JP2000292012A - Refrigeration cycle control device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To eliminate fluctuations in the discharge temperature of a compressor and to speed up the stabilization of the discharge temperature. A refrigeration cycle controller measures a discharge temperature of a compressor at predetermined reference times, and corrects a valve opening degree of an electronic expansion valve according to a deviation between a current value and a target value of the discharge temperature. When the valve opening of the electronic expansion valve 4 is corrected and controlled using the valve opening correction amount, the current predetermined value is determined in accordance with a change value between a previous value, which is a previously measured discharge temperature, and the current value. By extending the reference time and delaying the valve opening correction timing, the valve opening correction is performed when the discharge temperature is stabilized to some extent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures a temperature characteristic value relating to a refrigeration cycle, such as a compressor discharge temperature, at predetermined reference times, and performs electronic expansion according to a deviation between a current value and a target value of the temperature characteristic value. A refrigeration cycle control device for an air conditioner, a refrigerator, or the like that performs a refrigeration cycle temperature control by calculating a valve opening correction amount of a valve and correcting and controlling the valve opening of the electronic expansion valve using the valve opening correction amount. It is about.

[0002]

2. Description of the Related Art Conventionally, a refrigerating cycle control device for an air conditioner, a refrigerator or the like controls a valve opening degree of an electronic expansion valve to appropriately control a temperature of a refrigerant so that the refrigerant can be operated at a desired refrigerating capacity. I have to. FIG. 15 is a diagram showing a configuration of a refrigerant circuit to which a conventional refrigeration cycle control device is applied. FIG.
5, in this refrigerant circuit, the refrigerant compressed by the compressor 1 is sent from the discharge side of the compressor 1 to the indoor heat exchanger 3A via the four-way valve 2 during heating and outdoor heat exchange during cooling. Sent to the vessel 3B.

[0003] The refrigerant sent to the indoor heat exchanger 3A during heating is heat-exchanged by the indoor heat exchanger 3A, then expanded by the electronic expansion valve 4, and then expanded by the outdoor heat exchanger 3B.
, The heat is exchanged again, and the circulation is repeated through the four-way valve 2 to the suction side of the compressor 1. On the other hand, at the time of cooling, the refrigerant sent to the outdoor heat exchanger 3B exchanges heat with the outdoor heat exchanger 3B.
, The heat is exchanged again by the indoor heat exchanger 3 </ b> A, and sent to the suction side of the compressor 1 through the four-way valve 2.

The refrigeration cycle controller 11 obtains a discharge temperature from a discharge temperature detector 21 in order to control the discharge temperature of the refrigerant discharged from the compressor 1, and based on the discharge temperature, a valve opening correction unit. 5, the valve opening of the electronic expansion valve 4 is corrected, and the valve opening is controlled. The electronic expansion valve 4 is driven by a step motor or the like, and the valve opening correction unit 5 performs drive correction of the step motor or the like. The refrigeration cycle control unit 11 has an electronic expansion valve database 12 and stores a valve opening correction value corresponding to a temperature difference between the detected current value Td of the discharge temperature of the compressor 1 and the target value Tdo of the discharge temperature. The output is output to the opening correction unit 5 to correct the valve opening of the electronic expansion valve 4, thereby controlling the discharge temperature.

FIG. 16 is a diagram showing the contents of the electronic expansion valve database 12. In FIG. 16, the electronic expansion valve database 12 stores a current value Td and a target value Td of the discharge temperature.
The correction opening for cooling and the correction opening for heating are associated with each discharge temperature correction band classified according to the value of the temperature difference (Td-Tdo) from o. For example, the discharge temperature correction band “1” has a temperature difference (Td−Tdo) of −7.
(Deg) or less, and the correction opening at the time of cooling and heating at this time is both set to “−3”, and the valve opening of the electronic expansion valve 4 is corrected. In addition, the refrigeration cycle control unit 11 is provided for every predetermined reference time that is a predetermined time, for example, 2 ref.
The discharge temperature is acquired every minute, and the valve opening is corrected every predetermined reference time.

Such a conventional refrigeration cycle control device is described in, for example, Japanese Patent Application Laid-Open No. 8-166169. In this refrigeration cycle control device, a discharge temperature of a compressor is detected and a discharge for valve opening is detected. Using the temperature control table, the valve opening of the electronic expansion valve is controlled in the same manner as described above.

[0007]

However, in the conventional refrigeration cycle control device described above, when the current value Td of the discharge temperature of the compressor changes rapidly as shown in FIG. Since the valve opening correction of the expansion valve is performed, the discharge temperature may exceed the target value Tdo. In this case, the valve opening correction is further performed so that the current value of the discharge temperature returns to the target value Tdo again. The discharge temperature fluctuates due to a control time lag or the like, and it takes a long time to stabilize the discharge temperature.

[0008] The present invention has been made in view of the above,
An object of the present invention is to provide a refrigeration cycle control device that can eliminate fluctuations in the discharge temperature of a compressor and speed up stabilization.

[0009]

To achieve the above object, a refrigeration cycle control device according to the present invention measures a temperature characteristic value relating to a refrigeration cycle every predetermined reference time,
A valve opening correction amount of the electronic expansion valve is obtained in accordance with a deviation between the current value and the target value of the temperature characteristic value, and the valve opening of the electronic expansion valve is corrected and controlled using the valve opening correction amount. The refrigeration cycle control device that performs refrigeration cycle temperature control, further comprising a control unit that extends the current predetermined reference time according to a change value between a previous value that is a previously measured temperature characteristic value and the current value. And

According to this invention, the current predetermined reference time is extended in accordance with a change between the previous value, which is the previously measured temperature characteristic value, and the current value, and the correction timing of the valve opening of the electronic expansion valve is increased. At a time when the temperature characteristic value is stabilized, the valve opening is corrected in accordance with the deviation.

A refrigeration cycle control device according to the next invention measures a temperature characteristic value relating to the refrigeration cycle at every predetermined reference time, and determines the value of the electronic expansion valve according to the deviation between the current value and the target value of the temperature characteristic value. In the refrigeration cycle control device that performs the refrigeration cycle temperature control by obtaining the opening correction amount and correcting and controlling the valve opening of the electronic expansion valve using the valve opening correction amount, the temperature characteristic value measured last time is used. A control means for performing correction control of the valve opening of the electronic expansion valve when a change value between the value and the current value is equal to or less than a predetermined value.

