JP2011033222A - Water heat source air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heat source air conditioning system capable of preventing the deterioration of the efficiency of an air conditioning device using water as a heat source. <P>SOLUTION: The water heat source air conditioning system 1 has a chiller 3, a water tank 4, a first pump 5, a second pump 7 and a control section 15. The chiller 3 heats or cools water, and the water is stored in the water tank 4. The first pump 5 supplies the water heated or cooled by the chiller 3 to the water tank 4. The second pump 7 supplies heat energy based in the water tank 4 to the air conditioning devices 2a, 2b. The control section 15 controls a group of devices 9 including the first pump 5, the second pump 7 and the chiller 3 to keep a water temperature in the water tank 4 within a prescribed range. The control section 15 determines the occurrence of an abnormality related to the group of devices 9 when a water temperature in the water tank 4 is outside the prescribed range, and performs control to cope with the abnormality to the group of devices 9 on the basis of a result of the determination. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a water heat source air conditioning system, and more particularly to a system that improves the efficiency of an air conditioner that uses water as a heat source.

  Conventionally, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2009-002532), a system using an air conditioner using water as a heat source is known. The system according to Patent Document 1 has a refrigerant circulation system in which refrigerant circulates, an exhaust heat circulation system in which exhaust heat from a mechanical drive source such as a gas engine flows, and a cooling water circulation system in which cooling water circulates. The outdoor unit of the air conditioner is configured to be cooled by cooling water. In particular, in the system according to Patent Document 1, when the temperature of the cooling water is lower than a predetermined temperature during the cooling operation of the air conditioner, by putting the exhaust heat of the mechanical drive source into the cooling water in the cooling water circulation system, Control for increasing the temperature of the cooling water is performed.

  By the way, as a thing for storing the water which is a heat source of the said air conditioner, the water tank by which the inside was divided into the some division may be used. The water in the water tank is circulated, and a temperature difference occurs between the compartments. In such a water tank, the temperature of the water in each compartment is controlled, but if an abnormality occurs in the temperature of the water in each compartment, the efficiency of the air conditioner (specifically, COP: Coefficient Of Performance) is increased. The power consumption may decrease and increase power consumption.

  Then, this invention aims at provision of the water heat source air conditioning system which can prevent the efficiency fall of the air conditioning apparatus which uses water as a heat source.

  The water heat source air conditioning system according to the first aspect of the present invention is a system that improves the efficiency of an air conditioner that uses water as a heat source. The water heat source air conditioning system includes a heating / cooling unit, a water storage unit, a first pump, a second pump, and a control unit. The heating / cooling unit heats or cools water. The water storage unit stores water heated or cooled by the heating / cooling unit. The first pump can supply water heated or cooled by the heating / cooling unit to the storage unit. The second pump can supply heat energy based on water in the water storage unit to the air conditioner. The control unit controls the device group so that the temperature of the water in the water storage unit is within a predetermined range. The device group includes a first pump, a second pump, and a heating / cooling unit. When the temperature of the water in the water storage unit is out of the predetermined range, the control unit determines that an abnormality relating to the device group has occurred, and performs abnormality handling control on the device group based on the determination result.

  According to this water heat source air conditioning system, when the temperature of the water in the water storage part is outside the predetermined range, it is determined that an abnormality relating to the equipment group including the first pump and the second pump has occurred, Abnormal response control is performed. Here, examples of the abnormality related to the device group include an abnormal flow rate such as an excessive flow rate or insufficient flow rate of the second pump, an insufficient capability of the heating / cooling unit and the first pump, and the like. Examples of the abnormality handling control include control for reducing the flow rate of the second pump and control for increasing the flow rate. Thereby, the abnormality of the temperature of the water in a water storage part can be improved or eliminated, Therefore The efficiency fall of the air conditioning apparatus which uses water as a heat source, and the increase in power consumption can be prevented.

  In addition, the 2nd pump which concerns on the said system may supply the heat energy based on the water in a water storage part directly to an air conditioner, for example, may be supplied to an air conditioner via a heat exchanger etc.

  The water heat source air conditioning system according to the invention 2 is the water heat source air conditioning system according to the invention 1, wherein the abnormality response control is performed for at least one of the first pump, the second pump, and the heating / cooling unit included in the device group. This is a control for performing an operation different from the operation when the temperature of the water in the water reservoir is within a predetermined range.

  According to this water heat source air conditioning system, when the control unit determines that an abnormality related to the device group has occurred, it is normal for at least one of the first pump, the second pump, and the heating / cooling unit that are the device group. Control different from the control at the time (that is, when the water temperature is within a predetermined range) is performed. Therefore, when there is something that causes an abnormality in the first pump, the second pump, and the heating / cooling unit, the abnormality can be improved or eliminated.

  A water heat source air conditioning system according to a third aspect of the present invention is the water heat source air conditioning system according to the second aspect, wherein a plurality of second pumps are provided. The abnormality handling control includes at least one of the first control, the second control, and the third control. The first control is control that sequentially reduces the number of second pumps operated when a plurality of second pumps are operating. The second control is a control for decreasing the number of rotations of the operating second pump when one second pump is operating. The third control is a control for operating the heating / cooling unit and the first pump when the heating / cooling unit and the first pump are not operating.

  The first control and the second control are controls for reducing the flow rate of water circulated by the second pump, and the third control is a control for supplying water heated or cooled by the heating / cooling unit to the water storage unit. It can be said that there is. According to this water heat source air conditioning system, when the abnormality related to the generated device group is an abnormality in the flow rate of the second pump (specifically, excessive flow rate), the abnormality is improved by the first control and the second control. When the abnormality related to the generated device group is an abnormality based on insufficient supply of water to the water storage unit, the abnormality is improved or eliminated by the third control.

  The water heat source air conditioning system according to a fourth aspect of the present invention is the water heat source air conditioning system according to the third aspect, wherein the control unit performs the first control, the second control, and the third control in a predetermined order as the abnormality handling control.

  In this water heat source air conditioning system, the content of the abnormality response control to be executed changes in a predetermined order, so that an abnormal flow rate (specifically, excessive flow rate) of the second pump that is often considered as an abnormality related to the device group occurs. If there is, the abnormality is improved or eliminated by the first control and the second control. Moreover, when the abnormality based on the shortage of the supply of water to the water storage part which is often considered as an abnormality related to the device group has occurred, the abnormality is improved or eliminated by the third control. That is, according to this water heat source air conditioning system, since the first control to the third control are sequentially performed as the abnormality handling control, the contents of the abnormality handling control that changes even if the contents of the abnormality regarding the device group are not specified. Any of the above will improve or eliminate the abnormality related to the device group. Therefore, the abnormality of the temperature of the water in the water storage part can be improved or eliminated.

  The water heat source air conditioning system according to a fifth aspect of the present invention is the water heat source air conditioning system according to the fourth aspect of the present invention, wherein the control unit performs the first control, the first control, when the temperature of the water in the water storage unit exceeds a predetermined range during the cooling operation. The abnormality handling control is performed in the order of the second control and the third control.

  As the content of the abnormality related to the device group when the temperature of the water in the water storage unit is equal to or higher than the predetermined range during the cooling operation, the flow rate abnormality of the second pump (specifically, the excessive flow rate) is most often cited. , Abnormalities based on the shortage of water supply to the water reservoir. In this water heat source air-conditioning system, the first control and the second control corresponding to the most likely abnormal flow rate (excessive flow rate) of the second pump when the temperature of the water in the water storage unit exceeds a predetermined range during cooling operation. Control is then performed, followed by third control corresponding to a lack of water supply to the next most likely reservoir. That is, in this water heat source air conditioning system, the corresponding control is performed in the order of the possibility of the abnormality related to the equipment group, so that the abnormality related to the equipment group can be improved or eliminated relatively quickly. An abnormality in the temperature of water can be improved or eliminated.

  A water heat source air conditioning system according to a sixth aspect of the present invention is the water heat source air conditioning system according to the fourth aspect of the present invention, wherein the control unit performs the first control, the first control, when the temperature of the water in the water storage unit falls below a predetermined range during the heating operation. The abnormality handling control is performed in the order of the second control and the third control.

  As the content of the abnormality related to the device group when the temperature of the water in the water storage section is lower than the predetermined range during the heating operation, the flow rate abnormality (specifically, excessive flow rate) of the second pump is most often cited. , Abnormalities based on the shortage of water supply to the water reservoir. In this water heat source air-conditioning system, the first control and the second control corresponding to the most likely abnormal flow rate (excessive flow rate) of the second pump when the temperature of the water in the water storage section falls below a predetermined range during heating operation. Control is then performed, followed by third control corresponding to a lack of water supply to the next most likely reservoir. That is, in this water heat source air conditioning system, the corresponding control is performed in the order of the possibility of the abnormality related to the equipment group, so that the abnormality related to the equipment group can be improved or eliminated relatively quickly. An abnormality in the temperature of water can be improved or eliminated.

  A water heat source air conditioning system according to a seventh aspect is the water heat source air conditioning system according to the second aspect, wherein a plurality of second pumps and heating / cooling units are provided. The abnormality handling control includes at least one of the fourth control, the fifth control, and the sixth control. The fourth control is a control for sequentially reducing the number of operating heating / cooling units and first pumps when a plurality of heating / cooling units and first pumps are operating. The fifth control is a control for increasing the rotational speed of the operating second pump when one second pump is operating. The sixth control is control for sequentially increasing the number of operating second pumps.

  The fourth control can be said to be a control for reducing the operation capacity of the heating / cooling unit and the first pump, and the fifth control and the sixth control can be said to be controls for increasing the flow rate of the water circulated by the second pump. According to this water heat source air conditioning system, when the content of the abnormality related to the generated device group is an excess of the operating capacity of the heating / cooling unit, the abnormality is improved or eliminated by the fourth control, and the generated device group When the content of the abnormality is a flow rate abnormality (specifically, a shortage of flow rate) due to the second pump, the abnormality is improved or eliminated by the fifth control and the sixth control.

  The water heat source air conditioning system according to the eighth aspect of the present invention is the water heat source air conditioning system according to the seventh aspect, wherein the control unit performs the fourth control, the fifth control, and the sixth control in a predetermined order as the abnormality handling control.

  In this water heat source air conditioning system, since the content of the abnormality response control to be executed changes in a predetermined order, an excess of the operating capacity of the heating / cooling unit and the first pump, which is often considered as the content of the abnormality related to the device group, occurs. If so, the abnormality is improved by the fourth control. In addition, when an abnormality in the flow rate of the second pump (specifically, an insufficient flow rate) occurs as the content of the abnormality related to the device group, the abnormality is improved or eliminated by the fifth control or the sixth control. That is, according to this water heat source air conditioning system, since the fourth control to the sixth control are sequentially performed as the abnormality response control, even if the content of the abnormality related to the device group is not specified, the content of the abnormality response control that changes Any of the above will improve or eliminate the abnormality related to the device group. Accordingly, it is possible to improve or eliminate the temperature abnormality of the water in the water reservoir.

