CN105091254B - Control device - Google Patents
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- CN105091254B CN105091254B CN201410158206.7A CN201410158206A CN105091254B CN 105091254 B CN105091254 B CN 105091254B CN 201410158206 A CN201410158206 A CN 201410158206A CN 105091254 B CN105091254 B CN 105091254B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
A control device for controlling a refrigeration apparatus having a main fan and an auxiliary fan, the refrigeration apparatus including an outdoor unit (20) and a booster fan (32) attached to the outdoor unit (20) for assisting an outdoor fan (25), the outdoor unit having an outdoor heat exchanger and the outdoor fan (25) for supplying outdoor air to the outdoor heat exchanger and being capable of changing the number of rotations, fan drive degrees out of a plurality of fan drive degrees for the outdoor fan (25) are determined in advance as a start drive corresponding value for starting the driving of the booster fan (32), and the determined start drive corresponding value is corrected in accordance with the driving or stopping condition of the booster fan (32), thereby enabling to suppress an increase in power consumption when a desired air volume is obtained.
Description
Technical Field
The invention relates to control devices.
Background
In the conventional refrigeration apparatus, when the heat source unit includes a main fan whose rotation number is variable, an auxiliary fan is further provided in the heat source unit to assist the main fan. For example, in a refrigeration device disclosed in patent document 1 (japanese patent application laid-open No. 2013-50222), an outdoor fan corresponding to a main fan and an auxiliary fan corresponding to an auxiliary fan are controlled to be driven at the same rotation number in an interlocking manner.
However, for example, when the low load operation is performed, the desired air volume is small, and the desired air volume may be obtained by driving only the main fan. In this case, if not only the main fan but also the sub fan is driven, power consumption may be increased.
Disclosure of Invention
The invention aims to provide control devices capable of suppressing increase of power consumption when a desired air volume is obtained in a refrigeration device having a main fan and an auxiliary fan.
The control device according to of the present invention is a control device for controlling a refrigeration device including a heat source unit and an auxiliary fan attached to the heat source unit for assisting a main fan, the heat source unit including a heat source-side heat exchanger and the main fan that sends outdoor air to the heat source-side heat exchanger and can change a rotation number, the control device including a memory unit in which rotation number instruction values out of a plurality of rotation number instruction values of the main fan are stored in advance, the rotation number instruction values being values corresponding to a start of driving the auxiliary fan, and a correction unit that corrects the determined value corresponding to the start of driving according to a driving or stopping state of the auxiliary fan.
In the control device according to of the present invention, of the plurality of rotation number instruction values of the main fan stored in advance in the memory unit are determined as drive start corresponding values for starting driving of the sub fan, and the correction unit corrects the drive start corresponding values in accordance with the drive or stop conditions of the sub fan.
According to this configuration, in the refrigeration apparatus including the main fan and the sub-fan, an increase in power consumption can be suppressed when a desired air volume is obtained.
According to the control device of the second aspect of the invention, in the control device of the aspect, there is an upper limit in the start drive correspondence value.
Here, when the desired air volume is large, the power consumption when the main fan and the sub fan are interlocked to obtain the desired air volume tends to be smaller than when the main fan is driven only to obtain the desired air volume.
In the control device according to the second aspect of the invention, the start-driving correspondence value is provided with an upper limit. Since the larger the rotation instruction value is, the larger the air volume of the main fan becomes, and when the desired air volume is large, the rotation instruction value designated for the main fan also becomes large. In this control device, even if the desired air volume is large, the driving of the sub-fan is started because the upper limit is set to the rotation speed instruction value determined to start driving the corresponding value. Therefore, it is difficult to use the sub-fan in spite of a large desired air volume.
According to this configuration, when a desired air volume is obtained, an increase in power consumption due to the absence of the auxiliary fan can be suppressed.
According to the control device of the third aspect of the present invention, in the control device of the th or the second aspect, there is a lower limit in the start drive correspondence value.
Here, when the desired air volume is small, denier is determined as the rotation number instruction value corresponding to the start of driving, and the desired air volume can be obtained only by the main fan, and the sub fan is also driven in some cases, denier makes the main fan and the sub fan interlock to obtain the desired air volume, and the power consumption may be increased compared with the case where the desired air volume is obtained only by driving the main fan.
In the control device according to the third aspect of the invention, a lower limit is set in the start-of-driving correspondence value. Since the smaller the rotation speed instruction value for the main fan, the smaller the air volume of the main fan, the smaller the rotation speed instruction value specified for the main fan when the desired air volume is small. In this control device, since the lower limit is set in the rotation speed instruction value determined as the start drive correspondence value, the sub fan is not driven even if the start drive correspondence value is corrected to reduce the desired air volume. Therefore, it is also difficult to occur a situation in which the auxiliary fan is driven although a desired air volume can be obtained only by the main fan.
According to this configuration, when a desired air volume is obtained, an increase in power consumption due to the use of the sub-fan can be suppressed.
According to the control device of the fourth aspect of the present invention, in the control device of any of the through the third aspect of the present invention, the correction to increase the start drive correspondence value is performed when the driving or stopping of the sub fan is repeated a predetermined number of times within the 1 st predetermined time.
Here, when the driving or stopping of the sub fan is repeated at short time intervals, the air volume of the sub fan may be considered excessive for the air volume balance of the main fan and the sub fan required to satisfy the desired air volume.