According to the present invention, when the change value between the previous value, which is the temperature characteristic value measured last time, and the current value is equal to or less than a predetermined value, the control for correcting the valve opening of the electronic expansion valve is performed. When the temperature characteristic value is stabilized by substantially delaying the valve opening timing of the valve, the valve opening correction according to the deviation is performed.

[0013] In a refrigeration cycle control device according to the next invention, in the above invention, the control means changes the predetermined value in accordance with a deviation between a current value and a target value of the temperature characteristic value. And

According to the present invention, the control means changes the predetermined value in accordance with the deviation between the current value and the target value of the temperature characteristic value, thereby performing a fine-grained and efficient valve opening correction. I'm trying to do it.

In the refrigeration cycle control apparatus according to the next invention, in the above invention, the control means further includes a determination means for determining whether the positive and negative signs of the change value and the deviation are the same. When the determination means determines that the electronic components have the same sign, the electronic control unit controls the valve opening of the electronic expansion valve based on the valve opening correction amount corresponding to the deviation at each predetermined reference time.

According to the present invention, when the direction of the temperature change corresponds to the departure from the target value, when the determination means determines that the direction is the same, the deviation corresponding to the predetermined reference time is determined. Correction control of the valve opening of the electronic expansion valve is performed based on the valve opening correction amount, and when it is determined that the direction of the temperature change is close to the target value, that is, the reference sign is substantially equal to the predetermined reference. The valve opening is corrected so that the time can be extended.

In the refrigeration cycle control apparatus according to the next invention, in the above invention, the control means further comprises a determination means for determining whether the positive and negative signs of the change value and the deviation are the same. If the determination unit determines that the same sign is used, the predetermined reference time is shortened, and a correction control of the valve opening of the electronic expansion valve is forcibly performed by a fixed valve opening correction amount. I do.

According to the present invention, when the determination means determines that the direction of the temperature change is away from the target value, and when the determination means determines that the direction is the same, the predetermined reference time is shortened, and Correction control of the valve opening of the electronic expansion valve is forcibly performed by the opening correction amount, and when the direction of the temperature change approaches the target value, when it is determined that the sign is different, substantially, The valve opening is corrected so that the predetermined reference time can be extended.

In the refrigeration cycle control device according to the next invention, in the above invention, the control means further includes a determination means for determining whether the positive and negative signs of the change value and the deviation are the same. When the determination means determines that the symbols have the same sign, correction control of the valve opening of the electronic expansion valve is performed by a valve opening correction amount corresponding to the change value.

According to the present invention, when the direction of the temperature change is away from the target value, the valve opening correction amount corresponding to the change value is determined when the determination means determines that the direction is the same. The electronic control unit performs the correction control of the valve opening degree of the electronic expansion valve, and when it is determined that the direction of the temperature change is the opposite sign corresponding to approaching the target value, the extension of the predetermined reference time is substantially permitted. The corrected valve opening is corrected.

A refrigeration cycle control device according to the next invention is characterized in that, in the above invention, the temperature characteristic value is a compressor discharge temperature.

According to the present invention, the temperature characteristic value is a compressor discharge temperature.

In the refrigeration cycle control device according to the next invention, in the above invention, the temperature characteristic value is a temperature difference between a condensing temperature and a temperature before expansion and a temperature difference between a compressor suction temperature and an evaporation temperature. The present invention is characterized in that supercooling control and superheat control of the refrigerant are performed by controlling the valve opening of the electronic expansion valve.

According to the present invention, the temperature characteristic value is defined as a temperature difference between the condensing temperature and the pre-expansion temperature, and a temperature difference between the compressor suction temperature and the evaporation temperature. By performing the control, the supercooling degree control and the superheating degree control of the refrigerant are performed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a refrigeration cycle control device according to the present invention will be described below in detail with reference to the accompanying drawings.

Embodiment 1 First, a first embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating a configuration of a refrigerant circuit including a refrigeration cycle device according to Embodiment 1 of the present invention. The same components as those of the refrigerant circuit shown in FIG. 15 are denoted by the same reference numerals. In FIG. 1, in this refrigerant circuit, the refrigerant compressed by the compressor 1 is sent from the discharge side of the compressor 1 to the indoor heat exchanger 3A via the four-way valve 2 during heating, and the outdoor heat exchanger during cooling. Exchanger 3
Sent to B.

At the time of heating, the refrigerant sent to the indoor heat exchanger 3A is subjected to heat exchange by the indoor heat exchanger 3A, and then expanded by the electronic expansion valve 4, and then to the outdoor heat exchanger 3B.
, The heat is exchanged again, and the circulation is repeated through the four-way valve 2 to the suction side of the compressor 1. On the other hand, at the time of cooling, the refrigerant sent to the outdoor heat exchanger 3B exchanges heat with the outdoor heat exchanger 3B.
, The heat is exchanged again by the indoor heat exchanger 3 </ b> A, and sent to the suction side of the compressor 1 through the four-way valve 2. The solid arrows indicate the flow of the refrigerant during heating, and the dashed arrows indicate the flow of the refrigerant during cooling.

The refrigeration cycle control section 11 has an electronic expansion valve database 12, a correction time change database 13, and a temperature difference / change calculation section 14. The temperature difference / change calculation unit 14 basically acquires the current value Td of the discharge temperature of the compressor 1 from the discharge temperature detection unit 21 at every predetermined reference time, for example, every two minutes. Target value Tdo
And a temperature change value between the previous value Tdi obtained from the discharge temperature detection unit 21 and the current value Tdi + 1 (Td).

The refrigeration cycle control section 11 sends the temperature change value calculated by the temperature difference / change calculation section 14 to the correction time change database 13 and extends the current predetermined reference time in accordance with the calculated temperature change value. And cancels the valve opening correction. FIG. 2 is a diagram showing the specific contents of the correction time change database 13. In the correction timing change database 13 shown in FIG. 2, the temperature change value ΔTdi is divided into seven for each predetermined range, and the correction timing extension time is set for each of the divided ranges.