  The water heat source air conditioning system according to a ninth aspect of the present invention is the water heat source air conditioning system according to the eighth aspect of the present invention, wherein the control unit performs the fourth control, Abnormality response control is performed in the order of 5 control and 6th control.

  As the content of the abnormality related to the equipment group when the temperature of the water in the water storage unit becomes a predetermined range or less during the cooling operation, the excess of the operating capacity of the heating / cooling unit and the first pump is the best. An abnormal flow rate of two pumps (specifically, a shortage of flow rate) can be mentioned. In this water heat source air conditioning system, the fourth control corresponding to the most probable excess of the operating capacity of the heating and cooling unit and the first pump when the temperature of the water in the water storage unit falls below a predetermined range during cooling operation. Next, the fifth control and the sixth control corresponding to the second flow rate abnormality (low flow rate) of the second pump, which is most likely next, are performed. That is, in this water heat source air conditioning system, the corresponding control is performed in the order of the possibility of the abnormality related to the equipment group, so that the abnormality related to the equipment group can be improved or eliminated relatively quickly. An abnormality in the temperature of water can be improved or eliminated.

  The water heat source air conditioning system according to a tenth aspect of the present invention is the water heat source air conditioning system according to the eighth aspect of the present invention, wherein the control unit performs the fourth control, the fourth control, when the temperature of the water in the water storage unit becomes a predetermined range or more during the heating operation. Abnormality response control is performed in the order of 5 control and 6th control.

  As the contents of the abnormality related to the device group when the temperature of the water in the water storage unit becomes equal to or higher than a predetermined range during the heating operation, the excess of the operating capacity of the heating / cooling unit and the first pump is the best. An abnormal flow rate of the pump (specifically, insufficient flow rate) can be mentioned. In this water heat source air conditioning system, the fourth control corresponding to the most likely excess of the operating capacity of the heating / cooling unit and the first pump when the temperature of the water in the water storage unit exceeds a predetermined range during heating operation. Next, the fifth control and the sixth control corresponding to the second flow rate abnormality (low flow rate) of the second pump, which is most likely next, are performed. That is, in this water heat source air conditioning system, the corresponding control is performed in the order of the possibility of the abnormality related to the equipment group, so that the abnormality related to the equipment group can be improved or eliminated relatively quickly. An abnormality in the temperature of water can be improved or eliminated.

  The water heat source air conditioning system according to the eleventh aspect of the present invention is the water heat source air conditioning system according to any of the first to tenth aspects of the present invention, further comprising an output unit. The output unit outputs at least one of the determination result, the control content information, and the result information to the outside. The control content information is information indicating the content of the abnormality handling control. The result information is information including the presence / absence and degree of abnormality after the abnormality handling control is performed.

  As the output destination of the determination result by the output unit, the control content information and the result information, a remote controller for remotely controlling the water heat source air conditioning system, an external terminal to which the system is connected via a communication network, and the like can be cited. . Therefore, according to this water heat source air conditioning system, the judgment result output to the remote controller or the external terminal by the output unit, the control content information and the result information, the user of the system or the operator of the external terminal can use the water heat source air conditioning system. It is possible to know the presence / absence of an abnormality, the contents of the abnormality, the state of the system after the abnormality response control is performed, and the like. For this reason, if the abnormality related to the device group has not been improved or solved, the user of the system or the operator of the external terminal can take a control other than the control performed so far as a measure. In addition, if the result information is information indicating that the abnormality related to the device group has been improved or eliminated, the user or the operator of the external terminal can detect the abnormality related to the device group that has occurred based on the result information and the control content information. The contents of can be specified.

  A water heat source air conditioning system according to a twelfth aspect of the present invention is the water heat source air conditioning system according to any of the first to eleventh aspects of the present invention, wherein the water storage section is divided into a plurality of compartments, and water is supplied to the plurality of compartments in order. By flowing, a temperature difference is generated for each section. A 1st pump supplies the water from a heating-cooling part to the division with the lowest temperature among water storage parts at the time of air_conditionaing | cooling operation. Moreover, a 1st pump supplies the water from a heating-cooling part to the division with the highest temperature among water storage parts at the time of heating operation.

  Here, the heating / cooling unit cools water during the cooling operation and heats the water during the heating operation. For this reason, regardless of whether the cooling operation or the heating operation is performed, the temperature in the water storage section is low in the lower compartment, and the temperature is higher in the higher compartment.

  The water heat source air conditioning system according to a thirteenth aspect of the present invention is the water heat source air conditioning system according to the twelfth aspect of the present invention, wherein the control unit is configured so that the temperature in the lowest temperature section of the water storage unit is within a predetermined range during the cooling operation. In addition, the device group is controlled. A control part controls an apparatus group so that the temperature in the division with the highest temperature among water storage parts may be in a predetermined range at the time of heating operation.

  In this water heat source air conditioning system, during cooling operation, the abnormality of the equipment group is determined based on the temperature of water in the lowest temperature section, and in heating operation, the equipment temperature is determined based on the temperature of water in the highest temperature section. An abnormal judgment regarding the group is made.

  According to the water heat source air conditioning system according to the first aspect of the present invention, it is possible to improve or eliminate the temperature abnormality of the water in the water storage section, and thus to prevent a reduction in efficiency and an increase in power consumption of an air conditioner using water as a heat source.

  According to the water heat source air-conditioning system according to the second aspect of the present invention, when there is something that causes an abnormality in the first pump, the second pump, and the heating / cooling unit that are the device group, the abnormality can be improved or eliminated. it can.

  According to the water heat source air conditioning system according to the third aspect of the present invention, when the abnormality related to the generated device group is an abnormality in the flow rate of the second pump (specifically, excessive flow rate), the abnormality is caused by the first control and the second control. Is improved, and when the abnormality related to the generated device group is an abnormality based on insufficient supply of water to the water storage unit, the abnormality is improved or eliminated by the third control.

  According to the water heat source air conditioning system according to the fourth aspect of the present invention, the first control to the third control are sequentially performed as the abnormality response control. Therefore, even if the content of the abnormality related to the device group is not specified, any of the contents of the abnormality response control that changes Depending on the situation, the abnormality related to the device group is improved or eliminated. Therefore, the abnormality of the temperature of the water in the water storage part can be improved or eliminated.

  According to the water heat source air conditioning system according to the fifth and sixth aspects of the invention, since the corresponding control is performed in the descending order of the possibility of the abnormality related to the device group, the abnormality related to the device group can be improved or eliminated relatively quickly. Therefore, it is possible to improve or eliminate the abnormality in the temperature of the water in the water storage section.

  According to the water heat source air conditioning system according to the seventh aspect of the present invention, when the content of the abnormality relating to the generated device group is an excess of the operating capacity of the heating / cooling unit and the first pump, the abnormality is improved or eliminated by the fourth control. In the case where the content of the abnormality related to the generated device group is an abnormal flow rate by the second pump (specifically, insufficient flow rate), the abnormalities are improved or eliminated by the fifth control and the sixth control.

  According to the water heat source air conditioning system according to the eighth aspect of the invention, the fourth control to the sixth control are sequentially performed as the abnormality handling control, so that even if the contents of the abnormality relating to the device group are not specified, any of the contents of the abnormality handling control that changes Depending on the situation, the abnormality related to the device group is improved or eliminated. Therefore, the abnormality of the temperature of the water in the water storage part can be improved or eliminated.

  According to the water heat source air conditioning system according to the ninth and tenth aspects of the present invention, since the corresponding control is performed in the order of the possibility of the abnormality related to the device group, the abnormality related to the device group can be improved or eliminated relatively quickly. Therefore, it is possible to improve or eliminate the abnormality in the temperature of the water in the water storage section.

  According to the water heat source air conditioning system according to the eleventh aspect of the present invention, when the abnormality related to the device group has not been improved or eliminated, the system user or the operator of the external terminal performs control different from the control performed so far. It can be taken as a measure. In addition, if the result information is information indicating that the abnormality related to the device group has been improved or eliminated, the user or the operator of the external terminal can detect the abnormality related to the device group that has occurred based on the result information and the control content information. The contents of can be specified.

  According to the water heat source air conditioning system according to the twelfth aspect of the present invention, regardless of whether the cooling operation or the heating operation is performed, the temperature in the water storage section is low in the lower section and higher in the higher section.

  According to the water heat source air-conditioning system of the thirteenth aspect, during cooling operation, an abnormality regarding the equipment group is determined based on the temperature of water in the compartment having the lowest temperature, and during heating operation, the water in the compartment having the highest temperature is obtained. The abnormality of the device group is determined based on the temperature of the device.

The figure which shows schematically the structure of the water-heat-source air conditioning system which concerns on this embodiment. The figure which shows typically the apparatus connected to the control part of the water heat source air conditioning system which concerns on this embodiment, and a control part. Explanatory drawing of the cooling cycle of the water-source air-conditioning system which concerns on this embodiment. The graph which shows the temperature in each division of a water tank in case the water-source air conditioning system which concerns on this embodiment performs a cooling cycle. Explanatory drawing of the heating cycle of the water-source air-conditioning system which concerns on this embodiment. The graph which shows the temperature in each division of a water tank in case the water-heat-source air-conditioning system which concerns on this embodiment performs a heating cycle. The example of a screen display of a judgment result, control content information, and result information. The flowchart which shows the flow of the whole operation | movement of the water-heat-source air conditioning system which concerns on this embodiment. The flowchart which shows the flow of the whole operation | movement of the water-heat-source air conditioning system which concerns on this embodiment. The subroutine which shows the abnormality response control 1 which concerns on FIG. The subroutine which shows the abnormality response control 2 which concerns on FIG.

  Hereinafter, the water heat source air conditioning system according to the present invention will be described in detail with reference to the drawings.

(1) Overview FIG. 1 is a configuration diagram of a water heat source air conditioning system 1 according to the present embodiment. The water heat source air conditioning system 1 in FIG. 1 is a system for driving air conditioners 2a and 2b that use water as a heat source using the water, and the efficiency (specifically, COP) of the air conditioners 2a and 2b. : Coefficient of Performance) can be improved. The water heat source air conditioning system 1 mainly receives the primary side circuit 1a that stores water as the heat source of the air conditioners 2a and 2b, and receives the thermal energy of the stored water from the primary side circuit 1a, and the air conditioners 2a and 2b. And a secondary circuit 1b for sending to

Here, the air conditioners 2a and 2b can perform a cooling operation and a heating operation, and are installed on the outdoor units 21a and 21b installed outdoors and indoor walls or ceilings to be air-conditioned spaces. The indoor units 23a and 23b are respectively provided. Each outdoor unit 21a, 21b has outdoor unit water heat exchangers 22a, 22b. The outdoor unit water heat exchangers 22a and 22b exchange heat between water flowing in the secondary circuit 1b and refrigerant flowing between the outdoor units 21a and 21b and the indoor units 23a and 23b. Examples of the refrigerant flowing between the outdoor units 21a and 21b and the indoor units 23a and 23b include HFC-410A, which is a kind of HFC refrigerant, and CO ₂ . In addition, the outdoor units 21a and 21b have a compressor, an outdoor fan (both not shown), and the like. The indoor units 23a and 23b have indoor fans (not shown) and the like, and can supply cold air (in the case of cooling operation) or warm air (in the case of heating operation) to the room.