In the control device according to the fourth aspect of the present invention, the correction to increase the start drive correspondence value is performed when the driving or stopping of the sub fan is repeated a predetermined number of times within the 1 st predetermined time. By performing this correction, the rotation number instruction value of the main fan at the time of starting driving the sub fan is changed to a rotation number instruction value larger than the rotation number instruction value before the correction. As a result, even if the main fan is driven based on the rotation number instruction value before the correction of the drive start correspondence value, the sub fan does not start driving. Therefore, when the air volume of the sub fan becomes excessive in the air volume balance between the main fan and the sub fan required to satisfy the desired air volume, it is difficult to start driving the sub fan.
With this configuration, the possibility of starting the driving of the sub-fan when the air volume of the sub-fan is not required can be reduced.
According to the control device of the fifth aspect of the present invention, in the control device of any of of through the fourth aspect of the present invention, the main fan performs correction of the reduced driving start correspondence value when driving for more than 2 nd predetermined time in accordance with the rotation indication value lower than the predetermined rotation indication value.
Here, if the desired air volume is not small, the power consumption when the main fan and the sub fan are interlocked to obtain the desired air volume is smaller than the power consumption when only the main fan is allowed to obtain the desired air volume.
In the control device according to the fifth aspect of the present invention, when the main fan is driven for more than 2 nd predetermined time based on the rotation number instruction value lower than the predetermined rotation number instruction value, correction is performed to lower the drive start corresponding value, and by performing the correction, the rotation number instruction value corresponding to the main fan is changed to the rotation number instruction value smaller than the rotation number instruction value before the correction when the drive of the sub fan is started, and as a result, the sub fan is started to be driven when the main fan is driven based on the rotation number instruction value before the correction of the drive start corresponding value.
According to this configuration, when a desired air volume is obtained, an increase in power consumption due to the absence of the auxiliary fan can be suppressed.
According to the control device of the sixth aspect of the present invention, in the control device of any one of from the th to the fifth aspect of the present invention, when the driving of the main fan is started, the driving or stopping of the sub-fan is controlled based on the rotation number instruction value for the main fan determined based on the outdoor air temperature value.
Here, there is a fixed relationship between the air conditioning load and the outdoor air temperature, and therefore, by determining the air volume to be supplied to the heat source side heat exchanger based on the outdoor air temperature, the air volume suitable for the air conditioning load, that is, the desired air volume can be easily adjusted.
In the control device according to the sixth aspect of the present invention, the driving or stopping of the sub-fan is controlled in accordance with the rotation number instruction value for the main fan determined based on the outdoor air temperature value. Therefore, the driving or stopping of the auxiliary fan can be determined indirectly according to the temperature value of the outdoor air.
With this configuration, the air volume can be easily adjusted to an air volume suitable for the air conditioning load.
According to the control device of the seventh aspect of the present invention, in the control device of any of the through the sixth aspect, the rotation number instruction value further includes a stop drive corresponding value which is determined in advance to stop driving of the sub fan, and the stop drive corresponding value is a value different from the start drive corresponding value.
Effects of the invention
According to the control device of of the present invention, in the cooling device having the main fan and the sub-fan, it is possible to suppress an increase in power consumption when a desired air volume is obtained.
In the control device according to the second aspect of the present invention, it is possible to suppress an increase in power consumption caused by not using the sub-fan when a desired air volume is obtained.
In the control device according to the third aspect of the present invention, it is possible to suppress an increase in power consumption due to the use of the auxiliary fan when a desired air volume is obtained.
In the control device according to the fourth aspect of the present invention, when a desired air volume is obtained, it is possible to reduce the possibility that the auxiliary fan starts to be driven although the air volume of the auxiliary fan is not required.
In the control device according to the fifth aspect of the present invention, it is possible to suppress an increase in power consumption caused by not using the sub-fan when a desired air volume is obtained. .
In the control device according to the sixth aspect of the present invention, the air volume can be easily adjusted to the air conditioning load air volume.
In the control device according to the seventh aspect of the present invention, it is possible to suppress the occurrence of hunting due to the driving or stopping of the sub fan.
Drawings
FIG. 1 is a schematic view of a heat source device;
fig. 2 is a control block diagram of a control device included in the air conditioning device;
fig. 3 is a diagram showing a relationship between a fan driving degree of an outdoor fan and an air volume/static pressure of the outdoor fan;
fig. 4 is a diagram showing a relationship between a fan driving degree of an outdoor fan and air volumes/static pressures of the outdoor fan and a booster fan;
(symbol description)
20 outdoor unit (Heat source unit)
25 outdoor fan (Main fan)
32 supercharging fan (auxiliary fan)
60 control device
Detailed Description
Next, a control device 60 according to an embodiment of the present invention will be described with reference to the drawings, and the embodiment 60 according to the present invention is not limited to the embodiment described below, and various modifications can be made without departing from the scope of the technical idea of the present invention.
(1) Structure of control device 60
Fig. 1 is a side view of a heat source device 10, fig. 2 is a control block diagram of a control device 60 included in an air-conditioning apparatus, fig. 60 relates to an embodiment of the present invention, and is a control device 60 for controlling a refrigeration apparatus including a heat source unit and an auxiliary fan attached to the heat source unit, the refrigeration apparatus is an air-conditioning apparatus for providing cooling and heating to an interior of a building such as a building by performing, for example, a vapor compression refrigeration cycle operation, the air-conditioning apparatus is configured by connecting the heat source device 10 and an indoor unit (not shown) provided as a use unit in the interior of the building such as the building via a connection pipe (not shown), and the control device 60 is configured by a heat source side control unit 62 of the heat source device 10, a use side control unit 61 of the indoor unit, and a transmission line connecting the heat source side control unit 62 and the use side control unit 61, and controls the operation of the entire air-conditioning apparatus.