That is, in the correction time change database 13 shown in FIG. 7, when +5 <ΔTdi, 3 minutes and +3 <Δ
2 minutes when Tdi ≦ + 5, 1 minute when +1 <ΔTdi ≦ + 3, 0 minutes when −1 <ΔTdi ≦ + 1, -3 <ΔTd
1 minute when i ≦ −1, 2 when −5 <ΔTdi ≦ −3
When ΔTdi ≦ −5, the correction timing extension time of 4 minutes is added to the predetermined reference time.
In this case, the larger the temperature change value of the discharge temperature is, the longer the timing of the next valve opening correction is set. In addition, since the correction timing extension time when -1 <ΔTdi ≦ + 1 is 0 minute, the predetermined reference time is not extended.

The refrigerating cycle controller 11 obtains the discharge temperature Td again after the time extended by the correction time change database 13, calculates the temperature difference (Td−Tdo) by the temperature difference / change calculator 14, and Value Δ
Tdi is calculated, the temperature difference (Td−Tdo) is sent to the electronic expansion valve database 12 as shown in FIG. 16, and the valve opening correction value corresponding to each discharge correction band of the temperature difference (Td−Tdo) is calculated. The valve opening correction value is obtained and the valve opening correction value is
Output to

When the correction timing extension time is 0 minutes according to the correction time change database 13, the temperature change value ΔTdi at this time is sent to the electronic expansion valve database 11, and the temperature difference (Td−Tdo) Is corrected in accordance with. Further, the once extended predetermined reference time is not further extended, and after the extension, the valve opening correction is always performed by the valve opening correction value obtained from the electronic expansion valve database 11.

Here, the valve opening correction control by the refrigeration cycle controller 11 will be described in detail with reference to the timing chart of FIG. In FIG. 3, the predetermined reference time is set to 2 minutes. First, at time ti + 1, the valve opening is corrected. The current value of the discharge temperature at this time is Tdi + 1. At time ti + 2 two minutes after that, the current value Tdi + 2 of the discharge temperature is detected, and the temperature difference / change calculation unit 14 is used.
Calculates the temperature change value ((Tdi + 2)-(Tdi + 1)) and obtains the correction timing extension time X corresponding to this temperature change value from the correction time change database 13, and at time ti + 2, the valve opening correction is performed. , The predetermined reference time is extended by X minutes.

At a time point tj + 1 (2 + X) minutes after the time point ti + 1, the current value of the discharge temperature Tdj + 1
Is detected, the temperature difference / change calculation unit 14 calculates a temperature change value ((Tdj + 1)-(Tdi + 1)), and the time t
A valve opening correction value corresponding to the deviation between the current value Tdj + 1 at j + 1 and the target value Tdo is stored in the electronic expansion valve database 12.
And outputs it to the valve opening correction unit 5.

According to the first embodiment, the predetermined reference time is extended in accordance with the temperature change between the current value and the previous value of the discharge temperature, and particularly when the temperature change is large, the predetermined reference time is extended. Is set to be long, and the valve opening is corrected when the discharge temperature has stabilized to some extent, so that fluctuations in the discharge temperature when the temperature change is large are eliminated,
The discharge temperature can be stabilized more quickly.

Embodiment 2 Next, a second embodiment of the present invention will be described. In the first embodiment, the predetermined reference time is extended based on the temperature change value between the current value and the previous value of the discharge temperature to shift the valve opening correction time.
In the second embodiment, it is determined whether or not to perform the valve opening correction based on the temperature change value at the elapse of each predetermined reference time, and the valve opening correction is not performed when the temperature change value is large. The discharge temperature is stabilized.

FIG. 4 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 2 of the present invention. In FIG. 4, the refrigeration cycle control unit 11
Is a temperature difference / change calculator 14 having the same configuration as that of the first embodiment.
And an electronic expansion valve database 12, and an execution determination unit 15 that determines whether to perform the valve opening correction based on the temperature change value. Other configurations are the same as those of the refrigerant circuit shown in FIG. 1, and the same components are denoted by the same reference numerals.

The temperature difference / change calculator 14 of the refrigeration cycle controller 11 obtains the current value Td of the discharge temperature of the compressor 1 from the discharge temperature detector 21 every predetermined reference time, for example, every two minutes. The temperature difference (Td−Tdo) between the value Td and the target value Tdo of the discharge temperature is calculated, and the previous value Tdi and the current value Td obtained from the discharge temperature detection unit 21 last time are used.
A temperature change value ΔTdi with i + 1 (Td) is calculated.

The execution determination unit 15 of the refrigeration cycle control unit 11
Is the temperature change value calculated by the temperature difference / change calculation unit 14,
It is determined whether or not the value is equal to or less than a preset reference value. The refrigeration cycle control unit 11 does not perform the valve opening correction when the determination result of the execution determination unit 15 is not less than the reference value, and when the determination result is less than the reference value, the temperature difference / change calculation unit 14 Sends the calculated temperature difference (Td-Tdo) to the electronic expansion valve database 12 to obtain a valve opening correction value corresponding to each discharge correction band of the temperature difference (Td-Tdo). By outputting the value to the valve opening correction section 5, the valve opening correction is performed.

Here, the valve opening correction control by the refrigeration cycle controller 11 will be described in detail with reference to the timing chart of FIG. In FIG. 5, the predetermined reference time is set to 2 minutes, and the reference value ΔTdi in the execution determination unit 15 is set to “4”. First, at time ti + 1, the valve opening is corrected. The current value of the discharge temperature at this time is Tdi + 1. Time ti two minutes later
+2, the current value of the discharge temperature Tdi + 2 is detected,
The temperature difference / change calculator 14 calculates the temperature change value ΔTdi =
((Tdi + 2)-(Tdi + 1)) = 8 is calculated, and the temperature change value ΔTdi = 8 is sent to the execution determination unit 15. However, the execution determination unit 15 determines that the valve opening degree is not less than “4”. No correction is performed.

