JP5642017B2 - Refrigeration cycle controller - Google Patents

Description

  The present invention relates to a refrigeration cycle apparatus in which a compressor, a heat exchanger, an expansion valve, and an evaporator are sequentially connected via a refrigerant pipe filled with a refrigerant, and more particularly, operation control of the refrigeration cycle apparatus. The present invention relates to a refrigeration cycle control device that performs the above.

  A conventional refrigeration cycle apparatus is formed by sequentially connecting a compressor, a heat exchanger, an expansion valve, and an evaporator through a refrigerant pipe filled with a refrigerant. As a compressor that compresses and discharges a refrigerant, a rotary type, a scroll type, and the like are known. Among these, the scroll compressor performs compression by reducing the amount of refrigerant leakage during the compression process by pressing the orbiting scroll against the fixed scroll.

  In such a scroll type compressor, the pressing force may not be generated well at the time of starting. This pressing force is normally generated using the differential pressure between the refrigerant suction side pressure (low pressure) and the discharge side pressure (high pressure), but when the compressor is started, the required differential pressure may not be generated. Because there is. In this case, the orbiting scroll cannot be fully pressed against the fixed scroll, and as a result, the compressor cannot be started smoothly.

  In order to solve such a problem, the applicant of the present invention tries to generate a pressing force of the orbiting scroll against the fixed scroll by operating the scroll compressor for a short time when starting the scroll compressor, once stopping and then starting again. A technology has been proposed (see, for example, Patent Document 1). According to the technique according to Patent Document 1, the scroll compressor can be smoothly started.

JP 2006-349278 A

  By the way, with the technique which concerns on patent document 1, as a result of starting for a short time at the time of starting of a scroll type compressor, having stopped once, and starting again, it becomes a problem whether the compressor is operating normally. In this regard, in the technology according to Patent Document 1, there is no specific description about surely starting the scroll compressor. In this respect, there is room for improvement in the technique according to Patent Document 1.

  The present invention has been made to solve the above-described problems of the prior art, and it is an object of the present invention to reliably start a scroll compressor.

The present invention includes a scroll compressor that compresses a refrigerant, a heat exchanger that condenses the compressed refrigerant discharged from the compressor, an expansion valve through which the refrigerant condensed in the heat exchanger flows, and the expansion A refrigeration cycle apparatus including an evaporator that evaporates the refrigerant expanded by the valve and returns the refrigerant to the compressor is assumed.
The refrigeration cycle control device according to the present invention includes a compressor motor control unit that controls a rotation speed of a drive motor according to the compressor, and an operation that acquires operation state information relating to an operation state of the compressor or the refrigeration cycle device. Based on the operation state information acquired by the operation state information acquisition unit during operation in a trial mode that is a fixed speed that is lower than that in the normal mode, the state information acquisition unit and the drive motor related to the compressor, A refrigeration cycle operation that performs control to stop the operation of the refrigeration cycle apparatus when the determination result of the operation continuity determination section that determines whether or not to continue the operation of the refrigeration cycle apparatus and the determination result of the operation continuity determination section are impossible A control unit, and the compressor motor control unit stops the drive motor when the refrigeration cycle operation control unit performs control related to operation stop. While controlled so, even in the re-startup after stopping the driving motor is controlled so as to start the drive motor in the trial mode, the most important feature that.

  According to the refrigeration cycle control apparatus according to the present invention, it is possible to reliably start the scroll compressor.

1 is a system configuration diagram of a heat pump water heater to which a refrigeration cycle control device according to an embodiment of the present invention is applied. It is a longitudinal section showing the whole scroll compressor applied to a heat pump unit. It is a figure which shows typically the engagement relationship of the fixed scroll and turning scroll in a scroll compressor. It is a flowchart figure with which it uses for operation | movement description of the refrigerating-cycle control apparatus which concerns on 1st Embodiment of this invention. FIGS. 4A and 4B are time charts for explaining the operation of the refrigeration cycle control apparatus according to the first embodiment. FIGS. 4A and 4B are time charts for explaining the operation of the refrigeration cycle control apparatus according to the first embodiment. FIGS. 4C and 4B are time charts for explaining the operation of the refrigeration cycle control apparatus according to the first embodiment. It is a flowchart figure with which it uses for operation | movement description of the refrigerating-cycle control apparatus which concerns on 2nd Embodiment of this invention. FIGS. 6A and 6B are time charts for explaining the operation of the refrigeration cycle control apparatus according to the second embodiment.

Hereinafter, a refrigeration cycle control apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
In addition, about the refrigerating-cycle control apparatus which concerns on 1st and 2nd embodiment shown below, the same code | symbol is attached | subjected to a common part and the overlapping description is abbreviate | omitted.

(System configuration of the heat pump water heater 11)
First, a system configuration of a heat pump water heater to which the refrigeration cycle control devices according to the first and second embodiments of the present invention are commonly applied will be described with reference to FIG. FIG. 1 is a system configuration diagram of a heat pump water heater to which the refrigeration cycle control devices according to the first and second embodiments of the present invention are commonly applied.
As shown in FIG. 1, the heat pump water heater 11 includes a heat pump unit (corresponding to the “refrigeration cycle apparatus” of the present invention) 13 and a hot water storage unit 15 in an annular shape through an outward piping 17 a and a return piping 17 b, respectively. It is configured with communication connection.

  As shown in FIG. 1, the heat pump unit 13 (hereinafter, “heat pump unit” may be referred to as “refrigeration cycle apparatus”) includes a scroll compressor 19, a heat exchanger 21, an electric expansion valve 23, and The heat pump cycle (hereinafter sometimes referred to as “refrigeration cycle”) 14 in which the evaporator 25 is connected in a ring shape through a refrigerant pipe 22 serving as a flow path for the enclosed refrigerant, and the refrigeration cycle control device 46 Prepare.

  The scroll compressor 19 has a function of compressing the refrigerant. The configuration of the compressor 19 will be described in detail later. As shown in FIG. 1, the heat exchanger 21 is water in which the refrigerant-side heat transfer pipe 21 a through which the high-temperature and high-pressure compressed refrigerant discharged from the compressor 19 circulates and the water sent from the hot water storage tank 31 circulates. A side heat transfer tube 21b is provided. The heat exchanger 21 heats water by heat exchange with a high-temperature and high-pressure compressed refrigerant.