Next, the heat source device 10 will be explained first.
(2) Structure of heat source device 10
The heat source device 10 includes an outdoor unit 20 as a heat source unit, a pipe member 40, a fan unit 30 having a booster fan 32 as a sub-fan, and a heat source side control portion 62.
(2-1) outdoor Unit 20
The outdoor unit 20 of the present embodiment is provided in a building. The outdoor unit 20 includes a casing 21, a compressor 22, a four-way switching valve 23, an expansion valve 24 as an expansion mechanism, an outdoor heat exchanger (not shown) as a heat source side heat exchanger, and an outdoor fan 25 as a main fan. The compressor 22, the four-way switching valve 23, the expansion valve 24, the outdoor heat exchanger, and the outdoor fan 25 are disposed in the casing 21.
The casing 21 has, for example, a rectangular parallelepiped shape, and a suction port 21a for sucking outdoor air into the casing 21 is provided in a side surface thereof. The suction port 21a is disposed opposite to a ventilation opening for communicating the outside and the inside of a building, for example, so as to suck outdoor air. An installation portion 21c for attaching the fan unit 30 is provided on the upper surface of the housing 21. The installation portion 21c is provided with an air outlet 21b that opens upward.
Further, the electric component box 26 is accommodated in the housing 21. The heat source-side controller 62 is disposed in the electrical component box 26.
The compressor 22 is a compressor capable of changing an operation capacity, and compresses a refrigerant flowing in a refrigerant circuit, the four-way switching valve 23 is a valve for switching a flow direction of the refrigerant, and switches a flow direction of the refrigerant in the refrigerant circuit so that an outdoor heat exchanger functions as a condenser and an indoor heat exchanger functions as an evaporator during a cooling operation, and switches a flow direction of the refrigerant in the refrigerant circuit so that the four-way switching valve 23 functions as a condenser and the outdoor heat exchanger functions as an evaporator during a heating operation, the outdoor heat exchanger functions as a condenser during the cooling operation by exchanging heat with air sent from an outdoor fan 25, and functions as an evaporator during the heating operation, and the expansion valve 24 is an electric expansion valve connected to a liquid side of the outdoor heat exchanger for adjusting a pressure, a flow rate, and the like of the refrigerant flowing in the refrigerant circuit.
The outdoor fan 25 is a fan that can supply outdoor air to the outdoor heat exchanger by rotation. More specifically, the outdoor fan 25 sucks outdoor air into the casing 21 through the suction port 21a, exchanges heat with the refrigerant in the outdoor heat exchanger, and then blows the air after the heat exchange out of the casing 21 through the blow-out port 21 b. The outdoor fan 25 is a fan controlled by an inverter capable of changing the amount of air supplied to the outdoor heat exchanger, and a propeller fan is used in the present embodiment.
The outdoor fan 25 mainly includes an outdoor fan motor 25m, a hub 25a attached to a rotation shaft of the outdoor fan motor 25m, and a plurality of blades 25b arranged on an outer periphery of the hub 25 a. the outdoor fan motor 25m is connected to an outdoor fan motor driving unit 64 having a heat source side controller 62. the outdoor fan motor driving unit 64 drives the outdoor fan motor 25m or stops driving the outdoor fan motor 25m by supplying or cutting off electric power, and the outdoor fan motor driving unit 64 supplies electric power to drive the outdoor fan motor 25m at a specified rotation number in accordance with a specified rotation number control signal received from a fan controller 63 having the heat source side controller 62. furthermore, the outdoor fan motor driving unit 64, stops supplying electric power to the outdoor fan motor 25m upon receiving a signal to stop driving the outdoor fan from the fan controller 63.
(2-2) pipe Member 40
The pipe member 40 is a duct for guiding air blown out from the outdoor unit 20 to the outside. As the pipe member 40, members having different lengths or shapes are adopted depending on the installation environment of the outdoor unit 20 and the like.
The pipe member 40 is provided with an exhaust port 41 on the end side, the exhaust port 41 is an air outlet from the outdoor unit 20 side in the pipe member 40, the exhaust port 41 of the pipe member 40 is provided so as to face the louver 80, and a damper (not shown) capable of opening and closing the exhaust port 41 is provided in the vicinity of the exhaust port 41, so that the exhaust port 41 communicating with the outside of the room can be closed when the air conditioner is stopped.
The other end side of the pipe member 40 is provided with a suction port 42. in the pipe member 40, the suction port 42 is an air inlet port for blowing air from the outdoor unit 20 side, and the pipe member 40 is connected to the fan unit 30 so that air blown from the outdoor unit 20 side flows into the suction port 42.
(2-3) Fan Unit 30
The fan unit 30 is additionally provided between the outdoor unit 20 and the duct unit 40 in order to compensate for the insufficient air volume of the outdoor fan 25 due to the pressure loss in the duct unit 40. The fan unit 30 includes a fan case 31, and a booster fan 32.
The fan case 31 has, for example, a rectangular parallelepiped shape, and accommodates the booster fan 31 therein. An upper surface side communication opening 31a is formed in an upper surface of the fan case 31. The pipe member 40 is fixed to the upper surface of the fan case 31 such that the air inlet 42 and the upper surface side communication opening 31a face each other. A lower surface side communication opening 31b is formed in the lower surface of the fan case 31. The lower surface of the fan case 31 is fixed to the installation portion 21c of the casing 21 so that the lower surface side communication opening 31b and the air outlet 21b face each other.