At the next time point ti + 3 two minutes later, the current value Tdi + 3 of the discharge temperature is detected, and the temperature difference / change calculation section 14 calculates the temperature change value ΔTdi = ((Tdi + 3) −
(Tdi + 2)) = 5, and this temperature change value ΔTd
i = 5 is sent to the execution determination unit 15,
Does not perform the valve opening correction because ΔTdi is not “4” or less.

At the next time point ti + 4 two minutes later, the current value Tdi + 4 of the discharge temperature is detected, and the temperature difference / change calculator 14 calculates the temperature change value ΔTdi = ((Tdi + 4) −
(Tdi + 3)) = 3, and this temperature change value ΔTd
i = 3 is sent to the execution determination unit 15. Execution determination unit 15
Since ΔTdi is equal to or less than “4”, the temperature difference ((Tdi + 4) −Tdo) at this time is sent to the electronic expansion valve database 12, and the valve opening correction value corresponding to this temperature difference is used as the valve opening correction. The signal is sent to the section 5 and the valve opening of the electronic expansion valve 4 is corrected. Accordingly, when the temperature change value ΔTdi is a large value exceeding the reference value “4”, the valve opening correction is not performed, and the predetermined reference time is substantially extended in units of two minutes.

According to the second embodiment, when the temperature change value is large according to the temperature change value between the current value and the previous value of the discharge temperature, the predetermined reference time is substantially in units of the predetermined reference time. Since the valve opening is corrected when the discharge temperature is extended to some extent and the discharge temperature is stabilized to some extent, the fluctuation of the discharge temperature when the temperature change is large can be eliminated as in the first embodiment, and the discharge temperature can be stabilized more quickly.

Embodiment 3 FIG. Next, a third embodiment of the present invention will be described. In the second embodiment, the execution determination unit 15 uniformly determines whether the temperature change value is equal to or less than the reference value, and when the temperature change value exceeds the reference value, does not perform the valve opening correction so as to perform a predetermined reference time unit. Although the predetermined reference time is extended, in the third embodiment, a plurality of reference conditions are provided in which the value of the reference value is made to correspond to the temperature difference between the current value and the previous value of the discharge temperature. Detailed valve opening correction is performed.

FIG. 6 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 3 of the present invention. In FIG. 6, the refrigeration cycle control unit 11
Is a temperature difference / change calculator 14 having the same configuration as that of the first embodiment.
A correction start condition database 16 having a plurality of reference conditions corresponding to a discharge temperature correction band, which is a division of the temperature difference used in the electronic expansion valve database 12; It has a condition determination unit 17 that determines whether the value satisfies the corresponding reference condition in the correction start condition database 16. Other configurations are the same as those of the refrigerant circuit shown in FIG. 1, and the same components are denoted by the same reference numerals.

The temperature difference / change calculator 14 of the refrigeration cycle controller 11 obtains the current value Td of the discharge temperature of the compressor 1 from the discharge temperature detector 21 every predetermined reference time, for example, every two minutes. The temperature difference (Td−Tdo) between the value Td and the target value Tdo of the discharge temperature is calculated, and the previous value Tdi and the current value Td obtained from the discharge temperature detection unit 21 last time are used.
A temperature change value ΔTdi with i + 1 (Td) is calculated.

Condition determination unit 17 of refrigeration cycle control unit 11
Is the temperature change value ΔT calculated by the temperature difference / change calculation unit 14.
It is determined whether or not di satisfies a preset reference condition. At this time, since the reference condition for each discharge temperature correction band stored in the correction start condition database 16 is used, the temperature difference / change calculation unit is used. The temperature difference (Td−
Tdo), a reference condition corresponding to the discharge temperature correction band having the temperature difference (Td-Tdo) is taken out, and it is determined whether or not the temperature change value ΔTdi satisfies the reference condition.

FIG. 7 shows the specific contents of the correction start condition database 16. 7, the correction start condition database 16 uses the same division as the discharge temperature correction band in the electronic expansion valve database shown in FIG. 16, and sets a different correction start condition for each discharge temperature correction band. ing. That is, ΔTdi <8 and ΔTdi for the discharge temperature correction bands “1” to “7”, respectively.
di <4, ΔTdi <2, ΔTdi <1, ΔTdi> −
2, ΔTdi> −4 and ΔTdi> −8.

For example, if the temperature difference (Td-Tdo) is -4
If the temperature change value ΔTdi is 3 in (discharge temperature correction band = 2) and the reference condition ΔTdi <4 is satisfied, the valve opening is corrected, and the temperature difference (Td−Tdo) becomes −4 (discharge). If the temperature change value ΔTdi is 5 in the temperature correction band = 2), the reference condition ΔTdi <4 is not satisfied, so the valve opening correction is not performed.

That is, the refrigeration cycle control unit 11 does not perform the valve opening correction when the result of the determination by the condition determination unit 17 does not satisfy the reference condition. The temperature difference (Td-Tdo) calculated by the difference / change calculating unit 14 is sent to the electronic expansion valve database 12, and a valve opening correction value corresponding to each discharge correction band of the temperature difference (Td-Tdo) is obtained. By outputting the valve opening correction value to the valve opening correction section 5, the valve opening correction is performed.

Here, the valve opening correction control by the refrigeration cycle controller 11 will be described with reference to the timing chart of FIG. In FIG. 8, the predetermined reference time is set to 2 minutes. First, the valve opening is corrected at time ti. The current value of the discharge temperature at this time is Tdi.
Two minutes later at time ti + 1, the current value T of the discharge temperature
When di + 1 is detected, the temperature difference / change calculation unit 14 calculates the temperature change value ΔTdi = ((Tdi + 1) −Tdi), calculates the temperature difference (Tdi−Tdo), and sends it to the condition determination unit 17. The condition determination unit 17 acquires a reference condition corresponding to the temperature difference (Tdi-Tdo) from the correction start condition database 16, and obtains the temperature change value Δ
It is determined whether or not Tdi satisfies the reference condition.

In FIG. 8, it is determined that the reference condition is not satisfied, and the valve opening is not corrected. Also, at time ti
Even at +2, it is determined that the reference condition is not satisfied, and the valve opening correction is not performed. At the next time point ti + 3,
It is determined that the reference condition is satisfied, and the valve opening is corrected. Accordingly, when the temperature change value is a large value that does not satisfy the reference condition, the valve opening correction is not performed, and the predetermined reference time is substantially extended in units of two minutes.