  As shown in FIG. 1, the electric expansion valve 23 through which the refrigerant condensed in the heat exchanger 21 depressurizes the medium temperature / high pressure refrigerant and sends it to the evaporator 25 as a low temperature / low pressure refrigerant that easily evaporates. The electric expansion valve 23 adjusts the opening degree of the refrigerant flow passage to adjust the refrigerant circulation amount in the refrigeration cycle 14, and increases the opening degree to remove the medium / low pressure refrigerant from the evaporator 25. It also plays a role in sending frost in large quantities to melt frost.

  As shown in FIG. 1, the evaporator 25 evaporates the low-temperature and low-pressure refrigerant expanded by the electric expansion valve 23. Specifically, the evaporator 25 takes in the role of taking in outside air by the blower fan 27 rotated by driving of the fan motor 27a, exchanging heat between the air and the refrigerant, and absorbing heat from the outside air.

  On the other hand, the hot water storage unit 15 includes a hot water storage tank 31, a circulation pump 33, and a hot water storage control device 39, as shown in FIG. The hot water storage tank 31 plays a role of storing water supplied from a water supply source via the water supply pipe 35 and hot water supplied to the hot water supply system via the hot water supply pipe 37. The circulation pump 33 sucks low-temperature water from the bottom of the hot water storage tank 31 and discharges the sucked low-temperature water to the heat exchanger 21 on the refrigeration cycle 14 side so as to return the heated hot water to the top of the hot water storage tank 31. The hot water storage cycle 31 is formed by connecting the hot water storage tank 31, the circulation pump 33, and the heat exchanger 21 on the refrigeration cycle 14 side in an annular manner through the forward piping 17 a and the backward piping 17 b that serve as hot water flow passages, respectively. 16 is formed.

  As shown in FIG. 1, the scroll compressor 19 is provided with a compressed refrigerant temperature sensor 20 that detects the temperature of the high-temperature and high-pressure compressed refrigerant. The compressor 19 is provided with a compressed refrigerant pressure sensor (not shown) that detects the pressure of the refrigerant discharged from the compressor 19. The refrigerant pipe 22 located on the downstream side of the heat exchanger 21 is provided with a heat exchanger outlet refrigerant temperature sensor 41. In the vicinity of the evaporator 25, an outside air temperature sensor 42 for measuring the outside air temperature is provided. A heat exchanger inlet water temperature sensor 43 that measures the temperature of the water flowing into the heat exchanger 21 is provided in the forward piping 17 a located on the upstream side of the heat exchanger 21. In addition, a heat exchanger outlet water temperature sensor 45 that measures the temperature of the water flowing out from the heat exchanger 21 is provided in the return pipe 17 b located on the downstream side of the heat exchanger 21. The detection values of these temperature sensors 20, 41, 42, 43, 45 and the detection value of the compressed refrigerant pressure sensor are given to the refrigeration cycle control device 46.

  In addition, as shown in FIG. 1, hot water storage sensors 31 a to 31 e for detecting the hot water storage temperature and the amount of hot water stored in the hot water storage tank 31 are provided inside the hot water storage tank 31. Detection values of the hot water storage sensors 31 a to 31 e are given to the hot water storage control device 39.

  The hot water storage control device 39 and the refrigeration cycle control device 46 include, for example, a microcomputer (not shown) including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory) and the like (hereinafter referred to as “microcomputer”). Omitted). The microcomputer reads and executes a program stored in the ROM, and operates to perform various controls such as hot water storage operation / stop control described below.

  The hot water storage control device 39 and the refrigeration cycle control device 46 operate in cooperation with each other, thereby controlling the operation / stop of the refrigeration cycle 14, controlling the capacity / rotational speed of the compressor 19, adjusting the opening of the electric expansion valve 23, It controls the rotational speed control of the fan motor 27a, the operation / stop control of the hot water storage cycle 16, the operation / stop control of the circulation pump 33, and the like. Thereby, the hot water storage control device 39 and the refrigeration cycle control device 46 can appropriately perform the hot water storage operation, the defrosting operation, the hot water supply operation, and the like.

(Configuration of scroll compressor 19)
Next, the configuration of the scroll compressor 19 applied to the heat pump unit 13 will be described in detail with reference to FIGS. 2A and 2B. FIG. 2A is a longitudinal sectional view showing the overall configuration of a scroll compressor 19 applied to the heat pump unit 13. FIG. 2B is a diagram schematically showing an engagement relationship between the fixed scroll 53 and the orbiting scroll 55 in the scroll compressor 19.

  As shown in FIG. 2A, the scroll compressor 19 includes a fixed scroll 53 and a orbiting scroll 55, a frame 57, a drive motor 59, a main shaft 61, a crankshaft 63, a non-rotating container, and a casing 51. The illustrated lubricating oil is accommodated.

  As shown in FIG. 2A, the casing 51 includes a cylindrical body portion 51a that is in an upright state during installation, a bottom portion 51b that seals the bottom portion of the body portion 51a, and a chamber portion that seals the top portion of the body portion 51a. 51c.

  As shown in FIG. 2A, the fixed scroll 53 includes a disk-shaped end plate 53a, and a spiral wrap 53c formed upright with respect to a tooth base 53b which is one side surface of the end plate 53a. It is comprised from the outer peripheral side of the end plate 53a, and the support part 53d formed in the cylinder shape so that the lap | wrap 53c may be enclosed. The fixed scroll 53 is coupled to the dish-shaped frame 57 by a bolt or the like at the support portion 53d. The frame 57 integrally coupled with the fixed scroll 53 is fixed to the body portion 51a of the casing 51 by fixing means such as welding.

  As shown in FIG. 2A, the orbiting scroll 55 is provided so as to be orbitable within the outer peripheral edge of the frame 57 while facing the fixed scroll 53. The orbiting scroll 55 includes a disc-shaped end plate 55a, a spiral wrap 55c formed upright with respect to a tooth bottom 55b that is one side surface of the end plate 55a, and a boss provided at the center of the rear surface of the end plate 55a. Part 55d.

  As shown in FIG. 2A, the main shaft 61 with the rotor 59 a of the drive motor 59 fixed to the outer peripheral surface is rotatably supported via a main bearing 62 formed through the shaft center portion of the frame 57. The main shaft 61 is provided so as to extend from the frame 57 to the bottom portion 51 b coaxially with the axis of the fixed scroll 53. A crank 63 is provided on the side of the main shaft 61 opposite to the bottom 51b. A boss portion 55 d of the orbiting scroll 55 is rotatably attached to the crank 63 via an orbiting bearing 65. The orbiting scroll 55 is attached in a state where its axis is eccentric by a predetermined distance with respect to the axis of the fixed scroll 53. Further, the wrap 55c of the orbiting scroll 55 is overlapped with the wrap 53c of the fixed scroll 53 while being shifted by a predetermined angle in the circumferential direction.

