JP6453715B2 - Air conditioning system and air conditioning system program - Google Patents

Air conditioning system and air conditioning system program Download PDF

Info

Publication number
JP6453715B2
JP6453715B2 JP2015116679A JP2015116679A JP6453715B2 JP 6453715 B2 JP6453715 B2 JP 6453715B2 JP 2015116679 A JP2015116679 A JP 2015116679A JP 2015116679 A JP2015116679 A JP 2015116679A JP 6453715 B2 JP6453715 B2 JP 6453715B2
Authority
JP
Japan
Prior art keywords
control
air conditioning
air conditioner
control mode
controlling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2015116679A
Other languages
Japanese (ja)
Other versions
JP2017003181A (en
Inventor
達也 中田
達也 中田
Original Assignee
株式会社Nttファシリティーズ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Nttファシリティーズ filed Critical 株式会社Nttファシリティーズ
Priority to JP2015116679A priority Critical patent/JP6453715B2/en
Publication of JP2017003181A publication Critical patent/JP2017003181A/en
Application granted granted Critical
Publication of JP6453715B2 publication Critical patent/JP6453715B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Description

  The present invention relates to an air conditioning system and an air conditioning system program.

  For example, in the air conditioning system described in Patent Document 1, the flow rate of cold / hot water is variably controlled according to the load status of the indoor air conditioner.

Japanese Patent No. 3651974

  The air conditioning capacity generated by the indoor air conditioner varies depending on the flow rate of the cold / hot water circulating through the indoor air conditioner, the temperature of the cold / hot water, and the like. That is, the air conditioning capacity can be controlled by adjusting the flow rate of cold / hot water, the temperature of the cold / hot water, and the like.

  The adjustment of the flow rate can be controlled by adjusting the rotation speed of the pump. Pumps usually have specification limit values such as a lower limit rotational speed and an upper limit rotational speed at the time of use. The lower limit rotational speed may differ depending on the type of pump and the pump manufacturer. Furthermore, with an existing pump, the lower limit rotational speed or the like may be unknown, or the pump rotational speed may not be directly controllable.

When the lower limit rotational speed or the upper limit rotational speed at the time of use is unknown or when the pump rotational speed cannot be directly controlled, it is difficult to appropriately control the air conditioning capacity.
That is, for example, when adjusting the temperature of cold / hot water with the pump rotation speed set to the lower limit rotation speed for the purpose of power saving of the pump, if the lower limit rotation speed during use is unknown, the pump It is difficult to control the number of rotations to an appropriate number for power saving.

  In view of the above points, an object of the present invention is to provide an air conditioning system capable of controlling a fluid machine such as a pump with a value such as a lower limit rotational speed or an upper limit rotational speed (hereinafter referred to as a specification limit value).

  In the present application, “a heat source machine (7A) that generates cold or warm heat used for indoor air conditioning”, “an indoor air conditioner (5) that cools or heats air supplied indoors”, and “heat source machine (7A)” An air conditioner (1) having at least a fluid machine (P2) for supplying a fluid for transporting the heat generated by the air conditioner (5), and a control device for controlling the operation of the air conditioner (1) ( 10) “the first control mode for controlling the air conditioning capacity by changing the flow rate or pressure of the fluid supplied to the indoor air conditioner (5)”, and “the fluid among the devices constituting the air conditioner (1) The control device (10) capable of executing at least one control mode among the “second control mode for controlling the air conditioning capability by controlling devices other than the machine (P2)” and the fluid to be circulated in the indoor air conditioner (5) Detection device for detecting flow rate or pressure (S3 The control device (10) is a fluid control process executed in the first control mode, and the detection value (Ppv) detected by the detection device (S3) approaches the control target value (Pset). When the difference between the fluid control process for controlling the operation of the fluid machine (P2) and the detected value (Ppv) and the control target value (Pset) is equal to or greater than a preset value, Stop processing that stops execution can be executed.

  Thereby, in this invention, it can suppress that control exceeding the specification limit value of a fluid machine (P2) will be performed. Therefore, for example, the air conditioning capability can be controlled in a state where the fluid machine (P2) is maintained at the specification limit value.

  Incidentally, the reference numerals in parentheses for each of the above means are examples showing the correspondence with the specific means described in the embodiments described later, and the present invention is indicated by the reference numerals in the parentheses of the above respective means. It is not limited to specific means.