According to the third embodiment, when the temperature change value is large enough not to satisfy the reference condition corresponding to the temperature difference of the discharge temperature, the predetermined reference time is substantially equal to the predetermined reference time. Since the valve opening is corrected when the discharge temperature is stabilized to some extent, it is possible to eliminate the fluctuation of the discharge temperature when the temperature change is large and to accelerate the stabilization of the discharge temperature as in the second embodiment. In addition, since the reference condition is set in accordance with the temperature difference, fine-grained valve opening control can be performed.

Embodiment 4 Next, a fourth embodiment of the present invention will be described. In all of the first to third embodiments, even when the discharge temperature of the compressor 1 exceeds the target value due to sudden disturbance or the like, that is, the temperature change value ΔTdi and the temperature difference (Td−Tdo) Even if the positive and negative signs in ()) are the same, the predetermined reference time is extended to perform stable temperature control.
In the fourth embodiment, the temperature change value ΔTdi and the temperature difference (Td
When the positive and negative signs of −Tdo) are different signs, the discharge temperature is smoothly approaching the target value. Therefore, the first to third embodiments are applied. At each predetermined reference time, the valve opening is corrected in accordance with only the temperature difference (Td-Tdo) so as to quickly approach the target value.

FIG. 9 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 4 of the present invention. In FIG. 9, the refrigeration cycle control unit 11
Is a temperature difference / change calculator 14 having the same configuration as that of the first embodiment.
And the correction time change database 13 and the electronic expansion valve database 12, and the temperature change value ΔT
It has a temperature direction determination unit 18 that determines whether the positive and negative signs of di and the temperature difference (Td-Tdo) are different signs or the same sign.
Other configurations are the same as those of the refrigerant circuit shown in FIG. 1, and the same components are denoted by the same reference numerals.

The temperature difference / change calculator 14 of the refrigeration cycle controller 11 obtains the current value Td of the discharge temperature of the compressor 1 from the discharge temperature detector 21 every predetermined reference time, for example, every two minutes. The temperature difference (Td−Tdo) between the value Td and the target value Tdo of the discharge temperature is calculated, and the previous value Tdi and the current value Td obtained from the discharge temperature detection unit 21 last time are used.
A temperature change value ΔTdi with i + 1 (Td) is calculated.

The temperature direction determination unit 17 of the refrigeration cycle control unit 11 determines whether the sign of the temperature change value ΔTdi calculated by the temperature difference / change calculation unit 14 is the same as the sign of the temperature difference (Td−Tdo). It is determined whether it is a sign. In the case of the same sign, as shown in FIG. 10C, the discharge temperature goes in the direction away from the target value, so that the refrigeration cycle control unit 11 extends the predetermined reference time using the correction time change database 13. The valve opening control value corresponding to the temperature difference (Td-Tdo) is obtained at every predetermined predetermined reference time only by the electronic expansion valve database 12 without performing the operation, and the valve opening control value is obtained based on the valve opening control value. Correction is performed, and the discharge temperature is quickly moved to the target value Tdo.

On the other hand, if the temperature direction determination unit 17 determines that the same sign is not used, the discharge temperature approaches the target value as shown in FIG. After the predetermined reference time has been extended and the predetermined reference time has been extended, a valve opening correction value corresponding to the temperature difference (Td-Tdo) is acquired using the electronic expansion valve database 12, and the valve opening correction value is obtained. The valve opening correction is performed based on the opening correction value to stabilize the discharge temperature. Note that the temperature change value ΔTdi or the temperature difference (Td−Td
If the sign of o) is 0, it belongs to either sign.

Thus, in the fourth embodiment, when the temperature change value ΔTdi and the temperature difference (Td−Tdo) have the same sign, it is possible to quickly approach the target value of the discharge temperature, In this case, the predetermined reference time can be extended as in the first embodiment, and the stabilization of the discharge temperature can be expedited.

Although the fourth embodiment has been described as an embodiment corresponding to the first embodiment, the present invention is not limited to this, and may be an embodiment corresponding to the second or third embodiment. In any of Embodiments 2 and 3,
Only when the sign of the temperature change value ΔTdi and the sign of the temperature difference (Td−Tdo) are different signs, the predetermined reference time can be substantially extended according to the second and third embodiments.

Embodiment 5 Next, a fifth embodiment of the present invention will be described. In the fourth embodiment, when the positive and negative signs of the temperature change value ΔTdi and the temperature difference (Td−Tdo) are the same, the discharge temperature quickly approaches the target value without permitting the extension of the predetermined reference time. However, in the fifth embodiment, the temperature change value ΔTdi and the temperature difference (Td−Td
When the positive and negative signs of o) are the same, the valve opening correction amount is forcibly set to a constant value, and the valve opening correction is performed by setting to shorten the predetermined reference time.

FIG. 11 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 5 of the present invention. In FIG. 11, the refrigeration cycle control unit 1
Reference numeral 1 denotes a temperature difference / change calculation unit 1 having the same configuration as that of the first embodiment.
4, the correction time change database 13 and the electronic expansion valve database 12, and the temperature change value Δ
A temperature direction determining unit 18 that determines whether the positive and negative signs of Tdi and the temperature difference (Td−Tdo) are different signs or the same sign, and when the positive and negative signs are the same sign, forcibly corrects the valve opening degree Set to the amount and set to reduce the predetermined reference time,
There is a forced correction unit 19 that performs the valve opening correction based on the set fixed valve opening correction amount at a reduced predetermined reference time. Other configurations are the same as those of the refrigerant circuit shown in FIG. 1, and the same components are denoted by the same reference numerals.

The temperature difference / change calculation unit 14 of the refrigeration cycle control unit 11 sets the temperature of the compressor 1 at a predetermined reference time or after the shortened predetermined reference time if the forcible correction unit 19 shortens the setting. The current value Td of the discharge temperature is obtained from the discharge temperature detection unit 21, and the temperature difference (Td−Tdo) between the current value Td and the target value Tdo of the discharge temperature is calculated, and the previous time is obtained from the discharge temperature detection unit 21 Temperature change value ΔT between the previous value Tdi and the current value Tdi + 1 (Td)
Calculate di.