  As shown in FIG. 2A, an Oldham ring 67 is provided between the back side of the orbiting scroll 55 and the frame 57. As a result, the orbiting scroll 55 is relatively rotated while restraining it from rotating with respect to the fixed scroll 53. When the orbiting scroll 55 is orbited in this state, a plurality of substantially crescent-shaped compression chambers 69 are formed between the wraps 53c and 55c.

  As shown in FIG. 2A, the chamber 51c of the casing 51 is provided with a refrigerant suction pipe 73 through a circular through hole 71. A suction port 75 is formed in the fixed scroll 53 positioned in the extending direction of the refrigerant suction pipe 73 as shown in FIG. 2A. The suction port 75 is provided on the outer peripheral side of the end plate 53a so as to communicate with the compression chamber 69 located on the outermost peripheral side. Thus, a refrigerant suction chamber 77 is formed.

  A discharge port 79 is formed in the center of the fixed scroll 53 as shown in FIG. 2A. The discharge port 79 is provided at the axial center portion of the end plate 53a so as to communicate with the compression chamber 69 located on the innermost peripheral side. As shown in FIG. 2A, the body 51a of the casing 51 is provided with a refrigerant discharge pipe 83 through a circular through hole 82. The compressed refrigerant compressed by the compressor 19 is sent to the heat exchanger 21 through the refrigerant discharge pipe 83. As shown in FIG. 2A, the chamber portion 51 c of the casing 51 is provided with a hermetic terminal 85 for supplying power to the drive motor 59.

  Next, the flow of the refrigerant in the scroll compressor 19 will be described with reference to FIG. 2A. The solid line arrow in FIG. 2A indicates the flow of the refrigerant in the compressor 19. As shown in FIG. 1 and FIG. 2A, the refrigerant returned from the evaporator 25 is compressed by the compression mechanism portion (consisting of the fixed scroll 53 and the orbiting scroll 55) through the refrigerant suction pipe 73. The high-temperature and high-pressure compressed refrigerant compressed by the compression mechanism portions 53 and 55 is discharged to the discharge chamber 81 formed inside the chamber portion 51c through the discharge port 79 as shown by the solid line arrow in FIG. 2A. . Thereafter, the high-temperature and high-pressure compressed refrigerant is discharged to the heat exchanger 21 through the refrigerant discharge pipe 83 as shown in FIG. 2A.

  As shown in FIG. 2B, the scroll compressor 19 configured as described above performs rotational motion while pressing the turning scroll 55 against the fixed scroll 53 to compress the refrigerant. In order to press the orbiting scroll 55 against the fixed scroll 53, a pressing force is essential. If the pressing force is insufficient, the compression work cannot be performed properly. In addition, when the pressing force is too small, the orbiting scroll 55 is separated from the fixed scroll 53 and falls into a so-called rollover state. When falling into such an overturned state, not only the efficiency of the refrigeration cycle 14 is reduced, but also problems such as abnormal noise and abnormal vibration are caused.

  This pressing force is normally generated by using the differential pressure between the refrigerant suction side pressure (low pressure) and the discharge side pressure (high pressure). It may not be generated successfully. In this case, if it can be confirmed whether or not the pressing force of the orbiting scroll 55 against the fixed scroll 53 can be properly generated, the scroll compressor 19 can be reliably started, and the refrigeration cycle system It is not difficult to imagine that it will contribute to the improvement of the reliability.

[Refrigeration cycle control devices 46A and 46B according to the first and second embodiments]
The refrigeration cycle control devices 46A and 46B according to the first and second embodiments (sometimes collectively referred to by reference numeral “46”) have been made in view of the above technical background, and are shown in FIG. The compressor motor control unit 47, the operation state information acquisition unit 48, the operation continuity determination unit 49, and the refrigeration cycle operation control unit 50 are configured.

  The compressor motor control unit 47 has a function of controlling the rotational speed of the drive motor 59 associated with the scroll compressor 19.

The operation state information acquisition unit 48 has a function of acquiring operation state information related to the operation state of the compressor 19 or the heat pump unit (refrigeration cycle apparatus) 13. Specifically, the operation state information acquisition unit 48, for example, a motor that flows to the drive motor 59 related to the compressor 19 during operation of the drive motor 59 in the trial mode that is a fixed speed that is lower than that in the normal mode. The driving state information is acquired by detecting the current (or motor power) and considering the detected value as the driving state information.

  The operation continuity determination unit 49 determines whether the refrigeration cycle apparatus 13 can continue operation based on the operation state information acquired by the operation state information acquisition unit 48 while the drive motor 59 related to the compressor 19 is operating in the trial mode. To do. Specifically, the operation continuity determination unit 49 determines whether the refrigeration cycle apparatus 13 can continue operation based on whether or not the motor current flowing through the drive motor 59 exceeds a preset determination reference value. .

  The determination principle relating to whether or not the refrigeration cycle apparatus 13 can continue to operate is as follows. That is, the scroll compressor 19 may fall into a rollover state when it is started. Under such a rollover state, the compressor 19 does not perform compression work (there is almost no load), so the drive motor 59 rotates idle. In short, when the compressor 19 falls over, the motor current of the drive motor 59 (same motor power) hardly increases.

  Therefore, the value of the motor current flowing through the drive motor 59 when the compressor 19 is operating normally is set as a determination reference value. As a result, the motor current flowing through the drive motor 59 is detected while the drive motor 59 related to the compressor 19 is being operated in the trial mode, which is a fixed speed that is lower than that in the normal mode. Based on whether or not it exceeds, it can be determined whether or not the compressor 19 has fallen over.

  In addition, the case where the compressor 19 has fallen over means that the operation of the refrigeration cycle apparatus 13 cannot be continued. This is because the refrigeration cycle apparatus 13 cannot perform the original work of the heat pump, such as picking up heat, when the compressor 19 is in an overturned state where no compression work is performed. Therefore, the operation continuation determination unit 49 determines whether the refrigeration cycle apparatus 13 can continue operation based on whether or not the motor current of the drive motor 59 related to the compressor 19 exceeds a preset determination reference value. You can see that

  The refrigeration cycle operation control unit 50 functions to perform control to temporarily stop the operation of the refrigeration cycle apparatus 13 when the determination result of the operation continuation enable / disable determination unit 49 indicates that the operation cannot be continued. The refrigeration cycle operation control unit 50 has a function of counting the cumulative number n related to the operation stop every time the control related to the operation stop of the refrigeration cycle apparatus 13 is executed. The cumulative number n related to the stoppage of operation is initialized every time a new boiling operation is started.

