JP6079831B2 - Refrigeration air conditioner - Google Patents

Description

  The present invention relates to a refrigeration air conditioner, and more particularly, to a refrigeration air conditioner having a refrigerant circuit in which refrigerant circulates and a control device that controls operation of equipment constituting the refrigerant circuit.

  Conventionally, in a refrigerating and air-conditioning apparatus having a refrigerant circuit in which a refrigerant circulates, when the refrigerant leaks and the concentration of the refrigerant in the air-conditioned space increases, an ignition accident occurs in the case of a refrigerant having slight or strong flammability, In the case of a toxic refrigerant, an accident of poisoning may occur, and in the case of a non-flammable refrigerant, an accident due to lack of oxygen or abnormal heart rate may occur. As an index for such an accident, a limit concentration is determined for each refrigerant.

  And even if a refrigerant | coolant leaks, when the density | concentration of the refrigerant | coolant in an air-conditioned space does not reach a limit density | concentration, there is no possibility of the above accident. On the contrary, if the refrigerant leaks and the refrigerant concentration in the air-conditioned space reaches the limit concentration, the above accident may occur. For this reason, the volume of the air-conditioned space is increased or the amount of refrigerant charged in the refrigerant circuit is reduced so that the limit concentration is not reached, or Japanese Patent Application Laid-Open No. 2001-74283 discloses. As shown, it is necessary to take safety measures such as installing a refrigerant detection device, a ventilation device, a refrigerant cutoff device, and an alarm device so as not to reach the limit concentration.

  Here, when the refrigerant leaks, whether or not the refrigerant concentration in the air-conditioned space may reach the limit concentration is determined by the designer who creates the construction drawing of the refrigeration air-conditioning system or the refrigeration at the site. The contractor who constructs the air conditioner (hereinafter referred to as the “constructor side”) will do it.

  However, it is necessary to determine whether the concentration of the refrigerant in the air-conditioned space may reach the limit concentration when the refrigerant leaks as described above, and based on the determination result. It is not easy to confirm whether or not safety measures have been taken locally. That is, in the refrigeration air conditioner that has been completed, whether or not this refrigeration air conditioner has determined that there is no risk that the refrigerant concentration in the air-conditioned space will reach the limit concentration when the refrigerant leaks, Or, it is not easy to confirm after the construction of the refrigeration air conditioner whether or not it has been judged whether or not the refrigerant concentration in the air-conditioned space may reach the limit concentration. is there.

  On the other hand, when the refrigerant leaks, it is determined whether the refrigerant concentration in the air-conditioned space may reach the limit concentration, and the necessary safety measures are taken locally based on the determination result. In order to ensure that the rules of application are observed, the volume of the air-conditioned space, the amount of refrigerant filled in the refrigerant circuit, the concentration of the refrigerant in the air-conditioned space when the refrigerant leaks, the necessity of safety measures, the safety implemented There is a method of providing legal force by making it a legal obligation to list the contents of measures and report them to public institutions. There are also ways to impose legal penalties if you do not follow the rules.

  However, such legal regulations can achieve a certain effect, but on the other hand, a lot of man-hours are required for notification to public institutions, and it takes time to formulate legal regulations. There is a problem. In addition, once legal regulations are formulated, changes that respond to such changes in the times and technological advances can be quickly implemented even if the past regulations become obsolete due to changes in the times or technological advances. There is also a problem that can not be done.

  For this reason, if possible, the refrigeration air conditioner itself should be provided with a mechanism for complying with the rules for refrigerant leakage without relying on legal regulations. It is preferable to ensure that the rules for leakage are observed.

  An object of the present invention is to provide a refrigerating and air-conditioning apparatus having a refrigerant circuit in which the refrigerant circulates and a control device that controls the operation of the equipment constituting the refrigerant circuit, and the refrigerant concentration in the air-conditioned space is reduced when the refrigerant leaks during construction. It is to determine whether or not there is a possibility of reaching the limit concentration, and to ensure safety against refrigerant leakage based on the determination result.

  A refrigerating and air-conditioning apparatus according to a first aspect includes a refrigerant circuit in which a refrigerant circulates and a control device that performs operation control of devices that constitute the refrigerant circuit. And here, it is not after the judgment result at the time of construction whether or not it exceeds the safety countermeasure threshold value that needs to take safety measures against the leakage of refrigerant is inputted to the control device at the time of construction of the refrigeration air conditioner, or construction Unless the construction judgment information necessary for obtaining the judgment result is input to the control device during construction of the refrigeration air conditioner and the construction judgment result is obtained in the control device, the operation including the trial operation of the refrigerant circuit is performed. I can't do it.

  Here, at the time of construction of the refrigerating and air-conditioning apparatus, the contractor side can be surely determined whether or not it is necessary to take safety measures against refrigerant leakage, and safety measures can be taken based on the judgment results. If necessary, they can be encouraged to take the necessary safety measures appropriately.

  As a result, the contractor is not required to rely on legal regulations that may not be able to respond to changes in the times and technological advances that are fixed and to the public institutions that require a lot of man-hours. The rules for refrigerant leakage can be voluntarily obeyed. As a result, the safety of the refrigerating and air-conditioning apparatus can be significantly improved, and a safety mechanism against refrigerant leakage that is easily accepted by the market can be realized.

In addition, here, the safety measure threshold value is a threshold value of the refrigerant filling rate obtained by dividing the amount of refrigerant charged in the refrigerant circuit by the indoor volume of the air-conditioned space to be air-conditioned, and the judgment result at the time of construction is It is obtained by determining whether or not the refrigerant filling rate exceeds the safety measure threshold.

Here, the refrigerant filling rate that correlates with the refrigerant concentration in the air-conditioned space is adopted as a criterion for judging the necessity of safety measures, so that the refrigerant concentration in the air-conditioned space is reduced when the refrigerant leaks. It is possible to appropriately determine whether or not there is a risk of reaching the limit concentration.

  The refrigerating and air-conditioning apparatus according to the second aspect is the refrigerating and air-conditioning apparatus according to the first aspect, wherein the construction time determination result is stored in the control device and can be output after the construction of the refrigerating and air-conditioning apparatus.

  Here, in the event of an accident due to refrigerant leakage, it is possible to confirm whether or not an appropriate judgment has been made regarding refrigerant leakage during construction, thereby clarifying the cause and responsibility of the accident due to refrigerant leakage. Can be.

The refrigerating and air-conditioning apparatus according to the third aspect is the refrigerating and air-conditioning apparatus according to the second aspect, wherein the construction time determination result is determined together with the date when the construction time determination result is input to the control apparatus, or the construction time determination in the control apparatus. Along with the date when the result is obtained, it is stored in the control device, and the date can be output together with the judgment result at the time of construction after the construction of the refrigeration air conditioner.

  Here, in the event of an accident due to refrigerant leakage, it is also possible to confirm the date on which the judgment on refrigerant leakage was made at the time of construction, thereby further clarifying the cause of the accident due to refrigerant leakage and where the responsibility lies. can do.

  The refrigeration air conditioner according to the fourth aspect is the refrigeration air conditioner according to the second or third aspect, wherein the refrigerant circuit is configured by connecting the outdoor unit and the indoor unit, The outdoor control part which controls the apparatus which comprises an outdoor unit, and the indoor control part which controls the apparatus which comprises an indoor unit are provided. And the judgment result at the time of construction is memorize | stored in both the outdoor control part and the indoor control part.

  In a refrigeration air conditioner configured by connecting an outdoor unit and an indoor unit, if an accident due to refrigerant leakage occurs, the indoor unit may be damaged, and the construction time judgment stored in the indoor control unit The result may disappear.

  On the other hand, here, the judgment result at the time of construction can be stored in the outdoor control unit as well, so that the judgment result at the time of construction can be reliably left, thereby clarifying the cause of the accident due to refrigerant leakage and the location of the responsibility. It can contribute to the conversion.

  The refrigeration air conditioner according to the fifth aspect is the refrigeration air conditioner according to the second or third aspect, wherein the refrigerant circuit is configured by connecting an outdoor unit and a plurality of indoor units. And the input of the construction time judgment result or construction time judgment information to the control device is performed corresponding to each indoor unit.

  In a refrigeration air conditioner configured by connecting an outdoor unit and a plurality of indoor units, the installation status such as the volume of the air-conditioned space differs for each indoor unit. Often, each indoor unit is different.

  On the other hand, in this case, is it necessary to take safety measures against refrigerant leakage for each indoor unit by making the input of the judgment result during construction and the judgment information during construction corresponding to each indoor unit? The determination of whether or not can be made reliably, and when a safety measure is necessary based on the determination result, it can be urged to appropriately take the required safety measure. In addition, in the event of an accident due to refrigerant leakage, it is possible to check for each indoor unit whether or not an appropriate judgment has been made regarding refrigerant leakage during construction. It can contribute to clarifying whereabouts.

  A refrigeration air conditioner according to a sixth aspect is the refrigeration air conditioner according to the second or third aspect, wherein the refrigerant circuit is configured by connecting an outdoor unit and a plurality of indoor units, The indoor units are grouped for each air-conditioned space. And the input of the construction time judgment result or construction time judgment information to the control device is performed corresponding to each group set by grouping.

  In a refrigeration air conditioner configured by connecting an outdoor unit and a plurality of indoor units and grouping the indoor units for each air-conditioned space, installation of the volume of the air-conditioned space for each group of indoor units Since the situation is different, the judgment result at the time of construction and the judgment information at the time of construction are often different for each group of indoor units.

  On the other hand, here, safety measures against refrigerant leakage are taken for each group of indoor units by allowing the input of the judgment results during construction and the judgment information during construction to be performed corresponding to each group of indoor units. It is possible to reliably determine whether or not it is necessary, and when a safety measure is necessary based on the determination result, it is possible to prompt the user to appropriately take the necessary safety measure. In addition, when an accident due to refrigerant leakage occurs, it is possible to confirm for each group of indoor units whether or not an appropriate judgment has been made regarding refrigerant leakage during construction. It can contribute to the clarification of responsibility.

The refrigerating and air-conditioning apparatus according to the seventh aspect is the refrigerating and air-conditioning apparatus according to the fifth or sixth aspect, wherein the control device is an outdoor control unit that controls equipment that constitutes the outdoor unit, and equipment that constitutes each indoor unit. And an indoor control unit for controlling. The judgment result at the time of construction of each indoor unit is stored in the corresponding indoor control unit, and the outdoor control unit and / or other indoor control unit and / or the devices constituting the plurality of indoor units are collected. In the case of having a central control unit to control, it is also stored in the central control unit.

  In an refrigeration and air-conditioning system configured by connecting an outdoor unit and a plurality of indoor units, if an accident due to refrigerant leakage occurs, the indoor unit may be damaged, and the indoor unit damaged by the accident There is a possibility that the judgment result at the time of construction stored in the indoor control unit corresponding to will disappear.

  On the other hand, here, the judgment result at the time of construction of each indoor unit is also stored in the outdoor control unit and / or other indoor control unit and / or centralized control unit, so that The judgment result at the time of construction can be reliably left, and this can contribute to the clarification of the cause of the accident due to the leakage of the refrigerant and the location of the responsibility.

  The refrigeration air conditioner according to the eighth aspect is the refrigeration air conditioner according to any of the second to seventh aspects, wherein the construction judgment result can be erased after being stored in the control device. And when the construction time judgment result is deleted, it is not after the construction time judgment result is inputted again to the control device, or construction time judgment information is inputted again to the control device and the construction time in the control device. The operation including the trial operation of the refrigerant circuit is not performed unless the determination result is obtained again.

  The refrigeration air conditioner may be changed in terms of use conditions due to maintenance, modification, or relocation after construction. In this case, before restarting the operation of the refrigerant circuit, it is necessary to determine again whether it is necessary to take safety measures against the leakage of the refrigerant. However, before the maintenance, remodeling, or relocation, the refrigeration and air conditioning apparatus in which the construction judgment result is input or the construction judgment result is obtained is already capable of operating the refrigerant circuit. It becomes possible to restart the operation of the refrigerant circuit without re-determining whether it is necessary to take safety measures against leakage of the refrigerant, and there is a risk that safety against refrigerant leakage may not be ensured.

