of adjustment input value) of measurement by adjusting revolving speed.With other simple control fortune
Difference is calculated, PLC controller can adjust input value according to the occurrence rate of historical data and difference, can make system more in this way
Accurately, more stable.It can be proved by the method for mathematics, cause system to have steady state error or process anti-in other control methods
In the case where multiple, a PLC feedback loop can but keep the stabilization of system.More accurate and stable skill is controlled to realize
Art effect.
PLC controller (Proportion Integration Differentiation. proportional integral differential control
Device), it is made of proportional unit P, integral unit I and differentiation element D.Pass through the setting of tri- parameters of Kp, Ki and Kd.PLC control
Device is primarily adapted for use in substantially linear and dynamic characteristic time invariant system.
The parameter tuning of PLC controller is the core content of Control System Design.It is true according to the characteristic of controlled process
Determine proportionality coefficient, the time of integration and the size of derivative time of PLC controller.There are many method of PLC controller parameter tuning, generally
Two major classes are bracketed: first is that theoretical calculation tuning method.It mainly according to the mathematical model of system, is determined by theoretical calculation
Controller parameter.This obtained calculating data of method can may not directly be used, it is necessary to be adjusted by the way that engineering is practical
And modification.Second is that practical tuning method, it relies primarily on engineering experience, directly carries out in the test of control system, and method
Simply, it is easy to grasp, is widely adopted in practice in engineering.The practical tuning method of PLC controller parameter, mainly there is critical ratio
Example method, response curve method and damped method.Three kinds of methods have their own characteristics, and common ground is all by test, then according to engineering
Empirical equation adjusts controller parameter.But no matter the obtained controller parameter of any method is used, required
Carried out in actual motion last adjustment with it is perfect.Typically now using aritical ratio method.PLC control is carried out using this method
Steps are as follows for the adjusting of device parameter: (1) sampling period short enough preselected first allows system to work；(2) ratio is only added
Example controlling unit writes down rate mu-factor at this moment and critical until threshold oscillation occurs in step response of the system to input
Cycle of oscillation；(3) parameter of PLC controller is calculated by formula under certain degree of control.
Although different types of controller, structure, principle are different, and there are three basic control laws: ratio
Example (P) control, integral (I) control and differential (D) control.These types of control law can be used alone, and occasion is but more
It is applied in combination.Such as ratio (P) control, proportional, integral (PI) control, proportional-integral-differential (PLC) control.
Ratio (P) control
Individual ratio control is also referred to as " having poor control ", the variation of output and the proportional relationship of the deviation of input controller,
Deviation is bigger, and output is bigger.In practical application, the size of proportional band is answered depending on the circumstances, and proportional band is too big, control action
It is too weak, it is unfavorable for system disturbance cancelling, remaining difference is too big, and control is of poor quality, also without what control action；Proportional band is too small, control
It is too strong to make use, is easy to cause the bad stability of system, causes oscillation.
For being quick on the draw, the controlled device that amplifying power is strong, for improve system stability, proportional band should be made slightly larger
A bit；And for slow in reacting, amplifying power and weaker controlled device, proportional band is optional smaller, to improve whole system
Sensitivity can also accordingly reduce remaining difference.
Simple ratio control is suitable for disturbance less, and lag is smaller, and load variations are small, it is desirable that and it is not high, allow to have certain
Occasion existing for remaining difference.The use of ratio control law is more universal in industrial production.
Proportional integration (PI) control
Ratio control law be in basic control law it is most basic, using most common one kind, great advantage is exactly
Control is in time, rapidly.As long as there is deviation generation, controller generates control action immediately.It can however not final eliminate lacking for remaining difference
Point limits its exclusive use.The method for overcoming remaining difference is on the basis of ratio control plus integral control action.
The output of integral controller is directly proportional to integral of the input deviation to the time.Here " integral " refers to " accumulating "
The meaning.Integral controller output it is not only related with the size of input deviation, but also and deviation existing for the time it is related.Only
Deviation is wanted to exist, output just will continue to accumulate (output valve is increasing or smaller and smaller), until deviation is zero, accumulate just meeting
Stop.So integration control can eliminate remaining difference.Integration control rule is also known as indifference control law.