[Operation of First Refrigeration Cycle Control Device 46A]
Next, the operation of the first refrigeration cycle control device 46A according to the first embodiment will be described in detail with reference to FIG. FIG. 3 is a flowchart for explaining the operation of the first refrigeration cycle control device 46A. The flowchart shown in FIG. 3 is started when an instruction operation related to the boiling operation of the heat pump water heater 11 is performed.

(Explanation of operations along the flowchart)
In step S11, in response to an instruction operation related to the boiling operation of the heat pump water heater 11, the compressor motor control unit 47 fixes the drive motor 59 related to the scroll compressor 19 at a lower speed than in the normal mode. The apparatus is started in a trial mode at a high speed (for example, about 1000 (rotation / minute) to 2500 (rotation / minute) ).

  In step S11, the first refrigeration cycle control device 46A controls the opening degree of the electric expansion valve 23, the water circulation flow rate of the circulation pump 33, or the rotational speed of the fan motor 27a according to a predetermined procedure related to the trial mode. To do. The control according to the predetermined procedure related to the trial mode is a value set in advance in consideration of the trial operation of the opening degree of the electric expansion valve 23, the water circulation flow rate of the circulation pump 33, or the rotational speed of the fan motor 27a. This means that the refrigeration cycle apparatus 13 is operated at a value suitable for the trial operation, such as a value determined by a variable depending on the environmental conditions or the like.

  In step S12, the first refrigeration cycle control device 46A waits until the determination time elapses while monitoring whether the determination time has elapsed during the operation of the drive motor 59 in the trial mode. As this determination time, a time set in advance or a time determined by a variable depending on environmental conditions is appropriately adopted. When the determination time has elapsed, the first refrigeration cycle control device 46A advances the process flow to the next step S13.

  In step S13, the driving state information acquisition unit 48 detects the motor current flowing through the driving motor 59 during the driving of the driving motor 59 in the trial mode, and regards the detected value as the driving state information, thereby driving state information. To get.

  In step S14, the operation continuation determination unit 49 determines that the motor current flowing through the drive motor 59 is appropriately determined based on the operation state information acquired in step S13, such as a determination reference value (for example, 1.5A to 2.5A). Whether the operation of the refrigeration cycle apparatus 13 can be continued is determined based on whether or not the changeable value is exceeded. As a result of the determination in step S14, the first refrigeration cycle control device 46A determines that the motor current has exceeded the determination reference value (the compressor 19 has not fallen over; operation can be continued). When the process flow proceeds to step S15A, the determination is made that the motor current is less than the determination reference value (the compressor 19 is in the overturned state; the operation cannot be continued). Is advanced to step S16.

  The first refrigeration cycle control device 46A determines that the motor current is less than the determination reference value (the compressor 19 is in the overturned state; the operation cannot be continued) ("No" in step S14). Even if there is a history of returning to step S11 via steps S16 to S17, the motor current exceeded the criterion value during the subsequent restart (step S11) (compressor 19 Is determined not to fall over; operation can be continued), the process flow proceeds to step S15A.

In step S15A, the compressor motor control unit 47 shifts the operation mode of the drive motor 59 related to the compressor 19 from the trial mode to the normal mode. Specifically, the compressor motor control unit 47 controls the drive motor 59 to normally operate at a high speed variable speed (for example, about 2500 (rotations / minute) to 4500 (rotations / minute) ).

In step S15A, the first refrigeration cycle control device 46A controls the opening degree of the electric expansion valve 23, the water circulation flow rate of the circulation pump 33, or the rotation speed of the fan motor 27a according to a predetermined procedure related to the normal mode. To do. The control according to the predetermined procedure related to the normal mode is set in advance in consideration of the normal operation, the opening degree of the electric expansion valve 23, the water circulation flow rate of the circulation pump 33, or the rotational speed of the fan motor 27a. It means that the refrigeration cycle apparatus 13 is operated at a value suitable for normal operation, such as a value determined by a value or a variable depending on environmental conditions.
When the control according to the predetermined procedure related to the normal mode in step S15A is completed, the first refrigeration cycle control device 46A ends a series of processing flows.

  As a result of the determination in step S14, if it is determined that the motor current is less than the determination reference value (the compressor 19 is in the overturned state; the operation cannot be continued), in step S16, the refrigeration cycle operation control unit 50 performs control to temporarily stop the operation of the refrigeration cycle apparatus 13. Along with the stop control of the refrigeration cycle operation control unit 50, the compressor motor control unit 47 performs control to temporarily stop the operation of the drive motor 59 related to the scroll compressor 19.

  In step S <b> 17, the refrigeration cycle operation control unit 50 sets in advance the cumulative number n related to the operation stop that is counted (incremented; n = n + 1) every time the control related to the operation stop of the refrigeration cycle apparatus 13 is executed. It is determined whether or not the number of times N (for example, a value that can be appropriately changed, such as about 4 to 20 times) has been exceeded. As a result of the determination in step S17, the first refrigeration cycle control device 46A advances the process flow to step S18 when it is determined that the cumulative number n related to operation stop exceeds the set number N. On the other hand, when it is determined that the cumulative number n related to the operation stop is less than the set number N, the flow of the process is returned to step S11, and the processes after step S11 are performed.

As a result of the determination in step S17, when it is determined that the cumulative number n related to the operation stop exceeds the set number N, in step S18, the refrigeration cycle operation control unit 50 abnormally operates the refrigeration cycle apparatus 13. Control to stop. Along with the abnormal stop control of the refrigeration cycle operation control unit 50, the compressor motor control unit 47 performs control to abnormally stop the operation of the drive motor 59 related to the scroll compressor 19. Further, the fact that the operation of the refrigeration cycle apparatus 13 has been abnormally stopped is displayed (abnormal notification) on, for example, an operation panel (not shown) of the heat pump water heater 11. In the refrigeration cycle apparatus 13 related to this abnormal report, quick maintenance is performed. As a result, the operating rate of the refrigeration cycle apparatus 13 can be improved.
When the control related to the abnormal stop / abnormal report in step S18 is completed, the first refrigeration cycle control device 46A ends the flow of a series of processes.