The temperature direction determination unit 17 of the refrigeration cycle control unit 11 determines whether the sign of the temperature change value ΔTdi calculated by the temperature difference / change calculation unit 14 is the same as the sign of the temperature difference (Td−Tdo). It is determined whether it is a sign. In the case of the same sign, as shown in FIG. 10C, the discharge temperature goes in the direction away from the target value, so that the refrigeration cycle control unit 11 The valve opening is corrected based on the opening correction amount, and the next predetermined reference time is set to be shortened so that the discharge temperature quickly approaches the target value.

On the other hand, when the temperature direction judging section 17 judges that they do not have the same sign, as shown in FIG. 10 (d), since the discharge temperature approaches the target value, the correction timing change database 13 is used. The predetermined reference time can be extended, and the temperature difference (T
(d-Tdo), the valve opening is corrected based on the valve opening correction amount, and the discharge temperature is stabilized. When the sign of the temperature change value ΔTdi or the temperature difference (Td−Tdo) is 0, the temperature change value ΔTdi or Td-Tdo belongs to one of the signs.

In the fifth embodiment, the temperature change value ΔTd
When i and the temperature difference (Td−Tdo) have the same sign, it is possible to quickly approach the target value of the discharge temperature. By extending the discharge temperature, the discharge temperature can be stabilized more quickly.

Although the fifth embodiment has been described as an embodiment corresponding to the first embodiment, the present invention is not limited to this, and may be an embodiment corresponding to the second or third embodiment. In any of Embodiments 2 and 3,
Only when the sign of the temperature change value ΔTdi and the sign of the temperature difference (Td−Tdo) are different signs, the predetermined reference time can be substantially extended according to the second and third embodiments.

Embodiment 6 FIG. Next, a sixth embodiment of the present invention will be described. In the fourth embodiment, when the positive and negative signs of the temperature change value ΔTdi and the temperature difference (Td−Tdo) are the same, the discharge temperature quickly approaches the target value without permitting the extension of the predetermined reference time. However, in the sixth embodiment, the temperature change value ΔTdi and the temperature difference (Td−Td
When the positive and negative signs of o) are the same, the temperature change value ΔTd
The valve opening correction is made directly by the valve opening correction amount corresponding to i.

FIG. 12 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 6 of the present invention. In FIG. 12, the refrigeration cycle control unit 1
Reference numeral 1 denotes a temperature difference / change calculation unit 1 having the same configuration as that of the first embodiment.
4, the correction time change database 13 and the electronic expansion valve database 12, and the temperature change value Δ
A temperature direction determining unit 18 that determines whether the positive and negative signs of Tdi and the temperature difference (Td−Tdo) are different signs or the same sign, and is used when the positive and negative signs have the same sign, and the temperature change value ΔTdi
And an electronic expansion valve database 20 that holds a valve opening correction amount corresponding to. Other configurations are the same as those of the refrigerant circuit shown in FIG. 1, and the same components are denoted by the same reference numerals.

The temperature difference / change calculator 14 of the refrigeration cycle controller 11 obtains the present value Td of the discharge temperature of the compressor 1 from the discharge temperature detector 21 at every predetermined reference time, and obtains the current value Td and the discharge temperature. Temperature difference from the target value Tdo (Td−Td)
o) and the temperature change value ΔTdi between the previous value Tdi and the current value Tdi + 1 (Td) acquired from the discharge temperature detection unit 21 last time.

The temperature direction determination unit 17 of the refrigeration cycle control unit 11 determines whether the sign of the temperature change value ΔTdi calculated by the temperature difference / change calculation unit 14 is the same as the sign of the temperature difference (Td−Tdo). It is determined whether it is a sign. In the case of the same sign, as shown in FIG. 10C, the discharge temperature goes in the direction away from the target value, so that the refrigeration cycle control unit 11 is held in the electronic expansion valve database 20.
The valve opening correction is performed based on the correspondence relationship between the valve opening correction amounts that are divided by the absolute value of the temperature change value ΔTdi and are divided into the same positive sign and the same negative sign.

FIG. 13 is a diagram showing the specific contents of the electronic expansion valve database 20. In FIG. 13, the temperature change value ΔTdi is first divided into three according to its absolute value, and each division is further divided into a case of a positive same sign and a case of a negative same sign. That is, 4 <| ΔTdi |
When (Td−Tdo)> 0, a correction of +4 is performed,
When (Td−Tdo) <0, a correction of −3 is performed.

When 2 <| ΔTdi | ≦ 4, (Td−Td
o) When +0, a correction of +2 is performed, and (Td−Tdo) <
When it is 0, a correction of -2 is performed. 0 ≦ | ΔTdi | ≦ 2,
When (Td−Tdo)> 0, a correction of +1 is performed, and (Td−Tdo) is corrected.
When −Tdo) <0, −1 is corrected. This allows
The larger the absolute value of the temperature change value ΔTdi, that is, the further away from the temperature, the larger the valve opening correction amount, and the more quickly the target value of the discharge temperature is reached.

On the other hand, when the temperature direction judging section 17 judges that they do not have the same sign, as shown in FIG. 10 (d), the discharge temperature tends to approach the target value. The predetermined reference time can be extended, and the temperature difference (T
(d-Tdo), the valve opening is corrected based on the valve opening correction amount, and the discharge temperature is stabilized. When the sign of the temperature change value ΔTdi or the temperature difference (Td−Tdo) is 0, the temperature change value ΔTdi or Td-Tdo belongs to one of the signs.

In the sixth embodiment, the temperature change value ΔTd
When i and the temperature difference (Td-Tdo) have the same sign, the more the discharge temperature moves away from the target value, the more quickly the discharge temperature can approach the target value of the discharge temperature. As described in the first embodiment, the predetermined reference time can be extended, and the discharge temperature can be stabilized more quickly.

Although the sixth embodiment has been described as an embodiment corresponding to the first embodiment, the present invention is not limited to this, and may be an embodiment corresponding to the second and third embodiments. In any of Embodiments 2 and 3,
Only when the sign of the temperature change value ΔTdi and the sign of the temperature difference (Td−Tdo) are different signs, the predetermined reference time can be substantially extended according to the second and third embodiments.