The size of the time of integration characterizes the power of integral control action.The time of integration is smaller, and control action is stronger；Instead
It, control action is weaker.
Although integration control can be eliminated remaining poor, there is controlled not in time for it.Because integrating the accumulation of output
Be it is progressive, the control action generated always lags behind the variation of deviation, cannot timely and effectively overcome the influence of interference, difficult
So that control system settles out.So integration control is not used alone in practical generally, but combined with ratio control action
Get up, composition integration control.The length for taking the two in this way, makes up mutually, and not only proportional control action was rapid timely, but also had
Integral control action eliminates the ability of remaining difference.Therefore, ideal process control may be implemented in proportional plus integral control.
Pi controller is a kind of controller being most widely used at present, is chiefly used in liquid level in industrial production, pressure
Power, flow dispatch control system.Remaining difference can be eliminated due to introducing integral action, the defect of pure ratio control is compensated for, obtains preferable
Control quality.But the introducing of integral action, system stability can be made to be deteriorated.For there is the control system of larger inertia lag
System, Yao Jinliang avoid using.
Proportion differential (PD) control
Proportional plus integral control uses the controlled device of time lag not ideal enough.So-called " time lag " refers to:
After controlled device is disturbed effect, controlled variable does not change immediately, but has a temporal delay, such as
Capacity lag, at this time proportional plus integral control seem blunt, not in time.For this purpose, people imagine: can be according to the variation tendency of deviation
To make corresponding control action? like experienced operator, opening for valve can be changed according to the size of deviation
It spends (proportional action), and excessive control can be carried out in advance according to the velocity magnitude of change of error come estimated the case where will occurring,
" preventing trouble before it happens ".Here it is the derivation control actions with " advanced " control action.The size of derivative controller output depends on
In the speed of input deviation variation.
Differential output only and deviation pace of change it is related, and and deviation size and deviation with the presence or absence of whether nothing
It closes.If deviation is a fixed value, regardless of much, as long as not changing, the variation one exported is set to zero, and controller is not any
Control action.Derivative time is bigger, and the time that differential output maintains is longer, therefore the differential action is stronger；It is on the contrary then weaker.When
When derivative time is 0, just there is no derivative control action.Similarly, the selection of derivative time, and need to come according to the actual situation
Determining.
The characteristics of derivative control action, is: be swift in motion, have the function of load regulation, can be effectively improved controlled device have compared with
The Control platform of big time lag；But it cannot eliminate remaining difference, when inputting especially for constant deviation, just not control at all
Production is used.It is thus impossible to which derivation control action is used alone.
Ratio and the differential action combine, faster than simple proportional action.Object especially big to capacity lag, can be with
Reduce the amplitude of dynamic deviation, saves the control time, significantly improve control quality.
PLC control
Ideal control surely belongs to proportional integral differential control rule.It collects the length of three: existing proportional action
In time rapidly, and there is poor ability more than the elimination of integral action, there are also the controls in advance functions of the differential action.
When deviation step occurs, differential significantly acts immediately, inhibits this transition of deviation；Ratio also rises simultaneously to disappear
Except the effect of deviation, reduce deviation amplitude, since proportional action is the control law persistently and to play a major role, can make
Systematic comparison is stablized；And integral action slowly overcomes remaining difference to fall.As long as the selection of control parameter of three effects is proper, Bian Kechong
The advantages of three kinds of control laws are waved in distribution, obtains ideal control effect.
The programmable logic controller (PLC) of the utility model is PLC controller, so as to realize ideal control effect
Fruit, to reach the technical effect of the stability of the water quality of accurate adjustment furnace water.
Further, in the present invention, controlling system of central air conditioner further includes frequency converter, and frequency converter is according to can
The adjustment signal of programmed logic controller (i.e. PLC) output adjusts the revolving speed of at least one of refrigerating water pump and cooling pump.