(Description of operation along the time chart)
Next, the operation of the first refrigeration cycle control device 46A according to the first embodiment will be described in detail with reference to FIGS. 4A to 4C. (A), (b) of FIG. 4A, (a), (b) of FIG. 4B, and (a), (b) of FIG. 4C are times used to explain the operation of the first refrigeration cycle control device 46A. It is a chart figure.
As the drive motor 59 associated with the compressor 19 is activated, other devices (such as the electric expansion valve 23, the circulation pump 33, and the fan motor 27a) that configure the refrigeration cycle apparatus 13 are activated simultaneously. However, in the following operation description, the movement of other devices is omitted.

  First, when the determination result of the operation continuation determination unit 49 indicates that operation can be continued (see “Yes” in step S14), the compressor motor controls the drive motor 59 to operate in the normal mode (see step S15A). The operation of the control unit 47 will be described with reference to FIGS. 4A and 4B. This operation is “the compressor motor control unit controls the drive motor to operate in the normal mode at a higher speed than in the trial mode when the determination result of the operation continuation determination unit is continuable.” It corresponds to.

  When the refrigeration cycle apparatus 13 is activated, as shown in FIG. 4A (a), the drive motor 59 associated with the scroll compressor 19 has a fixed speed NL that is lower than the rotational speed NN in the normal mode. It starts in a certain test mode (corresponding to step S11 in FIG. 3).

  Here, as shown in FIG. 4A (b), if the determination reference value of the motor current is set to Pj and the determination time from the start to the determination is Tj, at the time when the determination time Tj has elapsed after the start. Then, it is determined whether or not the motor current value exceeds the determination reference value Pj (corresponding to step S14 in FIG. 3). The determination time Tj varies depending on the scale and application of the refrigeration cycle apparatus 13, but is generally about 30 seconds to 300 seconds. If the determination time Tj is too short, the operation state of the refrigeration cycle apparatus 13 is not yet stable, and thus accurate determination cannot be performed. On the other hand, if the determination time Tj is too long, time is spent unnecessarily, and startability is impaired.

  In the time chart shown in (b) of FIG. 4A, since the motor current value at the determination time Tj exceeds the determination reference value Pj, it is determined that the compressor 19 has not fallen over (continuation of operation is possible). (See “Yes” in step S14 in FIG. 3).

  When it is determined that the compressor 19 is not in the capsized state (operation continuation is possible), as shown in FIG. 4A, the drive motor 59 associated with the scroll compressor 19 has a high speed. The engine is operated at an increased speed up to the rotational speed NN in the normal mode, which is a variable speed (corresponding to step S15A in FIG. 3).

  Next, when the determination result of the operation continuation determination unit 49 indicates that the operation cannot be continued (see “No” in step S14), the refrigeration cycle operation is performed to temporarily stop the operation of the refrigeration cycle apparatus 14 (see step S16). The operation of the control unit 50 will be described with reference to (a) and (b) of FIG. 4B. This operation corresponds to “a refrigeration cycle operation control unit that performs control to stop the operation of the refrigeration cycle apparatus when the determination result of the operation continuation determination unit is incapable of continuing operation”.

  As shown in (a) and (b) of FIG. 4B, since the motor current value does not reach the determination reference value Pj when the determination time Tj has elapsed after the start of the refrigeration cycle apparatus 13, the compressor 19 rolls over. A determination is made that the vehicle is in a state (unable to continue operation) (see “NO” in step S14 in FIG. 3).

  When it is determined that the compressor 19 is in the overturned state (operation continuation is impossible), the operation of the refrigeration cycle apparatus 13 is temporarily stopped (corresponding to step S16 in FIG. 3). Along with this, the drive motor 59 associated with the scroll compressor 19 is also temporarily stopped as shown in FIGS. 4B and 4B.

  Next, even when the drive motor 59 is restarted after being stopped (when the process of step S11 is executed after “No” in steps S16 to S17), the drive motor 59 is started in the trial mode (see step S11). ) The operation of the compressor motor control unit 47 that performs control is described with reference to (a) and (b) of FIG. 4C. This operation is performed by “the compressor motor control unit controls the drive motor to start in the trial mode even when the drive motor 59 is restarted after being stopped” and “the compressor motor control unit Is the time of restart after stopping the drive motor 59, and when the determination result of the operation continuity determination unit based on the operation state information after the restart indicates that the operation can be continued, Control to operate in mode.

  When the refrigeration cycle apparatus 13 is started, as shown in FIG. 4C (a), the drive motor 59 associated with the scroll compressor 19 has a fixed speed NL that is lower than the rotational speed NN in the normal mode. It starts in a certain test mode (corresponding to step S11 in FIG. 3). When the determination time Pj elapses after the refrigeration cycle apparatus 13 is started, the motor current value is less than the determination reference value Pj as shown in FIG. 4C (b). For this reason, the operations of the refrigeration cycle apparatus 13 and the drive motor 59 related to the compressor 19 are temporarily stopped as shown in (a) and (b) of FIG. 4C (corresponding to step S16 of FIG. 3). ).

Thereafter, after a predetermined waiting time Tw1, the refrigeration cycle apparatus 13 is restarted (corresponding to step S11 in FIG. 3) as shown in (a) and (b) of FIG. 4C. The waiting time Tw1 from the stop to the restart of the refrigeration cycle apparatus 13 varies depending on the scale and use of the refrigeration cycle apparatus 13, but about 10 to 120 seconds is appropriate. If the waiting time Tw1 is too short, the differential pressure between the refrigerant suction side pressure (low pressure) and the discharge side pressure (high pressure) is not eliminated, and the compressor 19 is started with a large differential pressure. May cause excessive load. If the waiting time Tw1 is too long, the differential pressure generated by the start-up operation in the trial mode is completely eliminated, and the refrigerant and the refrigerating machine oil return to the same state as the initial state (sleep state). It may end up. Therefore, an appropriate standby time Tw1 is set based on the technical background described above.
After the waiting time Tw1 has elapsed, the refrigeration cycle apparatus 13 is restarted.

  Even after the refrigerating cycle apparatus 13 is restarted, the drive motor 59 associated with the scroll compressor 19 starts in the trial mode as shown in FIG. 4C (see step S11 in FIG. 3).

  When the determination time Tj elapses after the refrigeration cycle apparatus 13 is restarted, as shown in FIG. 4C (b), the motor current value exceeds the determination reference value Pj. A determination is made that the vehicle has not fallen (operation can be continued) (see “Yes” in step S14 in FIG. 3).