  Therefore, here, as described above, the construction time judgment result stored in the control device can be deleted, and when the construction time judgment result is erased, the construction time judgment result is input to the control device again. The operation including the trial operation of the refrigerant circuit should not be performed until after the construction is completed or after the construction time judgment information is input again to the control device and the construction time judgment result is obtained again in the control device. ing. Here, it is set so that the judgment result at the time of construction stored in the control device is automatically executed when the refrigeration air conditioner is de-energized due to, for example, maintenance, modification, or relocation. Can be considered.

  In this way, after maintenance, remodeling, relocation, or remodeling of the building where the refrigeration air conditioner is installed, the operation of the refrigerant circuit is performed in the same manner as when the refrigeration air conditioner is installed. Before performing the above, it is possible to reliably determine whether or not a safety measure is necessary for the leakage of the refrigerant.

  The refrigerating and air-conditioning apparatus according to the ninth aspect is the refrigerating and air-conditioning apparatus according to any of the second to eighth aspects, wherein the construction time determination result is stored in the control device and then overwritten with another construction time determination result. And can be memorized.

  After construction of the refrigerating and air-conditioning apparatus, there is a case where it is desired to correct the judgment result at the time of construction stored in the control apparatus due to some mistake or a slight change in usage conditions after construction. In such a case, it is inconvenient that the construction judgment result cannot be corrected. Also, if this correction does not affect the judgment of the necessity of safety measures against refrigerant leakage, unlike the construction of the refrigeration air conditioner, the necessity of safety measures against refrigerant leakage, etc. It is preferable that the refrigerant circuit can be continuously operated without making the determination again.

  Therefore, here, as described above, another construction time determination result can be overwritten and stored on the construction time determination result stored in the control device.

  Thereby, after construction of a refrigerating and air-conditioning apparatus, the judgment result at the time of construction can be suitably corrected while continuing operation of the refrigerant circuit.

The refrigerating and air-conditioning apparatus according to the tenth aspect is the refrigerating and air-conditioning apparatus according to any one of the first to ninth aspects, wherein the control device determines that the judgment result during construction needs to take a safety measure against refrigerant leakage In the case of the result, the operation including the test operation of the refrigerant circuit cannot be performed until the refrigeration air conditioner is provided with a safety measure against the leakage of the refrigerant.

  Here, when the judgment result at the time of construction needs to take safety measures against the leakage of refrigerant, it is possible to prevent the operation including the trial operation from being performed without taking the safety measures. It can be ensured that it is applied.

A refrigeration air conditioner according to an eleventh aspect is the refrigeration air conditioner according to any one of the first to tenth aspects, wherein the refrigerant has nonflammability, or slightly flammability or strong flammability, or is toxic. Have.

  If the refrigerant leaks and the concentration of the refrigerant in the air-conditioned space reaches the limit concentration, an ignition accident occurs when the refrigerant is a low-flammability or strong-flammability refrigerant, and poisoning occurs when the refrigerant is toxic. If the accident is an incombustible refrigerant, an accident due to lack of oxygen or abnormal heart rate may occur.

  However, here, as described above, at the time of construction of the refrigerating and air-conditioning apparatus, the construction side surely determines whether it is necessary to take a safety measure against the leakage of the refrigerant, and the judgment result is When safety measures are required based on this, we are urged to take the necessary safety measures appropriately, so operations including trial operation can be performed with safety measures against refrigerant leakage. Thereby, it is possible to reliably suppress the occurrence of ignition accidents, poisoning accidents due to refrigerant leakage, accidents due to lack of oxygen, abnormal heartbeats, and the like.

As described in the above description, according to the present invention, when the refrigeration air conditioner is constructed, it is possible to reliably determine whether or not it is necessary to take a safety measure against the leakage of the refrigerant on the construction side. And when a safety measure is required based on the judgment result, it can be urged to appropriately take the required safety measure. As a result, the contractor is not required to rely on legal regulations that may not be able to respond to changes in the times and technological advances that are fixed and to the public institutions that require a lot of man-hours. The rules for refrigerant leakage can be voluntarily obeyed. As a result, the safety of the refrigerating and air-conditioning apparatus can be significantly improved, and a safety mechanism against refrigerant leakage that is easily accepted by the market can be realized. In addition, here, by adopting a refrigerant filling rate that correlates with the concentration of the refrigerant in the air-conditioned space as a criterion for judging whether or not safety measures are necessary, when the refrigerant leaks, It is possible to appropriately determine whether or not the concentration may reach the limit concentration.

1 is an overall configuration diagram of a refrigeration air conditioner according to a first embodiment of the present invention. It is a control block diagram of the refrigeration air conditioner in 1st Embodiment. It is a figure which shows the limit density | concentration of various refrigerant | coolants, and a safety measure threshold value. It is a flowchart which shows the judgment process for ensuring the safety | security with respect to the leakage of the refrigerant | coolant at the time of construction. 12 is a flowchart showing a determination process for ensuring safety against refrigerant leakage during construction of Modification 1. BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram (state which installed the safety countermeasure apparatus) of the refrigerating air conditioner concerning 1st Embodiment of this invention. It is a control block diagram (state which installed the safety countermeasure apparatus) of the refrigerating air conditioner in the modification 2 of 1st Embodiment. 10 is a flowchart showing a determination process for ensuring safety against refrigerant leakage during construction of Modification 2; It is a control block diagram of the refrigeration air conditioner in the modification 3 of 1st Embodiment. It is a whole block diagram of the refrigeration air conditioner concerning 2nd Embodiment of this invention. It is a control block diagram of the refrigeration air conditioner in 2nd Embodiment. It is a whole block diagram (state which installed the safety countermeasure apparatus) of the refrigerating air conditioner concerning 2nd Embodiment of this invention. It is a control block diagram (state which installed the safety countermeasure apparatus) of the refrigerating and air-conditioning apparatus in the modification 2 of 2nd Embodiment. It is a control block diagram of the refrigeration air conditioner in the modification 3 of 2nd Embodiment. It is a control block diagram of the refrigeration air conditioner in the modification 4 of 2nd Embodiment. It is a control block diagram of the refrigeration air conditioner in the modification 6 of 2nd Embodiment. It is a flowchart which shows the overwrite process and reset process of a judgment result at the time of construction.

  Hereinafter, an embodiment of a refrigeration air conditioner according to the present invention will be described based on the drawings. In addition, the specific structure of embodiment of the refrigerating air conditioner concerning this invention is not restricted to the following embodiment and its modification, It can change in the range which does not deviate from the summary of invention.

-First embodiment-
(1) Configuration <Overall>
FIG. 1 is an overall configuration diagram of a refrigerating and air-conditioning apparatus 1 according to a first embodiment of the present invention. FIG. 2 is a control block diagram of the refrigeration air conditioner 1 according to the first embodiment.

  The refrigerating and air-conditioning apparatus 1 is an apparatus that cools or heats an air-conditioned space, and includes a refrigerant circuit 10 in which a refrigerant circulates and a control device 6 that performs operation control of devices and the like that constitute the refrigerant circuit 10. Yes. Here, the refrigerating and air-conditioning apparatus 1 is configured by connecting an outdoor unit 2 and an indoor unit 3.

  The outdoor unit 2 is installed outside the air-conditioned space such as outdoors, and the indoor unit 3 is installed on the wall or ceiling of the air-conditioned space. The refrigerant circuit 10 is configured by connecting the outdoor unit 2 and the indoor unit 3 via refrigerant communication tubes 4 and 5. The refrigerant circuit 10 is filled with a refrigerant having a slight flammability such as R32 or a refrigerant having a strong flammability such as R290.

  The control device 6 is configured by connecting an outdoor control unit 7 that controls equipment constituting the outdoor unit 2 and an indoor control unit 8 that controls equipment constituting the indoor unit 3 via a transmission line. ing. The outdoor control unit 7 is provided in the outdoor unit 2. The indoor control unit 8 is provided in the indoor unit 3, and when a remote control is provided corresponding to the indoor unit 3, the remote control is also included in the indoor control unit 8. Here, a transmission format in which the controllers 7 and 8 are connected via a transmission line is adopted, but the present invention is not limited to this, and other transmission formats such as wireless connection may be used. Good.

<Outdoor unit>
As described above, the outdoor unit 2 is connected to the indoor unit 3 via the refrigerant communication tubes 4 and 5, and constitutes a part of the refrigerant circuit 10.

  The outdoor unit 2 mainly includes a compressor 21, a switching mechanism 23, an outdoor heat exchanger 24, and an expansion mechanism 25.

  The compressor 21 is a mechanism for compressing a refrigerant, and here, a rotary type or scroll type volumetric compression element (not shown) accommodated in a casing (not shown) is also provided in the casing. A hermetic compressor driven by a stored compressor motor 22 is employed.

  The switching mechanism 23 is a four-way switching valve capable of switching between a cooling operation state in which the outdoor heat exchanger 24 functions as a refrigerant radiator and a heating operation state in which the outdoor heat exchanger 24 functions as a refrigerant evaporator. Here, the cooling operation state is a switching state in which the discharge side of the compressor 21 and the gas side of the outdoor heat exchanger 24 are communicated, and the gas refrigerant communication pipe 5 and the suction side of the compressor 21 are communicated ( (See the solid line of the switching mechanism 23 in FIG. 1). The heating operation state is a switching state in which the discharge side of the compressor 21 and the gas refrigerant communication pipe 5 are communicated with each other and the gas side of the outdoor heat exchanger 24 and the suction side of the compressor 21 are communicated (the switching in FIG. 1). (See dashed line for mechanism 23). The switching mechanism 23 is not limited to a four-way switching valve, and is configured to have a function of switching the flow direction of the refrigerant as described above, for example, by combining a plurality of electromagnetic valves. There may be.

  The outdoor heat exchanger 24 is a heat exchanger that functions as a refrigerant radiator or evaporator by exchanging heat between the refrigerant and outdoor air. The outdoor air that exchanges heat with the refrigerant in the outdoor heat exchanger 24 is supplied to the outdoor heat exchanger 24 by an outdoor fan 26 driven by an outdoor fan motor 27.

  The expansion mechanism 25 is an electric expansion valve capable of changing the flow rate of the refrigerant circulating in the refrigerant circuit 10 while reducing the refrigerant pressure by controlling the opening degree.

<Indoor unit>
As described above, the indoor unit 3 is connected to the outdoor unit 2 via the refrigerant communication tubes 4 and 5 and constitutes a part of the refrigerant circuit 10.

  The indoor unit 3 mainly has an indoor heat exchanger 32.

  The indoor heat exchanger 32 is a heat exchanger that functions as an evaporator or a radiator of the refrigerant by exchanging heat between the refrigerant and the air in the air-conditioned space (indoor air). The indoor air that exchanges heat with the refrigerant in the indoor heat exchanger 32 is supplied to the indoor heat exchanger 32 by an indoor fan 33 driven by an indoor fan motor 34.

<Control device (basic configuration only)>
The control device 6 is configured by connecting the outdoor control unit 7 and the indoor control unit 8 as described above.

  The outdoor control unit 7 controls the operation of the outdoor unit 2 and constitutes a part of the control device 6. The outdoor control unit 7 mainly includes an outdoor CPU 71, an outdoor transmission unit 72, and an outdoor storage unit 73.

  The outdoor CPU 71 is connected to the outdoor transmission unit 72, the outdoor storage unit 73, the outdoor operation unit 74, and the outdoor display unit 75. The outdoor transmission unit 72 transmits control data and the like to and from the indoor control unit 8. The outdoor storage unit 73 stores control data and the like. And outdoor CPU71 transmits control data etc. via the outdoor transmission part 72, reads / writes control data etc. to the outdoor memory | storage part 73, and equipments 21, 23, such as a compressor provided in the outdoor unit 2, Operation control of 25 and 26 is performed.

  The indoor control unit 8 controls the operation of the indoor unit 3 and constitutes a part of the control device 6. The indoor control unit 8 mainly includes an indoor CPU 81, an indoor transmission unit 82, an indoor storage unit 83, an indoor operation unit 84, and an indoor display unit 85.