1 is a conceptual diagram of an air conditioning system according to a first embodiment of the present invention. It is an example of a chart which shows change of target discharge pressure Pset. It is a flowchart which shows the characteristic of the air conditioning system which concerns on embodiment of this invention. It is a conceptual diagram of the air conditioning system which concerns on 3rd Embodiment of this invention.

  The “embodiment of the invention” described below shows an example of the embodiment. In other words, the invention specific items described in the claims are not limited to the specific means and structures shown in the following embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that at least one device described with at least a reference numeral is provided, except for cases where “plurality”, “two or more”, and the like are omitted.

(First embodiment)
1. Outline of Air Conditioning System In the present embodiment, the air conditioning system according to the present invention is applied to an air conditioning system that performs air conditioning such as a communication equipment room or a server room. That is, the air conditioning system according to the present embodiment supplies a plurality of ICT devices by supplying cooling air to heat generating devices such as information communication technology devices (hereinafter referred to as ICT devices) installed in the server room. Cool down.

  As shown in FIG. 1, the air conditioning system includes a heat source unit 7A, an indoor air conditioner 5, and the like. The heat source unit 7A generates heat (cold heat in the present embodiment) used for indoor air conditioning. The heat generated by the heat source unit 7A is supplied into the room via an incompressible fluid (hereinafter referred to as a heat medium) such as water.

  The heat medium is transported to the indoor air conditioner 5 by a fluid machine such as the primary pump P1 and the secondary pump P2. Hereinafter, the heat source device 7A, the primary pump P1, and the secondary pump P2 are collectively referred to as the heat source device 7. The heat source device 7 and the indoor air conditioner 5 are collectively referred to as the air conditioner 1. Note that the heat source unit 7A according to the present embodiment is a vapor compression refrigerator. The heat source unit 7A is an air-cooling type that cools the high-pressure refrigerant with outside air.

2. 2. Configuration of air conditioning system 2.1 Overview of configuration of air conditioning system The indoor air conditioner 5 generates cooling air supplied to the ICT equipment side. In a server room or the like in which a plurality of ICT devices are installed, at least one (four in FIG. 1) indoor air conditioners 5 are installed.

  Each indoor air conditioner 5 is configured by an air handling unit (AHU) having an indoor heat exchanger 5A, a flow rate adjusting valve 5B, an indoor blower 5C, and the like. The indoor heat exchanger 5A exchanges heat between the cold water supplied from the heat source device 7 and the air supplied indoors.

  The heat source unit 7A generates cold heat. The cold heat is supplied to the indoor heat exchanger 5A by cold water as a heat medium. Cold water is supplied to each indoor heat exchanger 5A (indoor air conditioner 5) by the primary pump P1 and the secondary pump P2.

  Each indoor heat exchanger 5A is provided with a flow rate adjusting valve 5B. The flow rate adjusting valve 5B adjusts the amount of chilled water supplied to the indoor heat exchanger 5A. The indoor blower 5C is a blower capable of supplying cold air to the ICT equipment side and adjusting the air volume.

  The heat source unit 7A is installed outdoors. The cold water generated by the heat source unit 7A is supplied to the indoor (indoor air conditioner 5) side by the primary pump P1, and then distributed and supplied to each indoor air conditioner 5 by the secondary pump P2. The bypass flow path L1 is a chilled water circuit that absorbs a flow rate difference when the discharge flow rate of the primary pump P1 and the discharge flow rate of the secondary pump P2 are different.

2.2 Air conditioning capacity adjustment Air conditioning capacity generated in the indoor heat exchanger 5A, that is, cooling capacity generated in the indoor heat exchanger 5A is determined by the opening degree of the flow rate adjusting valve 5B, the amount of air blown from the indoor fan 5C, and the indoor heat exchange. It varies depending on the amount of cold water supplied to the vessel 5A (the amount of water delivered by the secondary pump P2) and the temperature of the cold water (the refrigeration capacity generated by the heat source unit 7A).

  The operations of the heat source unit 7A and the indoor air conditioners 5 constituting the air conditioner 1 are controlled by the integrated controller 10. The integrated control device 10 indirectly controls the air conditioner 1 via the air conditioner control unit 10A, the secondary pump control unit 10B, the primary pump control unit 10C, and the heat source control unit 10D.