In one embodiment, as shown in Figure 1, differential temperature survey unit includes: the first temperature sensor 1 and second temperature
Sensor 2, wherein the first temperature sensor 1 and second temperature sensor 2 are respectively arranged at the water return pipeline of refrigerating water pump 4 and go out
Water lines, to realize the temperature t of the water inlet of measurement refrigerating water pump1With the temperature t of the water outlet of refrigerating water pump2, according to t1And t2Obtain temperature
Poor △ t1, wherein load 10 (i.e. LOAD) of the chilled water flow through central air-conditioning, and play the role of refrigeration.Further, as schemed
Described in 2, differential temperature survey unit further include: third temperature sensor 6 and the 4th temperature sensor 7, wherein third temperature sensor
6 and the 4th temperature sensor 7 be respectively arranged at the water return pipeline and outlet pipeline of cooling pump 8, to realize measurement cooling pump
The temperature t of water inlet3With the temperature t of the water outlet of cooling pump4, according to t3And t4Obtain temperature difference △ t2。
In one embodiment, frequency converter include with controller mutually the first frequency converter 5 for connecing of electricity, the first frequency converter 5 with
4 phase electricity of refrigerating water pump connects.Further, frequency converter further includes and controller the second frequency converter 9 that mutually electricity connects, second frequency converter
9 connect with the 8 phase electricity of cooling pump, to realize same by the first frequency converter 5 and the second frequency converter 9 by controller (i.e. PLC)
When control the flow of refrigerating water pump 4 and cooling pump 8.It certainly, can also only include a frequency converter, PLC in the utility model
It is not only connect with refrigerating water pump 4 by a frequency converter but also is connected with cooling pump 8, to realize that PLC is handed over by a frequency converter
Alternately control refrigerating water pump 4 and cooling pump 8.In addition, the controlling system of central air conditioner of the utility model can also include two
Controller, one of controller connect with the first frequency converter phase electricity, and the first frequency converter 5 connects with 4 phase electricity of refrigerating water pump, to realize one
The temperature t of the water inlet for the refrigerating water pump that a controller is measured according to the first temperature sensor 11It is measured with second temperature sensor 2
The temperature t of the water outlet of refrigerating water pump2Between difference △ t1With the setting temperature difference △ t of the refrigerating water pump of energy-saving control system1' (wherein,
The setting temperature difference △ t of the refrigerating water pump 4 of the arrow characterization PLC energy-saving control system obtained of the leftmost side PLC in Fig. 11'), come
The revolving speed of refrigerating water pump 4 is adjusted, to realize the circulation rate and flow for the chilled water that adjustment refrigerating water pump 4 exports；Another control
Device connects with 9 phase electricity of the second frequency converter, and the second frequency converter 9 connects with 8 phase electricity of cooling pump, to realize another controller according to
The temperature t of the water inlet of three-temperature sensor 6 and the cooling pump 8 of the 4th temperature sensor 7 measurement3With the temperature of the water outlet of cooling pump 8
Spend t4Between difference △ t2With the setting temperature difference △ t of the cooling pump 8 of energy-saving control system2' adjust the revolving speed of cooling pump 8, from
And realize the internal circulating load of the cooling water of adjustment cooling pump 8.
Further illustrating to carry out Frequency Conversion Modification control principle to refrigerating water pump and cooling pump respectively.Refrigerating water pump is become
Frequency structural control principle: PLC controller passes through thermal module and temperature sensor for the return water temperature and leaving water temperature of refrigerating water pump
Controller memory is read in, and calculates temperature difference；Then control frequency converter is compared to according to the temperature difference and the setting temperature difference
Frequency, and then control refrigerating water pump revolving speed, with realize adjust water outlet flow, control the speed of heat exchange；When the temperature difference is larger
When, the revolving speed of refrigerating water pump is improved, the circulation rate and flow of chilled water are accelerated；Conversely, reducing the revolving speed of refrigerating water pump, slow down freezing
The circulation rate and flow of water slow down the speed of heat exchange to save electric energy.Frequency Conversion Modification control principle is carried out to cooling pump: by
When cooling unit operation, the heat exchange amount of condenser is to take cooling tower radiating and cooling to by cooling water, then pumped by cooling
It is constantly recycled to condenser.Cooling water water inlet temperature difference of outlet water should improve the revolving speed of cooling pump when big, increase cooling water
Internal circulating load；Conversely, reducing the revolving speed of cooling pump, reduce the internal circulating load of cooling water, to save electric energy.