  The indoor CPU 81 is connected to the indoor transmission unit 82, the indoor storage unit 83, the indoor operation unit 84, and the indoor display unit 85. The indoor transmission unit 82 transmits control data and the like to and from the outdoor control unit 7. The indoor storage unit 83 stores control data and the like. The indoor operation unit 84 inputs a control command and the like. The indoor display unit 85 displays (outputs) the operation state and the like. The indoor CPU 81 receives an input of a control command or the like via the indoor transmission unit 82 or the indoor operation unit 84, transmits control data or the like, reads / writes control data or the like to / from the indoor storage unit 83, and displays the indoor display unit. While displaying the operation state in 85, the operation control of the equipment 33 such as an indoor fan provided in the indoor unit 3 is performed. In addition, when a remote control is provided corresponding to the indoor unit 3, this remote control also comprises each part 82-85 of the indoor control part 8. FIG.

(2) Basic operation In the refrigerating and air-conditioning apparatus 1, the following basic operation is performed by the above basic configuration.

<Cooling operation>
First, the cooling operation will be described. When an instruction for cooling operation is given from the control device 6 to the refrigerating and air-conditioning apparatus 1 via the indoor operation unit 84 of the indoor control unit 8, the switching mechanism 23 is in the cooling operation state (indicated by the solid line of the switching mechanism 23 in FIG. 1). The compressor 21, the outdoor fan 26, and the indoor fan 33 are activated. Then, the refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 24 via the switching mechanism 23. The refrigerant sent to the outdoor heat exchanger 24 is condensed by cooling with the outdoor air supplied by the outdoor fan 26 in the outdoor heat exchanger 24 functioning as a refrigerant radiator. This refrigerant is sent to the expansion mechanism 25. The refrigerant sent to the expansion mechanism 25 is depressurized by the expansion mechanism 25 and sent from the outdoor unit 2 to the indoor unit 3 via the liquid refrigerant communication tube 4. The refrigerant sent to the indoor unit 3 is sent to the indoor heat exchanger 32. The refrigerant sent to the indoor heat exchanger 32 is heated by exchanging heat with indoor air supplied from the air-conditioned space by the indoor fan 33 in the indoor heat exchanger 32 functioning as an evaporator of the refrigerant. Evaporate. This refrigerant is sent from the indoor unit 3 to the outdoor unit 2 via the gas refrigerant communication pipe 5. On the other hand, the indoor air cooled in the indoor heat exchanger 32 is sent to the air-conditioned space, thereby cooling the air-conditioned space. The refrigerant sent to the outdoor unit 2 is sucked into the compressor 21 via the switching mechanism 23.

<Heating operation>
Next, the heating operation will be described. When an instruction for heating operation is given from the control device 6 to the refrigerating and air-conditioning apparatus 1 via the indoor operation unit 84 or the like of the indoor control unit 8, the switching mechanism 23 is in the heating operation state (indicated by the broken line of the switching mechanism 23 in FIG. 1). The compressor 21, the outdoor fan 26, and the indoor fan 33 are activated. Then, the refrigerant discharged from the compressor 21 is sent from the outdoor unit 2 to the indoor unit 3 via the switching mechanism 23 and the gas refrigerant communication pipe 5. The refrigerant sent to the indoor unit 3 is sent to the indoor heat exchanger 32. The refrigerant sent to the indoor heat exchanger 32 is cooled by exchanging heat with indoor air supplied from the air-conditioned space by the indoor fan 33 in the indoor heat exchanger 32 functioning as a refrigerant radiator. Condensate. This refrigerant is sent from the indoor unit 3 to the outdoor unit 2 via the liquid refrigerant communication tube 4. On the other hand, the indoor air heated in the indoor heat exchanger 32 is sent to the air-conditioned space, thereby heating the air-conditioned space. The refrigerant sent to the outdoor unit 2 is sent to the expansion mechanism 25. The refrigerant sent to the expansion mechanism 25 is decompressed by the expansion mechanism 25 and sent to the outdoor heat exchanger 24. The refrigerant sent to the outdoor heat exchanger 24 evaporates by being heated by exchanging heat with outdoor air supplied by the outdoor fan 26 in the outdoor heat exchanger 24 functioning as a refrigerant evaporator. This refrigerant is sucked into the compressor 21 via the switching mechanism 23.

(3) Judgment processing for ensuring safety against leakage of refrigerant at the time of construction In a refrigeration air conditioner having a refrigerant circuit in which refrigerant circulates, if the refrigerant leaks and the concentration of the refrigerant in the air-conditioned space increases, slightly flammability In the case of a refrigerant having strong flammability, an ignition accident may occur, in the case of a toxic refrigerant, an poisoning accident may occur, and in the case of a non-flammable refrigerant, an accident due to lack of oxygen or abnormal heart rate may occur. . As an index for such an accident, as shown in FIG. 3, a limit concentration is defined for each refrigerant.

  Here, the refrigerant circuit 10 of the refrigerating and air-conditioning apparatus 1 is filled with a refrigerant having a slight flammability or a strong flammability, but the refrigerant filling amount M filled in the refrigerant circuit 10 is an air-conditioned space to be air-conditioned. When the refrigerant filling rate C (= M / V) obtained by dividing by the indoor volume V of the refrigerant does not exceed RCLm in FIG. Even if the leakage occurs, the concentration of the refrigerant in the air-conditioned space does not reach the limit concentration, so there is no possibility of an ignition accident. Conversely, when the refrigerant filling rate C exceeds the safety measure threshold value RCLm, there is a possibility that an ignition accident may occur because the refrigerant concentration in the air-conditioned space may reach the limit concentration if the refrigerant leaks.

  For this reason, in the construction of the refrigerating and air-conditioning apparatus 1, the refrigeration air-conditioning apparatus 1 builder determines whether or not the safety countermeasure threshold value RCLm that requires safety measures against refrigerant leakage is exceeded, and Based on the determination result, the refrigerant filling rate C is prevented from exceeding the safety measure threshold RCLm by increasing the indoor volume V of the air-conditioned space or reducing the refrigerant filling amount M filled in the refrigerant circuit 10. Alternatively, it is necessary to take safety measures such that the refrigerant filling rate C does not exceed the safety measure threshold RCLm by installing a refrigerant detection device, a ventilation device, a refrigerant shut-off device, and an alarm device.

  However, when the refrigerant leaks, it is determined whether or not the safety countermeasure threshold value RCLm that needs to be taken with respect to the refrigerant leakage is exceeded (here, whether or not the refrigerant filling rate C exceeds the safety countermeasure threshold value RCLm). It is not easy to confirm afterwards whether or not the safety measures have been taken and whether necessary safety measures have been taken on the basis of the judgment results. That is, in the refrigeration air conditioner 1 (see FIG. 1) that has been completed, a result is obtained in which it is determined that the refrigeration air conditioner 1 does not exceed the safety measure threshold value RCLm that requires safety measures against refrigerant leakage. Confirming after the construction of the refrigerating and air-conditioning apparatus 1 whether or not it has been determined whether or not the safety measure threshold RCLm that needs to be taken with respect to the leakage of the refrigerant is not exceeded. It is not easy.

  On the other hand, whether or not the concentration of the refrigerant in the air-conditioned space may reach the limit concentration when the refrigerant leaks (in this case, the safety countermeasure threshold RCLm that needs to be taken with respect to the leakage of the refrigerant is exceeded) Refrigeration and air-conditioning equipment without relying on legal regulations to comply with the rule that the necessary safety measures are taken locally based on the judgment results. It is preferable that a rule for refrigerant leakage is provided in 1 itself so that the rules for refrigerant leakage are voluntarily obeyed by the contractor.

  Therefore, here, as a determination process for ensuring safety against refrigerant leakage at the time of construction, it is determined whether or not a safety countermeasure threshold value RCLm that requires safety measures against refrigerant leakage is exceeded (here, with respect to refrigerant leakage). The operation including the trial operation of the refrigerant circuit 10 is not performed unless the result of judgment at the time of construction (whether or not the safety countermeasure threshold RCLm that needs to be taken) is inputted to the control device 6 at the time of construction of the refrigeration air conditioner 1. The process is made so that it cannot be performed.

  In the control device 6, as shown in FIG. 2, a determination result processing unit 86 is further provided in the indoor CPU 81 of the indoor control unit 8, and the control device 6 including the determination result processing unit 86 allows the control device 6 of FIG. A determination process as shown in the flowchart is performed.

  Whether or not the determination result processing unit 86 exceeds the safety measure threshold RCLm that needs to take safety measures against refrigerant leakage at the time of construction of the refrigeration air conditioner 1 (before the operation including the test operation of the refrigerant circuit 10) in step ST1. (In this case, whether or not the refrigerant filling rate C exceeds the safety measure threshold RCLm). Here, the judgment result at the time of construction is that the refrigerant filling rate is obtained by dividing the refrigerant filling amount M filled in the refrigerant circuit 10 of the refrigeration air-conditioning apparatus 1 by the indoor volume V of the air-conditioned space to be air-conditioned on the construction side. This is a result obtained by obtaining C and determining whether or not the refrigerant filling rate C exceeds the safety measure threshold value RCLm in FIG. And the judgment result at the time of construction obtained on this side of the installer means that the refrigerant filling rate C does not exceed the safety measure threshold RCLm, or the refrigerant filling rate C exceeds the safety measure threshold RCLm. The value to be input is input to the control device 6 via the indoor operation unit 84 and received by the determination result processing unit 86.

  Next, in step ST2, the judgment result processing unit 86 judges whether or not the accepted construction time judgment result is safe against refrigerant leakage. In this step ST2, when the construction result judgment result received by the judgment result processing unit 86 does not exceed the safety measure threshold value RCLm, the judgment result processing unit 86 judges that it is safe against leakage of the refrigerant, The process proceeds to step ST3. Then, the determination result processing unit 86 allows the operation including the trial operation of the refrigerant circuit 10 to be performed in step ST4 after storing the accepted construction time determination result in the indoor storage unit 83 of the control device 6 in step ST3. The indoor storage unit 83 also stores the date when the construction time determination result is input to the control device 6 together with the construction time determination result. Here, the date memorize | stored in the indoor memory | storage part 83 may be input into the control apparatus 6 via the indoor operation part 84 with the determination result at the time of construction, and when the control apparatus 6 has a calendar function Alternatively, the date indicated by the calendar function when the construction determination result is input to the control device 6 may be used. The construction time determination result and the date stored in the indoor storage unit 83 can be output after the construction of the refrigerating and air-conditioning apparatus 1 via the indoor operation unit 84 and the indoor display unit 85, for example.

  On the other hand, when the construction time determination result received by the determination result processing unit 86 exceeds the safety measure threshold value RCLm in step ST2, the determination result processing unit 86 determines that it is not safe against refrigerant leakage, The process returns to the process of step ST1 without shifting to the process of steps ST3 and ST4 (that is, without permitting the operation including the trial operation of the refrigerant circuit 10). At this time, it is preferable to display a warning message indicating that it is not safe against leakage of the refrigerant on the indoor display unit 85 or the like. Then, until a safety measure against refrigerant leakage is taken on the contractor side, for example, the refrigerant volume is filled by increasing the indoor volume V of the air-conditioned space or reducing the refrigerant charge amount M charged in the refrigerant circuit 10. The rate C does not exceed the safety measure threshold value RCLm, and in step ST1, a construction judgment result that the refrigerant filling rate C does not exceed the safety measure threshold value RCLm is accepted, and in step ST2, it is safe against refrigerant leakage. Until it is determined, the operation including the trial operation of the refrigerant circuit 10 is prohibited.

  In this way, at the time of construction of the refrigeration air conditioner 1, it is possible to reliably determine whether or not it is necessary to take a safety measure against the leakage of the refrigerant on the construction side, If safety measures are required based on this, it can be urged to take the necessary safety measures appropriately. As a result, the contractor is not required to rely on legal regulations that may not be able to respond to changes in the times and technological advances that are fixed and to the public institutions that require a lot of man-hours. The rules for refrigerant leakage can be voluntarily obeyed. As a result, the safety of the refrigerating and air-conditioning apparatus 1 can be greatly improved, and a safety mechanism against refrigerant leakage that is easily accepted by the market can be realized.

  In addition, here, in the event of an accident due to refrigerant leakage, it is possible to confirm whether or not an appropriate judgment has been made regarding refrigerant leakage during construction. Can be clarified. In addition, here, in the event of an accident due to refrigerant leakage, it is also possible to confirm the date on which the judgment on refrigerant leakage was made at the time of construction, thereby further increasing the cause of the accident due to refrigerant leakage and the location of responsibility. Can be clear.