  When it is determined that the compressor 19 is not in the overturned state (operation continuation is possible), as shown in (a) of FIG. 4C, the drive motor 59 related to the scroll compressor 19 is in the normal mode. The operation speed is increased to the rotational speed NN at that time (see step S15A in FIG. 3).

(Operational effect of first refrigeration cycle control device 46A)
In the first refrigeration cycle control device 46A, the refrigeration cycle is based on the operating state information relating to the operating state of the compressor 19 or the refrigeration cycle apparatus 13 acquired during operation of the drive motor 59 related to the compressor 19 in the test mode. It is determined whether or not the operation of the device 13 can be continued. As a result of this determination, when the compressor 19 is not in an overturned state and a determination is made regarding continued operation of the refrigeration cycle apparatus 13, the drive motor 59 is controlled to operate in the normal mode. Adopted.

  According to the first refrigeration cycle control device 46A, after confirming that the refrigeration cycle device 13 is in a state where operation can be continued, the operation mode of the drive motor 59 related to the compressor 19 is shifted from the trial mode to the normal mode. . Therefore, it is possible to reliably start the scroll compressor 19 while suppressing the occurrence of abnormal noise and abnormal vibration during abnormal operation and suppressing the progress of abnormal wear inside the compressor 19. Thereby, the reliability of the refrigeration cycle apparatus 13 can be improved.

  As a result of the determination regarding whether or not the refrigeration cycle apparatus 13 can continue to be operated, if the compressor 19 is in an overturned state and the determination is made that the refrigeration cycle apparatus 13 cannot continue to operate, the refrigeration cycle apparatus 13 is once operated. Is stopped, waits for the waiting time Tw1, and starts again. By restarting the compressor 19 according to such a procedure, the refrigerant agitating action including the refrigerating machine oil in the compressor 19 and the refrigerant suction side (low pressure) pressure and discharge side generated by the start-up operation in the trial mode ( Combined with the differential pressure between the high pressure) pressure, the overturning state of the compressor 19 can be avoided. In addition, even when the refrigeration cycle apparatus 13 is restarted, the configuration in which the drive motor 59 associated with the compressor 19 is repeatedly operated in the test mode is employed, which can contribute to further improvement in reliability.

  Further, as the operation state information related to the operation state of the compressor 19 or the refrigeration cycle apparatus 13, for example, a motor current (or motor power) that flows in the drive motor 59 related to the compressor 19 is employed. The inverter that controls the rotational speed of the drive motor 59 related to the compressor 19 inherently has a function of detecting the motor current flowing through the drive motor 59. Therefore, the first refrigeration cycle control device 46A can be realized without requiring additional motor current detection means.

  Further, every time the control related to the operation stop of the refrigeration cycle apparatus 13 is executed, the cumulative number n related to the operation stop is counted (incremented), and until the cumulative number n exceeds the preset number n, The refrigeration cycle apparatus 13 is repeatedly stopped, restarted after the waiting time Tw1, the start-up operation of the drive motor 59 associated with the compressor 19 in the trial mode, and the operation continuity determination is repeated to obtain the determination regarding operation continuation. When normal startup is confirmed, a configuration that shifts to startup operation in normal mode is adopted.

  The overturning phenomenon at the start of the compressor 19 is a stagnation start (starting from a state in which the operation of the refrigeration cycle apparatus 13 has not been continued for a certain period of time and the temperature of the compressor 19 has decreased). It tends to occur frequently. However, in the case where the drive motor 59 related to the compressor 19 is operated in the trial mode at the first start after sleeping and the normal start is confirmed after obtaining the determination regarding the continued operation, It is empirically known that the compressor 19 can often be operated normally when it is shifted.

  Therefore, according to the first refrigeration cycle control device 46A, it can be expected that even the compressor 19 in the stagnation state is reliably started.

[Operation of Second Refrigeration Cycle Control Device 46B]
Next, the operation of the second refrigeration cycle control device 46B according to the second embodiment will be described in detail with reference to FIG. FIG. 5 is a flowchart for explaining the operation of the second refrigeration cycle control device 46B. The flowchart shown in FIG. 5 is started when an instruction operation related to the boiling operation of the heat pump water heater 11 is performed.
Note that the operation of the first refrigeration cycle control device 46A and the operation of the second refrigeration cycle control device 46B are the same except for step S15B shown in FIG. Therefore, the operation of the second refrigeration cycle control device 46B will be described by describing step S15B shown in FIG.

(Explanation of operations along the flowchart)
In step S15B, the refrigeration cycle operation control unit 50 performs control to temporarily stop the operation of the refrigeration cycle apparatus 13. Along with the stop control, the compressor motor control unit 47 performs control to temporarily stop the operation of the drive motor 59 related to the scroll compressor 19.

  In the subsequent step S15A, the compressor motor control unit 47 shifts the operation mode of the drive motor 59 related to the compressor 19 from the trial mode to the normal mode. The operation of the first refrigeration cycle control device 46A The same.

  There are two processing paths for proceeding to the processing related to step S15B in FIG. The first is a case where it is determined that the motor current exceeds the determination reference value (the compressor 19 has not fallen over; operation can be continued) as a result of the determination in step S14. The second is that even if there is a history that the motor current is less than the judgment reference value (the compressor 19 is in the overturned state; the operation cannot be continued), This is a case where a determination is made that the motor current has exceeded the determination reference value (the compressor 19 has not fallen over; operation can be continued) at the start (step S11).

(Description of operation along the time chart)
Next, when the determination result of the operation continuation determination unit 49 indicates that the operation can be continued (see “Yes” in step S14 in FIG. 5), control is performed to stop the drive motor 59 (see step S15B in FIG. 5). The operation of the compressor motor control unit 47 that controls the drive motor 59 to operate in the normal mode (see step S15A in FIG. 5) at the time of restart after the stop is illustrated in FIGS. ) Will be described. FIGS. 6A and 6B are time charts for explaining the operation of the refrigeration cycle control device 46B according to the second embodiment.
Note that this operation is “the compressor motor control unit controls the drive motor to stop when the determination result of the operation continuation determination unit can continue the operation, and the drive is restarted after the stop. This corresponds to “controlling the motor to operate in the normal mode”.