  The water source air conditioning system 1 according to the present embodiment performs a cooling cycle when the air conditioners 2a and 2b perform a cooling operation, and performs a heating cycle when the air conditioners 2a and 2b perform a heating operation. The cooling cycle and the heating cycle will be described in “(3-1) Cooling cycle” and “(3-2) Heating cycle” in “(3) Operation”. In particular, the water heat source air conditioning system 1 according to the present embodiment includes a water tank 4 (corresponding to a water storage unit) that stores water serving as a heat source for the air conditioners 2a and 2b in the primary circuit 1a. The water heat source air conditioning system 1 adjusts the heat energy supplied to the air conditioners 2a and 2b by controlling the temperature of the water in the water tank 4, thereby realizing an improvement in the efficiency of the air conditioners 2a and 2b. Yes. Therefore, when the temperature of the water in the water tank 4 becomes abnormal, this abnormality affects the thermal energy supplied to the air conditioners 2a and 2b, and as a result, the efficiency of the air conditioners 2a and 2b is reduced. Then, when the temperature of the water in the water tank 4 becomes abnormal, the water heat source air conditioning system 1 performs control to eliminate or improve this abnormality on the primary side circuit 1a, so that the air conditioners 2a and 2b. To prevent a decrease in efficiency.

  In addition, each apparatus which comprises the primary side circuit 1a and the secondary side circuit 1b is installed in the space different from the air-conditioning object space in which the indoor units 23a and 23b are installed. Moreover, in FIG. 1 etc., the case where the number of installed air conditioners 2a and 2b is two is shown as an example, but the number of installed air conditioners 2a and 2b is not limited to this. Also good.

(2) Configuration Hereinafter, a detailed configuration of the water heat source air conditioning system 1 according to the present embodiment will be described.

  As shown in FIG. 1, the water heat source air conditioning system 1 includes a chiller 3 (corresponding to a heating and cooling unit), a water tank 4, a first pump 5, and a second pump 7 as devices constituting the primary circuit 1a. A heat exchanger 10 and a third pump 11 are provided as devices constituting the secondary circuit 1b. Furthermore, the water heat source air conditioning system 1 includes a control unit 15 and an output unit 16, as shown in FIG.

  The chiller 3, the water tank 4 and the first pump 5 of the primary circuit 1a are connected in a ring shape by pipes L1 and L2. The heat exchanger 10 and the third pump 11 of the secondary side circuit 1b are connected to each other by pipes L4, L5, and L6, and are also directly connected to the air conditioners 2a and 2b.

(2-1) Chiller The chiller 3 is for heating or cooling the water used as the heat source of the air conditioners 2a and 2b. The water heated or cooled by the chiller 3 is stored in the water tank 4 through the pipe L1 or the pipe L2. The water heating operation and the cooling operation by the chiller 3 are controlled by the control unit 15.

  1, 3, and 5, one chiller 3 is illustrated, but a plurality of chillers 3 according to the present embodiment are installed in parallel. Specifically, the plurality of chillers 3 are connected to the pipes L1 and L2 in parallel with each other. On / off of each chiller 3 is controlled by the control unit 15, and the water heated or cooled by each chiller 3 is supplied to the water tank 4 via the pipe L <b> 1 or the pipe L <b> 2.

(2-2) Water Tank The water tank 4 is for storing the water heated or cooled by the chiller 3. That is, the water tank 4 is for storing heat sources of the air conditioners 2a and 2b. As an example, the water tank 4 is not a sealed type but has a rectangular parallelepiped shape whose upper side is open. For example, the water tank 4 has a depth of 3 m, a width of 10 m, and a depth of 20 m.

  In particular, as shown in FIG. 1, the water tank 4 according to the present embodiment is divided into a plurality of compartments. Specifically, the water tank 4 according to the present embodiment is divided into four sections, a high temperature side section 41, an intermediate high temperature side section 42, an intermediate low temperature side section 43, and a low temperature side section 44. Inside the aquarium 4, in the order of the high temperature side section 41, the medium and high temperature side section 42, the medium and low temperature side section 43, and the low temperature side section 44 (or the low temperature side section 44, the medium and low temperature side section 43, the medium and high temperature side section 42, Water flows in the order of the high temperature side section 41), and as a result, a temperature difference as shown in FIGS. 4 and 6, the horizontal axis represents the type of the partition, and the vertical axis represents the temperature in the partition, and the water temperature for each partition in the water tank 4 is represented. As shown in FIGS. 4 and 6, the temperature of water in the high temperature side section 41 is the highest, and conversely, the temperature of water in the low temperature side section 44 is the lowest. That is, as shown in FIGS. 4 and 6, the temperature in the water tank 4 is continuously lowered from the high temperature side section 41 to the low temperature side section 44, but here, the temperature per intermediate point in each section is , “Temperature of each section”. As an example, the temperature of water in each compartment is 30 ° C., 26.7 ° C., 23.3 ° C. in the order of the high temperature side compartment 41, the medium high temperature side compartment 42, the medium low temperature side compartment 43, and the low temperature side compartment 44, respectively. 20 ° C. The water flow in the water tank 4 is generated by the difference in flow rate between the first pump 5 and the second pump 7 described later.

  Although not shown, a temperature sensor for detecting the temperature of water in the water tank 4 is provided inside the water tank 4 and in the vicinity of the center of each of the sections 41 to 44. In particular, a temperature sensor is provided in each of a portion near the center in the low temperature side section 44 and a portion in the vicinity of the center in the high temperature side section 41. The temperature of the water detected by the temperature sensor is taken in by the control unit 15 and used when the control unit 15 grasps whether or not an abnormality has occurred in the primary circuit 1a of the water heat source air conditioning system 1.

(2-3) 1st pump The 1st pump 5 is connected on piping L1 which connects the chiller 3 and the water tank 4. As shown in FIG. The first pump 5 can supply the water heated or cooled by the chiller 3 to the water tank 4 and always operates in synchronization with the chiller 3. Specifically, during the cooling cycle, the first pump 5 sends the water cooled by the chiller 3 to the low temperature side section 44 of the water tank 4 through the pipe L1, and supplies the water in the high temperature side section 41 through the pipe L2. To the chiller 3 (FIG. 3). On the contrary, during the heating cycle, the first pump 5 sends the water heated by the chiller 3 to the high temperature side section 41 of the water tank 4 through the pipe L2, and the water in the low temperature side section 44 through the pipe L1. Return to chiller 3 (FIG. 5). Note that the four-way switching connected to the outlet side of the first pump 5 determines whether the first pump 5 supplies water to the high temperature side section 41 or the low temperature side section 44 during the cooling cycle and the heating cycle. It is switched by valve 6.

  As such a first pump 5, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a motor (not shown) for the first pump 5 can be adopted. The motor for the first pump 5 can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), and thereby the capacity of the first pump 5 can be controlled.

(2-4) 2nd pump The 2nd pump 7 is connected on the piping L3 which connects the low temperature side division 44 of the water tank 4, the heat exchanger 10, and the high temperature side division 41. As shown in FIG. The second pump 7 can supply heat energy based on the water in the water tank 4 to the air conditioners 2a and 2b. Specifically, the second pump 7 sends water in the water tank 4 from the low temperature side section 44 via the heat exchanger 10 to the high temperature side section 41 during the cooling cycle (FIG. 3), and during the heating cycle, The water in the water tank 4 can be sent from the high temperature side section 41 to the low temperature side section 44 via the heat exchanger 10 (FIG. 5). Whether the second pump 7 flows the water in the water tank 4 from the low temperature side section 44 to the heat exchanger 10 or from the high temperature side section 41 to the heat exchanger 10 is determined as to the outlet of the second pump 7. It is switched by a four-way switching valve 8 connected to the side.

  As such a second pump 7, similarly to the first pump 5, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a motor (not shown) for the second pump 7 is adopted. can do. The motor for the second pump 7 can change the rotation speed (that is, the operating frequency) by an inverter device (not shown), and thereby the capacity of the second pump 7 can be controlled.

  In the present embodiment, although not shown, a plurality of second pumps 7 are provided, and the plurality of second pumps 7 are connected in parallel to each other. Controls such as on and off of the individual second pumps 7 are controlled by the control unit 15, and each of the plurality of second pumps 7 sucks water from the water tank 4 and sends it to the heat exchanger 10. The water after the heat exchange can be returned to the water tank 4 again.

  Hereinafter, for convenience of explanation, the first pump 5, the second pump 7, and the chiller 3 included in the primary circuit 1a are collectively referred to as a device group 9 (FIG. 2).

(2-5) Heat exchanger The heat exchanger 10 flows on the water from the water tank 4 flowing on the pipe L3 of the primary circuit 1a and on the pipes L4, L5, L6 of the secondary circuit 1b. It is a so-called water-water heat exchanger that exchanges heat with water. Since the water on the secondary circuit 1b side after heat exchange in the heat exchanger 10 is supplied to the air conditioners 2a and 2b, the heat exchanger 10 functions as a heat source for the air conditioners 2a and 2b. .

(2-6) Third Pump The third pump 11 is connected between the pipe L5 and the pipe L6 directly connected to the air conditioners 2a and 2b, and generates the water flow in the secondary circuit 1b. To do. Specifically, during the cooling cycle, the third pump 11 is switched from the outdoor units 21a and 21b to the pipe L6, the third pump 11, the pipe L5, the heat exchanger 10, and the pipe by the flow path switching operation by the four-way switching valve 12. Water is circulated so that the water flows again to the outdoor units 21a and 21b via L4 (FIG. 3). Further, during the heating cycle, the third pump 11 is switched from the outdoor units 21a and 21b through the pipe L4, the heat exchanger 10, the pipe L5, the third pump 11, and the pipe L6 by the flow path switching operation by the four-way switching valve 12. Then, water is circulated so that the outdoor units 21a and 21b and the water flow again (FIG. 5). In addition, it is switched by the four-way switching valve 12 connected to the outflow side of the 3rd pump 11 whether the 3rd pump 11 flows water into which piping L4, L6 from the outdoor units 21a and 21b.

  As such a third pump 11, like the first pump 5 and the second pump 7, a centrifugal or positive displacement pump element (not shown) is driven by a motor (not shown) for the third pump 11. Can be employed. The motor for the third pump 11 can vary its rotation speed (that is, operating frequency) by an inverter device (not shown), and thereby the capacity of the third pump 11 can be controlled.