  In addition, here, the refrigerant filling rate C that correlates with the refrigerant concentration in the air-conditioned space is adopted as a judgment criterion for judging whether or not safety measures are necessary, so that when the refrigerant leaks, the refrigerant in the air-conditioned space It is possible to appropriately determine whether or not there is a possibility that the concentration of the solution will reach the limit concentration.

  In addition, here, when the judgment result at the time of construction needs to take safety measures against the leakage of refrigerant, it is possible to prevent the operation including the trial run from being performed without taking the safety measures. It is possible to ensure that measures are taken.

  In addition, here, there is a concern of ignition accidents because a refrigerant having a slight flammability or a strong flammability is used. Make sure that safety measures need to be taken and, if necessary, based on the results of the decision, encourage them to take the necessary safety measures appropriately. Therefore, it is possible to perform an operation including a trial operation in a state where safety measures against the refrigerant leakage are taken, and thereby it is possible to reliably suppress the occurrence of an ignition accident due to the refrigerant leakage.

  In addition, there is a risk of poisoning when using a toxic refrigerant instead of a slightly flammable or strong flammable refrigerant, and when using a non-flammable refrigerant, lack of oxygen, abnormal heart rate, etc. However, by performing the above-described determination process, it is possible to reliably suppress the occurrence of an accident due to poisoning due to refrigerant leakage, an oxygen deficiency, an abnormal heart rate, or the like.

(4) Modification 1
In the above-described embodiment, as a determination process for ensuring safety against refrigerant leakage at the time of construction, it is determined whether or not a safety countermeasure threshold value RCLm that requires safety measures against refrigerant leakage is exceeded. If the judgment result at the time of construction of whether or not the safety countermeasure threshold value RCLm that needs to take safety measures against the leakage is not input to the control device 6 at the time of construction of the refrigeration air conditioner 1, the refrigerant circuit 10 is tested. Processing is performed so as to prevent operation including this (see FIG. 4).

  However, the present invention is not limited to this, and the construction time judgment information necessary for obtaining the construction time judgment result (that is, whether or not the safety countermeasure threshold value RCLm that requires safety measures against refrigerant leakage is exceeded) is obtained. A process for preventing operation including the trial operation of the refrigerant circuit 10 is performed unless it is input to the control device 6 at the time of construction of the refrigerating and air-conditioning apparatus 1 and a judgment result at the time of construction is obtained in the control device 6. May be.

  Specifically, a determination process as shown in the flowchart of FIG. 5 is performed in the determination result processing unit 86 of the control device 6.

  In step ST11, the determination result processing unit 86 is different from step ST1 of the above-described embodiment in order to obtain a determination result at the time of construction at the time of construction of the refrigeration air conditioner 1 (before operation including trial operation of the refrigerant circuit 10). Accept necessary construction time judgment information. Here, the construction determination information includes the refrigerant filling rate C calculated on the contractor side, the refrigerant filling amount M necessary for calculating the refrigerant filling rate C, the space volume V of the air-conditioned space, and the like. The construction time determination information is input to the control device 6 via the indoor operation unit 84 and received by the determination result processing unit 86.

  Next, in step ST12, the determination result processing unit 86 acquires a determination result at the time of construction. For example, when the refrigerant filling rate C is input to the control device 6 in step ST11, the determination result processing unit 86 determines whether or not the input refrigerant charging rate C exceeds the safety measure threshold value RCLm. To obtain the result of construction judgment. In Step ST11, when the refrigerant filling amount M and the space volume V are input to the control device 6, the determination result processing unit 86 divides the refrigerant filling amount M by the space volume V to obtain the refrigerant filling rate C. And the determination result at the time of construction is acquired by determining whether or not the calculated refrigerant filling rate C exceeds the safety measure threshold value RCLm. Here, the safety measure threshold value RCLm may be input as construction determination information, or may be prepared by being stored in the outdoor storage unit 73 or the indoor storage unit 83.

  Next, similarly to the above embodiment, the determination result processing unit 86 determines whether or not the acquired construction time determination result is safe against refrigerant leakage in step ST2. In this step ST2, when the construction result judgment result acquired by the judgment result processing unit 86 does not exceed the safety measure threshold value RCLm, the judgment result processing unit 86 judges that it is safe against leakage of the refrigerant, The process proceeds to step ST3. Then, the determination result processing unit 86 allows the operation including the trial operation of the refrigerant circuit 10 to be performed in step ST4 after storing the acquired construction time determination result in the indoor storage unit 83 of the control device 6 in step ST3. The indoor storage unit 83 also stores the date when the construction time judgment information is input to the control device 6 and the construction time judgment result is obtained together with the construction time judgment result. Here, the date memorize | stored in the indoor memory | storage part 83 may be input into the control apparatus 6 via the indoor operation part 84 with the construction time judgment information, and when the control apparatus 6 has a calendar function May be the date indicated by the calendar function when the construction time judgment information is input and the construction time judgment result is obtained. The construction time determination result and the date stored in the indoor storage unit 83 can be output after the construction of the refrigerating and air-conditioning apparatus 1 via the indoor operation unit 84 and the indoor display unit 85, for example.

  On the other hand, when the construction result judgment result acquired by the judgment result processing unit 86 exceeds the safety measure threshold value RCLm in step ST2, the judgment result processing unit 86 responds to refrigerant leakage as in the above embodiment. It is determined that the process is not safe, and the process returns to step ST1 without shifting to the process of steps ST3 and ST4 (that is, without permitting the operation including the trial operation of the refrigerant circuit 10). At this time, it is preferable to display a warning message indicating that it is not safe against leakage of the refrigerant on the indoor display unit 85 or the like. Then, until a safety measure against refrigerant leakage is taken on the contractor side, for example, the refrigerant volume is filled by increasing the indoor volume V of the air-conditioned space or reducing the refrigerant charge amount M charged in the refrigerant circuit 10. The rate C does not exceed the safety measure threshold value RCLm, and in step ST11, construction time determination information capable of obtaining a construction time determination result in which the refrigerant filling rate C does not exceed the safety measure threshold value RCLm is input, and In step ST12, a construction determination result is obtained in which the refrigerant filling rate C does not exceed the safety measure threshold value RCLm, and the trial operation of the refrigerant circuit 10 is included until it is determined in step ST2 that it is safe against refrigerant leakage. Prevent operation.

(5) Modification 2
As a safety measure against the leakage of the refrigerant, the refrigerant filling rate C does not exceed the safety countermeasure threshold RCLm by increasing the indoor volume V of the air-conditioned space or reducing the refrigerant filling amount M filled in the refrigerant circuit 10. Most preferably.

  However, even if it is not possible to increase the indoor volume V of the air-conditioned space or reduce the refrigerant charge amount M charged in the refrigerant circuit 10, the refrigerant detection device, the ventilation device, the refrigerant shut-off device, and the alarm device May be installed as a safety measure device to take safety measures against refrigerant leakage.

  Therefore, here, in the determination process for ensuring the safety against the leakage of the refrigerant at the time of execution of the above embodiment and the modification 1 thereof, the determination result at the time of execution input to the control device 6 or acquired by the control device 6. Even if the judgment result during construction exceeds the safety measure threshold RCLm, safety measures against refrigerant leakage can be implemented by installing safety measure devices such as refrigerant detection devices, ventilation devices, refrigerant shut-off devices, and alarm devices. If so, a process for permitting the operation including the trial operation of the refrigerant circuit 10 is added.

  In the control device 6, as shown in FIG. 7, a safety measure receiving unit 87 is further provided in the indoor CPU 81 of the indoor control unit 8, and the control device includes the safety measure receiving unit 87 together with the determination result processing unit 86. 6, the determination process as shown in the flowchart of FIG. 8 is performed. Here, as shown in FIG. 6, it is assumed that the refrigerant detection device 11 is installed as a safety measure against refrigerant leakage. Further, in the following description, similar to the above-described embodiment, a description will be given on the assumption that the construction-time determination result is input to the control device 6 (that is, processing including step ST1). 1, even if it is a premise that the construction determination information is input to the control device 6 (that is, the process including steps ST11 and ST12), the same determination can be made by replacing the process of step ST1 with the process of steps ST11 and ST12. Processing can be performed.

  Similar to the above embodiment, the determination result processing unit 86 needs to take safety measures against refrigerant leakage at the time of construction of the refrigerating and air-conditioning apparatus 1 (before operation including trial operation of the refrigerant circuit 10) in step ST1. The judgment result at the time of construction whether or not the safety measure threshold value RCLm is exceeded (here, whether or not the refrigerant filling rate C exceeds the safety measure threshold value RCLm) is accepted.

  Next, similarly to the above embodiment, the determination result processing unit 86 determines whether or not the accepted determination result at the time of construction is safe against refrigerant leakage in step ST2. In this step ST2, when the construction result judgment result received by the judgment result processing unit 86 does not exceed the safety measure threshold value RCLm, the judgment result processing unit 86 judges that it is safe against leakage of the refrigerant, As in the above embodiment, the process proceeds to step ST3, and the determination result processing unit 86 stores the determination result during construction in the indoor storage unit 83 of the control device 6 in step ST3. In ST4, the operation including the trial operation of the refrigerant circuit 10 is permitted.

  On the other hand, when the construction-time determination result received by the determination result processing unit 86 exceeds the safety measure threshold value RCLm in step ST2, the determination result processing unit 86 responds to refrigerant leakage as in the above embodiment. Judge that it is not safe. However, here, unlike the above embodiment, the process proceeds to step ST21.

  Next, in step ST21, the safety measure receiving unit 87 determines whether or not a safety measure device for refrigerant leakage is installed. For example, when the safety measure device (refrigerant detection device 11 in FIG. 6) is installed on the construction side, the fact that the safety measure device is installed (safety measure installation information) means that. The value is input to the control device 6 via the indoor operation unit 84 and received by the safety measure receiving unit 87. Then, the judgment result processing unit 86 is constructed in step ST2 on the assumption that the safety measures are taken by installing the safety measure device based on the safety measure installation information received by the safety measure accepting portion 87. As in the case where it is determined that the time determination result is safe against the leakage of the refrigerant, the process proceeds to steps ST3 and ST4, and the execution time determination result is stored in the indoor storage unit 83 of the control device 6. Later, the operation including the trial operation of the refrigerant circuit 10 is permitted. Here, the control device 6 stores safety measure installation information together with the determination result at the time of construction and the like. Note that the method of inputting safety measure installation information is not limited to that input via the indoor operation unit 84. For example, as shown in FIG. And a signal from the refrigerant detection device 11 may be input to the control device 6 and transmitted to the safety measure receiving unit 87.

  On the other hand, in step ST21, when it is determined that the safety countermeasure device against refrigerant leakage (refrigerant detection device 11 in FIG. 6) is not installed, the determination result processing unit 86 is the same as in the above embodiment. In addition, it is determined that it is not safe against the leakage of the refrigerant, and the process of step ST1 is not performed without shifting to the process of steps ST3 and ST4 (that is, the operation including the trial operation of the refrigerant circuit 10 is not permitted). Return to. Then, on the contractor side, safety measures against refrigerant leakage including installation of safety measures are taken, and trial operation of the refrigerant circuit 10 is performed until it is determined in step ST2 that it is safe against refrigerant leakage. Do not allow driving that includes.

(6) Modification 3
In the above embodiment and its modifications 1 and 2, the refrigerating and air-conditioning apparatus 1 is configured by connecting the outdoor unit 2 and the indoor unit 3, so an accident due to refrigerant leakage (particularly an ignition accident). If this occurs, the indoor unit 3 may be damaged, and the construction determination result stored in the indoor control unit 8 (in this case, the indoor storage unit 83) may be lost.

  Therefore, here, the determination result at the time of construction is stored not only in the indoor control unit 8 but also in the outdoor control unit 7. That is, the construction judgment result and the like are transmitted from the indoor control unit 8 to the outdoor control unit 7 via the transmission units 72 and 82 and stored in the outdoor storage unit 73. Here, as shown in FIG. 9, an outdoor output unit 74 is provided in the outdoor control unit 7 so that it can be easily output after the construction of the refrigeration air conditioner 1.

  Thereby, the judgment result at the time of construction can be left reliably here, and it can contribute to clarification of the cause of the accident by the leakage of a refrigerant, and the location of responsibility.