  The air conditioner control unit 10A controls the operation of the indoor air conditioner 5, that is, the flow rate adjustment valve 5B, the indoor blower 5C, and the like. The secondary pump control unit 10B controls the amount of cold water supplied to the indoor air conditioner 5 by controlling the operation of the secondary pump P2. The primary pump control unit 10C controls the operation of the primary pump P1. The heat source control unit 10D controls the heat source unit 7A, that is, the rotational speed of the compressor, the opening degree of the expansion valve, and the like.

  Note that the integrated control device 10 and the control units 10A to 10D each include a computer having a CPU, a ROM, a RAM, and the like. A program for executing the control is stored in advance in a nonvolatile storage unit such as a ROM provided in each of the integrated control device 10 and each of the control units 10A to 10D.

3. Control operation by integrated control device, etc. 3.1 Outline of control <Autonomous control of each control unit>
The integrated control device 10 issues a control command signal to each of the control units 10A to 10D. Each of the control units 10A to 10D includes a drive circuit that drives the control target, and directly controls the control target. That is, after receiving the control command signal from the integrated control apparatus 10, each control unit 10A to 10D autonomously executes specific control for realizing the content of the control command signal.

  For example, each indoor air conditioner 5 is provided with a blown air temperature sensor S1. The blown air temperature sensor S1 detects the temperature of air supplied indoors from the indoor air conditioner 5, that is, the temperature of air cooled by the indoor heat exchanger 5A (hereinafter referred to as temperature after heat exchange).

  In the air conditioner control unit 10A, the temperature after heat exchange detected by the blown air temperature sensor S1 is set as “target temperature after heat exchange (hereinafter referred to as target blown temperature Tao)” set by the integrated control device 10. The flow rate adjusting valve 5B and the indoor fan 5C are controlled so that

  That is, the air conditioner control unit 10A autonomously controls the operation of the indoor air conditioner 5 so as to be the current target blow temperature Tao unless the new target blow temperature Tao is set by the integrated control device 10.

  The primary pump control unit 10C and the secondary pump control unit 10B autonomously control the primary pump P1 and the secondary pump P2 so that chilled water having a preset flow rate (hereinafter referred to as a target chilled water circulation amount Wro) circulates. To do.

  When the primary pump control unit 10C and the secondary pump control unit 10B receive the flow rate change command from the integrated control device 10, the received new circulation amount is set as the target cold water circulation amount Wro, and the primary pumps P1, 2 The next pump P2 is controlled autonomously. In the present embodiment, the amount of chilled water circulation is controlled mainly by changing the rotational speed of the secondary pump P2.

  When the rotation speed of the secondary pump P2 increases, the discharge pressure and the amount of chilled water circulation of the secondary pump P2 increase accordingly. Therefore, in the present embodiment, the integrated control device 10 transmits the target discharge pressure Pset corresponding to the command value target cold water circulation amount Wro to the secondary pump control unit 10B.

  The secondary pump control unit 10B controls the rotation speed of the secondary pump P2 so that the actual discharge pressure Ppv becomes the target discharge pressure Pset. The actual discharge pressure Ppv is detected by a pressure sensor S3 provided on the discharge side of the secondary pump P2. A signal indicating the pressure (actual discharge pressure Ppv) detected by the pressure sensor S3 is also input to the integrated control device 10 via the secondary pump control unit 10B.

  On the discharge side of the primary pump P1 or the secondary pump P2 (primary pump P1 in this embodiment), a cold water temperature sensor S2 for detecting the temperature of the cold water is provided. The heat source controller 10 </ b> D is configured so that the chilled water temperature detected by the chilled water temperature sensor S <b> 2 (hereinafter referred to as chilled water discharge temperature) is set as a “target chilled water discharge temperature (hereinafter referred to as target chilled water temperature). The heat source unit 7A is controlled so as to be "Two."

  That is, the heat source control unit 10D autonomously controls the operation of the heat source unit 7A so as to be the current target discharge cold water temperature Two unless the new target discharge cold water temperature Two is set by the integrated control device 10. Note that the control target values such as the target outlet temperature Tao, the target discharge pressure Pset, and the target discharge cold water temperature Two are a target range including a range set in advance with the control target value as a central value.

<Margin control mode>
In the margin control mode, each device is controlled such that the margin A is maintained at a predetermined value or more (hereinafter referred to as the lower limit margin Ac). The margin control mode is executed when the air conditioner is in operation.

  The margin A refers to a parameter relating to the difference between the maximum air conditioning capacity that can be exhibited by the air conditioner (air conditioning system) and the current air conditioning capacity. For example, the margin A for the indoor air conditioner 5 is defined by one of the following.