Further, as depicted in figs. 1 and 2, in system for being mounted with that temperature sensor, PLC are supplied on return main
Return water temperature, and the temperature difference △ t of return water and water outlet is calculated, it is compared with the △ t ' of default.If △ t ' is greatly, explanation
Room temperature is high, and the revolving speed of Ying Tigao refrigerating water pump accelerates the circulation rate of chilled water to increase flow, accelerates the speed of heat exchange
Degree；Conversely, then illustrating that room temperature is low, the revolving speed of refrigerating water pump can be reduced to reduce flow, save electric energy.
The above description is only the embodiments of the present invention, is not intended to limit the utility model.For this field
For technical staff, various modifications and changes may be made to the present invention.All institutes within the spirit and principle of the utility model
Any modification, equivalent substitution, improvement and etc. of work, should be included within the scope of the claims of the utility model.
Claims (10)
1. a kind of controlling system of central air conditioner, which is characterized in that the controlling system of central air conditioner includes:
Differential temperature survey unit is used to measure the temperature between the supply water temperature of air-conditioner host and the leaving water temperature of the air-conditioner host
Difference；And
Controller connect with the differential temperature survey cell signal and can be controlled according to the temperature difference of measurement with the setting temperature difference
The revolving speed of fine frozen pump and at least one of cooling pump.
2. controlling system of central air conditioner according to claim 1, which is characterized in that the controller can be according to survey
The fixed temperature difference controls the revolving speed of the refrigerating water pump and the cooling pump with the setting temperature difference.
3. controlling system of central air conditioner according to claim 1, which is characterized in that the controller is programmable patrols
Collect controller.
4. controlling system of central air conditioner according to claim 3, which is characterized in that further include:
Frequency converter adjusts in refrigerating water pump and cooling pump extremely according to the adjustment signal of programmable logic controller (PLC) output
Few one revolving speed.
5. controlling system of central air conditioner according to claim 4, which is characterized in that the differential temperature survey unit packet
It includes: the first temperature sensor and second temperature sensor,
Wherein, first temperature sensor and the second temperature sensor are respectively arranged at the water return pipeline of the refrigerating water pump
And outlet pipeline.
6. controlling system of central air conditioner according to claim 5, which is characterized in that the differential temperature survey unit also wraps
It includes: third temperature sensor and the 4th temperature sensor,
Wherein, the third temperature sensor and the 4th temperature sensor are respectively arranged at the water return pipeline of the cooling pump
And outlet pipeline.
7. controlling system of central air conditioner according to claim 6, which is characterized in that
The first frequency converter that the frequency converter includes: and controller phase electricity connects, first frequency converter and the refrigerating water pump
Phase electricity connects.
8. controlling system of central air conditioner according to claim 7, which is characterized in that
The frequency converter further include: with the controller the second frequency converter that mutually electricity connects, second frequency converter and the cooling
Pump phase electricity connects.
9. controlling system of central air conditioner according to claim 8, which is characterized in that stored on the controller
State first temperature difference of setting between the water return pipeline of refrigerating water pump and outlet pipeline.
10. controlling system of central air conditioner according to claim 9, which is characterized in that be stored on the controller
Second temperature difference of setting between the water return pipeline and outlet pipeline of the cooling pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822181432.3U CN209341528U (en) | 2018-12-25 | 2018-12-25 | A kind of controlling system of central air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822181432.3U CN209341528U (en) | 2018-12-25 | 2018-12-25 | A kind of controlling system of central air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007884A (en) * | 2019-12-19 | 2021-06-22 | 新奥数能科技有限公司 | Intelligent control method and system for central air conditioner |
| CN113007868A (en) * | 2021-03-30 | 2021-06-22 | 新奥数能科技有限公司 | Control method and device of central air conditioning system and electronic equipment |
-
2018
- 2018-12-25 CN CN201822181432.3U patent/CN209341528U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007884A (en) * | 2019-12-19 | 2021-06-22 | 新奥数能科技有限公司 | Intelligent control method and system for central air conditioner |
| CN113007868A (en) * | 2021-03-30 | 2021-06-22 | 新奥数能科技有限公司 | Control method and device of central air conditioning system and electronic equipment |
| CN113007868B (en) * | 2021-03-30 | 2022-10-21 | 新奥数能科技有限公司 | Control method and device of central air conditioning system and electronic equipment |
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