-Second Embodiment-
(1) Configuration <Overall>
FIG. 10 is an overall configuration diagram of the refrigerating and air-conditioning apparatus 101 according to the second embodiment of the present invention. FIG. 11 is a control block diagram of the refrigerating and air-conditioning apparatus 101 in the second embodiment.

  The refrigerating and air-conditioning apparatus 101 is an apparatus that cools and heats the air-conditioned spaces S1 and S2, and includes a refrigerant circuit 110 in which the refrigerant circulates, and a control apparatus 106 that performs operation control of devices and the like constituting the refrigerant circuit 110. Have. Here, the refrigerating and air-conditioning apparatus 101 is an indoor multi-type refrigerating and air-conditioning apparatus configured by connecting the outdoor unit 2 and a plurality of (here, four) indoor units 3a, 3b, 3c, and 3d. .

  The outdoor unit 2 is installed outside the air-conditioned space such as outdoors, the indoor units 3a and 3b are installed on the wall or ceiling of the air-conditioned space S1, and the indoor units 3c and 3d are air-conditioned spaces. It is installed on the wall or ceiling of S2. The refrigerant circuit 110 is configured by connecting the outdoor unit 2 and the indoor units 3a, 3b, 3c, and 3d via refrigerant communication tubes 104 and 105. The refrigerant circuit 110 is filled with a refrigerant having a slight flammability such as R32 or a refrigerant having a strong flammability such as R290.

  The control device 106 includes an outdoor control unit 7 that controls the devices that constitute the outdoor unit 2, and indoor control units 8a, 8b, 8c, and 8d that control the devices that constitute the indoor units 3a, 3b, 3c, and 3d. It is configured by being connected via a transmission line. The outdoor control unit 7 is provided in the outdoor unit 2. The indoor control units 8a, 8b, 8c, and 8d are provided in the indoor units 3a, 3b, 3c, and 3d. When a remote controller is provided corresponding to the indoor units 3a, 3b, 3c, and 3d, the remote controller is provided. Are also included in the indoor control units 8a, 8b, 8c, and 8d. Here, a transmission format in which the controllers 7, 8a, 8b, 8c, and 8d are connected via a transmission line is adopted. However, the present invention is not limited to this, and other types such as wireless connection are used. It may be a transmission format.

<Outdoor unit>
As described above, the outdoor unit 2 is connected to the indoor units 3a, 3b, 3c, and 3d via the refrigerant communication tubes 104 and 105, and constitutes a part of the refrigerant circuit 110. In addition, since the structure of the outdoor unit 2 concerning this embodiment is the same as that of the outdoor unit 2 (refer FIG. 1) concerning said 1st Embodiment, description is abbreviate | omitted here.

<Indoor unit>
As described above, the indoor units 3a, 3b, 3c, and 3d are connected to the outdoor unit 2 via the refrigerant communication tubes 104 and 105, and constitute a part of the refrigerant circuit 110. In the following description, the configuration of the indoor unit 3a will be described, and the configuration of the indoor units 3b, 3c, 3d will be described by replacing the subscript “a” with “b”, “c”, “d”. Omitted.

  The indoor unit 3a mainly includes an expansion mechanism 31a and an indoor heat exchanger 32a.

  The indoor expansion mechanism 31a is an electric expansion valve that can change the flow rate of the refrigerant flowing through the indoor heat exchanger 32a by performing opening degree control.

  The indoor heat exchanger 32a is a heat exchanger that functions as an evaporator or a radiator of the refrigerant by exchanging heat between the refrigerant and room air. The indoor air that exchanges heat with the refrigerant in the indoor heat exchanger 32a is supplied to the indoor heat exchanger 32a by the indoor fan 33a driven by the indoor fan motor 34a.

<Control device (basic configuration only)>
As described above, the control device 106 is configured by connecting the outdoor control unit 7 and the indoor control units 8a, 8b, 8c, and 8d.

  The outdoor control unit 7 controls the operation of the outdoor unit 2 and constitutes a part of the control device 106. In addition, since the structure of the outdoor control part 7 concerning this embodiment is the same as that of the outdoor control part 7 (refer FIG. 2) concerning said 1st Embodiment, description is abbreviate | omitted here.

  The indoor control units 8a, 8b, 8c, and 8d control the operation of the corresponding indoor units 3a, 3b, 3c, and 3d, respectively, and constitute a part of the control device 106. The indoor control units 8a, 8b, 8c, and 8d mainly include indoor CPUs 81a, 81b, 81c, and 81d, indoor transmission units 82a, 82b, 82c, and 82d, and indoor storage units 83a, 83b, 83c, and 83d, respectively. It has indoor operation parts 84a, 84b, 84c, 84d and indoor display parts 85a, 85b, 85c, 85d. In the following description, the configuration of the indoor control unit 8a will be described. Regarding the configuration of the indoor control units 8b, 8c, and 8d, the subscript “a” is replaced with “b”, “c”, and “d”. Description is omitted.

  The indoor CPU 81a is connected to the indoor transmission unit 82a, the indoor storage unit 83a, the indoor operation unit 84a, and the indoor display unit 85a. The indoor transmission unit 82a transmits control data and the like between the outdoor control unit 7a and the other indoor transmission units 82b, 82c, and 82d. The indoor storage unit 83a stores control data and the like. The indoor operation unit 84a inputs a control command and the like. The indoor display unit 85a displays (outputs) the operation state and the like. The indoor CPU 81a receives an input of a control command or the like via the indoor transmission unit 82a or the indoor operation unit 84a, transmits control data or the like, reads / writes control data or the like from / to the indoor storage unit 83a, and displays the indoor display unit. While displaying the operation state in 85a, the operation control of the devices 31a and 33a corresponding to the expansion mechanism such as the indoor fan provided in the indoor unit 3a is performed. In addition, when a remote control is provided corresponding to the indoor unit 3a, this remote control also comprises each part 82a-85a of the indoor control part 8a.

(2) Basic operation In the refrigerating and air-conditioning apparatus 101, the following basic operation is performed by the above basic configuration.

<Cooling operation>
First, the cooling operation will be described. When an instruction for cooling operation is given from the control device 106 to the refrigerating and air-conditioning apparatus 101 via the indoor operation units 84a, 84b, 84c, 84d of the indoor control units 8a, 8b, 8c, 8d, the switching mechanism 23 is in the cooling operation state. The compressor 21, the outdoor fan 26, and the indoor fan 33 are activated by switching to the state indicated by the solid line of the switching mechanism 23 in FIG. Then, the refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 24 via the switching mechanism 23. The refrigerant sent to the outdoor heat exchanger 24 is condensed by cooling with the outdoor air supplied by the outdoor fan 26 in the outdoor heat exchanger 24 functioning as a refrigerant radiator. This refrigerant is sent from the outdoor unit 2 to the indoor units 3a, 3b, 3c, and 3d via the liquid refrigerant communication tube 104. The refrigerant sent to the indoor units 3a, 3b, 3c, 3d is sent to the expansion mechanisms 31a, 31b, 31c, 31d. The refrigerant sent to the expansion mechanisms 31a, 31b, 31c, 31d is depressurized in the expansion mechanisms 31a, 31b, 31c, 31d and sent to the indoor heat exchangers 32a, 32b, 32c, 32d. The refrigerant sent to the indoor heat exchangers 32a, 32b, 32c, and 32d is air-conditioned by the indoor fans 33a, 33b, 33c, and 33d in the indoor heat exchangers 32a, 32b, 32c, and 32d that function as refrigerant evaporators. It evaporates when heated by exchanging heat with room air supplied from the spaces S1 and S2. This refrigerant is sent from the indoor units 3a, 3b, 3c, and 3d to the outdoor unit 2 via the gas refrigerant communication pipe 105. On the other hand, the room air cooled in the indoor heat exchangers 32a, 32b, 32c, and 32d is sent to the air-conditioned spaces S1 and S2, thereby cooling the air-conditioned spaces S1 and S2. The refrigerant sent to the outdoor unit 2 is sucked into the compressor 21 via the switching mechanism 23.

<Heating operation>
Next, the heating operation will be described. When an instruction for heating operation is given from the control device 106 to the refrigeration air conditioner 101 via the indoor operation units 84a, 84b, 84c, 84d of the indoor control units 8a, 8b, 82c, 82d, the switching mechanism 23 is in the heating operation state. The compressor 21, the outdoor fan 26, and the indoor fan 33 are started by switching to (the state indicated by the broken line of the switching mechanism 23 in FIG. 10). Then, the refrigerant discharged from the compressor 21 is sent from the outdoor unit 2 to the indoor units 3a, 3b, 3c, and 3d via the switching mechanism 23 and the gas refrigerant communication pipe 105. The refrigerant sent to the indoor units 3a, 3b, 3c, 3d is sent to the indoor heat exchangers 32a, 32b, 32c, 32d. The refrigerant sent to the indoor heat exchangers 32a, 32b, 32c, and 32d is air-conditioned by the indoor fans 33a, 33b, 33c, and 33d in the indoor heat exchangers 32a, 32b, 32c, and 32d that function as refrigerant radiators. Heat is exchanged with room air supplied from the spaces S1 and S2 to cool and cool down. This refrigerant is sent to the expansion mechanisms 31a, 31b, 31c, and 31d. The refrigerant sent to the expansion mechanisms 31a, 31b, 31c, and 31d is decompressed in the expansion mechanisms 31a, 31b, 31c, and 31d, and is transferred from the indoor units 3a, 3b, 3c, and 3d to the outside via the liquid refrigerant communication tube 104. Sent to unit 2. On the other hand, the indoor air heated in the indoor heat exchangers 32a, 32b, 32c, 32d is sent to the air-conditioned spaces S1, S2, thereby heating the air-conditioned spaces S1, S2. The refrigerant sent to the outdoor unit 2 is sent to the outdoor heat exchanger 24. The refrigerant sent to the outdoor heat exchanger 24 evaporates by being heated by exchanging heat with outdoor air supplied by the outdoor fan 26 in the outdoor heat exchanger 24 functioning as a refrigerant evaporator. This refrigerant is sucked into the compressor 21 via the switching mechanism 23.

(3) Judgment process for ensuring safety against leakage of refrigerant during construction In the refrigerant circuit 110 of the refrigeration air conditioner 101 of the present embodiment, as in the refrigerant circuit 10 of the refrigeration air conditioner 1 of the first embodiment, Since a refrigerant having a slight flammability or a strong flammability is filled and the refrigerant leaks, there is a possibility that the refrigerant concentration in the air-conditioned spaces S1 and S2 may reach a limit concentration, which may cause an ignition accident.

  For this reason, also in the refrigerating and air-conditioning apparatus 101 of the present embodiment, in the same way as the refrigerating and air-conditioning apparatus 1 according to the first embodiment, the refrigerant leakage is performed as a determination process for ensuring safety against the leakage of the refrigerant during construction. Whether or not the safety measure threshold value RCLm that requires safety measures to be taken is exceeded (here, whether or not the refrigerant filling rate C exceeds the safety measure threshold value RCLm) is controlled during construction of the refrigeration air conditioner 101 Only after the input to the device 106 is the processing to prevent the operation including the trial operation of the refrigerant circuit 110 from being performed.

  That is, in the control device 106, as shown in FIG. 11, the indoor CPUs 81a, 81b, 81c, 81d of the indoor controllers 8a, 8b, 8c, 8d are further provided with determination result processors 86a, 86b, 86c, 86d. A determination process as shown in the flowchart of FIG. 4 is performed by the control device 106 including the determination result processing units 86a, 86b, 86c, and 86d. However, unlike the refrigerating and air-conditioning apparatus 1 according to the first embodiment, the refrigerating and air-conditioning apparatus 101 of the present embodiment and the outdoor unit 2 and a plurality of (here, four) indoor units 3a, 3b, 3c, and 3d. Since the indoor multi-type refrigeration and air-conditioning apparatus is configured by connecting to the indoor units 3a, 3b, 3c, and 3d, the installation conditions such as the volumes of the air-conditioned spaces S1 and S2 are different, and the judgment at the time of construction is made. The results are often different for each of the indoor units 3a, 3b, 3c, and 3d. Therefore, here, the determination processing in steps ST1 to ST4 is performed corresponding to each of the indoor units 3a, 3b, 3c, and 3d as follows.