(1) 1- (Average opening degree of a plurality of flow control valves 5B)
(2) 1-{(average of actual number of revolutions of indoor fan 5C / maximum number of revolutions of indoor fan 5C)}
Maximum number of rotations: Maximum number of rotations of each indoor fan 5C (3) 1 / {(average of blown air temperature-target blown temperature Tao)}
(4) 1-{(average of blown air temperature-target blow temperature Tao)} / n
n: A value corresponding to (blow air temperature−target blow temperature Tao), which is a preset value, that is, n means an allowable temperature difference (allowable deviation temperature).

(5) 1 / {(average of cold water discharge temperature−target discharge cold water temperature Two)}
(6) 1-{(average of cold water discharge temperature−target discharge cold water temperature Two)} / n
n: A value corresponding to (cold water discharge temperature−target discharge cold water temperature Two), which is a preset value, that is, n means an allowable temperature difference (allowable deviation temperature).

  The integrated control device 10 can maintain the indoor environment in a preset environment (hereinafter referred to as a setting environment) and the margin A is greater than or equal to the lower limit margin Ac when the margin control mode is executed. For example, control (hereinafter, referred to as a power saving control mode) is performed to reduce the target chilled water circulation amount Wro while increasing the target discharge chilled water temperature Two within a maintainable range.

  Thereby, the power consumption of the primary pump P1 or the secondary pump P2 can be reduced while the opening degree of the flow rate adjustment valve 5B is increased and the pressure loss in the flow rate adjustment valve 5B is reduced.

  When the margin A is less than the lower limit margin Ac, the integrated control device 10 does not execute the margin control mode and the power saving control mode, and performs normal air conditioning operation using the autonomous control of each control unit 10A to 10D. Run. The reason is that when the margin A is less than the lower limit margin Ac, there is a high possibility that the air conditioning environment in the server room deviates from the set environment.

  In other words, if the margin A is small, there is a high possibility that the heat supplied from the air conditioner will be transiently insufficient when the amount of heat generated by the ICT equipment rapidly increases, and that there is a high possibility that a thermal failure will occur in the ICT equipment. Because it becomes.

3.2 Power saving control mode <Overview of power saving control mode>
In the power saving control mode, as described above, the target chilled water circulation amount Wro, that is, the target discharge pressure Pset, is decreased while increasing the target discharge chilled water temperature Two.

  That is, the power saving control mode is executed separately in the first control mode and the second control mode. In the first control mode, the air flow capacity is controlled by changing the discharge flow rate or discharge pressure (discharge pressure in the present embodiment) of the secondary pump P2.

  The second control mode controls the air conditioning capability by controlling devices other than the secondary pump P2 among the devices constituting the air conditioner 1. In the second control mode according to the present embodiment, the heat generated by the heat source device 7A, that is, the target cold water temperature Two is variably controlled. Then, the integrated control device 10 executes the first control mode first, stops the execution of the first control mode, and then executes the second control mode.

  In the first control mode, as shown in FIG. 2, the integrated control apparatus 10 gradually decreases the target discharge pressure Pset. For this reason, the secondary pump control unit 10B decreases the rotational speed of the secondary pump P2 so as to approach the decreased target discharge pressure Pset.

  Then, the integrated control device 10 has a difference between the discharge pressure Ppv and the target discharge pressure Pset (hereinafter referred to as a follow-up degree ΔP) equal to or greater than a preset value (hereinafter referred to as a follow-up limit ΔPc) and the follow-up degree. The execution of the first control mode is stopped when the state where ΔP is equal to or greater than the tracking limit ΔPc continues for a preset time Tpc.

  In the state where the first control mode is stopped, the discharge pressure of the secondary pump P2 is maintained at the target discharge pressure Pset when the follow-up degree ΔP becomes equal to or more than the follow-up limit ΔPc. When the second control mode is executed, the integrated control apparatus 10 increases the target cold water temperature Two within a range in which the margin A can be maintained at the lower limit margin Ac or higher.

  When the margin A becomes less than the lower limit margin Ac during execution of the first control mode, the first control mode is stopped at that time, and the target discharge pressure Pset is increased and changed to a predetermined pressure. As a result, the power saving control mode is stopped.