(2-7) Control Unit The control unit 15 is a microcomputer composed of a memory such as RAM and ROM and a CPU, and as shown in FIG. 2, the device group 9 (specifically, as shown in FIG. 2). The chiller 3, the first pump 5 and the second pump 7) the four-way switching valves 6, 8, 12 of the primary circuit 1a and the secondary circuit 1b, and the third pump 11 of the secondary circuit 1b, Connected and controls each connected device. For example, the control unit 15 determines the temperature of water heated or cooled by the chiller 3, controls on / off of the chiller 3, and sets a temperature that is a reference for the high temperature side section 41 or the low temperature side section 44 in the water tank 4. (Hereinafter referred to as a set value), the flow path switching control of the four-way switching valves 6, 8, and 12 for each cooling cycle and heating cycle is performed. The set value is used as a target value of the water temperature when the cooling cycle and the heating cycle are started. In addition, the control unit 15 performs on / off of each of the first pump 5, the second pump 7, and the third pump 11, rotation speed control, and the like.

  In particular, the control unit 15 according to the present embodiment is configured so that the temperature of the water in the water tank 4 (specifically, the temperature in the low temperature side section 44 or the high temperature side section 41) is within a predetermined range during the cooling cycle and the heating cycle. Thus, the device group 9 is controlled. And the control part 15 judges that the abnormality regarding the equipment group 9 has arisen when the temperature of the water of the water tank 4 becomes out of the predetermined range, and responds to the equipment group 9 based on the judgment result. Take control.

-Predetermined range-
Here, the predetermined range will be described. The upper limit value and the lower limit value of the predetermined range are values that are increased or decreased by a predetermined width with respect to the set values in the high temperature side section 41 or the low temperature side section 44.

  For example, as shown in FIGS. 4 and 6, in the low temperature side section 44, if the set value is “20 ° C.”, the predetermined range is “15 to 25 ° C.”. In this case, the upper limit value is “25 ° C.”. “, The lower limit is“ 15 ° C. ”. In the high temperature side section 41, if the set value is “30 ° C.”, the predetermined range is “25 to 35 ° C.”. In this case, the upper limit value is “35 ° C.” and the lower limit value is “25 ° C.”. It becomes. Therefore, for example, in the cooling cycle, if the temperature of the water in the low temperature side section 44 is “23 ° C.”, the control unit 15 determines that the temperature “23 ° C.” is a predetermined range “15-25 ° C.” in the low temperature side section 44. Therefore, it is determined that no abnormality relating to the device group 9 has occurred. However, if the temperature of the water in the low temperature side section 44 is “31 ° C.”, the controller 15 determines that the temperature “31 ° C.” is outside the predetermined range “15 to 25 ° C.” in the low temperature side section 44. It is determined that an abnormality related to the device group 9 has occurred.

  In the present embodiment, when the water heat source air conditioning system 1 is performing a cooling cycle, the predetermined range A in FIG. 4 is used as the predetermined range when determining whether or not an abnormality has occurred. The predetermined range A is a temperature range of water on the low temperature side section 44 side during the cooling cycle. Therefore, the detection result of a temperature sensor (not shown) provided in the low temperature side section 44 is used as the temperature of water used when determining whether or not it is within the predetermined range A. Conversely, when the water heat source air conditioning system 1 is performing a heating cycle, the predetermined range B in FIG. 6 is used as the predetermined range. The predetermined range B is a temperature range of water on the high temperature side section 41 side during the heating cycle. Accordingly, the detection result of a temperature sensor (not shown) provided in the high temperature side section 41 is used as the temperature of water used when determining whether or not it is within the predetermined range B.

-Anomaly response control-
Next, the abnormality handling control will be specifically described. The abnormality response control is performed when the temperature of the water supplied to the water tank 4 is within the predetermined ranges A and B with respect to at least one of the first pump 5, the second pump 7, and the chiller 3 included in the device group 9. This control is different from the operation. In other words, the abnormality handling control is the first pump when it is determined that an abnormality has occurred in an operation different from the operation performed until it is determined that an abnormality related to the device group 9 has occurred (that is, at the normal time). This control is performed by 5 etc.

Specifically, the abnormality handling control includes the following first control to sixth control.
(I) When the number of operating second pumps 7 is plural, the first control for sequentially reducing the number of operating second pumps 7 (II) When the number of operating second pumps 7 is 1, operate The second control (III) for reducing the rotational speed of the second pump 7 that is in operation When the chiller 3 and the first pump 5 are not operating, the third control (IV) that operates the chiller 3 and the first pump 5 that are not operating ) When there are a plurality of operating units of the chiller 3 and the first pump 5, and when the operating number of the fourth control (V) second pumps 7 is decreased, the operating unit of the chiller 3 and the first pump 5 is sequentially decreased. , Fifth control (VI) for increasing the number of rotations of the second pump 7 being operated Sixth control for sequentially increasing the number of operating the plurality of second pumps 7

  The first control and the second control are effective when a flow rate abnormality in which the flow rate of the second pump 7 is excessive occurs as an abnormality related to the device group 9. By performing the first control and the second control, the flow rate of the water circulated by the second pump 7 decreases, so that the above abnormal flow rate (that is, excessive flow rate) can be improved or eliminated. The third control is effective when insufficient supply of water from the chiller 3 to the water tank 4 occurs as an abnormality related to the device group 9. By performing the third control, the chiller 3 and the first pump 5 that have not been operated until then are driven, and the water heated or cooled by the chiller 3 is supplied to the water tank 4. The shortage can be improved or eliminated. In the third control, when the chiller 3 and the first pump 5 are already driven, for example, the rotation speed of the first pump 5 is increased or the chiller 3 is increased in order to increase the amount of water supplied to the water tank 4. You may increase your driving ability.

  The fourth control is effective when an excessive operating capacity of the chiller 3 and the first pump 5 occurs as an abnormality related to the device group 9. By performing the fourth control, the heating capacity or cooling capacity of water by the chiller 3 and the operating capacity of the first pump 5 are suppressed, so that the excess of the operating capacity of the chiller 3 and the first pump 5 is improved or eliminated. can do. In the fourth control, the number of operating chillers 3 and first pumps 5 is reduced to one. However, the water heating capacity or cooling capacity of the chiller 3 is further suppressed, or the operating capacity of the first pump 5 is lowered. If it is desired to reduce the flow rate of the water supplied to the aquarium 4, the operating capacity of the operating chiller 3 itself may be lowered, or the rotational speed of the first pump 5 may be reduced. The fifth control and the sixth control are effective when an abnormality in the flow rate of the second pump 7 (specifically, an insufficient flow rate) occurs as an abnormality related to the device group 9. By performing the fifth control and the sixth control, the flow rate of the water circulated by the second pump 7 increases, so that the abnormal flow rate (insufficient flow rate) of the second pump 7 can be solved.

  In the present embodiment, the first control to the third control described above perform the first control and the second control when the temperature of the water in the low temperature side section 44 exceeds the upper limit value of the predetermined range A during the cooling cycle. Control is performed in the order of the third control. Further, the first control to the third control are performed in the order of the first control, the second control, and the third control when the temperature of the water in the high temperature side section 41 falls below the lower limit value of the predetermined range B during the heating cycle. Done. Each control is performed for a predetermined time. An example of the predetermined time is 10 minutes.

  In the present embodiment, the above-described fourth control to sixth control are the fourth control and the fifth control when the temperature of the water in the low temperature side section 44 falls below the lower limit value of the predetermined range A during the cooling cycle. Control is performed in the order of the sixth control. The fourth control to the sixth control are performed in the order of the fourth control, the fifth control, and the sixth control when the temperature of the water in the high temperature side section 41 exceeds the upper limit value of the predetermined range B during the heating cycle. Done. Each control is performed for a predetermined time. An example of the predetermined time is 10 minutes.

  As described above, the control unit 15 performs the first control to the third control or the fourth control to the sixth control for a predetermined time for each control, and while performing these controls, the water in the water tank 4 is controlled. The temperature is monitored to determine whether or not the abnormality related to the device group 9 has been improved or eliminated. That is, when the cooling cycle is performed during the above-described abnormality response control, the control unit 15 obtains a detection result from a temperature sensor (not shown) in the low temperature side section 44, for example, every 5 minutes. Acquire and check whether the detection result is within a predetermined range A. In addition, the control unit 15 obtains a detection result from a temperature sensor (not shown) in the high temperature side section 41, for example, every 5 minutes when the heating cycle is performed during the abnormality response control described above. Acquire and check whether the detection result is within a predetermined range B. If the detection result is within the predetermined ranges A and B, the control unit 15 determines that the temperature of the water in the water tank 4 has become normal because the abnormality related to the device group 9 that has occurred has been resolved, and It is determined that it is no longer necessary to perform the control that was planned to be performed, and the abnormality response control currently being performed is continued as it is. For example, when the abnormality related to the device group 9 is resolved by performing the second control for 10 minutes, the control unit 15 does not perform the third control that was scheduled to be performed next, but performs the second control. Perform a cooling or heating cycle at. As described above, the fact that the temperature of the water in the water tank 4 has been improved or eliminated by performing the abnormality handling control means that the contents of the abnormality relating to the device group 9 that has actually occurred and the abnormality handling control actually performed. The content corresponds to the content, and the content of the abnormality related to the device group 9 can be specified.

  On the contrary, even if the first control to the third control or the fourth control to the sixth control is performed, if the detection result is still outside the predetermined ranges A and B, the control unit 15 does not start the abnormality handling control. And the current detection result are compared to determine which value is close to the predetermined range A or B. If the current detection result is closer to the predetermined ranges A and B than the detection result before the start of the abnormality handling control, the control unit 15 indicates that the abnormality related to the device group 9 is being improved by the current control. The current control is continued for a predetermined time. For example, if the abnormality related to the device group 9 is being improved by the second control, the second control is performed continuously for 10 minutes, for example. On the other hand, the detection result before starting the abnormality handling control and the current detection result are almost the same value, or the detection result before starting the abnormality handling control is within the predetermined ranges A and B than the current detection result. If close, the control unit 15 determines that the current control cannot improve the abnormality related to the device group 9, and the first control to the third control, the fourth control scheduled to be performed next. -6th control is performed. For example, when the temperature of the water in the water tank 4 does not improve even after the second control is performed for a predetermined time, the control unit 15 determines that the abnormality related to the device group 9 is not improved, and performs the abnormality handling control. Is switched from the second control to the third control. Moreover, although the control part 15 performed all 1st control-3rd control or all 4th control-6th control, abnormality in the temperature of the water in the water tank 4 has not been improved, and a detection result is still predetermined. If it is outside the ranges A and B, it is determined that the temperature abnormality in the water tank 4 is caused by something other than the device group 9, and the normal control is returned. In particular, the abnormality response control of the first to third control and the fourth control to the sixth control is performed, but the detection result is further away from the upper limit value and the lower limit value of the predetermined ranges A and B than before the start of the abnormality response control. When it becomes the value, the control unit 15 determines that the degree of abnormality that has occurred has deteriorated due to the abnormality handling control, and immediately returns to the control performed before the abnormality handling control was started.