  The determination result processing units 86a, 86b, 86c, and 86d are safety measures that need to take safety measures against refrigerant leakage at the time of construction of the refrigerating and air-conditioning apparatus 101 (before the operation including the trial operation of the refrigerant circuit 110) in step ST1. The judgment result at the time of construction whether or not the threshold value RCLm is exceeded (here, whether or not the refrigerant filling rate C exceeds the safety measure threshold value RCLm) is accepted. Here, the judgment result at the time of construction for the indoor units 3a and 3b whose air-conditioned space S1 is the air conditioning target is that the refrigerant filling amount M filled in the refrigerant circuit 110 of the refrigeration air-conditioning apparatus 101 is the air-conditioning target. The refrigerant filling rate C1 is obtained by dividing by the indoor volume V1 of the air-conditioned space S1 and the result obtained by determining whether or not the refrigerant filling rate C1 exceeds the safety measure threshold value RCLm in FIG. is there. Moreover, the construction-time determination result for the indoor units 3a and 3b whose air-conditioned space S2 is the air-conditioning target is the air-conditioning object on the construction side where the refrigerant charge amount M charged in the refrigerant circuit 110 of the refrigeration air-conditioning apparatus 101 is the air-conditioning target. This is a result obtained by dividing the indoor volume V2 of the air-conditioned space S2 to obtain the refrigerant filling rate C2, and determining whether the refrigerant filling rate C2 exceeds the safety measure threshold value RCLm in FIG. . And, the judgment result at the time of construction for each indoor unit 3a, 3b, 3c, 3d obtained on this builder side is a value that means that the refrigerant filling rate C1, C2 does not exceed the safety measure threshold RCLm, or The refrigerant filling rates C1 and C2 are input to the control device 106 through the indoor operation units 84a, 84b, 84c, and 84d as a value that means that the safety measure threshold value RCLm is exceeded, and the determination result processing units 86a, 86b, and 86c. , 86d.

  Next, in step ST2, the determination result processing units 86a, 86b, 86c, and 86d determine whether or not the accepted construction time determination result is safe against refrigerant leakage. In this step ST2, when all the construction-time judgment results received by the judgment result processing units 86a, 86b, 86c, 86d do not exceed the safety measure threshold value RCLm (that is, for all the indoor units 3a, 3b, 3c, 3d) If the judgment result at the time of construction does not exceed the safety measure threshold value RCLm), the judgment result processing units 86a, 86b, 86c, 86d judge that it is safe against the leakage of the refrigerant, and proceed to the process of step ST3. To do. Then, the determination result processing units 86a, 86b, 86c, 86d store the accepted construction time determination results in the indoor storage units 83a, 83b, 83c, 83d of the control device 106 in step ST3, and then in step ST4. The operation including the trial operation of the refrigerant circuit 110 is permitted. The indoor storage units 86a, 86b, 86c, and 86d also store the date when the construction time determination result is input to the control device 106, together with the construction time determination result. Here, the date stored in the indoor storage units 83a, 83b, 83c, and 83d may be input to the control device 106 via the indoor operation units 84a, 84b, 84c, and 84d together with the construction time determination result. In addition, when the control device 106 has a calendar function, the date indicated by the calendar function when the construction time determination result is input to the control device 106 may be used. The construction judgment results and dates stored in the indoor storage units 83a, 83b, 83c, 83d are, for example, via the indoor operation units 84a, 84b, 84c, 84d and the indoor display units 85a, 85b, 85c, 85d. Thus, output can be performed after the construction of the refrigeration air-conditioning apparatus 101.

  On the other hand, if any of the construction-time judgment results received by the judgment result processing units 86a, 86b, 86c, 86d exceeds the safety measure threshold RCLm in Step ST2 (that is, construction for the indoor units 3a, 3b, 3c, 3d). If any of the time determination results exceeds the safety measure threshold value RCLm), the determination result processing units 86a, 86b, 86c, 86d determine that it is not safe against the leakage of the refrigerant, and perform steps ST3 and ST4. The process returns to the process of step ST1 without shifting to the process (that is, without permitting the operation including the trial operation of the refrigerant circuit 110). At this time, it is preferable to display a warning indicating that it is not safe against leakage of the refrigerant on the indoor display portions 85a, 85b, 85c, 85d and the like. Then, for example, the indoor volumes V1 and V2 of the air-conditioned spaces S1 and S2 are increased or the refrigerant filling amount M charged in the refrigerant circuit 110 is reduced until a safety measure against refrigerant leakage is taken on the construction side. By doing so, the refrigerant filling rates C1 and C2 do not exceed the safety measure threshold RCLm, and in step ST1, the refrigerant filling rates C1 and C2 exceed the safety measure threshold RCLm for all the indoor units 3a, 3b, 3c, and 3d. The operation result including the trial operation of the refrigerant circuit 110 is not performed until it is determined that it is safe against the leakage of the refrigerant in step ST2.

  Thus, the effect similar to the refrigeration air conditioner 1 concerning said 1st Embodiment can be obtained here. In addition, here, it is possible to reliably determine whether it is necessary to take safety measures against refrigerant leakage for each of the indoor units 3a, 3b, 3c, and 3d. Can be encouraged to take the necessary safety measures appropriately. Further, when an accident due to refrigerant leakage occurs, it can be confirmed for each of the indoor units 3a, 3b, 3c, and 3d whether or not an appropriate judgment has been made on the refrigerant leakage at the time of construction. Can contribute to clarifying the cause of accidents and the location of responsibilities.

(4) Modification 1
In the refrigerating and air-conditioning apparatus 101 of the present embodiment as well, as in the refrigerating and air-conditioning apparatus 1 according to the first modification of the first embodiment, the construction-time determination information necessary for obtaining the construction-time determination result is After the construction process is input to the control device 106 and the construction device determination result is obtained by the control device 106, a process that prevents the operation including the trial operation of the refrigerant circuit 110 may be performed.

  Specifically, determination processing as shown in the flowchart of FIG. 5 is performed in the determination result processing units 86a, 86b, 86c, and 86d of the control device 106. However, even in this case, the installation conditions such as the volume of the air-conditioned spaces S1, S2 are different for each of the indoor units 3a, 3b, 3c, 3d, and construction determination information is also provided for each of the indoor units 3a, 3b, 3c, 3d. In consideration of the fact that there are many cases where they are different, the determination processing of steps ST11, ST12 and ST2 to ST4 is performed corresponding to each indoor unit 3a, 3b, 3c, 3d as follows.

  In step ST11, the determination result processing units 86a, 86b, 86c, and 86d are different from step ST1 of the above-described embodiment in the construction of the refrigeration air conditioner 101 (before the operation including the trial operation of the refrigerant circuit 110). Accepts construction time judgment information necessary to obtain a judgment result. Here, the judgment information at the time of construction is the refrigerant filling amount M and the space volume of the air-conditioned spaces S1 and S2 that are necessary for calculating the refrigerant filling rates C1 and C2 and the refrigerant filling rates C1 and C2 calculated on the construction side. V1, V2, etc. The construction time determination information is input to the control device 106 via the indoor operation units 84a, 84b, 84c, and 84d, and received by the determination result processing units 86a, 86b, 86c, and 86d.

  Next, in step ST12, the determination result processing units 86a, 86b, 86c, and 86d acquire the determination result at the time of construction. For example, when the refrigerant filling rates C1 and C2 are input to the control device 106 in step ST11, the determination result processing units 86a, 86b, 86c, and 86d indicate that the input refrigerant charging rates C1 and C2 are the safety measure threshold values. The judgment result at the time of construction is acquired by judging whether or not RCLm is exceeded. In Step ST11, when the refrigerant filling amount M and the space volumes V1, V2 are input to the control device 106, the determination result processing units 86a, 86b, 86c, 86d use the refrigerant filling amount M as the space volume V1, The refrigerant filling rates C1 and C2 are calculated by dividing by V2, and the judgment result at the time of construction is acquired by judging whether or not the calculated refrigerant filling rates C1 and C2 exceed the safety measure threshold value RCLm. Here, the safety measure threshold value RCLm may be input as construction determination information, or is stored and prepared in the outdoor storage units 73a, 73b, 73c, and 73d and the indoor storage units 83a, 83b, 83c, and 83d. It may be a thing.

  Next, the determination result processing units 86a, 86b, 86c, and 86d determine whether or not the acquired construction determination result is safe against refrigerant leakage in step ST2, as in the above embodiment. . In this step ST2, when the construction time judgment result acquired by the judgment result processing units 86a, 86b, 86c, 86d does not exceed the safety measure threshold value RCLm (that is, construction time for all the indoor units 3a, 3b, 3c, 3d) If the determination result does not exceed the safety measure threshold value RCLm), the determination result processing units 86a, 86b, 86c, 86d determine that it is safe against the leakage of the refrigerant, and shift to the process of step ST3. Then, the determination result processing units 86a, 86b, 86c, 86d store the obtained construction time determination results in the indoor storage units 83a, 83b, 83c, 83d of the control device 106 in step ST3, and then in step ST4, The operation including the trial operation of the refrigerant circuit 110 is permitted. The indoor storage units 83a, 83b, 83c, and 83d also store the date when the construction time judgment information is input to the control device 106 and the construction time judgment result is obtained together with the construction time judgment result. Here, the dates stored in the indoor storage units 83a, 83b, 83c, and 83d may be input to the control device 106 via the indoor operation units 84a, 84b, 84c, and 84d together with the construction time determination information. Alternatively, when the control device 106 has a calendar function, it may be a date indicated by the calendar function when construction time determination information is input and a construction time determination result is obtained. The construction judgment results and dates stored in the indoor storage units 83a, 83b, 83c, 83d are, for example, via the indoor operation units 84a, 84b, 84c, 84d and the indoor display units 85a, 85b, 85c, 85d. Thus, output can be performed after the construction of the refrigeration air-conditioning apparatus 101.

  On the other hand, when the construction time judgment result acquired by the judgment result processing units 86a, 86b, 86c, 86d exceeds the safety measure threshold RCLm in Step ST2 (that is, the construction time judgment result for the indoor units 3a, 3b, 3c, 3d). In the case where any of the above exceeds the safety measure threshold RCLm), the determination result processing units 86a, 86b, 86c, 86d determine that it is not safe against the leakage of the refrigerant, as in the above-described embodiment, The process returns to the process of step ST1 without shifting to the process of steps ST3 and ST4 (that is, without permitting the operation including the trial operation of the refrigerant circuit 110). At this time, it is preferable to display a warning indicating that it is not safe against leakage of the refrigerant on the indoor display portions 85a, 85b, 85c, 85d and the like. Then, until safety measures against refrigerant leakage are taken on the construction side, for example, the refrigerant volume is filled by increasing the indoor volume V of the air-conditioned space or reducing the refrigerant charge amount M charged in the refrigerant circuit 110. The rate C1 and C2 do not exceed the safety measure threshold value RCLm, and in step ST11, construction time judgment information that can obtain a judgment result at construction time that the refrigerant filling rates C1 and C2 do not exceed the safety measure threshold value RCLm is input. Then, in step ST12, the refrigerant filling ratios C1 and C2 are obtained during construction so that the safety measure threshold value RCLm is not exceeded, and in step ST2, the refrigerant is determined to be safe against refrigerant leakage. The operation including the trial operation of the circuit 110 is disabled.

(5) Modification 2
Also in the refrigerating and air-conditioning apparatus 101 of the present embodiment, similarly to the refrigerating and air-conditioning apparatus 1 according to the second modification of the first embodiment, safety against refrigerant leakage during the construction of the above-described embodiment and the first modification is provided. In the determination process for ensuring, even if the construction time judgment result input to the control device 106 or the construction time judgment result acquired by the control device 106 exceeds the safety measure threshold value RCLm, the refrigerant detection device or the ventilation device When safety measures are taken against leakage of the refrigerant by installing a safety measure device such as a refrigerant shut-off device or an alarm device, a process for permitting an operation including a trial operation of the refrigerant circuit 110 is added. Also good.