<Details of power saving control mode>
FIG. 3 shows an example of a control flow in the power saving control mode. A program for executing the power saving control mode is stored in advance in a nonvolatile storage unit such as a ROM. The program is executed by the integrated control apparatus 10.

  When the power saving control mode is activated, it is determined whether the margin A is equal to or greater than the lower limit margin Ac (S1). When it is determined that the margin A is not equal to or greater than the lower limit margin Ac (S1: NO), the power saving control mode is stopped (S40).

  If it is determined that the margin A is equal to or greater than the lower limit margin Ac (S1: YES), the target discharge pressure Pset is reset to a value that is smaller by a predetermined pressure (S5), and then the margin A Is greater than or equal to the lower limit margin Ac (S10).

  When it is determined that the margin A is not equal to or greater than the lower limit margin Ac (S10: NO), the power saving control mode is stopped (S40). When it is determined that the margin A is equal to or greater than the lower limit margin Ac (S10: YES), after determining whether the tracking degree ΔP is equal to or greater than the tracking limit ΔPc (S15), the margin A is the lower limit. It is determined whether or not it is greater than the margin Ac (S20).

  When it is determined that the margin A is not equal to or greater than the lower limit margin Ac (S20: NO), the power saving control mode is stopped (S40). When it is determined that the margin A is equal to or greater than the lower limit margin Ac (S20: YES), the state where the dependency ΔP is equal to or greater than the tracking limit ΔPc (hereinafter referred to as elapsed time) continues for the time Tpc or longer. It is determined whether or not (S25).

  When the elapsed time becomes equal to or longer than time Tpc (S25: YES), it is determined whether or not the margin A is equal to or greater than the lower limit margin Ac (S30). If it is determined that the margin A is not equal to or greater than the lower limit margin Ac (S30: NO), the power saving control mode is stopped (S40).

When it is determined that the margin A is equal to or greater than the lower limit margin Ac (S30: YES), the second control mode is executed after the first control mode is stopped (S35).
4). Features of the air conditioning system according to the present embodiment In the present embodiment, the first control mode is stopped when the follow-up ΔP is equal to or greater than the follow-up limit ΔPc, so that the control exceeds the specification limit value of the secondary pump P2. Can be prevented from being executed. Therefore, for example, the air conditioning capability can be controlled in a state where the secondary pump P2 is maintained at the specification limit value.

(Second Embodiment)
In the first control mode according to the first embodiment, the air conditioning capacity is controlled by changing the discharge pressure of the secondary pump P2. On the other hand, in the first control mode according to the present embodiment, the integrated control device 10 gradually decreases the rotational speed of the indoor fan 5C.

  That is, the rotation speed of the indoor blower 5C is a physical quantity corresponding to the flow rate or pressure of the air flow supplied into the room. The integrated control apparatus 10 gradually decreases the “target rotational speed of the indoor fan 5C (hereinafter referred to as target rotational speed)” corresponding to the target discharge pressure Pset.

  The air conditioner control unit 10A reduces the rotation speed of the indoor fan 5C (hereinafter referred to as fan rotation speed) so as to approach the decreased target rotation speed. A signal indicating the current fan speed is input to the integrated control device 10 via the air conditioner control unit 10A.

  The current fan speed is a physical quantity corresponding to the discharge pressure Ppv. The fan rotation speed is detected using a tachometer such as an encoder or an actual command signal value or the like issued from the air conditioner control unit 10A to the indoor fan 5C.

  Then, the integrated control device 10 is in a state where the difference between the current fan speed and the target speed, that is, the follow-up degree ΔP in the present embodiment is not less than the follow-up limit ΔPc and the follow-up degree ΔP is not less than the follow-up limit ΔPc. Is stopped for the preset time Tpc or longer, the execution of the first control mode is stopped.

  In the present embodiment, the flow rate or pressure of the air flow is controlled and detected using the fan rotation speed. However, in the present embodiment, the flow rate or pressure of the air flow is directly or directly limited. It may be controlled and detected indirectly. That is, the indoor blower 5C is an example showing a specific example of “an air flow adjusting unit that adjusts the flow rate or pressure of the air flow supplied into the room”.

(Third embodiment)
This embodiment is a modification of the second embodiment. That is, as shown in FIG. 4, the integrated control apparatus 10 according to the present embodiment gradually decreases the opening degree of the damper 6A. The damper 6 </ b> A is an example showing a specific example of the air flow adjusting unit, and adjusts the flow rate or pressure of the air flow supplied into the room via the air flow duct 6.