The booster fan 32 has a function of assisting the outdoor fan 25 by rotating. The booster fan 32 is a fan having a fixed number of revolutions, i.e., a so-called constant speed fan, and a propeller fan is used in the present embodiment.
The booster fan 32 mainly includes a booster fan motor 32m, a hub 32a attached to a rotating shaft of the booster fan motor 32m, and a plurality of blades 32b disposed on an outer periphery of the hub 32 a. The booster fan motor 32m is connected to the booster fan motor drive section 65. The booster fan motor drive unit 65 is disposed in an electrical component box (not shown) disposed in the fan case 31. A fan motor driving section 65 is added to drive the booster fan motor 32m by supplying or cutting off electric power, or to stop driving the booster fan motor 32 m. When the fan unit 30 is attached to the outdoor unit 20, the supercharging fan motor drive unit 65 of the present embodiment is connected to the heat source side control unit 62. The booster fan motor drive unit 65 receives a drive or stop signal from the fan control unit 63 having the heat source side control unit 62, and supplies power to drive the booster fan motor 32m or stops supplying power to the booster fan motor 32 m.
According to this configuration, , as the air flow in the heat source device 10, the outdoor fan motor 25m is driven, and the outdoor air is sucked into the casing 21 from the suction port 21a through the ventilation opening by the rotation of the blades 25b, and the sucked outdoor air is heat-exchanged by the outdoor heat exchanger and then blown out from the discharge port 21b, at this time, the booster fan motor 32m is driven, and the air discharged from the discharge port 21b is sucked into the fan case 31 by the rotation of the blades 32b, and is discharged to the outside from the discharge port 41 of the pipe member 40 through the louver 80 through the pipe member 40, and of course, the outdoor air blown out from the discharge port 21b is discharged to the outside from the discharge port 41 of the pipe member 40 through the louver 80 through the pipe member 40 after being sucked from the suction port 21a and supplied to the outdoor heat exchanger by driving the outdoor fan motor 25m, even without driving the booster fan motor.
Although the booster fan motor driver 65 of the present embodiment receives a drive or stop signal from the fan controller 63 having the heat source side controller 62 and supplies/stops electric power to the booster fan motor 32m, the present invention is not limited to this, and the fan unit 30 may independently include a controller that generates a drive or stop signal for the booster fan motor driver 65, and in the present embodiment, the outdoor unit 20 and the fan unit 30 have different power supplies, respectively.
(2-4) Heat Source side control section 62
The heat source-side controller 62 is disposed inside the electrical component box 26 of the outdoor unit 20. The heat source-side controller 62 includes a CPU, a memory, and the like, and controls the operation of various devices included in the heat source device 10.
(3) Specific structure of heat source side controller 62
The heat source side controller 62 will be described in detail below with reference to the drawings. The heat source side controller 62 is connected to the compressor 22, the four-way switching valve 23, the expansion valve 24, the outdoor fan motor 25m, the booster fan motor driver 65, and various sensors. The various sensors include an outdoor air temperature sensor 90, a suction pressure sensor 92, and a discharge pressure sensor 91. Outdoor air temperature sensor 90 is a sensor necessary for detecting the outdoor air temperature around outdoor unit 20, and is provided near suction port 21 a. The suction pressure sensor 92 is a sensor required to detect the suction pressure of the compressor 22, and is provided between the four-way switching valve 23 and the suction side of the compressor 22 in the refrigerant circuit. The discharge pressure sensor 91 is a sensor required to detect the discharge pressure of the compressor 22, and is provided between the four-way switching valve 23 and the discharge side of the compressor 22 in the refrigerant circuit. The heat source-side controller 62 includes a fan controller 63.
The fan controller 63 controls the operations of the outdoor fan 25 and the booster fan 32. Specifically, the fan control unit 63 supplies a predetermined rotation number control signal for driving the outdoor fan 25m at a predetermined rotation number to the outdoor fan motor drive unit 64 to drive the outdoor fan 25. The fan control unit 63 transmits a signal for stopping driving the outdoor fan, which stops driving the outdoor fan motor 25m, to the outdoor fan motor driving unit 64 to stop driving the outdoor fan 25. The fan control unit 63 sends a drive/stop signal of the booster fan 32, that is, a signal for starting the drive of the booster fan and a signal for stopping the drive of the booster fan, to the booster fan motor drive unit 65 to drive the booster fan 32 or stop the drive of the booster fan 32.
In addition, when the signals transmitted to the outdoor fan motor drive unit 64 and/or the booster fan motor drive unit 65 are the same as the signals transmitted last time, the signals may not be transmitted from the fan control unit 63 to the outdoor fan motor drive unit 64 and/or the booster fan motor drive unit 65. The fan control unit 63 further includes an acquisition unit 63a, a storage unit 63b, a determination unit 63c, and a signal generation unit 63 d.
(3-1) acquisition unit 63a
When the user inputs an operation stop instruction via a remote controller (not shown) or the like, the acquisition unit 63a sends the operation stop instruction to the signal generation unit 63 d. When the user inputs an operation introduction command via the remote controller, the acquisition unit 63a acquires the current outdoor air temperature detected by the outdoor air sensor 90, and sends the operation introduction command and the acquired outdoor air temperature to the determination unit 63c as an outdoor air temperature value.
The acquiring unit 63a acquires the suction pressure detected by the suction pressure sensor 92 and the discharge pressure detected by the discharge pressure sensor 91 at predetermined intervals, and sends the acquired suction pressure and discharge pressure to the determining unit 63 c.