  In the control device 106, as shown in FIG. 13, the indoor CPUs 81a, 81b, 81c, 81d of the indoor control units 8a, 8b, 8c, 8d are further provided with safety measure receiving units 87a, 87b, 87c, 87d. 8 is performed by the control device 106 including the safety measure receiving units 87a, 87b, 87c, and 87d together with the determination result processing units 86a, 86b, 86c, and 86d. Here, as shown in FIG. 12, it is assumed that the refrigerant detection devices 11a and 11b are installed in the air-conditioned spaces S1 and S2 as a safety measure device against refrigerant leakage. Further, in the following description, similar to the above-described embodiment, the description will be made on the assumption that the construction-time determination result is input to the control device 106 (that is, the process including step ST1). 1, even if it is a premise that construction-time determination information is input to the control device 106 (that is, processing including steps ST11 and ST12), the same determination can be made by replacing the processing in step ST1 with the processing in steps ST11 and ST12. Processing can be performed. However, even in this case, the installation conditions such as the volume of the air-conditioned spaces S1 and S2 are different for each of the indoor units 3a, 3b, 3c, and 3d, and the construction determination result and the construction determination information are also the indoor units 3a, 3b, In many cases, it is different for each of 3c and 3d, and the safety device may be different for each of the indoor units 3a, 3b, 3c and 3d. Therefore, here, for each of the indoor units 3a, 3b, 3c, and 3d, determination processing by the corresponding determination result processing units 86a, 86b, 86c, and 86d and the safety measure receiving units 87a, 87b, 87c, and 87d is performed as follows. Has been done.

  Similar to the above embodiment, the determination result processing units 86a, 86b, 86c, 86d are safe against refrigerant leakage at the time of construction of the refrigerating and air-conditioning apparatus 101 (before the operation including the test operation of the refrigerant circuit 110) in step ST1. The judgment result at the time of construction of whether or not the safety measure threshold value RCLm that needs countermeasures is exceeded (here, whether or not the refrigerant filling rate C exceeds the safety measure threshold value RCLm) is accepted.

  Next, the determination result processing units 86a, 86b, 86c, and 86d determine whether or not the accepted determination result at the time of construction is safe against refrigerant leakage in step ST2, as in the above-described embodiment. . In this step ST2, when the construction time judgment result received by the judgment result processing units 86a, 86b, 86c, 86d does not exceed the safety measure threshold value RCLm (that is, construction time for all the indoor units 3a, 3b, 3c, 3d) In the case where the determination result does not exceed the safety measure threshold RCLm), the determination result processing units 86a, 86b, 86c, 86d determine that it is safe against the leakage of the refrigerant, and as in the above embodiment, The process proceeds to step ST3, and the determination result processing units 86a, 86b, 86c, 86d store the construction determination result in the indoor storage units 83a, 83b, 83c, 83d of the control device 106 in step ST3. After that, in step ST4, the operation including the trial operation of the refrigerant circuit 110 is permitted.

  On the other hand, when the construction time judgment result received by the judgment result processing units 86a, 86b, 86c, 86d exceeds the safety measure threshold RCLm in Step ST2 (that is, the construction time judgment result for the indoor units 3a, 3b, 3c, 3d). If any of the above exceeds the safety measure threshold value RCLm), the determination result processing units 86a, 86b, 86c, and 86d determine that it is not safe against the leakage of the refrigerant as in the above embodiment. However, here, unlike the above embodiment, the process proceeds to step ST21.

  Next, in step ST21, the safety measure receiving units 87a, 87b, 87c, and 87d determine whether or not a safety measure device for refrigerant leakage is installed. For example, when the safety measure device (refrigerant detection devices 11a and 11b in FIG. 12) is installed on the construction side, the fact that the safety measure device has been installed (safety measure installation information) The meaning value is input to the control device 106 via the indoor operation units 84a, 84b, 84c, and 84d, and is received by the safety measure receiving units 87a, 87b, 87c, and 87d. Then, the judgment result processing units 86a, 86b, 86c, 86d are arranged to be safe against refrigerant leakage by installing the safety countermeasure device according to the safety countermeasure installation information received by the safety countermeasure receiving sections 87a, 87b, 87c, 87d. As if measures were taken, in the same way as in the case where it was determined in step ST2 that the construction-time determination result is safe against refrigerant leakage, the process proceeds to steps ST3 and ST4. After being stored in the indoor storage units 83a, 83b, 83c, and 83d of the control device 106, the operation including the trial operation of the refrigerant circuit 110 is permitted. Here, the control device 106 stores safety measure installation information together with the determination result during construction. Note that the method of inputting safety measure installation information is not limited to that input via the indoor operation units 84a, 84b, 84c, and 84d. For example, as shown in FIG. 13, refrigerant detection as a safety measure device is performed. The devices 11a and 11b are connected to the control device 106, and signals from the refrigerant detection devices 11a and 11b are input to the control device 106 and transmitted to the safety measure receiving portions 87a, 87b, 87c and 87d. May be used.

  On the other hand, in step ST21, when it is determined that the safety countermeasure device against refrigerant leakage (refrigerant detection devices 11a and 11b in FIG. 12) is not installed, the determination result processing units 86a, 86b, 86c, and 86d. In the same manner as in the above-described embodiment, it is determined that the refrigerant is not safe against leakage of the refrigerant, and the process including steps ST3 and ST4 is not permitted (that is, the operation including the trial operation of the refrigerant circuit 110 is permitted). Without returning to the process of step ST1. Then, on the contractor side, safety measures against refrigerant leakage including installation of safety measures are taken, and the trial operation of the refrigerant circuit 110 is performed until it is determined in step ST2 that the refrigerant circuit is safe against refrigerant leakage. Do not allow driving that includes.

(6) Modification 3
In the above embodiment and its modifications 1 and 2, the refrigerating and air-conditioning apparatus 101 is configured by connecting the outdoor unit 2 and a plurality (here, four) of indoor units 3a, 3b, 3c, and 3d. Therefore, if an accident due to refrigerant leakage (particularly an ignition accident) occurs, the indoor units 3a, 3b, 3c, 3d may be damaged, and the indoor control units 8a, 8b, 8c, 8d (here, In addition, there is a risk that the judgment result at the time of construction stored in the indoor storage units 83a, 83b, 83c, 83d) will disappear.

  In view of this, here, the judgment results at the time of construction of the indoor units 3a, 3b, 3c, and 3d are stored not only in the corresponding indoor controller but also in other indoor controllers. For example, the judgment result at the time of construction of the indoor unit 3a is stored not only in the corresponding indoor control unit 8a but also in the other indoor control units 8b, 8c and 8d (in this case, the indoor storage units 83b, 83c and 83d). It is.

  In addition, here, as in the refrigeration and air conditioning apparatus 1 according to the modification 3 of the first embodiment, not only the corresponding indoor control unit, but also the determination result at the time of construction of each indoor unit 3a, 3b, 3c, 3d, You may make it memorize | store also in the outdoor control part 7. FIG. That is, the construction judgment result and the like are transmitted from the indoor control units 8a, 8b, 8c and 8d to the outdoor control unit 7 through the transmission units 72, 82a, 82b, 82c and 82d and stored in the outdoor storage unit 73. is there. Here, as shown in FIG. 14, an outdoor output unit 74 is provided in the outdoor control unit 7 so that it can be output easily after the refrigeration air-conditioning apparatus 101 is installed. In addition, the construction determination result and the like may be stored in the outdoor control unit 7 and may be stored in another indoor control unit.

  Thereby, the judgment result at the time of construction can be left reliably here, and it can contribute to clarification of the cause of the accident by the leakage of a refrigerant, and the location of responsibility.

(7) Modification 4
In the refrigerating and air-conditioning apparatus 101 configured by connecting the outdoor unit 2 and a plurality (here, four) of indoor units 3a, 3b, 3c, and 3d, as shown in FIG. In some cases, the central control unit 9 is provided, and the central control unit 9 collectively controls the devices constituting the plurality of indoor units 3a, 3b, 3c, and 3d. Here, the central control unit 9 receives an input of an operation command or the like, issues an operation command to the plurality of indoor units 3a, 3b, 3c, and 3d, displays an operation display, and the like. It is composed. The central control unit 9 mainly includes a central CPU 91, a central transmission unit 92, a central storage unit 93, a central operation unit 94, and a central display unit 95. The centralized CPU 91 is connected to the centralized transmission unit 92, the centralized storage unit 93, the centralized operation unit 94, and the centralized display unit 95. The centralized transmission unit 92 transmits and receives control data and the like to and from the indoor transmission units 82a, 82b, 82c, and 82d and the outdoor transmission unit 72. The central storage unit 93 stores control data and the like. The centralized operation unit 94 inputs a control command and the like. The central display unit 95 performs operation display and the like. Then, the centralized CPU 91 receives an input of a control command or the like via the centralized operation unit 94, reads and writes control data and the like in the centralized storage unit 93, performs operation display on the centralized display unit 95, and the centralized transmission unit A control command is issued to the indoor control units 8a, 8b, 8c, 8d of the indoor units 3a, 3b, 3c, and 3d and the outdoor control unit 7 of the outdoor unit 2 via 92.

  And when it has such a centralized control part 9, in said embodiment and its modification 1, determination provided in indoor CPU81a, 81b, 81c, 81d of indoor control part 8a, 8b, 8c, 8d The result processing unit may be provided as the determination result processing unit 96 in the centralized CPU 91 of the centralized control unit 9. Although not shown in FIG. 15, in the second modification of the above embodiment, the safety measure receiving unit provided in the indoor CPUs 81a, 81b, 81c, 81d of the indoor control units 8a, 8b, 8c, 8d The countermeasure accepting unit 97 may be provided in the centralized CPU 91 of the centralized control unit 9.

  Also in this case, the judgment results at the time of construction of the indoor units 3a, 3b, 3c, and 3d are stored in the corresponding indoor controllers 8a, 8b, 8c, and 8d (in this case, the indoor storage units 83a, 83b, 83c, and 83d). If it memorize | stores, the effect similar to said embodiment and its modifications 1 and 2 can be acquired.

  In addition, here, as in the third modification of the above-described embodiment, not only the corresponding indoor control unit, but also other indoor control units store the judgment results during construction of the indoor units 3a, 3b, 3c, and 3d. Or may be stored in the outdoor control unit 7 (in this case, the outdoor storage unit 73). In addition, the construction determination results of the indoor units 3a, 3b, 3c, and 3d are stored in the central storage unit 93 of the central control unit 9, and the refrigeration and air-conditioning apparatus 101 is connected via the central operation unit 94 and the central display unit 95. It may be possible to output after the construction.

(8) Modification 5
In the refrigerating and air-conditioning apparatus 101 in the above-described embodiment and Modifications 1 to 4, a plurality (here, four) of indoor units 3a, 3b, 3c, and 3d divide the air-conditioning of the two air-conditioned spaces S1 and S2. It is arranged to take charge. Specifically, the indoor units 3a and 3b are arranged so as to be in charge of air conditioning of the air-conditioned space S1, and the indoor units 3c and 3d are arranged so as to be in charge of air-conditioning of the air-conditioned space S2.

  For this reason, in said embodiment and the modifications 1-4, several indoor unit 3a, 3b, 3c, 3d is grouped for every air-conditioned space S1, S2, and the judgment result at the time of construction to the control apparatus 106, You may make it input the judgment information at the time of construction corresponding to each group (here air-conditioned space S1, S2) set by grouping. That is, in a refrigeration air conditioner configured by connecting an outdoor unit and a plurality of indoor units and grouping the indoor units for each air-conditioned space, the volume of the air-conditioned space for each group of indoor units, etc. Therefore, it is considered that the construction judgment results and construction judgment information are often different for each group of indoor units. Specifically, in the above-described embodiment and Modifications 1 to 4, where the construction time determination result and the construction time determination information are input to each indoor unit 3a, 3b, 3c, 3d, for example, For the group of the air-conditioned space S1 (that is, collectively for the indoor units 3a and 3b), the construction time judgment result and the construction time judgment information are input, and the group of the air-conditioned space S2 (that is, The judgment result at the time of construction and the judgment information at the time of construction are input to the indoor units 3c and 3d collectively.

  Even in this case, the same effects as those of the above-described embodiment and the first to fourth modifications thereof can be obtained.

(9) Modification 6
In the refrigerating and air-conditioning apparatus 101 according to the above-described embodiment and Modifications 1 to 5, it is desired to correct the judgment result at the time of construction stored in the control device 106 by some mistake or a slight change in usage conditions after construction. There is a case. In such a case, it is inconvenient that the construction judgment result cannot be corrected. In addition, when this correction does not affect the judgment of necessity of safety measures against refrigerant leakage, unlike the construction of the refrigeration air conditioner 101, necessity of safety measures against refrigerant leakage, etc. It is preferable to continue the operation of the refrigerant circuit 110 without making the determination again.