  In summary, when the temperature of the water in the low temperature side section 44 exceeds the upper limit value of the predetermined range A during the cooling cycle, and the water temperature in the high temperature side section 41 is the lower limit value of the predetermined range B during the heating cycle. If the value is less than, the abnormality handling control is performed in the order of the first control, the second control, and the third control. Further, the control unit 15 sets the temperature of the water in the low temperature side compartment 44 below the lower limit value of the predetermined range A during the cooling cycle and the temperature of the water in the high temperature side compartment 41 at the upper limit value of the predetermined range B during the heating cycle. When it exceeds, abnormality response control is performed in the order of the fourth control, the fifth control, and the sixth control. And if the temperature of the water of the water tank 4 will be in the predetermined range A and B during each control, the control part 15 will judge that the abnormality regarding the equipment group 9 has been eliminated, and the abnormality response control when the abnormality has been eliminated. To continue. Conversely, if the temperature of the water in the water tank 4 is still outside the predetermined ranges A and B during each control, the control unit 15 determines the temperature in the sections 41 and 44 immediately before performing the abnormality handling control and the current section 41. , 44 is compared. As a result of the comparison, if it is determined that the abnormality related to the device group 9 has been improved, the control unit 15 continues the abnormality handling control that has been currently performed, and the abnormality related to the device group 9 has not been improved. If it is determined, the next abnormality handling control is performed. If the temperature of the water in the aquarium 4 is still outside the predetermined ranges A and B even after performing all of the planned abnormality handling controls, the control unit 15 determines that the cause of the abnormal temperature of the water in the aquarium 4 is the device group 9 It is determined that there is something other than that, and the normal control is restored.

  Moreover, the control part 15 is also connected with the output part 16, as shown in FIG. The control unit 15 generates various types of information (described later) output to the outside by the output unit 16 based on the result of determining that there is an abnormality related to the device group 9 and the content of the abnormality handling control.

(2-8) Output unit The output unit 16 includes the determination result by the control unit 15, the control content information indicating the content of the abnormality response control, and the result information including the presence / absence and degree of abnormality after the abnormality response control is performed Output to the outside. As an output destination from which the output unit 16 outputs various types of information, a remote controller for remotely operating the air conditioners 2a and 2b, an outside in a center to which the control unit 15 or a remote controller is connected via a communication network. A terminal etc. are mentioned.

  Here, in the following, a case where various kinds of information are output to the external terminal in the center by the output unit 16 is taken as an example. FIG. 7 shows an example of a screen on which various types of information output by the output unit 16 are displayed on a display unit (not shown) of an external terminal in the center. The display screen P1 in FIG. 7 includes a determination result Inf1, control content information Inf2, and result information Inf3. The determination result Inf1 is expressed as “present” indicating that it is determined that there is an abnormality with respect to the device group 9. In the control content information Inf2, the first control is executed for 10 minutes, and then the second control is performed for 10 minutes. It is shown that it was executed. In the result information Inf3, the abnormality related to the device group 9 after the abnormality handling control is “no”, that is, the abnormality related to the device group 9 is eliminated by the abnormality handling control, so that the temperature of the water in the water tank 4 becomes normal. The effect is expressed. In other words, after the control unit 15 determines that an abnormality related to the device group 9 has occurred, the information Inf1 to Inf3 is subjected to the first control and the second control for 10 minutes each as an abnormality handling control. 9 indicates that the abnormality related to 9 has been resolved. In particular, in the present embodiment, the first control, the second control, and the third control are performed in this order as the abnormality handling control. Therefore, the operator of the external terminal can determine from the contents of the control content information Inf2 and the result information Inf3, It can be specified that the abnormal flow rate (excessive flow rate) by the second pump 7 is the content of the abnormalities related to the device group 9.

  Note that the screen example p1 in FIG. 7 shows that the abnormality has been resolved, but the abnormality in the temperature of the water in the water tank 4 has not been resolved, but is being improved. Even when the temperature is being improved or when the temperature abnormality in the water tank 4 is not improved or eliminated, the output unit 16 outputs the determination result Inf1, the control content information Inf2, and the result information Inf3 to the outside. In this case, the presence or absence of abnormality after the control of the result information Inf3 is displayed as “present”, and the degree of abnormality related to the device group 9 or the degree of abnormality of the temperature of water in the water tank 4 is “slightly improved”. A message such as “” or “Deteriorated” is displayed.

(3) Operation (3-1) Cooling cycle Next, when the water heat source air conditioning system 1 performs the cooling cycle, the flow of water in the primary side circuit 1a and the secondary side circuit 1b and the operation of each device are simply described. Explained.

  First, when an instruction to start the cooling operation of the air conditioners 2a and 2b is made by the user using a remote controller (not shown) or the like, the control unit 15 acquires an instruction to start the cooling operation from the remote controller. Then, the four-way switching valves 6, 8, and 12 switch the flow paths as shown by the dotted lines in FIG. 1 by the flow-path switching control of the four-way switching valves 6, 8, and 12 by the control unit 15. Specifically, the four-way switching valve 6 communicates the outlet of the first pump 5 and the low temperature side section 44 of the water tank 4 and communicates the chiller 3 and the inlet of the first pump 5. The four-way switching valve 8 communicates the outlet of the second pump 7 and the high temperature side section 41 of the water tank 4, and communicates the heat exchanger 10 and the inlet of the second pump 7. The four-way switching valve 12 communicates the outlet of the third pump 11 and the heat exchanger 10 and also has outdoor units 21a and 21b (specifically, outdoor unit water heat exchangers 22a and 21b, 22b) communicates with the inlet of the third pump 11.

  Next, drive control of the pumps 5, 7, 11 and the chiller 3 is performed by the control unit 15, and in the water heat source air conditioning system 1, water circulates as indicated by arrows in FIG. 3. Specifically, in the primary side circuit 1 a, water from the high temperature side section 41 of the water tank 4 flows into the chiller 3, is cooled by the chiller 3, and then flows into the low temperature side section 44 of the water tank 4. Further, the water in the low temperature side section 44 flows into the pipe L3 by the second pump 7 and absorbs heat from the water on the secondary side circuit 1b side in the heat exchanger 10, and then warms, and then the high temperature side section 41. Returned to At this time, in the water tank 4, the flow of water from the high temperature side section 41 to the low temperature side section 44 or the reverse flow of water is formed. The temperature of the water in the water tank 4 is controlled by the control of the device group 9 by the control unit 15 so that the temperature in the low temperature side section 44 is within the predetermined range A shown in FIG. 4 during the cooling cycle.

  In the secondary circuit 1b, water cooled by releasing heat into the water on the primary circuit 1a side in the heat exchanger 10 flows into the outdoor units 21a and 21b, and the outdoor unit water heat exchangers 22a and 22b. Heat exchange with refrigerant. Thereby, the refrigerant condenses on the outdoor units 21a and 21b side, and the refrigerant is then evaporated by exchanging heat with air in the air-conditioning target space in the heat exchanger (not shown) in the indoor units 23a and 23b. The air is then cooled.

  On the other hand, the water after heat exchange with the refrigerant in the outdoor unit water heat exchangers 22a and 22b is hot water and flows again into the heat exchanger 10 via the pipe L6.

(3-2) Heating cycle Next, the flow of water and the operation of each device in the primary side circuit 1a and the secondary side circuit 1b when the water heat source air conditioning system 1 performs the heating cycle will be briefly described.

  First, when an instruction to start the heating operation of the air conditioners 2a and 2b is made by a user using a remote controller (not shown) or the like, the control unit 15 acquires an instruction to start the heating operation from the remote controller. Then, the four-way switching valves 6, 8, and 12 switch the flow paths as shown by the solid lines in FIG. 1 by the flow-path switching control of the four-way switching valves 6, 8, and 12 by the control unit 15. Specifically, the four-way switching valve 6 communicates the outlet of the first pump 5 with the chiller 3 and communicates the low temperature side section 44 of the water tank 4 with the inlet of the first pump 5. The four-way switching valve 8 communicates the outlet of the second pump 7 and the heat exchanger 10 and communicates the high temperature side section 41 of the water tank 4 and the inlet of the second pump 7. The four-way switching valve 12 communicates the outlet of the third pump 11 and the outdoor units 21a and 21b (specifically, the outdoor unit water heat exchangers 22a and 22b) and heat exchange. The vessel 10 communicates with the inlet of the third pump 11.

  Next, drive control of the pumps 5, 7, 11 and the chiller 3 is performed by the control unit 15, and in the water heat source air conditioning system 1, water circulates as indicated by arrows in FIG. 5. Specifically, in the primary side circuit 1 a, water from the low temperature side section 44 of the water tank 4 flows into the chiller 3, is heated by the chiller 3, and then flows into the high temperature side section 41 of the water tank 4. Further, the water in the high temperature side section 41 flows into the heat exchanger 10 by the second pump 7, and after the heat exchanger 10 dissipates heat to the water on the secondary circuit 1 b side and is cooled, the low temperature side Return to compartment 44. At this time, in the water tank 4, the flow of water from the low temperature side section 44 to the high temperature side section 41 or the reverse flow of water is formed. The temperature of the water in the water tank 4 is controlled by the control of the device group 9 by the control unit 15 so that the temperature in the high temperature side section 41 is within a predetermined range B shown in FIG.

  In the secondary circuit 1b, the water that has been absorbed by the heat exchanger 10 from the water on the primary circuit 1a side is heated into the outdoor units 21a and 21b, and the outdoor unit water heat exchangers 22a and 22b. Heat exchange with refrigerant. As a result, the refrigerant evaporates on the outdoor unit 21a, 21b side, and then the refrigerant is condensed by exchanging heat with air in the air-conditioning target space in the heat exchanger (not shown) in the indoor unit 23a, 23b. The air is then warmed.

  On the other hand, the water after heat exchange with the refrigerant in the outdoor unit water heat exchangers 22a and 22b is low-temperature water and flows again into the heat exchanger 10 through the pipe L4.

(3-3) Overall Operation of Water Heat Source Air Conditioning System Next, the operation of the water heat source air conditioning system 1 will be described in the present embodiment.

[Overall operation]
FIGS. 8-9 is a flowchart which shows the flow of the whole operation | movement of the water-source air-conditioning system 1 which concerns on this embodiment.

  Steps S <b> 1 to S <b> 2: When a cooling operation start is instructed from a remote controller or the like (Yes in S <b> 1), the control unit 15 starts temperature control so that the temperature in the low temperature side section 44 in the water tank 4 becomes a set value. At the same time, a cooling cycle is started (S2). In addition, the control unit 15 determines the predetermined range used when determining whether or not an abnormality has occurred in the device group 9 as “predetermined range A”, and moves from the first pump 5 to the low temperature side section 44 of the water tank 4. The device group 9 is controlled so that water is supplied and the temperature of the water in the low temperature side section 44 is within the predetermined range A.