(3-2) memory 63b
Fig. 3 is a diagram showing a relationship between the fan drive rate of the outdoor fan 25 and the air volume/static pressure of the outdoor fan 25. Fig. 4 is a diagram showing a relationship between the fan driving degree of the outdoor fan 25 and the air volume/static pressure of the outdoor fan 25 and the booster fan 32.
The memory 63b stores a rotation table (not shown) in advance. The rotation number table indicates the rotation number of the outdoor fan motor 25 defined for each of the plurality of fan drive degrees of the outdoor fan 25. The determination unit 63c specifies the fan driving degree by referring to the revolution table stored in the storage unit 63 b. In addition, the fan driving degree of the present embodiment is 0 to 11, and is set in stages so that "0" is stopped, "1" is the minimum rotation number, and "11" is the maximum rotation number.
The memory 63b stores fan drive degrees out of the fan drive degrees for the outdoor fans 25 in advance as drive start correspondence values for starting the drive of the booster fan 32, the memory 63b stores fan drive degrees out of the fan drive degrees for the outdoor fans 25, which are stored in advance as drive start correspondence values, in advance as drive stop correspondence values for stopping the drive of the booster fan 32, and the fan drive degree "6" and the fan drive degree "3" are determined in advance as drive stop correspondence values in the present embodiment.
The storage 63b stores the fan driving degree of the outdoor fan 25 designated by the determination 63 c. When the drive start correspondence value is corrected by the determination unit 63c, the storage unit 63b also stores the corrected latest drive start correspondence value.
(3-3) determination section 63c
, when the judging unit 63c receives the operation introduction command and the temperature value of the outdoor air from the acquiring unit 63a, it judges the fan driving degree at the time of starting driving the outdoor fan 25 based on the temperature value of the outdoor air received from the acquiring unit 63a, and specifies the judged fan driving degree, further, when the judging unit 63c of the present embodiment specifies the fan driving degree at the time of starting driving the outdoor fan 25 based on the temperature value of the outdoor air and the operation condition, specifically, when the outdoor air temperature exceeds 20 degrees and the operation introduction command of the cooling operation is input, the judging unit 63c judges the fan driving degree as "6" and specifies it, further , when the outdoor air temperature is lower than 20 degrees and the operation introduction command of the cooling operation is input, the judging unit 63c judges the fan driving degree as "1" and specifies it, further, when the outdoor air temperature is lower than 20 degrees and the operation introduction command of the heating operation is input, the judging unit 63c judges the fan driving degree as "11" and specifies it, further, when the outdoor air temperature exceeds , the operation introduction command is input, and the heating unit judges it as "1".
The determination unit 63c determines the fan driving degree at which the driving of the rear outdoor air fan 25 is started based on the operation load, and specifies the determined fan driving degree. In the present embodiment, the determination unit 63c determines the fan driving degree of the outdoor fan 25 after the start of driving, based on the refrigerant pressure of the compressor 22, and specifies the determined fan driving degree. Specifically, the determination unit 63c determines and specifies the fan driving degree of the outdoor fan 25 so that the suction pressure and the discharge pressure delivered from the acquisition unit 63a reach desired target values, respectively. In the present embodiment, the fan driving degree determined by the determination unit 63c is such that the suction pressure and the discharge pressure delivered from the acquisition unit 63a reach desired target values, respectively. However, the fan driving degree determined by the determination unit 63c may be such that the pressure difference between the suction pressure and the discharge pressure delivered from the acquisition unit 63a reaches a desired target pressure difference.
The determination unit 63c determines whether or not the booster fan 32 needs to be driven based on the start drive correspondence value. That is, the determination unit 63c determines whether to drive or stop the booster fan 32 based on the drive start correspondence value stored in the storage unit 63b and the fan drive degree of the designated outdoor fan 25.
Specifically, the determines that the determination unit 63c determines that the booster fan 32 needs to be driven when the operation introduction instruction is received from the acquisition unit 63a and the memory unit 63b compares the previously stored start drive correspondence value with the fan drive degree of the designated outdoor fan 25, and when the fan drive degree of the designated outdoor fan 25 is larger than the fan drive degree (in the present embodiment, "6") determined in advance as the start drive correspondence value, that is, when "6" or "11" is designated as the fan drive degree of the outdoor fan 25 at the start of driving in the present embodiment, the determination unit 63c determines that the booster fan 32 needs to be driven, and when the fan drive degree of the designated outdoor fan 25 is smaller than the fan drive degree (in the present embodiment, "6") determined in advance as the start drive correspondence value, the determination unit 63c determines that the booster fan 32 does not need to be driven, that is, that the determination unit 63c determines that the booster fan 32 does not need to be driven, that "1" is designated as the fan drive degree of the fan 25 at the start of driving in the present embodiment.
When the air conditioner starts to operate, the determination unit 63c determines whether or not it is necessary to drive the booster fan 32, and thereafter, determines whether or not it is necessary to drive the booster fan 32 during the operation of the air conditioner.
For example, when the air conditioner is operating and the booster fan 32 is driven, the determination unit 63c compares the stop driving correspondence value stored in advance in the memory unit 63b with the fan driving degree of the designated outdoor fan 25, and when the fan driving degree of the designated outdoor fan 25 is greater than the fan driving degree (in the present embodiment, "3") determined in advance as the stop driving correspondence value, the determination unit 63c determines that it is necessary to drive the booster fan 32, that is, when the fan driving degree of the designated outdoor fan 25 is smaller than the fan driving degree (in the present embodiment, "3") determined in advance as the stop driving correspondence value, the determination unit 63c determines that it is necessary to drive the booster fan 32, and , when the fan driving degree of the designated outdoor fan 25 is smaller than the fan driving degree (in the present embodiment, "3"), the determination unit 63c determines that it is not necessary to drive the booster fan 32, that it is unnecessary to drive the booster fan 32, that the fan driving degree of the designated outdoor fan 25 is equal to the fan driving degree of "0" 633 ".