  Therefore, here, the construction judgment result stored in the control device 106 is overwritten with another construction judgment result so that it can be stored (overwriting process).

  In the control unit 106, as shown in FIG. 16, the indoor CPUs 81a, 81b, 81c, 81d of the indoor control units 8a, 8b, 8c, 8d are further provided with overwrite processing units 88a, 88b, 88c, 88d, A determination process as shown in the flowchart of FIG. 17 is performed by the control device 106 including the overwrite processing units 88a, 88b, 88c, and 88d together with the determination result processing units 86a, 86b, 86c, and 86d. Further, in the following description, similar to the above-described embodiment, the description will be made on the assumption that the construction-time determination result is input to the control device 106 (that is, the process including step ST1). 1, even if it is a premise that construction-time determination information is input to the control device 106 (that is, processing including steps ST11 and ST12), the same determination can be made by replacing the processing in step ST1 with the processing in steps ST11 and ST12. Processing can be performed. Therefore, here, for each of the indoor units 3a, 3b, 3c, and 3d, determination processing by the corresponding determination result processing units 86a, 86b, 86c, and 86d and the overwrite processing units 88a, 88b, 88c, and 88d is performed as follows. To be done. In addition, since the determination process at the time of construction of the refrigerating and air-conditioning apparatus 101 in steps ST1 to ST4 by the determination result processing units 86a, 86b, 86c, and 86d is the same as that in the above embodiment, the description is omitted here and the overwrite process is performed. The overwriting process by the units 88a, 88b, 88c, 88d will be described.

  The overwrite processing units 88a, 88b, 88c, and 88d accept the construction determination result in step ST61 after the operation is permitted in step ST4. This construction determination result is input to the control device 106 via the indoor operation units 84a, 84b, 84c, and 84d, and is received by the overwrite processing units 88a, 88b, 88c, and 88d. In step ST61, the refrigerating and air-conditioning apparatus 101 is maintained in an operation-permitted state until the construction-time determination result is accepted.

  Next, the overwrite processing units 88a, 88b, 88c, and 88d receive the construction-time judgment results received in step ST62 in the construction-time judgment results stored in the indoor storage units 83a, 83b, 83c, and 83d of the control device 106. Is overwritten and stored in the indoor storage units 83a, 83b, 83c, 83d, etc., and then the process returns to step ST61 again. Also at this time, the refrigerating and air-conditioning apparatus 101 is maintained in a state where operation is permitted.

  As described above, after the operation is permitted in step ST4, the state where the operation of the refrigeration / air-conditioning apparatus 101 is permitted is maintained, and the overwriting process in steps ST61 and ST62 is possible.

  Thereby, after construction of the refrigerating and air-conditioning apparatus 101, the judgment result during construction can be appropriately corrected while allowing the refrigerant circuit 110 to continue to be operated.

  Moreover, in the refrigeration air conditioner 101 in said embodiment and the modifications 1-5, the use condition of the refrigeration air conditioner 101 may be changed by performing maintenance, remodeling, and moving after construction. In this case, before restarting the operation of the refrigerant circuit 110, it is necessary to determine again whether it is necessary to take safety measures against the leakage of the refrigerant. However, in the refrigerating and air-conditioning apparatus 101 in which the construction-time judgment result is input or the construction-time judgment result is obtained before maintenance, remodeling, or relocation, the refrigerant circuit 101 can already be operated. Therefore, it is possible to restart the operation of the refrigerant circuit 110 without re-determining whether it is necessary to take safety measures against refrigerant leakage, and there is a risk that safety against refrigerant leakage may not be ensured. This also applies to the refrigerating and air-conditioning apparatus 101 provided with the above-described overwrite processing units 88a, 88b, 88c, and 88d so that the overwriting process can be performed.

  Therefore, here, the construction time determination result stored in the control device 106 can be erased, and when the construction time judgment result is erased, the construction time judgment result is input again to the control device 106. Otherwise, the operation including the trial operation of the refrigerant circuit 110 can be performed only after the construction time judgment information is input again to the control device 106 and the construction time judgment result is obtained again in the control device 106. ing.

  In the control unit 106, as shown in FIG. 16, reset CPUs 89a, 89b, 89c, and 89d are further provided in the indoor CPUs 81a, 81b, 81c, and 81d of the indoor control units 8a, 8b, 8c, and 8d. A determination process as shown in the flowchart of FIG. 17 is performed by the control device 106 including the reset processing units 89a, 89b, 89c, and 89d together with the determination result processing units 86a, 86b, 86c, and 86d. Further, in the following description, similar to the above-described embodiment, the description will be made on the assumption that the construction-time determination result is input to the control device 106 (that is, the process including step ST1). 1, even if it is a premise that construction-time determination information is input to the control device 106 (that is, processing including steps ST11 and ST12), the same determination can be made by replacing the processing in step ST1 with the processing in steps ST11 and ST12. Processing can be performed. Therefore, here, for each of the indoor units 3a, 3b, 3c, 3d, the determination processing by the corresponding determination result processing units 86a, 86b, 86c, 86d and the reset processing units 89a, 89b, 89c, 89d is performed as follows. To be done. In addition, since the determination process at the time of construction of the refrigerating and air-conditioning apparatus 101 in steps ST1 to ST4 by the determination result processing units 86a, 86b, 86c, and 86d is the same as that in the above embodiment, the description is omitted here and the reset process is performed. The reset process by the units 89a, 89b, 89c, and 89d will be described.

  The reset processing units 89a, 89b, 89c, and 89d determine whether or not the reset processing condition is satisfied in step ST71 after the operation is permitted in step ST4. Here, when the control device 106 is instructed to perform maintenance, modification, transfer, etc. via the indoor operation units 84a, 84b, 84c, 84d, the refrigeration air conditioner 101 is energized by maintenance, modification, transfer, etc. If there is no more, it is determined that the reset processing condition is satisfied. On the other hand, when maintenance, remodeling, relocation or the like is not performed, the refrigeration air conditioner 101 is maintained in a state where operation is permitted.

  Next, when it is determined in step ST71 that the reset processing condition is satisfied, the reset processing units 89a, 89b, 89c, and 89d perform the indoor storage units 83a, 83b, 83c, and 83d of the control device 106 in step ST72. The construction determination result stored in the above is deleted, and reset processing is returned to the processing of steps ST1 to ST4. Here, as described above, the construction-time judgment results stored in the indoor storage units 83a, 83b, 83c, 83d, etc. of the control device 106 can be deleted via the indoor operation units 84a, 84b, 84c, 84d. It may be executed when the control device 106 is informed that remodeling, relocation, etc. is performed, or set so that it is automatically executed when the refrigeration air-conditioning apparatus 101 is de-energized. You may keep it. Thereby, after performing maintenance, remodeling, relocation, and the like, the processing of steps ST1 to ST4 is performed again, so that the construction circuit determination result is not input to the control device 106 again. It is possible to prevent operation including trial operation.

  As a result, here, after maintenance, remodeling, relocation, or remodeling of the building where the refrigeration air-conditioning apparatus 101 is installed, the refrigerant circuit is the same as in the construction of the refrigeration air-conditioning apparatus 101. Before performing the operation of 110, it is possible to reliably determine whether or not a safety measure is necessary for the leakage of the refrigerant.

  The overwriting process and the reset process can be applied also to the refrigeration air conditioner 1 according to the first embodiment and the modification thereof.

  The present invention is widely applicable to a refrigerating and air-conditioning apparatus having a refrigerant circuit in which refrigerant circulates and a control device that performs operation control of equipment constituting the refrigerant circuit.

DESCRIPTION OF SYMBOLS 1,101 Refrigeration air conditioner 2 Outdoor unit 3, 3a-3d Indoor unit 6, 106 Control apparatus 7 Outdoor control part 8, 8a-8d Indoor control part 9 Central control part 10, 110 Refrigerant circuit

JP 2001-74283 A

Claims (11)

In a refrigerating and air-conditioning apparatus having a refrigerant circuit (10, 110) through which a refrigerant circulates and a control device (6, 106) that performs operation control of equipment constituting the refrigerant circuit,
It is not after the judgment result at the time of construction whether or not the safety countermeasure threshold value that needs to take safety measures against leakage of the refrigerant is exceeded is input to the control device at the time of construction of the refrigeration air conditioner, or at the time of construction Unless the construction time judgment information necessary for obtaining the judgment result is input to the control device at the time of construction of the refrigeration air conditioner and the construction time judgment result is obtained in the control device, the refrigerant circuit is tested. and so as not to perform the operation, including,
The safety measure threshold is a threshold of a refrigerant filling rate obtained by dividing the amount of refrigerant charged in the refrigerant circuit by the indoor volume of the air-conditioned space to be air-conditioned.
The construction-time determination result is obtained by determining whether the refrigerant filling rate exceeds the safety measure threshold.
Refrigeration air conditioner (1, 101). The construction judgment result is stored in the control device (6, 106) and can be output after construction of the refrigeration air conditioner.
The refrigeration air conditioner (1, 101) according to claim 1. The construction time determination result is stored in the control device together with the date when the construction time determination result is input to the control device (6, 106) or with the date when the construction time determination result is obtained in the control device. Stored, the date can be output together with the judgment result at the time of construction after construction of the refrigeration air conditioner,
The refrigeration air conditioner (1, 101) according to claim 2. The refrigerant circuit (10, 110) is configured by connecting an outdoor unit (2) and an indoor unit (3, 3a to 3d),
The control device (6, 106) includes an outdoor control unit (7) for controlling the devices constituting the outdoor unit, an indoor control unit (8, 8a to 8d) for controlling the devices constituting the indoor unit, Have
The construction time determination result is stored in both the outdoor control unit and the indoor control unit.
The refrigeration air conditioner (1, 101) according to claim 2 or 3. The refrigerant circuit (110) is configured by connecting an outdoor unit (2) and a plurality of indoor units (3a to 3d),
Input of the construction time judgment result or the construction time judgment information to the control device (106) is performed corresponding to each indoor unit,
The refrigerating and air-conditioning apparatus (101) according to claim 2 or 3. The refrigerant circuit (110) is configured by connecting an outdoor unit (2) and a plurality of indoor units (3a to 3d),
The plurality of indoor units are grouped for each air-conditioned space,
The construction time determination result or the construction time determination information input to the control device (106) is performed corresponding to each group set by the grouping,
The refrigerating and air-conditioning apparatus (101) according to claim 2 or 3. The control device (106) includes an outdoor control unit (7) for controlling the devices constituting the outdoor unit (2), and an indoor control unit (8a) for controlling the devices constituting the indoor units (3a to 3d). -8d), and
The working time of the determination result of the indoor unit is configured with is stored in the indoor control unit corresponding, the outdoor control unit, and / or, the other indoor control unit, and / or, the plurality of indoor units In the case of having a centralized control unit (9) that collectively controls devices to be stored, the centralized control unit is also stored.
The refrigerating and air-conditioning apparatus (101) according to claim 5 or 6. The construction judgment result can be deleted after being stored in the control device (6, 106).
When the construction time determination result is deleted, it is not after the construction time determination result is input again to the control device, or the construction time determination information is input again to the control device and the control is performed. In order to prevent the operation including the trial operation of the refrigerant circuit from being performed after the construction result is obtained again in the apparatus,
The refrigeration air conditioner (1, 101) according to any one of claims 2 to 7. After the construction time determination result is stored in the control device (6, 106), another construction time determination result can be overwritten and stored.
The refrigeration air conditioner (1, 101) according to any one of claims 2 to 8. The control device (6, 106) has a safety measure against the refrigerant leakage in the refrigeration air conditioner when the judgment result at the time of construction is a judgment result that it is necessary to take a safety measure against the refrigerant leakage. Until it is applied, the operation including the trial operation of the refrigerant circuit is prohibited.
The refrigerating and air-conditioning apparatus (1, 101) according to any one of claims 1 to 9 . The refrigerant is nonflammable, or has low or high flammability, or toxicity.
The refrigeration air conditioner (1, 101) according to any one of claims 1 to 10 .

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