  Specifically, the damper 6A is disposed at the indoor outlet 6B of the airflow duct 6 and adjusts the flow rate or pressure of the airflow by adjusting the cross-sectional area of the airflow passage, that is, the opening degree. The integrated control device 10 gradually decreases a “target opening degree (hereinafter referred to as a target opening degree)” corresponding to the target discharge pressure Pset.

  The air conditioner control unit 10A decreases the current opening degree so as to approach the reduced target opening degree. A signal indicating the current opening is input to the integrated control device 10 via the air conditioner control unit 10A. The current opening is a physical quantity corresponding to the discharge pressure Ppv. The current opening degree is detected using a tachometer such as an encoder or an actual command signal value issued from the air conditioner control unit 10A to the damper 6A.

  The integrated control device 10 is in a state where the difference between the current opening and the target opening, that is, the following degree ΔP in the present embodiment is equal to or greater than the following limit ΔPc and the following degree ΔP is equal to or greater than the following limit ΔPc. Execution of the first control mode is stopped when the preset time Tpc or longer is continued.

  In the present embodiment, the flow rate or pressure of the air flow is controlled and detected using the opening degree of the damper 6A. However, in the present embodiment, the present invention is not limited to this, and the air flowing in the air flow duct 6 is used. The flow rate or pressure of the flow may be controlled and detected directly or indirectly.

(Other embodiments)
In the above-described embodiment, the execution of the first control mode is stopped when the tracking degree ΔP is equal to or greater than the tracking limit ΔPc and the state where the tracking degree ΔP is equal to or greater than the tracking limit ΔPc continues for a time Tpc or longer. The present invention is not limited to this, and the execution of the first control mode may be stopped when the following degree ΔP becomes equal to or more than the following limit ΔPc.

  In the above-described embodiment, the flow rate or pressure of the heat medium or air flow is the direct control parameter, but the present invention is not limited to this, and the flow rate of the heat medium or air flow is the control parameter. Thus, the flow rate or pressure of the heat medium or air flow may be indirectly controlled / detected.

In the above-described embodiment, the target discharge pressure Pset is decreased stepwise, but the present invention is not limited to this, and the target discharge pressure Pset may be decreased continuously.
In the above embodiment, the present invention has been described with the lower limit rotational speed as the specification limit value. However, the present invention is not limited to this, and the present invention can also be applied when the upper limit rotational speed is set as the specification limit value. It is. In this case, for example, the follow-up degree ΔP and the follow-up limit ΔPc may be compared while increasing the target discharge pressure Pset.

In the above-described embodiment, the present invention has been described by taking the secondary pump P2 as an example. However, the present invention is not limited to this, and the present invention can also be applied to the primary pump P1.
In the second control mode according to the above-described embodiment, the heat source unit 7A is set as a control target, but the present invention is not limited to this and can be applied to other devices.

  The air conditioning system according to the above-described embodiment is a system in which the heat medium is circulated between the indoor air conditioner 5 and the heat source unit 7A, but the present invention is not limited to this, and an evaporator is provided in the room. It may be a system in which a refrigerant such as CFC is circulated. In this case, the compressor that transports the refrigerant that is a compressible fluid corresponds to the fluid machine according to the present invention.

Although the heat source unit 7A according to the above-described embodiment is an air cooling type, the present invention is not limited to this, and may be a water cooling type heat source unit 7A.
The heat source device 7A according to the above-described embodiment is a vapor compression refrigerator, but the present invention is not limited to this, and may be, for example, an absorption refrigerator.

  The air conditioning system according to the above-described embodiment is an air conditioning system that air-conditions a server room in which ICT equipment is installed. However, the present invention is not limited to this and can be applied to other air conditioning systems. is there.

  Although the above-mentioned embodiment was an air-conditioning system using cold energy, the present invention is not limited to this, and may be an air-conditioning system that generates heat with the heat source unit 7A and uses the heat. .

  Further, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims. That is, you may combine at least 2 embodiment among 1st-3rd embodiment.