  When the refrigeration cycle apparatus 13 is activated, as shown in FIG. 6 (a), the drive motor 59 associated with the scroll compressor 19 has a fixed speed NL that is lower than the rotational speed NN in the normal mode. It starts in a certain test mode (corresponding to step S11 in FIG. 5). When the determination time Pj has elapsed after the start of the refrigeration cycle apparatus 13, the motor current value exceeds the determination reference value Pj as shown in FIG. 6B (“Yes” in step S14 of FIG. 5). reference).

  In this case, in the first embodiment, as shown in (a) and (b) of FIG. 4A, when the motor current value is determined to exceed the determination reference value Pj, the drive related to the compressor 19 is performed. The operation mode of the motor 59 was immediately shifted from the trial mode to the normal mode.

  In contrast, in the second embodiment, as shown in FIGS. 6A and 6B, when it is determined that the motor current value exceeds the determination reference value Pj, the refrigeration cycle apparatus 13 and The operation of the drive motor 59 related to the compressor 19 is temporarily stopped (corresponding to step S15B in FIG. 5).

After the operation of the refrigeration cycle apparatus 13 and the drive motor 59 associated with the compressor 19 is stopped, the refrigeration cycle apparatus 13 is restarted after a predetermined waiting time Tw2 as shown in FIGS. (Corresponding to step S15A in FIG. 5). The waiting time Tw2 from the stop to the restart of the refrigeration cycle apparatus 13 varies depending on the scale and application of the refrigeration cycle apparatus 13, but about 10 to 120 seconds is appropriate as with the waiting time Tw1. When the waiting time Tw2 is too short, the differential pressure between the refrigerant suction side pressure (low pressure) and the discharge side pressure (high pressure) is not eliminated, and the compressor 19 is started with a large differential pressure. May cause excessive load. If the waiting time Tw2 is too long, the differential pressure generated by the start-up operation in the trial mode is completely eliminated, and the refrigerant and refrigerating machine oil return to the same state as the initial state (sleep state). It may end up. Therefore, an appropriate standby time Tw2 is set based on the technical background described above.
After the waiting time Tw2 elapses, the refrigeration cycle apparatus 13 is restarted.

  After the refrigerating cycle apparatus 13 is restarted, the drive motor 59 associated with the scroll compressor 19 is started in the normal mode as shown in FIG. 6A (corresponding to step S15A in FIG. 5).

(Operational effect of second refrigeration cycle control device 46B)
In the second refrigeration cycle control device 46B, the start-up operation in the trial mode of the drive motor 59 related to the compressor 19, the operation continuity determination, the operation stop of the refrigeration cycle device 13 when the operation continuation determination is made, A configuration is adopted in which the refrigeration cycle apparatus 13 is started through a series of procedures related to restart after the waiting time Tw2 and start-up operation of the drive motor 59 related to the compressor 19 in the normal mode.

  According to the second refrigeration cycle control device 46B, it is possible to improve the reliability of the refrigeration cycle device 13 and improve the startability.

[Other Embodiments]
The plurality of embodiments described above show examples of implementation of the present invention. Therefore, the technical scope of the present invention should not be limitedly interpreted by these. This is because the present invention can be implemented in various forms without departing from the gist or main features thereof.

For example, the refrigeration cycle control device 46 according to the present invention may adopt a mode that is applied to an application for performing operation control of a supercritical cycle device in which the pressure on the high pressure side is equal to or higher than the critical pressure of the refrigerant. Examples of the type of refrigerant used in this case include carbon dioxide (CO ₂ ) refrigerant. In a supercritical cycle apparatus in which the pressure on the high pressure side is equal to or higher than the critical pressure of the refrigerant, the pressure difference between the high pressure and the low pressure in the cycle is large. For this reason, as a compressor used here, it is calculated | required that it can endure the environment where the pressure difference between a high pressure and a low pressure becomes large. Therefore, the refrigeration cycle control device according to the present invention capable of smoothly and accurately starting the compressor 19 regardless of the pressure difference between the high pressure and the low pressure controls the operation of the supercritical cycle device. It is particularly effective when applied to the intended use.

  Moreover, the refrigerating cycle control apparatus 46 which concerns on this invention is applied to the use which performs operation control of the heat pump unit (refrigeration cycle apparatus) 13 of the heat pump water heater 11 as demonstrated in 1st and 2nd embodiment of this invention. be able to. The heat pump unit (refrigeration cycle apparatus) 13 of the heat pump water heater 11 also has a large pressure difference between the high pressure and the low pressure as in the supercritical cycle apparatus. Therefore, the refrigeration cycle control device according to the present invention capable of smoothly and accurately starting the compressor 19 regardless of the pressure difference between the high pressure and the low pressure is a heat pump unit ( The present invention is particularly effective when applied to an application for controlling the operation of the refrigeration cycle apparatus 13.

  In the first and second embodiments of the present invention, the heat pump unit 13 of the hot water storage type heat pump water heater 11 is exemplified and described as the refrigeration cycle apparatus, but the present invention is not limited to this example. The refrigeration cycle apparatus according to the present invention may be, for example, a refrigeration cycle apparatus used for an instantaneous heat pump water heater that directly supplies hot water, an air conditioner represented by an air conditioner, a chiller unit, or the like.

  In the first and second embodiments of the present invention, motor current (motor power may be used) that flows through the drive motor 59 related to the compressor 19 as the operating state information related to the operating state of the compressor 19 or the refrigeration cycle apparatus 13. However, the present invention is not limited to this example. As the “operating state information” according to the present invention, any information can be used as long as it can set a determination reference value relating to whether or not to continue operation, such as a current flowing through the refrigeration cycle apparatus 13 (which may be power consumption). Can also be adopted.

  In the first and second embodiments of the present invention, a motor current (motor power may be used as a determination reference value related to whether or not to continue operation may be a predetermined threshold value indicating whether or not the compressor 19 is in the rollover state. However, the present invention is not limited to this example. The “determination reference value related to whether or not to continue operation” according to the present invention is not only a predetermined value set in advance, but also a value that is variably set according to the ambient conditions such as the outside air temperature and the incoming water temperature. Good. In short, any value can be adopted as long as it is possible to determine whether the refrigeration cycle apparatus (including the compressor 19) 13 can continue to operate.

  In the first and second embodiments of the present invention, whether or not the motor current value exceeds the determination reference value Pj when the determination time Tj elapses after the refrigeration cycle apparatus 13 is started (restarted). Although an example of determination has been described, the present invention is not limited to this example. For example, it is determined whether or not the motor current value exceeds the determination reference value Pj at an appropriate timing during the start (restart) operation of the refrigeration cycle apparatus 13, and the determination result that the motor current value exceeds the determination reference value Pj. When the above is obtained, the operation mode of the drive motor 59 related to the scroll compressor 19 may be shifted from the trial mode to the normal mode.