Embodiment 7 Next, a seventh embodiment of the present invention will be described. In the first to sixth embodiments, the temperature change value ΔTdi and the temperature difference (Td−Tdo) are based on the discharge temperature detected by the discharge temperature detection unit 21.
, The valve opening is corrected.
In this embodiment, the valve opening is corrected based on a temperature characteristic value other than the discharge temperature detected by the discharge temperature detection unit 21, and as a result, supercooling control or superheating control of the refrigerant is performed.

FIG. 14 is a block diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 7 of the present invention. In FIG. 14, the suction temperature detecting unit 22
Detects the temperature of the refrigerant drawn into the compressor 1. The temperature detector 23A is provided in the indoor heat exchanger 3B, and detects a condensing temperature during cooling, and detects an evaporating temperature during heating. The temperature detection unit 24A is provided in the outdoor heat exchanger 3A, detects an evaporation temperature during cooling, and detects a temperature during heating.
Detect the condensation temperature. The temperature detection unit 23B is provided on the side of the outdoor heat exchanger 3B of the electronic expansion valve 4, and detects a temperature before expansion during cooling. The temperature detection unit 24B is provided on the indoor heat exchanger 3A side of the electronic expansion valve 4 and detects a temperature before expansion during heating.

The temperature difference / change calculating unit 14A corresponds to the temperature difference / change calculating unit 14. The temperature detecting unit 23A controls the degree of supercooling of the refrigerant at every predetermined reference time during cooling.
A temperature difference between the condensation temperature of A and the temperature before expansion of the temperature detection unit 23B and a change value of the temperature difference are obtained, and the suction temperature and the temperature of the suction temperature detection unit 22 are controlled in order to control the superheat degree of the refrigerant. A temperature difference from the evaporation temperature of the detection unit 24A and a change value from the temperature difference are obtained.

Further, the temperature difference / change calculating section 14A performs the control of the degree of supercooling of the refrigerant at every predetermined reference time during heating, so that the condensation temperature of the temperature detecting section 24A and the temperature detecting section 24A are controlled.
In order to obtain a temperature difference between the temperature before the expansion of B and a change value of the temperature difference, and to control the superheat degree of the refrigerant, the suction temperature of the suction temperature detection unit 22 and the evaporation temperature of the temperature detection unit 23A are The change value of the temperature difference is obtained.

The correction time change database 13A corresponds to the correction time change database 13, and stores the relationship between the change value calculated by the temperature difference / change calculation unit 14A and the correction time extension time corresponding to this change value. . The electronic expansion valve database 12A corresponds to the electronic expansion valve database 12, and stores a valve opening correction amount corresponding to the deviation between the current temperature difference and the target temperature difference. The refrigeration cycle control unit 11A extends the predetermined reference time according to the correction time change database 13A, and after the extended predetermined reference time, calculates the valve opening correction amount acquired from the electronic expansion valve database 12A as the valve opening correction unit. 5 to control the opening degree of the electronic expansion valve 4, and as a result, the supercooling control and the superheating control of the refrigerant are stably performed.

According to the seventh embodiment, the temperature difference between the condensing temperature and the temperature before expansion, and the change value of this temperature difference, the temperature difference between the compressor suction temperature and the evaporation temperature, and the change value of this temperature difference, Therefore, when the opening degree control of the electronic expansion valve 4 is performed by changing the predetermined reference time, the supercooling degree control and the superheating degree control of the refrigerant can be more quickly stabilized.

Although the seventh embodiment has been described as an embodiment corresponding to the first embodiment, the present invention is not limited to this, and may be an embodiment corresponding to the second to sixth embodiments. In any case of Embodiments 2 to 6,
The temperature difference may be the deviation between the detected temperature difference and the target temperature difference, and the temperature change value may be the change value of the detected temperature difference.

Further, in Embodiment 7 described above,
The temperature of the temperature characteristic value itself such as the condensing temperature, the evaporating temperature, the temperature of the wind immediately after passing through the indoor heat exchanger, the indoor temperature, etc., is detected, and the valve opening degree control is performed. Good. In this case, these temperatures may be detected, and the above-described temperature control may be performed based on the temperature difference and the temperature change value.

[0085]

As described above, according to the present invention, the current predetermined reference time is extended in accordance with a change between a previous value, which is a previously measured temperature characteristic value, and the current value, and electronic expansion is performed. Since the correction timing of the valve opening is delayed and the valve opening is corrected in accordance with the deviation at the time when the temperature characteristic value is stabilized, there is an effect that the discharge temperature can be stabilized more quickly.

According to the next invention, when the change between the previous value, which is the previously measured temperature characteristic value, and the current value is equal to or less than a predetermined value, the valve opening of the electronic expansion valve is controlled to be corrected. Since the valve opening timing of the expansion valve is substantially delayed to perform the valve opening correction in accordance with the deviation at the time when the temperature characteristic value is stabilized, the effect of stabilizing the discharge temperature can be achieved. Play.

According to the next invention, the control means changes the predetermined value in accordance with the deviation between the current value and the target value of the temperature characteristic value, thereby providing a fine-grained and efficient valve opening correction. Therefore, there is an effect that the stabilization of the discharge temperature can be efficiently accelerated.

According to the next invention, in the case where the direction of the temperature change corresponds to the departure from the target value. When the electronic control valve performs the correction control of the valve opening degree of the electronic expansion valve according to the valve opening correction amount, and determines that the direction of the temperature change is close to the target value, it is substantially the same as the opposite sign. The valve opening correction that allows the reference time to be extended is performed, so that the discharge temperature can be stabilized more quickly, and even when the discharge temperature moves away from the target value, the discharge temperature can be quickly set to the target value. This has the effect of being able to approach.

According to the next invention, in the case where the direction of the temperature change corresponds to the departure from the target value, when the determination means determines that they have the same sign, the predetermined reference time is shortened, and Correction control of the valve opening of the electronic expansion valve is forcibly performed by the valve opening correction amount, and when it is determined that the sign of the opposite sign corresponds to the direction of the temperature change approaching the target value, substantially Since the valve opening correction that allows the extension of the predetermined reference time is performed, the stabilization of the discharge temperature can be accelerated, and even when the discharge temperature moves away from the target value, the discharge temperature can be quickly increased. This has the effect of being able to approach the target value.