Further, for example, when the air conditioner is operating and the booster fan 32 is not driven, the determination unit 63c compares the start drive correspondence value stored in the memory unit 63b with the fan drive degree of the designated outdoor fan 25, and when the fan drive degree of the designated outdoor fan 25 is larger than the fan drive degree stored in the memory unit 63b and determined as the start drive correspondence value, the determination unit 63c determines that the booster fan 32 needs to be driven, and when the fan drive degree of the designated outdoor fan 25 is smaller than the fan drive degree stored in the memory unit 63b and determined as the start drive correspondence value, the determination unit 63c determines that the booster fan 32 does not need to be driven, .
More specifically, when the fan driving degrees "6" and "3" of the outdoor fan 25 are specified as a predetermined number of times (for example, 1) alternating within a 1 st predetermined time (for example, 10 minutes), the determination unit 63c corrects the start driving correspondence value, and more specifically, when the fan driving degrees of the indoor fan 25 within the 1 st predetermined time are specified as "6" and "3" in this embodiment, the determination unit 63c corrects the start driving correspondence value to increase the start driving correspondence value, and when the fan driving degrees of the indoor fan 25 within the 1 st predetermined time are specified as "6" and "3" and "6", the determination unit 63c corrects the start driving correspondence value to increase the start driving correspondence value, and when the start driving correspondence value is corrected to increase the start driving correspondence value, the fan driving degrees of of the fan driving degrees determined as the start driving correspondence value may be increased by , that is the current drive correspondence value, that is the fan driving correspondence value to be "6", and the fan driving range to start driving correspondence value to "7" may be set when the fan driving degree is changed to the start driving correspondence value.
Further, in the present embodiment, when the outdoor fan 25 is driven for more than the 2 nd predetermined time in a state of being lower than the predetermined fan driving degree, the determination unit 63c corrects the start driving correspondence value, and when the fan driving degree exceeding the 2 nd predetermined time (for example, 20 minutes) as the fan driving degree of the outdoor fan 25 is specified as less than "6" during the operation of the air conditioning apparatus, the determination unit 63c corrects the start driving correspondence value to be lowered, and when the start driving correspondence value is lowered, the fan driving degree specified as the start driving correspondence value may be lowered by driving degrees driving degrees, that is, when the current start driving correspondence value is determined as the fan driving degree "7", the start driving correspondence value may be changed from the current fan driving degree "7" to the fan driving degree "6" by performing the correction.
In addition, a lower limit may be set in the fan driving degree determined as the driving start correspondence value, and in the present embodiment, when the correction is performed to lower the driving start correspondence value, the fan driving degree is determined as the driving start correspondence value within a range greater than "6".
When the correction is performed, the determination unit 63c determines whether or not the booster fan 32 needs to be driven based on the corrected start drive correspondence value. Specifically, the determination unit 63c compares the corrected start drive correspondence value stored in the storage unit 63b with the fan drive degree of the designated outdoor fan 25. When the fan drive degree of the designated outdoor fan 25 is higher than the fan drive degree determined as the corrected drive start correspondence value, the determination unit 63c determines that the booster fan 32 needs to be driven. In addition, when the booster fan 32 is driven, even when the start-driving correspondence value is corrected, it is determined that the booster fan 32 needs to be driven until the fan driving degree lower than the fan driving degree determined as the stop-driving correspondence value is specified.
The determination unit 63c determines whether or not the booster fan 32 needs to be driven, for example, at predetermined time intervals. In addition, when the outdoor fan 25 and the booster fan 32 are stopped in the state where the defrosting operation is performed, the driving stop of the booster fan 32 during the defrosting operation may not be calculated when the correction for increasing the driving start correspondence value is performed.
(3-4) Signal generating section 63d
Specifically, upon receiving the operation stop command from the acquisition unit 63a, the signal generation units 63d, generate a signal for stopping driving the outdoor fan and a signal for stopping driving the booster fan, and output the generated signals to the fan control unit 63, and upon receiving the determination result from the determination unit 63c, the signal generation units 63d, generate a signal for stopping driving the outdoor fan and a signal for stopping driving the booster fan, and output the generated signals to the fan control unit 63, and upon receiving the determination result from the determination unit 63c, the signal generation units 63d, generate a predetermined rotation number control signal for controlling the rotation number of the outdoor fan motor 25m to the fan driving degree specified by the determination unit 63d, and output the generated signals to the fan control unit 63.
The signal generating units 63d, generate a signal for starting driving the booster fan and output the generated signal to the fan control unit 63 upon receiving the result of determination from the determining unit 63c that the booster fan 32 needs to be driven, and the signal generating units 63d, generate a signal for stopping driving the booster fan and output the generated signal to the fan control unit 63 upon receiving the result of determination from the determining unit 63c that the booster fan 32 does not need to be driven.