DESCRIPTION OF SYMBOLS 1 ... Air conditioner 5 ... Indoor air conditioner 5A ... Indoor heat exchanger 5B ... Flow control valve 5C ... Indoor air blower 7A ... Heat source machine 7 ... Heat source apparatus 10 ... Integrated control apparatus 10A ... Air conditioner control part 10B ... Secondary pump control part 10C ... Primary pump control unit 10D ... Heat source control unit P1 ... Primary pump P2 ... Secondary pump

Claims (7)

  1. “Heat source machine that generates cold or warm heat used for indoor air conditioning”, “Indoor air conditioner that cools or heats air supplied to the room”, and “Fluid for transporting heat generated by the heat source machine” An air conditioner having at least a fluid machine for supplying the air conditioner to the indoor air conditioner;
    A control device for controlling the operation of the air conditioner, wherein “the first control mode for controlling the air conditioning capacity by changing the flow rate or pressure of the fluid supplied to the indoor air conditioner” and “the air conditioner are configured. A control device capable of executing at least one control mode of “second control mode for controlling an air conditioning capacity by controlling a device other than the fluid machine among devices”;
    A detection device for detecting a flow rate or pressure of a fluid to be circulated in the indoor air conditioner,
    The control device includes:
    A fluid control process executed in the first control mode, the fluid control process for controlling the operation of the fluid machine so that the detection value detected by the detection device approaches a control target value; and the detection value When the difference from the control target value is equal to or greater than a preset value (hereinafter referred to as a follow-up limit), stop processing for stopping execution of the first control mode can be executed. Air conditioning system.
  2. "Heat source machine that generates cold or hot heat used for indoor air conditioning", "Airflow adjustment unit that adjusts the flow rate or pressure of the airflow supplied to the room" and "Heat generated by the airflow and the heat source machine An air conditioner having at least an indoor heat exchanger for exchanging heat with
    A control device for controlling the operation of the air conditioner, wherein “the first control mode for controlling the air conditioning capacity by changing the flow rate or pressure of the air flow supplied into the room” and “the equipment constituting the air conditioner” A control device capable of executing at least one control mode of “second control mode for controlling air conditioning capacity by controlling devices other than the airflow adjustment unit”,
    A detection device for detecting the flow rate or pressure of the air flow,
    The control device includes:
    Fluid control processing executed in the first control mode, wherein the detection value detected by the detection device controls the operation of the airflow adjustment unit so as to approach the control target value, and the detection value When the difference between the control value and the control target value is equal to or greater than a preset value (hereinafter referred to as a tracking limit), a stop process for stopping the execution of the first control mode can be executed. Air conditioning system.
  3.   In the stop process, the difference between the detected value and the control target value (hereinafter referred to as the tracking degree) is equal to or greater than the tracking limit, and the tracking level is equal to or greater than the tracking limit. 3. The air conditioning system according to claim 1, wherein execution of the first control mode is stopped when is continued for a preset time or longer.
  4. The control device includes:
    The air conditioning system according to any one of claims 1 to 3, wherein a transition process for shifting to the second control mode can be executed after the execution of the first control mode is stopped.
  5.   The air conditioning system according to any one of claims 1 to 4, wherein in the second control mode, the heat generated by the heat source device is controlled to vary.
  6. “Heat source machine that generates cold or warm heat used for indoor air conditioning”, “Indoor air conditioner that cools or heats air supplied to the room”, and “Fluid for transporting heat generated by the heat source machine” An air conditioner having at least a fluid machine for supplying the air conditioner to the indoor air conditioner;
    A control device for controlling the operation of the air conditioner, wherein “the first control mode for controlling the air conditioning capacity by changing the flow rate or pressure of the fluid supplied to the indoor air conditioner” and “the air conditioner are configured. A control device capable of executing at least one control mode of “second control mode for controlling an air conditioning capacity by controlling a device other than the fluid machine among devices”;
    Applied to an air conditioning system comprising a detection device for detecting a flow rate or pressure of a fluid circulated in the indoor air conditioner
    In the air conditioning system program incorporated in the control device,
    A fluid control processing executed by the control device in the first control mode, the fluid control processing unit controlling the operation of the fluid machine so that a detection value detected by the detection device approaches a control target value; When the difference between the detected value and the control target value is greater than or equal to a preset value, the air conditioning system is configured to function as a stop processing unit that stops execution of the first control mode. program.
  7. "Heat source machine that generates cold or hot heat used for indoor air conditioning", "Airflow adjustment unit that adjusts the flow rate or pressure of the airflow supplied to the room" and "Heat generated by the airflow and the heat source machine An air conditioner having at least an indoor heat exchanger for exchanging heat with
    A control device for controlling the operation of the air conditioner, wherein “the first control mode for controlling the air conditioning capacity by changing the flow rate or pressure of the air flow supplied into the room” and “the equipment constituting the air conditioner” A control device capable of executing at least one control mode of “second control mode for controlling air conditioning capacity by controlling devices other than the airflow adjustment unit”,
    Applied to an air conditioning system comprising a detection device for detecting the flow rate or pressure of the air flow,
    In the air conditioning system program incorporated in the control device,
    A fluid control processing unit that is a fluid control process that is executed in the first control mode, and that controls the operation of the airflow adjustment unit so that a detection value detected by the detection device approaches a control target value. And a stop processing unit that stops execution of the first control mode when the difference between the detected value and the control target value is equal to or greater than a preset value (hereinafter referred to as a tracking limit). An air-conditioning system program characterized by
JP2015116679A 2015-06-09 2015-06-09 Air conditioning system and air conditioning system program Active JP6453715B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015116679A JP6453715B2 (en) 2015-06-09 2015-06-09 Air conditioning system and air conditioning system program