  Steps S3 to S4: The control unit 15 acquires the temperature in the low temperature side section 44 from a temperature sensor (not shown), for example, every 5 minutes, and monitors whether the temperature is within the predetermined range A. When the temperature is equal to or higher than the predetermined range A, that is, exceeds the upper limit value of the predetermined range A (Yes in S3), the control unit 15 determines that an abnormality related to the device group 9 has occurred, and Then, abnormality response control 1 is performed (S4). The flow of the abnormality handling control 1 will be described later.

  Steps S5 to S6: When the temperature in the low temperature side section 44 is not equal to or higher than the predetermined range A (No in S3) and is equal to or lower than the predetermined range A, that is, lower than the lower limit value of the predetermined range A (Yes in S5), The control unit 15 determines that an abnormality related to the device group 9 has occurred, and performs abnormality response control 2 on the device group 9 (S6). The flow of the abnormality handling control 2 will be described later.

  If the temperature is within the predetermined range A (No in S5), the control unit 15 determines that no abnormality relating to the device group 9 has occurred, and performs the operations after step S9.

  Steps S7 to S9: If the abnormality in the temperature of the water in the water tank 4 has not yet been resolved even after the abnormality handling controls 1 and 2 in steps S4 and S6 are performed (No in S7), the controller 15 The control is returned to the control before the corresponding control 1 or 2 is performed (S8). On the other hand, when the temperature abnormality of the water in the water tank 4 is resolved by the abnormality response controls 1 and 2 in steps S4 and S5 (Yes in S7), the water heat source air conditioning system 1 performs the cooling operation from the remote controller or the like. As long as there is no stop instruction | indication, a cooling cycle is continued (Yes of S9) and the operation | movement after step S3 is repeated. If there is an instruction to stop the cooling operation from a remote controller or the like (No in S9), the water heat source air conditioning system 1 ends the cooling cycle and ends a series of operations.

  Steps S11 to S12: When a heating operation start is instructed from a remote controller or the like (Yes in S11), the control unit 15 starts temperature control so that the temperature in the high temperature side section 41 in the water tank 4 becomes a set value. At the same time, the heating cycle is started (S12). Further, the control unit 15 determines the predetermined range used when determining whether or not an abnormality has occurred in the device group 9 as the “predetermined range B”, and moves from the first pump 5 to the high temperature side section 41 of the water tank 4. The device group 9 is controlled so that water is supplied and the temperature of the water in the high temperature side section 41 is within the predetermined range B.

  Steps S13 to S14: The control unit 15 acquires the temperature in the high temperature side section 41 from a temperature sensor (not shown), for example, every 5 minutes, and monitors whether the temperature is within the predetermined range B. If the temperature is equal to or lower than the predetermined range B, that is, lower than the lower limit value of the predetermined range B (Yes in S13), the control unit 15 determines that an abnormality related to the device group 9 has occurred, and On the other hand, abnormality response control 1 is performed (S14). The flow of the abnormality handling control 1 will be described later.

  Steps S15 to S16: When the temperature in the high temperature side section 41 is not lower than the predetermined range B (No in S13) and is higher than the predetermined range B, that is, exceeds the upper limit value of the predetermined range B (Yes in S15), The control unit 15 determines that an abnormality related to the device group 9 has occurred, and performs abnormality response control 2 on the device group 9 (S16). The flow of the abnormality handling control 2 will be described later.

  If the temperature is within the predetermined range B (No in S15), the control unit 15 determines that no abnormality has occurred with respect to the device group 9, and performs the operations after Step S19.

  Steps S17 to S18: If the abnormality in the temperature of the water in the water tank 4 has not yet been resolved even after the abnormality handling controls 1 and 2 in steps S14 and S16 are performed (No in S17), the controller 15 determines that the abnormality has occurred. The control is returned to the control before performing the corresponding control 1 or 2 (S18). On the other hand, when the temperature abnormality of the water in the water tank 4 is resolved by the abnormality response control 1 or 2 in steps S14 and S16 (Yes in S17), the water heat source air conditioning system 1 performs the heating operation from the remote controller or the like. As long as there is no stop instruction | indication, a heating cycle is continued (Yes of S19) and the operation | movement after step S13 is repeated. If there is an instruction to stop the heating operation from a remote controller or the like (No in S19), the water heat source air conditioning system 1 ends the heating cycle and ends a series of operations.

[Abnormality response control 1]
FIG. 10 is a flowchart showing a subroutine of abnormality response control 1 in steps S4 and S14 of FIGS.

  Step S21: First, the control unit 15 performs the first control for a predetermined time. That is, when a plurality of second pumps 7 are operating, the control unit 15 reduces the flow rate of water circulated by the second pumps 7 by sequentially reducing the number of operating second pumps 7. To control.

  Steps S22 to S24: When the temperature abnormality of the water in the water tank 4 has been improved or eliminated by the first control performed in Step S21 (Yes in S22), the control unit 15 has an abnormality related to the device group 9. It is determined that it has been improved or eliminated, and the first control is continued (S23). When the temperature abnormality of the water in the water tank 4 is not improved and eliminated (No in S22), the control unit 15 determines that the abnormality related to the device group 9 is not improved or eliminated, and then performs the second control. This is performed for a predetermined time (S24). In other words, the control unit 15 further reduces the flow rate of the water circulated by the second pump 7 by performing control to reduce the rotation speed of the second pump 7 that is in operation by the first control. Take control.

  Steps S25 to S27: When the temperature abnormality of the water in the water tank 4 is improved or eliminated by the second control performed in Step S24 (Yes in S25), the control unit 15 has an abnormality related to the device group 9. It is determined that the problem has been improved or eliminated, and the second control is continued (S26). When the temperature abnormality of the water in the water tank 4 is not improved and eliminated (No in S25), the control unit 15 determines that the abnormality related to the device group 9 is not improved or eliminated, and then performs the third control. This is performed for a predetermined time (S27). That is, if the chiller 3 and the first pump 5 are not in operation, the control unit 15 operates to operate the chiller 3 and the first pump 5 that are not in operation, thereby eliminating the shortage of water supply to the water tank 4. I do.

  Steps S28 to S30: When the temperature abnormality of the water in the water tank 4 is improved or eliminated by the third control performed in Step S27 (Yes in S28), the control unit 15 has an abnormality related to the device group 9. It is determined that the problem has been improved or eliminated, and the third control is continued (S29). If the temperature abnormality in the water in the water tank 4 has not been improved or eliminated even after the third control is performed (No in S28), the control unit 15 performs the determination after the determination result is “present” and the abnormality occurs. Control content information indicating the content of the abnormal response control (that is, the content indicating that the first control to the third control have been performed for a predetermined time), the “existence” abnormality after the abnormal response control, and after the abnormal response control The result information including the degree of abnormality “not improved” or “deteriorated” is created. The output unit 16 outputs the various types of information created by the control unit 15 to a remote controller or an external terminal of the center (S30).

  Step S31: When any one of the first control to the third control is improved or eliminated and any one of the first control to the third control is continuously performed (S23, S26) , S29), the control unit 15 determines that the determination result is “Yes”, the control content information indicating the content of the abnormality handling control that has been performed since the abnormality occurred (that is, the first control to the third control performed until the abnormality is improved). Control result), the result information including the fact that the abnormality after the abnormality handling control is “None” or the degree of abnormality “Improved” is created. The output unit 16 outputs the various information created by the control unit 15 to a remote controller or an external terminal of the center.

  The first control to the third control are performed when conditions for performing each control (for example, a plurality of second pumps 7 are operating, etc.) are satisfied. If not satisfied, the next scheduled control is performed. For example, when only one second pump 7 is driven from the beginning, the first control is not performed, and the second control and the third control are performed as the abnormality handling control.

[Abnormality response control 2]
FIG. 11 is a flowchart showing a subroutine of abnormality response control 2 in steps S6 and S16 of FIGS.

  Step S41: First, the control unit 15 performs the fourth control for a predetermined time. That is, when a plurality of chillers 3 are operating, the control unit 15 reduces the number of operating chillers 3 in order, thereby eliminating excess operating capacity of the chillers 3 and the first pump 5. Take control.

  Steps S42 to S44: When the temperature abnormality in the water in the water tank 4 is improved or eliminated by the fourth control performed in Step S41 (Yes in S42), the control unit 15 determines that the abnormality related to the device group 9 has occurred. It is determined that the problem has been improved or eliminated, and the fourth control is continued (S43). When the temperature abnormality of the water in the water tank 4 is not improved and eliminated (No in S42), the control unit 15 determines that the abnormality related to the device group 9 is not improved or eliminated, and then performs the fifth control. This is performed for a predetermined time (S44). That is, when the number of second pumps 7 operated is one, the control unit 15 increases the number of rotations of the second pump 7 that is operating, thereby controlling the flow rate shortage of the second pump 7. Do.

  Steps S45 to S47: If the temperature abnormality of the water in the water tank 4 has been improved or eliminated by the fifth control performed in Step S44 (Yes in S45), the control unit 15 has an abnormality related to the device group 9. It is determined that the problem has been improved or eliminated, and the fifth control is continued (S46). When the temperature abnormality of the water in the water tank 4 is not improved and eliminated (No in S45), the control unit 15 determines that the abnormality related to the device group 9 is not improved or eliminated, and then performs the sixth control. This is performed for a predetermined time (S47). That is, the control unit 15 performs control for eliminating the shortage of the flow rate of the second pump 7 by sequentially increasing the number of operating second pumps 7.

  Steps S48 to S50: When the temperature abnormality in the water in the water tank 4 has been improved or eliminated by the sixth control performed in Step S47 (Yes in S48), the control unit 15 has an abnormality related to the device group 9. It is determined that it has been improved or eliminated, and the sixth control is continued (S49). If the abnormal temperature of the water in the water tank 4 is not improved or eliminated even after the sixth control is performed (No in S48), the control unit 15 performs the determination after the determination result is “present” and the abnormality occurs. Control content information indicating the content of the abnormal response control (that is, the content indicating that the fourth control to the sixth control were performed for a predetermined time), the presence of abnormality “present” after the abnormal response control, and after the abnormal response control The result information including the degree of abnormality “not improved” or “deteriorated” is created. The output unit 16 outputs the various information created by the control unit 15 to the remote controller or the external terminal of the center (S50).

  Step S51: When the abnormality is improved or eliminated by any one of the fourth control to the sixth control, and any one of the first control to the third control is continuously performed (S43, S46) , S49), the control unit 15 determines that the determination result is “Yes”, the control content information indicating the content of the abnormality handling control that has been performed since the abnormality occurred (that is, the fourth control to the sixth control performed until the abnormality is improved). Control result), the result information including the fact that the abnormality after the abnormality handling control is “None” or the degree of abnormality “Improved” is created. The output unit 16 outputs the various information created by the control unit 15 to a remote controller or an external terminal of the center.