According to the next invention, in the case where the direction of the temperature change corresponds to the departure from the target value, when the determination means determines that the direction is the same, the valve opening correction according to the change value is performed. The correction control of the valve opening degree of the electronic expansion valve is performed based on the amount, and when it is determined that the direction of the temperature change approaches the target value, that is, when it is determined that the sign is different, the extension of the predetermined reference time is substantially extended. Since the permitted valve opening correction is performed, the discharge temperature can be stabilized more quickly, and even when the discharge temperature goes away from the target value, the discharge temperature can be quickly brought closer to the target value. This has the effect.

According to the next invention, the temperature characteristic value is a compressor discharge temperature. This has the effect of stabilizing the discharge temperature during specific compressor discharge temperature control.

According to the next invention, the temperature characteristic value is
By controlling the temperature difference between the condensing temperature and the pre-expansion temperature, and the temperature difference between the compressor suction temperature and the evaporation temperature, and controlling the valve opening of the electronic expansion valve, the supercooling control and the superheat of the refrigerant are performed. Control is performed. Thereby, there is an effect that the stability of the supercooling degree control and the superheating degree control of the refrigerant can be accelerated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing specific contents of a correction time change database according to the first embodiment of the present invention.

FIG. 3 is a timing chart showing valve opening correction control according to Embodiment 1 of the present invention.

FIG. 4 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 2 of the present invention.

FIG. 5 is a timing chart showing valve opening correction control according to Embodiment 2 of the present invention.

FIG. 6 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 3 of the present invention.

FIG. 7 is a diagram showing specific contents of a correction start condition database according to Embodiment 3 of the present invention.

FIG. 8 is a timing chart showing valve opening correction control according to Embodiment 3 of the present invention.

FIG. 9 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 4 of the present invention.

FIG. 10 is a diagram illustrating a sign relationship determined by a temperature direction determining unit according to Embodiment 4 of the present invention.

FIG. 11 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to a fifth embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 6 of the present invention.

FIG. 13 is a diagram showing specific contents of an electronic expansion valve database according to Embodiment 6 of the present invention.

FIG. 14 is a diagram showing a configuration of a refrigerant circuit including a refrigeration cycle control device according to Embodiment 7 of the present invention.

FIG. 15 is a diagram showing a configuration of a refrigerant circuit including a conventional refrigeration cycle control device.

FIG. 16 is a diagram showing specific contents of an electronic expansion valve database.

FIG. 17 is a diagram showing an example of a temperature change of a discharge temperature by a conventional refrigeration cycle control device.

[Explanation of symbols]

1 compressor, 2 four-way valve, 3A indoor heat exchanger, 3B
Outdoor heat exchanger, 4 electronic expansion valve, 5 valve opening correction unit, 1
1,11A refrigeration cycle controller, 12,12A, 20
Electronic expansion valve database, 13, 13A Correction time change database, 14, 14A Temperature difference / change calculator,
15 execution determination unit, 16 correction start condition database,
17 condition determination unit, 18 temperature direction determination unit, 19 forced correction unit, 21 discharge temperature detection unit, 22 suction temperature detection unit, 23A, 23B, 24A, 24B temperature detection unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Haruo Nakano 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Hiroyuki Odagi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (8)

[Claims] A temperature characteristic value relating to a refrigeration cycle is measured at every predetermined reference time, and a valve opening correction amount of an electronic expansion valve is determined according to a deviation between a current value and a target value of the temperature characteristic value. In a refrigeration cycle controller that performs refrigeration cycle temperature control by correcting and controlling the valve opening of an electronic expansion valve using an opening correction amount, a change value between a previous value that is a temperature characteristic value measured last time and the current value. A refrigeration cycle control device comprising control means for extending the current predetermined reference time according to 2. A temperature characteristic value relating to a refrigeration cycle is measured at each predetermined reference time, and a valve opening correction amount of an electronic expansion valve is obtained according to a deviation between a current value and a target value of the temperature characteristic value. In a refrigeration cycle controller that performs refrigeration cycle temperature control by correcting and controlling the valve opening of an electronic expansion valve using an opening correction amount, a change value between a previous value that is a temperature characteristic value measured last time and the current value. A refrigerating cycle control device, comprising: a control unit for performing a correction control of a valve opening of the electronic expansion valve when is smaller than a predetermined value. 3. The refrigeration cycle control device according to claim 2, wherein the control unit changes the predetermined value in accordance with a deviation between a current value and a target value of the temperature characteristic value. 4. The control unit further comprises: a determination unit that determines whether the positive and negative signs of the change value and the deviation have the same sign. If the determination unit determines that the signs are the same, The correction control of the valve opening of the electronic expansion valve is performed by a valve opening correction amount corresponding to the deviation at each of the predetermined reference times, according to any one of claims 1 to 3, wherein Refrigeration cycle control device. 5. The control unit further comprises: a determination unit configured to determine whether the positive and negative signs of the change value and the deviation are the same. If the determination unit determines that the signs are the same. 4. The method according to claim 1, wherein the predetermined reference time is shortened, and a correction control of the valve opening of the electronic expansion valve is forcibly performed by a fixed valve opening correction amount. Refrigeration cycle control device. 6. The control unit further comprises: a determination unit that determines whether the positive and negative signs of the change value and the deviation have the same sign. If the determination unit determines that the signs are the same, The refrigeration cycle control device according to any one of claims 1 to 3, wherein correction control of the valve opening of the electronic expansion valve is performed by a valve opening correction amount corresponding to the change value. 7. The refrigeration cycle control device according to claim 1, wherein the temperature characteristic value is a compressor discharge temperature. 8. The temperature characteristic value is a temperature difference between a condensing temperature and a pre-expansion temperature and a temperature difference between a compressor suction temperature and an evaporation temperature, and controls a valve opening of the electronic expansion valve. The refrigeration cycle control device according to any one of claims 1 to 6, wherein the supercooling degree control and the superheating degree control of the refrigerant are performed.