(4) Feature(s)
（4-1）
For example, if the outdoor fan 25 and the booster fan 32 are interlocked, even if the fan drive degree of the outdoor fan 25 is reduced from "6" to "3" as shown in fig. 4, since the fan drive degree cannot be reduced to be lower than the static pressure of the booster fan 32, when the fan drive degree of the outdoor fan 25 is in the range of "3" to "6", the total air volume generated by the outdoor fan 25 and the booster fan 32 becomes the sum of the air volume of the outdoor fan 25 at the fan drive degree "6" and the air volume of the booster fan 32, as described above, cannot be adjusted, and particularly, when the air volume is operated at a low load, the air volume suitable for the air conditioning load may not be obtained.
However, although the desired air volume is small in the low load operation and the like, and the desired air volume can be obtained by driving only the main fan, may drive the sub-fan depending on the air volume of the main fan after the driving start correspondence value is fixed to the predetermined fan driving degree, and the power consumption may increase as a whole.
Thus, in the present embodiment, the drive start corresponding value determined in advance is corrected in accordance with the driving or stopping state of the booster fan 32. By performing this correction, the fan drive degree to the outdoor fan 25 changes when the booster fan 32 starts to be driven, and therefore the air volume of the outdoor fan 25 changes when the booster fan 32 starts to be driven. Therefore, the present invention can be applied to a case where a desired air volume can be obtained only by driving the outdoor fan 25 without driving the booster fan 32.
According to this configuration, in the refrigeration apparatus including the outdoor fan 25 and the booster fan 32, an increase in power consumption can be suppressed when a desired air volume is obtained.
Further, by using the booster fan 32, the amount of air supplied to the outdoor heat exchanger can be increased, and the usable temperature range can be expanded while improving the performance. Also, the fan unit 30 may be utilized as a kit required for improving the performance of the heat source device 10.
（4-2）
Here, when the desired air volume is large, the power consumption when the outdoor fan 25 and the booster fan 32 are linked to obtain the desired air volume tends to be smaller than when only the outdoor fan 25 is driven to obtain the desired air volume.
In the present embodiment, the higher the fan driving degree is, the higher the rotation number of outdoor fan motor 25m is, and the larger the air volume generated by outdoor fan 25 is. Therefore, when the desired air volume is large, the specified fan driving degree becomes large. An upper limit is set in the determined drive start correspondence value. Therefore, even if the correction starts to drive the corresponding value, the booster fan 32 starts to be driven when the desired air volume is large. Therefore, it is difficult to use the booster fan 32 in spite of a large desired air volume.
According to this configuration, when a desired air volume is obtained, an increase in power consumption due to the absence of the booster fan 32 can be suppressed.
（4-3）
Here, when the desired air volume is small, is determined to have a small fan driving degree at which the driving of the corresponding value is started, and although the desired air volume can be obtained only by the outdoor fan 25, the booster fan 32 may be driven, and in this case, may drive the outdoor fan 25 and the booster fan 32 to obtain the desired air volume, which may increase power consumption compared to the case where the desired air volume is obtained by driving only the outdoor fan 25.
In the present embodiment, the smaller the fan driving degree is, the lower the number of revolutions of the motor 25m of the outdoor fan is, and the smaller the air volume generated by the outdoor fan 25 is. Therefore, the fan drive rate specified when the desired air volume is small becomes small. A lower limit is set in the fan drive degree determined as the start drive correspondence value. Therefore, even if the correction start drive corresponding value is used, the booster fan 32 will not start to be driven when the desired air volume is small. Therefore, it is difficult to occur a situation where the booster fan 32 is driven although a desired air volume can be obtained only by the outdoor fan 25.
According to this configuration, when a desired air volume is obtained, an increase in power consumption due to the use of the booster fan 32 can be suppressed.
（4-4）
When the driving and stopping of the booster fan 32 are repeated at short time intervals, it is considered that the air volume of the booster fan 32 is excessive in terms of the air volume balance between the outdoor fan 25 and the booster fan 32 having desired air volumes.
In the present embodiment, when the driving or stopping of the booster fan 32 is repeated a predetermined number of times within the 1 st predetermined time, the correction is performed to increase the drive start correspondence value. By performing this correction, the fan drive degree of the outdoor fan 25 at the time of starting driving of the booster fan 32 becomes a drive degree larger than the fan drive degree before the correction. As a result, even if the outdoor fan 25 is driven with the fan drive degree before the start drive correspondence value is corrected, the booster fan does not start to be driven. Therefore, in the air volume balance between the outdoor fan 25 and the booster fan 32 having the desired air volume, when the air volume of the booster fan 32 becomes excessive, it is difficult to start driving the booster fan 32.
With this configuration, the possibility of starting driving the booster fan 32 even though the air volume of the booster fan 32 is not required can be reduced.
（4-5）
If the desired air volume is too small, the power consumption for achieving the desired air volume by linking the outdoor fan 25 and the booster fan 32 may be reduced as compared with the case where the desired air volume is achieved by driving only the outdoor fan 25.
In the present embodiment, when the outdoor fan 25 is driven at a fan driving degree lower than the fan driving degree "6" for more than the 2 nd predetermined time, the correction is performed to lower the start driving correspondence value, and by performing the correction, the fan driving degree of the outdoor fan 25 at the time of starting the driving of the booster fan 32 becomes a driving degree smaller than the fan driving degree before the correction, and as a result, , once the outdoor fan 25 is driven at the fan driving degree before the correction of the start driving correspondence value, the booster fan 32 starts to be driven, and therefore, when the desired air volume is too small, the booster fan 32 starts to be driven, and a situation where the booster fan 32 is not used is hard to occur.
According to this configuration, it is possible to suppress an increase in power consumption due to the absence of the booster fan 32 when a desired air volume is obtained.