  The fourth control to the sixth control are performed when conditions for performing each control (for example, when a plurality of chillers 3 are operating) are satisfied, and the conditions are not satisfied. In this case, it is assumed that the next scheduled control is performed. For example, when only one of the chillers 3 connected in parallel is driven from the beginning, the fourth control is not performed, and the fifth control and the sixth control are performed as the abnormality handling control.

(4) Effect (A)
According to the water heat source air conditioning system 1 according to the present embodiment, when the temperature of the water in the aquarium 4 is outside the predetermined ranges A and B, there is an abnormality related to the device group 9 including the first pump 5 and the second pump 7. It is determined that a failure has occurred, and abnormality handling control is performed on the device group 9. Here, examples of the abnormality related to the device group 9 include an abnormal flow rate such as an excessive flow rate or insufficient flow rate of the second pump 7, an insufficient capability of the chiller 3 and the first pump 5, and the like. Examples include control for reducing the flow rate of the pump 7 and conversely control for increasing the flow rate. Thereby, the abnormality of the temperature of the water in the water tank 4 can be improved or eliminated, and therefore, the efficiency of the air conditioners 2a and 2b using water as a heat source and the increase in power consumption can be prevented.

(B)
In the water heat source air conditioning system 1 according to the present embodiment, when the control unit 15 determines that an abnormality related to the device group 9 has occurred, the first pump 5, the second pump 7, and the device group 9 At least one of the chillers 3 is controlled differently from normal control (that is, when the temperature of the water in the water tank 4 is within the predetermined ranges A and B). Therefore, when there is something that causes an abnormality in the first pump 5, the second pump 7, and the chiller 3, the abnormality can be improved or eliminated.

(C)
In addition, the abnormality handling control according to the present embodiment includes at least one of the first control, the second control, and the third control. The first control is control that sequentially reduces the number of operating second pumps 7. The second control is control for reducing the rotational speed of the second pump 7 that is operating. The third control is a control for operating the chiller 3 and the first pump 5 that are not in operation. That is, the first control and the second control are controls for reducing the flow rate of the water circulated by the second pump 7, and the third control supplies the water heated or cooled by the chiller 3 to the water tank 4. It can be said that it is control. According to this water heat source air conditioning system 1, when the abnormality related to the device group 9 that is occurring is a flow rate abnormality of the second pump 7 (specifically, an excessive flow rate), the abnormality is caused by the first control and the second control. Is improved, and when the abnormality related to the generated device group 9 is an abnormality based on insufficient supply of water to the water tank 4, the abnormality is improved or eliminated by the third control.

(D)
In the water heat source air conditioning system 1 according to the present embodiment, the first control, the second control, and the third control are performed in a predetermined order as the abnormality handling control. That is, in the water heat source air conditioning system 1, the contents of the abnormality response control to be executed change in order, and thus a flow rate abnormality (specifically, excessive flow rate) of the second pump 7 that is often considered as an abnormality related to the device group 9 occurs. If so, the abnormality is improved by the first control and the second control. Moreover, when the abnormality based on the shortage of the supply of water to the water tank 4, which is often considered as an abnormality related to the device group 9, has occurred, the abnormality is improved by the third control. In other words, in the water heat source air conditioning system 1, since the first control to the third control are sequentially performed as the abnormality handling control, the contents of the abnormality handling control that changes even if the contents of the abnormality concerning the device group 9 are not specified. By either of these, the abnormality related to the device group 9 is improved or eliminated. Therefore, the temperature abnormality of the water in the water tank 4 can be improved or eliminated.

(E)
As the content of the abnormality related to the device group 9 when the temperature of the water in the low temperature side section 44 in the water tank 4 is equal to or higher than the predetermined range A during the cooling cycle, the flow rate abnormality of the second pump 7 (specifically, excessive flow rate) ), And then abnormalities based on insufficient supply of water to the aquarium 4. In the water heat source air conditioning system 1 according to the present embodiment, when the temperature of the water in the low temperature side section 44 is equal to or higher than the predetermined range A during the cooling cycle, the flow rate abnormality (excessive flow rate) of the second pump 7 is most likely. The first control and the second control corresponding to the above are performed, and then the third control corresponding to the shortage of water supply to the water tank 4 having the next highest possibility is performed. That is, in this water heat source air-conditioning system 1, since the corresponding control is performed in the descending order of the content of the abnormality related to the device group 9, the abnormality related to the device group 9 can be improved or eliminated relatively quickly. An abnormality in the temperature of the water in the water tank 4 can be improved or eliminated.

(F)
Moreover, as the content of the abnormality regarding the equipment group 9 when the temperature of the water in the high temperature side section 41 in the water tank 4 is equal to or lower than the predetermined range B during the heating cycle, the flow rate abnormality of the second pump 7 (specifically, (Excessive flow rate) is best cited, followed by abnormalities based on insufficient supply of water to the aquarium 4. According to the water source air conditioning system 1 according to the present embodiment, when the temperature of the water in the high temperature side section 41 is equal to or less than the predetermined range B during the heating cycle, the flow rate abnormality (excessive flow rate) of the second pump 7 is most likely. The first control and the second control corresponding to) are performed, and then the third control corresponding to the shortage of water supply to the water tank 4 that is most likely next is performed. That is, in this water heat source air conditioning system 1, since the corresponding control is performed in the descending order of the possibility of the abnormality related to the device group 9, the abnormality related to the device group 9 can be improved or eliminated relatively quickly. An abnormality in the temperature of the water in the water tank 4 can be improved or eliminated.

(G)
Further, the abnormality handling control according to the present embodiment includes at least one of the fourth control, the fifth control, and the sixth control. The fourth control is a control that sequentially reduces the number of operating chillers 3 and first pumps 5. The fifth control is a control for increasing the rotational speed of the second pump 7 that is operating. The sixth control is control for sequentially increasing the number of operating second pumps 7. That is, the fourth control is a control for reducing the capacity of heating or cooling water by the chiller 3 and the operation capacity of the first pump 5, and the fifth control and the sixth control are water circulated by the second pump 7. It can be said that the control is to increase the flow rate. According to the water heat source air-conditioning system 1, when the content of the abnormality related to the generated device group 9 is an excess of the operating capacity of the chiller 3 and the first pump 5, the abnormality is improved by the fourth control. When the content of the abnormality related to the device group 9 is a flow rate abnormality (specifically, insufficient flow rate) by the second pump 7, the abnormality is improved or eliminated by the fifth control and the sixth control.

(H)
Further, in the water heat source air conditioning system 1 according to the present embodiment, the fourth control, the fifth control, and the sixth control are performed in a predetermined order as the abnormality handling control. That is, in the water heat source air conditioning system 1, since the contents of the abnormality response control to be executed change in order, an excess of the operating capacity of the chiller 3 and the first pump 5 that is often considered as the contents of the abnormality related to the device group 9 occurs. If so, the abnormality is improved by the fourth control. Further, when an abnormality in the flow rate of the second pump 7 (specifically, an insufficient flow rate) occurs as the content of the abnormality related to the device group 9, the abnormality is improved by the fifth control or the sixth control. That is, in the water heat source air conditioning system 1, since the fourth control to the sixth control are sequentially performed as the abnormality response control, even if the content of the abnormality related to the device group 9 is not specified, the changing abnormality response control is performed. The abnormality related to the device group 9 is improved or eliminated depending on any of the contents. Therefore, the temperature abnormality of the water in the water tank 4 can be improved or eliminated.

(I)
As the content of the abnormality related to the device group 9 when the temperature of the water in the low temperature side section 44 in the water tank 4 is equal to or lower than the predetermined range A during the cooling cycle, the excess of the operating capacity of the chiller 3 and the first pump 5 is the most. It is often mentioned, and then the flow rate abnormality (specifically, the flow rate is insufficient) of the second pump 7 is mentioned. In this water heat source air conditioning system 1, when the temperature of the water in the low temperature side section 44 becomes a predetermined range A or less during the cooling cycle, the most likely chiller 3 and the first pump 5 have an excess of operating capacity. The fifth control and the sixth control corresponding to the second most likely flow rate abnormality (shortage of flow rate) of the second pump 7 are then performed. That is, in this water heat source air conditioning system 1, since the corresponding control is performed in the descending order of the possibility of the abnormality related to the device group 9, the abnormality related to the device group 9 can be improved or eliminated relatively quickly. An abnormality in the temperature of the water in the water tank 4 can be improved or eliminated.

(J)
As the content of the abnormality related to the device group 9 when the temperature of the water in the high temperature side section 41 in the water tank 4 becomes equal to or higher than the predetermined range B during the heating cycle, the excess of the operating capacity of the chiller 3 and the first pump 5 is the most. It is often mentioned, and then there is an abnormal flow rate of the second pump 7 (specifically, insufficient flow rate). In this water heat source air conditioning system 1, when the temperature of the water in the high temperature side section 41 is equal to or higher than the predetermined range B during the heating cycle, the most likely chiller 3 and the first pump 5 have an excess of operating capacity. The fifth control and the sixth control corresponding to the second most likely flow rate abnormality (shortage of flow rate) of the second pump 7 are then performed. That is, in this water heat source air conditioning system 1, since the corresponding control is performed in the descending order of the possibility of the abnormality related to the device group 9, the abnormality related to the device group 9 can be improved or eliminated relatively quickly. An abnormality in the temperature of the water in the water tank 4 can be improved or eliminated.

(K)
Further, in the present embodiment, at least one of the determination result, the control content information indicating the content of the abnormality handling control, and the result information including the presence / absence and degree of the abnormality regarding the device group 9 after the abnormality handling control is performed is output. The data is output to a remote controller or an external terminal by the unit 16. Therefore, the user of the water heat source air conditioning system 1 according to the present embodiment and the operator of the external terminal can determine whether there is an abnormality in the water heat source air conditioning system 1, the content of the abnormality, and the abnormality response control. You can know the state of. Therefore, if the abnormality related to the device group 9 has not been improved or solved, the user of the system 1 or the operator of the external terminal can take a control different from the control performed so far as a measure. . Therefore, it is possible to suppress the period during which the power consumption of the system 1 increases as much as possible and to shorten the time until a measure is taken. Further, if the result information is information indicating that the abnormality related to the device group 9 has been improved or eliminated, the user or the operator of the external terminal may have generated the device group 9 based on the determination result and the control content information. The content of the abnormality regarding

(L)
Further, in the water heat source air conditioning system 1 according to the present embodiment, the water tank 4 is divided into four compartments, each of which includes a high temperature side compartment 41, an intermediate high temperature side compartment 42, an intermediate low temperature side compartment 43, and a low temperature side compartment 44. Since the water flows in order in these sections 41 to 44, a temperature difference is generated for each of the sections 41 to 44. In the cooling cycle, the chiller 3 cools the water, and this water is supplied to the low temperature side section 44 having the lowest temperature in the water tank 4. During the heating cycle, the chiller 3 heats water, and this water is supplied to the high temperature side section 41 having the highest temperature. Therefore, regardless of whether the cooling cycle or the heating cycle is operated, the temperature of the inside of the water tank 4 is low in the lower compartments 44 and 43 (particularly the compartment 44), and the higher compartments 42 and 41 (particularly the compartment 41). ) Increases the temperature.

