JPH07167512A - Controller for composite refrigerant circuit facility - Google Patents

Abstract

PURPOSE:To provide a controller which can improve a general refrigerating efficiency as an entire facility and control for a composite refrigerant circuit facility for moving excess cold of a refrigerant circuit having high refrigerating efficiency to a refrigerant circuit having low refrigerating efficiency. CONSTITUTION:A cold storage amount is calculated by cold storage amount detecting means 41 based on a signal of a state of water of heat storage tank detected by a sensor 47. Cold storage amount deciding means 42 decides whether the cold storage amount becomes insufficient or not until a cold dissipating operation is finished. If insufficiency is decided, a signal is output. On the other hand, a priority order is set to priority order setting means 43 according to importance of a matter to be cooled and contained at each connected system, and these priority order is stored in priority order memory means 44. A system to be stopped for cold dissipation is decided by stopping system deciding means 45, a stop signal is output by cold dissipation stopping means 46, and cold dissipation of the corresponding system is stopped by a cold dissipation stop actuator 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of refrigerant circuits for cooling a plurality of environments to be cooled which have different cooling temperature ranges, so to speak, and a plurality of refrigerant circuits having different evaporator evaporation temperatures, and for storing cold heat. The present invention relates to a control device for efficiently controlling composite refrigerant circuit equipment provided with a heat storage tank.

[0002]

2. Description of the Related Art As a composite refrigerant circuit facility of this type,
The present invention was invented by the present inventors, and prior to the present application, Japanese Patent Application No. 5-
There is an application filed as No. 26732. FIG. 26 shows this composite type refrigerant circuit facility.

In the figure, 1 is a refrigeration side compressor (first compressor), 2 is a refrigeration side condenser (first condenser), and 3 is 5.
The refrigeration-side solenoid valve for interrupting the refrigerant supplied to the refrigeration-side evaporator (first evaporator) shown by 4 is a refrigeration-side expansion valve (first
Of the throttling device), 6 is a refrigerant pipe on the refrigerating side for communicating these. Further, 7 is a heat storage tank containing a heat storage agent such as water, 8 is a refrigeration side heat storage evaporator (heat storage heat exchanger) arranged in the heat storage agent of the heat storage tank 7, and 9 is a refrigeration side heat storage evaporation. Refrigerant-side heat storage solenoid valve for connecting and disconnecting the refrigerant to be supplied to the container 8. Reference numeral 10 is a refrigerating-side heat storage expansion valve (an example of a heat-storage expansion device). The refrigerant piping for sending a refrigerant to container 8 is shown. That is,
The refrigeration-side heat storage solenoid valve 9 is an example of a circuit opening / closing device, and the refrigerating-side heat storage expansion valve 10 is fully opened, and the refrigerant flow passage is freely opened and closed. A configuration including the refrigerant pipe 11 and the refrigeration side heat storage evaporator 8 is an example of a second cold heat supply circuit. 1 to
Cooling, for example, a showcase (an example of the first environment to be cooled, which is set to a target temperature exceeding 0 ° C., for example) in which the refrigerating evaporator 5 is placed, from the components denoted by reference numeral 11. A refrigerating-side refrigerant circuit (an example of a first refrigerant circuit) is configured.

Further, 21 is a refrigeration side compressor (second compressor), 22 is a refrigeration side condenser (second condenser), and 23 is 2.
A freezing side solenoid valve for connecting and disconnecting the refrigerant to be supplied to the freezing side evaporator (second evaporator) shown by 5, 24 is a freezing side expansion valve (an example of a second expansion device), and 26 is in communication therewith. Refrigerant piping valve on the freezing side, 31 is a heat exchanger for subcooling on the freezing side (heat exchanger for supplying cold heat) arranged in the heat storage agent of the heat storage tank 7,
Refrigerant 34 communicates the freezing-side subcooling heat exchanger 31 of the freezing-side refrigerant circuit provided in the heat storage tank 7 in series with the refrigerant pipeline 26 between the freezing-side condenser 22 and the freezing-side electromagnetic valve 23. Shows piping.

From the components denoted by the reference numerals 21 to 34, for example, a freezer in which the freezing side evaporator 25 is placed (an example of a second environment to be cooled, which is set to a target temperature of 0 ° C. or lower, for example) A cooling-side refrigerant circuit (an example of a second refrigerant circuit) that cools the cooling medium. In this case, the configuration including the refrigeration-side subcooling heat exchanger 31 and the refrigerant pipe 34a is an example of the first cold heat supply circuit. Here, illustration of load-side devices such as showcases, refrigerators, and freezers in stores is omitted.

Next, the operation of this composite refrigerant circuit facility will be described. Here, for example, in the refrigerating-side refrigerant circuit, the refrigerating-side compressor 1 and the refrigerating-side condenser 2 can cover the maximum load (an example of the maximum refrigerating capacity) preset for the environment to be cooled (showcase or the like). Since it is designed, when the load applied to the showcase or the like decreases, an excess refrigerating capacity is generated as a difference between the maximum load and the load applied to the showcase or the like at that time.

According to this composite type refrigerant circuit facility, an amount of the refrigerant liquid corresponding to the surplus refrigerating capacity is passed through the refrigerating side heat storage electromagnetic valve 9 and the refrigerating side heat storage expansion valve 10, and the refrigerating side heat storage evaporator 8 is provided. Is supplied to the heat storage agent in the heat storage tank 7 as cold heat.