（4-6）
Here, there is fixed relationship between the air conditioning load and the temperature of the outdoor air, therefore, by determining the air volume to be supplied to the outdoor heat exchanger in accordance with the temperature of the outdoor air, the air volume adapted to the air conditioning load, that is, the desired air volume, is easily adjusted.
In the present embodiment, when the outdoor fan 25 starts to be driven, that is, when the air-conditioning apparatus starts to operate, the fan driving degree of the outdoor fan 25 is specified based on the temperature value of the outdoor air. Then, the driving or stopping of the booster fan 32 is controlled based on the drive start correspondence value stored in advance in the storage unit 63b and the fan drive degree of the designated outdoor fan 25. Therefore, the driving or stopping of the booster fan 32 is indirectly determined according to the temperature value of the outdoor air.
With this configuration, the air volume suitable for the air conditioning load can be easily adjusted when the air conditioning apparatus is started to operate.
（4-7）
In the present embodiment, among the plurality of fan drive degrees of the outdoor fan 25, a value other than the fan drive degree, the drive start correspondence value of which is determined in advance, is designated as the fan drive degree, the drive stop correspondence value of which is determined in advance. As described above, since the fan driving degree predetermined as the start driving correspondence value is different from the fan driving degree predetermined as the stop driving correspondence value, it is possible to prevent the booster fan 32 from wobbling between driving and stopping.
(5) General examples of the invention
(5-1) alternative example A
In the above-described embodiment, the fan driving degree at the time of starting driving the outdoor fan 25 is specified according to the temperature of the outdoor air and the operating condition, and the outdoor fan motor 25m is controlled so that the outdoor fan 25 is driven at the specified fan driving degree.
In addition, if the high pressure of the refrigeration cycle is high in the cooling operation or the low pressure of the refrigeration cycle is low in the heating operation, it may be designed to start driving the outdoor fan 25 at a designated fan driving degree.
In the above embodiment, the driving or stopping of the booster fan 32 is controlled based on the drive start designation value stored in the memory 63b and the fan drive degree of the designated outdoor fan 25. Further, it may be designed to start driving the booster fan 32 when the difference between the discharge pressure and the suction pressure exceeds a prescribed pressure value.
(5-2) alternative example B
In addition to the above-described embodiment, it is also conceivable that the stop driving correspondence value is corrected.
Industrial applicability
The present invention relates to a control device capable of suppressing an increase in power consumption when a desired air volume is obtained, and is effectively applicable to a refrigeration device having a main fan and an auxiliary fan.
Claims (7)
1, control device (60) for a refrigeration device, the refrigeration device comprising a heat source unit (20) and an auxiliary fan (32), the heat source unit (20) having a heat source side heat exchanger and a main fan (25) capable of changing the number of revolutions, the main fan feeding outdoor air to the heat source side heat exchanger, the auxiliary fan (32) being attached to the heat source unit to assist the main fan and having a constant number of revolutions,
the method is characterized in that:
the control device comprises a memory unit (63b) and a correction unit (63c), wherein rotation speed indication values are stored in the memory unit (63b) in advance, and the rotation speed indication values are determined in advance as corresponding values for starting the auxiliary fan;
the correction unit corrects the determined drive start correspondence value according to a driving or stopping state of the sub fan.
2. The control device according to claim 1, characterized in that:
the start drive correspondence value has an upper limit.
3. The control device according to claim 1 or 2, characterized in that:
the start driving correspondence value has a lower limit.
4. The control device according to claim 1, characterized in that:
when the driving or stopping of the sub fan is repeated a predetermined number of times within a 1 st predetermined time, correction is performed to increase the start driving correspondence value.
5. The control device according to claim 1, characterized in that:
when the main fan is driven for more than 2 nd predetermined time within a revolution value lower than a predetermined revolution instruction value, correction is performed to lower the drive start correspondence value.
6. The control device according to claim 1, characterized in that:
when the main fan starts to be driven, the auxiliary fan is controlled to be driven or stopped according to a rotation number instruction value for the main fan, which is determined based on an outdoor air temperature value.
7. The control device according to claim 1, characterized in that:
the plurality of rotation number instruction values include a stop driving correspondence value for stopping driving of the sub fan, which is determined in advance and is different from the start driving correspondence value.
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| CN201410158206.7A CN105091254B (en) | 2014-04-18 | 2014-04-18 | Control device |
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| CN201410158206.7A CN105091254B (en) | 2014-04-18 | 2014-04-18 | Control device |
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| CN105091254B true CN105091254B (en) | 2020-01-31 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423089A (en) * | 2001-12-03 | 2003-06-11 | 林内株式会社 | Combustion apparatus |
| CN103124884A (en) * | 2010-09-30 | 2013-05-29 | 大金工业株式会社 | Outdoor unit for refrigeration device |
| CN103225620A (en) * | 2012-01-30 | 2013-07-31 | 华硕电脑股份有限公司 | Fan controlling method and electronic device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013138041A (en) * | 2011-12-27 | 2013-07-11 | Toshiba Corp | Electronic apparatus and fan control method of the same |
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2014
- 2014-04-18 CN CN201410158206.7A patent/CN105091254B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423089A (en) * | 2001-12-03 | 2003-06-11 | 林内株式会社 | Combustion apparatus |
| CN103124884A (en) * | 2010-09-30 | 2013-05-29 | 大金工业株式会社 | Outdoor unit for refrigeration device |
| CN103225620A (en) * | 2012-01-30 | 2013-07-31 | 华硕电脑股份有限公司 | Fan controlling method and electronic device |
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