(M)
Further, in the water heat source air conditioning system 1 according to the present embodiment, the temperature in the low temperature side section 44 is used for controlling the device group 9 during the cooling cycle, and the temperature in the high temperature side section 41 is used during the heating cycle. Used for control. Accordingly, during the cooling cycle, the abnormality regarding the device group 9 is determined based on the temperature of the water in the low temperature side section 44, and during the heating cycle, the abnormality regarding the device group 9 is determined based on the temperature of the water in the high temperature side section 41.

<Other embodiments>
(A)
In the said embodiment, as shown in FIG. 1, the heat energy based on the water stored in the water tank 4 of the primary side circuit 1a is each air conditioner 2a via the secondary side circuit 1b including the heat exchanger 10. , 2b. However, the thermal energy based on the water stored in the water tank 4 may be directly supplied to the outdoor units 21a and 21b of the air conditioners 2a and 2b without using the heat exchanger 10. In this case, the configuration of the secondary circuit 1b including the heat exchanger 10 is unnecessary, and the water heat source air conditioning system can directly send the water sucked up from the water tank 4 by the second pump 7 to the outdoor units 21a and 21b. It becomes the composition.

(B)
In the said embodiment, as shown to FIG.1,3,5, the case where the flow direction of the water at the time of a cooling cycle and a heating cycle was switched by the four-way switching valve 6,8,12 was demonstrated. However, as a method of switching the water flow direction in the water heat source air conditioning system, a method that does not use a four-way switching valve may be employed. As a method of switching the water flow direction without using the four-way switching valve, a method of connecting reverse pumps in parallel to the first pump, the second pump, and the third pump, the first pump, and the second pump, respectively. In addition, as the third pump, a method using a pump capable of switching the flow direction of water in reverse can be used.

(C)
In the said embodiment, the case where the chiller 3 was employ | adopted as a heating-cooling part which heats or cools water was demonstrated. However, as long as the water of the primary circuit 1a can be heated or cooled, the heating / cooling unit may be any type and may not be the chiller 3.

(D)
In the said embodiment, the 1st control-3rd control included in abnormality response control is performed in order of 1st control, 2nd control, and 3rd control, 4th control-6th control are 4th control, It has been described that the control is performed in the order of the fifth control and the sixth control. However, the order in which the first control to the third control and the fourth control to the sixth control are performed is not limited to this, and may be performed in a predetermined order appropriately determined. The predetermined order can be appropriately determined based on various information regarding the water heat source air conditioning system 1 input by an input unit (not shown). For example, when the environmental information of the system 1 is input via the input means by a so-called contractor who introduces the water heat source air conditioning system 1 to the site, the information before the system 1 is actually used. A predetermined order is determined based on the above. Moreover, it may be appropriately determined by the user who uses the system 1 before the system 1 is actually used. Furthermore, even after the use of the system 1, priority is given to abnormality response control corresponding to the cause of the abnormality that occurs relatively frequently from the history of the contents of the abnormality that has actually occurred using the system 1. It may be set.

(E)
In the above embodiment, the case where the output unit 16 outputs all of the result information, the control content information, and the result information to the outside has been described. However, the output unit 16 may output at least one of these pieces of information to the outside instead of all of the result information, the control content information, and the result information.

(F)
Moreover, in the said embodiment, as shown in FIG. 7, the case where the various information output outside by the output part 16 was screen-displayed on the external terminal in a center was demonstrated. However, the various types of information output by the output unit 16 are not limited to being displayed on the screen of a remote controller or an external terminal in the center, and may be printed on paper, output by voice, It may be output so as to be recognizable to a user or the like by a combination with a screen display or an LED.

(G)
In the said embodiment, as shown to FIGS. 8-9, when the temperature abnormality of the water in the water tank 4 is not improved (No of S7, No of S17), it returns to the control before performing abnormality response control. (S8, S18). However, when the temperature abnormality of the water in the water tank 4 is not improved, the water heat source air conditioning system 1 does not return to the state before performing the abnormality handling control, but stops the cooling cycle and the heating cycle. Good.

(H)
In the said embodiment, the case where the temperature sensor which is not shown in figure was each provided in the low temperature side division 44 and the high temperature side division 41 of the water tank 4 was demonstrated. However, the installation location of the temperature sensor is not limited to this, and may be inside the pipe L3. In this case, the temperature sensor is provided inside the end on the low temperature side section 44 among the ends of the pipe L3 and inside the end on the high temperature side section 41 among the ends of the pipe L3. ing. Thereby, the detection result of the temperature sensor in the end portion on the low temperature side section 44 side of the pipe L3 is captured by the control unit 15 during the cooling cycle, and the detection of the temperature sensor in the end section on the high temperature side section 41 side of the pipe L3 is detected. The result is captured by the control unit 15 during the heating cycle.

  The water heat source air conditioning system according to the present invention can improve or eliminate the abnormality of the temperature of the water in the water reservoir, and therefore can prevent the efficiency reduction and the increase in power consumption of the air conditioning apparatus using water as a heat source. Have This water heat source air conditioning system can be applied as a system for improving the efficiency of an air conditioner using water as a heat source.

DESCRIPTION OF SYMBOLS 1 Water heat source air conditioning system 1a Primary side circuit 1b Secondary side circuit 2a, 2b Air conditioner 21a, 21b Outdoor unit 22a, 22b Outdoor unit water heat exchanger 23a, 23b Indoor unit 3 Chiller 4 Water tank 41 High temperature side section 42 Medium high temperature Side compartment 43 Middle low temperature side compartment 44 Low temperature side compartment 5 First pump 6, 8, 12 Four-way switching valve 7 Second pump 9 Device group 10 Heat exchanger 11 Third pump 15 Control section 16 Output sections L1 to L6 Piping Inf1 Judgment result Inf2 Control content information Inf3 Result information

JP 2009-002532 A

Claims (13)

A water heat source air conditioning system (1) for improving the efficiency of an air conditioner (2a, 2b) using water as a heat source,
A heating / cooling section (3) for heating or cooling water;
A water storage section (4) for storing water heated or cooled by the heating / cooling section (3);
A first pump (5) capable of supplying water heated or cooled by the heating / cooling unit (3) to the water storage unit (4);
A second pump (7) capable of supplying heat energy based on the water in the water reservoir (4) to the air conditioner (2a, 2b);
A device group (9) including the first pump (5), the second pump (7), and the heating and cooling unit (3) so that the temperature of the water in the water storage unit (4) is within a predetermined range. A control unit (15) for controlling
With
When the temperature of the water in the water storage unit (4) is outside the predetermined range, the control unit (15) determines that an abnormality relating to the device group (9) has occurred, and based on the determination result Anomaly control is performed on the device group (9).
Water source air conditioning system (1). In the abnormality handling control, the water storage unit (4) is provided for at least one of the first pump (5), the second pump (7), and the heating / cooling unit (3) included in the device group (9). ) Is a control for performing an operation different from the operation in the case where the temperature of the water in is within the predetermined range.
The water heat source air conditioning system (1) according to claim 1. A plurality of the second pumps (7) are provided,
In the abnormality response control,
When a plurality of the second pumps (7) are operating, a first control for sequentially reducing the number of operating second pumps (7),
When the second pump (7) is in operation, the second control for decreasing the rotational speed of the second pump (7) in operation, and the heating / cooling unit (3) and the first pump When (5) is not in operation, the third control for operating the heating / cooling unit (3) and the first pump (5) that are not in operation;
At least one of
The water heat source air conditioning system (1) according to claim 2. The control unit (15) performs the first control, the second control, and the third control in a predetermined order as the abnormality handling control.
The water heat source air conditioning system (1) according to claim 3. When the temperature of the water in the water storage unit (4) is equal to or higher than the predetermined range during the cooling operation, the control unit (15) is in the order of the first control, the second control, and the third control. Performing the abnormality handling control,
The water heat source air conditioning system (1) according to claim 4. When the temperature of the water in the water storage unit (4) is equal to or lower than the predetermined range during the heating operation, the control unit (15) is in the order of the first control, the second control, and the third control. Performing the abnormality handling control,
The water heat source air conditioning system (1) according to claim 4. A plurality of the second pumps (7) and the heating / cooling units (3) are provided,
In the abnormality response control,
A fourth control for sequentially reducing the number of operating units of the heating and cooling unit (3) and the first pump (5) when a plurality of the heating and cooling unit (3) and the first pump (5) are operating;
When one second pump (7) is operating, the fifth control for increasing the number of rotations of the second pump (7) that is operating, and the number of operating second pumps (7) are sequentially 6th control to increase,
At least one of
The water heat source air conditioning system (1) according to claim 2. The control unit (15) performs the fourth control, the fifth control, and the sixth control in a predetermined order as the abnormality handling control.
The water heat source air conditioning system (1) according to claim 7. When the temperature of the water in the water storage section (4) falls below the predetermined range during the cooling operation, the control section (15) performs the fourth control, the fifth control, and the sixth control in the order. Performing the abnormality handling control,
The water heat source air conditioning system (1) according to claim 8. When the temperature of the water in the water storage section (4) is equal to or higher than the predetermined range during the heating operation, the control section (15) is in the order of the fourth control, the fifth control, and the sixth control. Performing the abnormality handling control,
The water heat source air conditioning system (1) according to claim 8. An output unit (16) that outputs at least one of the determination result, the control content information indicating the content of the abnormality handling control, and the result information including the presence and extent of the abnormality after the abnormality handling control is performed (16 ),
Further comprising
The water heat source air conditioning system (1) according to any one of claims 1 to 10. The water storage part (4) is divided into a plurality of compartments (41 to 44) inside, and water flows in order through the plurality of compartments, thereby causing a temperature difference for each compartment,
The first pump (5)
During cooling operation, water from the heating and cooling unit (3) is supplied to the compartment (44) having the lowest temperature in the water storage unit (4),
During heating operation, water from the heating and cooling unit (3) is supplied to the compartment (41) having the highest temperature in the water storage unit (4).
The water heat source air conditioning system (1) according to any one of claims 1 to 11. The control unit (15)
During the cooling operation, the device group (9) is controlled so that the temperature in the compartment (44) having the lowest temperature in the water storage section (4) is within the predetermined range,
During the heating operation, the device group (9) is controlled so that the temperature in the compartment (41) having the highest temperature in the water storage section (4) is within the predetermined range.
The water heat source air conditioning system (1) according to claim 12.

Images