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015116679A JP6453715B2 (en) 2015-06-09 2015-06-09 Air conditioning system and air conditioning system program

Publications (2)

Publication Number Publication Date
JP2017003181A JP2017003181A (en) 2017-01-05
JP6453715B2 true JP6453715B2 (en) 2019-01-16

Family

ID=57751864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015116679A Active JP6453715B2 (en) 2015-06-09 2015-06-09 Air conditioning system and air conditioning system program

Country Status (1)

Country Link
JP (1) JP6453715B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107763814B (en) * 2017-11-08 2020-01-07 四川虹美智能科技有限公司 Variable frequency air conditioner discharging device, method and system
CN110274361A (en) * 2019-06-21 2019-09-24 珠海格力电器股份有限公司 The control method of water multi-gang air conditioner and its variable frequency pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117036A (en) * 1980-02-20 1981-09-14 Hitachi Ltd Air conditioner
JPS57127738A (en) * 1981-02-02 1982-08-09 Hitachi Ltd Operating device of refrigerator
US8275483B2 (en) * 2009-07-23 2012-09-25 Siemens Industry, Inc. Demand flow pumping
JP5595975B2 (en) * 2011-05-26 2014-09-24 三機工業株式会社 Air conditioning piping system
JP2013040705A (en) * 2011-08-12 2013-02-28 Omron Corp Controller, control method, control program and recording medium
JP6100523B2 (en) * 2012-12-28 2017-03-22 株式会社Nttファシリティーズ Cold water circulation system

Also Published As

Publication number Publication date
JP2017003181A (en) 2017-01-05

Similar Documents

Publication Publication Date Title
JP5984784B2 (en) Hot / cold water air conditioning system
DE102005028405B4 (en) Supercritical heat pump circuit system
ES2700938T3 (en) Cooling cycle apparatus
JP4927335B2 (en) Cooling system with evaporators arranged in series
ES2642164T3 (en) Cooling device
JP5465333B2 (en) Outdoor unit and air conditioner
US9845981B2 (en) Load estimator for control of vapor compression cooling system with pumped refrigerant economization
EP2122276B1 (en) Free-cooling limitation control for air conditioning systems
JP5907247B2 (en) Integrated air conditioning system and its control device
WO2009119023A1 (en) Freezing apparatus
JP2004522132A (en) Method and apparatus for controlling heat removal from a condenser in a cooling system
JP2013178058A (en) Air conditioner
US20130261809A1 (en) Hvac control system and method
JP4566052B2 (en) Constant temperature maintenance device.
JP5524571B2 (en) Heat pump equipment
KR20110097203A (en) Heat pump system and control method thereof
KR20030097179A (en) Heat-Pump Air Conditioner&#39;s Operating Method
EP2102571B1 (en) Free-cooling capacity control for air conditioning systems
EP2102569B1 (en) Methods and systems for controlling an air conditioning system operating in free cooling mode
EP2610558A2 (en) Heat pump apparatus and control method of heat pump system
US8522568B2 (en) Refrigeration system
ES2679124T3 (en) Air conditioner control procedure
CN105318460B (en) Control system, control method and apply its handpiece Water Chilling Units
US20110314853A1 (en) Cooling system
US9909790B2 (en) Methods and systems for controlling integrated air conditioning systems

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180201

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20181126

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20181211

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20181213

R150 Certificate of patent or registration of utility model

Ref document number: 6453715

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150