  In the first and second embodiments of the present invention, the mode in which the drive motor 59 related to the compressor 19 is operated in the trial mode when the refrigeration cycle apparatus 13 is started (restarted) has been described as an example. The invention is not limited to this example. If normal startup is not possible even after multiple restarts, it is also effective to change the startup conditions. That is, if the motor current value does not exceed the determination reference value Pj even after restarting a plurality of times, the starting rotational speed of the drive motor 59 related to the trial mode is changed to the second starting rotational speed, or the electric expansion The valve 23 may be restarted with the second opening or the rotational speed of the fan motor 27a as the second rotational speed. The refrigeration cycle apparatus 13 has various operating states depending on environmental conditions, and also changes with time, and therefore, there is a part where the operation of each design component cannot be uniquely determined. In such a case, by providing the second set value, it is possible to absorb changes in the refrigeration cycle operating conditions that change due to environmental conditions and the like, perform reliable operation, and suppress unnecessary abnormality reporting. . Of course, third, fourth, and multiple stages of setting values may be provided.

  It is also effective to make the setting so that the fan motor 27a is not operated (operation stopped, the rotation speed is zero) and the electric expansion valve 23 is closed (zero opening) at the time of activation (reactivation). This is because it is possible to promote a decrease in the suction pressure by not operating the fan motor 27a, or to increase the discharge pressure by closing the electric expansion valve 23. By taking in various operations of the components of the refrigeration cycle and determining whether to continue the operation based on the operation state information, it is possible to further improve the reliability and secure the start-up stability.

  Finally, as the heat pump water heater 11 according to the embodiment of the present invention, a mode in which the heat pump unit 13 and the hot water storage unit 15, which are separate from each other, are connected to each other via the outward piping 17a and the backward piping 17b, respectively. Although illustrated and described, the present invention is not limited to this example. The aspect of the heat pump water heater 11 in which the heat pump unit 13 and the hot water storage unit 15 are integrally configured, and the constituent members 13 and 15 are connected to each other via the forward piping 17a and the backward piping 17b, respectively. Included in range range.

11 Heat pump water heater 13 Heat pump unit (refrigeration cycle equipment)
DESCRIPTION OF SYMBOLS 15 Hot water storage unit 19 Compressor 20 Compression refrigerant temperature sensor 21 Heat exchanger 23 Electric expansion valve 25 Heat exchanger 27 Blower fan 27a Fan motor 31 Hot water storage tank 33 Circulation pump 39 Hot water storage control device 46A 1st freezing cycle control device 46B 2nd Refrigeration cycle control device 47 Compressor motor control unit 48 Operating state information acquisition unit 49 Operation continuity determination unit 50 Refrigeration cycle operation control unit 53 Fixed scroll 55 Orbiting scroll 59 Drive motor

Claims (8)

A scroll compressor that compresses the refrigerant, a heat exchanger that condenses the compressed refrigerant discharged from the compressor, an expansion valve through which the refrigerant condensed in the heat exchanger flows, and an expansion valve that is expanded. A refrigeration cycle apparatus comprising an evaporator for evaporating the refrigerant,
A compressor motor controller for controlling the rotational speed of a drive motor according to the compressor;
An operation state information acquisition unit for acquiring operation state information related to the operation state of the compressor or the refrigeration cycle apparatus;
The operation of the refrigeration cycle apparatus is performed based on the operation state information acquired by the operation state information acquisition unit while the drive motor related to the compressor is operated in a trial mode that is a fixed speed that is lower than that in the normal mode. An operation continuation determination unit for determining whether to continue,
A refrigeration cycle operation control unit that performs control to stop the operation of the refrigeration cycle apparatus when the determination result of the operation continuity determination unit is incapable of continuing operation;
The compressor motor control unit controls the drive motor to stop when the refrigeration cycle operation control unit performs control related to operation stop, while restarting after the drive motor is stopped Also, the drive motor is controlled to start in the trial mode.
Refrigeration cycle control apparatus characterized by. The refrigeration cycle control device according to claim 1,
The compressor motor control unit controls the drive motor to operate in a normal mode at a higher speed than in the trial mode when the determination result of the operation continuation determination unit is operable.
A refrigeration cycle control device. The refrigeration cycle control device according to claim 1 or 2,
The compressor motor control unit is at the time of restart after stopping the drive motor, and the determination result of the operation continuation determination unit based on the operation state information after the restart is enabled to continue operation. The drive motor is controlled to operate in the normal mode,
A refrigeration cycle control device. The refrigeration cycle control device according to any one of claims 1 to 3 ,
The refrigeration cycle operation control unit counts the cumulative number n related to the operation stop every time the control related to the operation stop of the refrigeration cycle apparatus is executed, and the cumulative number n exceeds the preset number of times. In the meantime, at the time of restart after once stopping the operation of the refrigeration cycle apparatus, the determination result of the operation continuation determination unit based on the operation state information after the restart is enabled to continue operation If so, send a message to that effect to the compressor motor controller,
The compressor motor control unit that has received the determination result relating to the continuation of operation controls the drive motor to operate in the normal mode.
A refrigeration cycle control device. The refrigeration cycle control device according to any one of claims 1 to 3 ,
The refrigeration cycle operation control unit counts the cumulative number n related to the operation stop every time the control related to the operation stop of the refrigeration cycle apparatus is executed, and the cumulative number n exceeds a preset number of times. However, when the operation of the refrigeration cycle apparatus is restarted after being temporarily stopped, and the determination result of the operation continuation determination unit based on the operation state information after the restart is not continuation of operation In order to abnormally stop the operation of the refrigeration cycle apparatus,
A refrigeration cycle control device. The refrigeration cycle control device according to claim 1 ,
The compressor motor control unit controls the drive motor to stop when the determination result of the operation continuation determination unit is continuation of operation, and the restarts the motor after the stop. Control to drive in normal mode,
A refrigeration cycle control device. The refrigeration cycle control device according to any one of claims 1 to 6 ,
Applicable to applications that control the operation of supercritical cycle equipment in which the pressure on the high pressure side exceeds the critical pressure of the refrigerant,
A refrigeration cycle control device. The refrigeration cycle control device according to any one of claims 1 to 6 ,
Applicable for use to control operation of heat pump unit of heat pump water heater,
A refrigeration cycle control device.

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