On the other hand, in the refrigeration side refrigerant circuit, the high-temperature, high-pressure gas refrigerant compressed by the refrigeration side compressor 21 is liquefied by the refrigeration side condenser 22 and then passed through the refrigeration side supercooling refrigerant pipe 34. Refrigeration-side supercooling heat exchanger 3 in the heat storage tank 7
1 and is cooled via the heat storage agent. As a result, the refrigerant excited to a lower temperature is cooled by the freezing-side solenoid valve 23.
And the like to the freezing side evaporator 25.

As described above, the cold energy stored in the heat storage agent of the heat storage tank 7 from the refrigerating side refrigerant circuit as the surplus refrigerating capacity is
It is consumed in the refrigeration side refrigerant circuit via the shared heat storage agent. Therefore, while the excess cold heat in the refrigeration side evaporator 5 is stored in the refrigeration side refrigerant circuit having a high evaporation temperature of the refrigerant, that is, the refrigeration side refrigerant circuit having high operation efficiency, this cold heat is stored in the refrigeration side evaporator 25. Since it is used in a refrigeration side refrigerant circuit having a low evaporation temperature, that is, a low operation efficiency, it is possible to improve the overall refrigeration efficiency of the entire facility including the refrigeration side refrigerant circuit and the refrigeration side refrigerant circuit. Further, since only one heat storage tank is required, the structure of the heat storage tank can be simplified.

[0010]

However, in the above-described composite refrigerant circuit equipment, regardless of the amount of objects to be cooled stored in the showcase and the temperature in the case at that time,
In some cases, the cold storage amount of the heat storage agent was insufficient during the cold discharge operation in order to discharge cold heat to all systems. In addition, a large heat storage tank was required when a large safety factor was set so that the amount of cold storage would not be insufficient.

[0011] When the insufficient amount of cold storage becomes larger, the capacity of all the systems is reduced regardless of the objects to be cooled stored in the showcase, and the reliability of the entire equipment is reduced. there were.

Further, since the amount of heat cannot be transferred only to a necessary system and the amount of cold storage cannot be used efficiently, the heat storage tank and the like cannot be further downsized.

Further, since the load amount during the cooling operation is detected and the cooling operation is performed in the system with a large load and the cooling operation is performed in the system with a small load, the efficient operation cannot be performed.
When the load fluctuates greatly, the amount of cold storage may be insufficient, and the objects to be cooled may be damaged due to insufficient capacity.

Further, since the system capable of performing the cooling operation cannot be determined from the stored cooling storage amount, the amount of heat storage may be insufficient during the cooling operation time, resulting in lack of stability of capacity.

Further, it is impossible to set a system having a large load variation amount or a system having a small amount of stored objects to be cooled as a system having a high priority for the cold storage operation, resulting in low power consumption efficiency.

Further, during the cold storage operation, the cold storage operation could not be automatically switched from the cold storage operation to the cold discharge operation even if the load amount became large. There was an absolute shortage.

As described above, in the composite refrigerant circuit equipment, the overall control of the equipment as a whole between a plurality of systems has not been performed.

The present invention has been made to solve the above-mentioned problems, and efficiently stores cold in the heat storage tank or effectively consumes the cold heat once stored.
It is an object of the present invention to provide a control device for a combined cold internal circuit facility capable of performing comprehensive high-efficiency control of the entire facility between a plurality of systems.

[0019]

In order to achieve the above object, the control device for a composite type refrigerant circuit facility according to the present invention has the following technical means. That is, the control device for the composite refrigerant circuit facility according to the invention of claim 1 is:
A first refrigerant circuit in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected in an annular shape; First in the refrigerant circuit
Of the first refrigerant circuit and the heat storage refrigerant circuit in which the heat storage expansion device and the heat storage heat exchanger are sequentially connected in parallel with the expansion device and the first evaporator. A heat storage tank containing a heat storage agent that stores cold heat corresponding to the difference between the maximum refrigerating capacity and the required refrigerating capacity of the first cooled environment,
The second compressor, the second condenser, the second expansion device, and the second evaporator that cools the second cooled environment whose temperature is lower than that of the first cooled environment are sequentially connected in an annular shape. The second refrigerant circuit connected between the second condenser circuit of the second refrigerant circuit and the second condenser and the second evaporator of the second refrigerant circuit transfers the cold heat from the heat storage agent in the heat storage tank to the second refrigerant circuit. For controlling a composite refrigerant circuit facility having a first cold heat supply circuit having a cold heat supply heat exchanger to be supplied to, and a cold storage amount for detecting a cold storage amount stored in a heat storage agent of a heat storage tank Detecting means, cold storage amount determining means for comparing the detected cool storage amount with a preset predetermined cool storage amount, and priority setting for setting a priority order related to a system in which the cold heat supply of the second refrigerant circuit is to be performed. Means and a priority order storage means for storing the priority order related to the set second refrigerant circuit system. Stop system determination means for determining a system to stop the cold heat supply from the first cold heat supply circuit based on the comparison result by the cool storage amount determination means and the priority order stored in the priority order storage means; And a cooling operation stopping means for stopping the supply of cold heat to the system determined by the means.

According to a second aspect of the present invention, there is provided a combined refrigerant circuit control device for cooling a first compressor, a first condenser, a first expansion device, and a first cooled environment. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit formed by sequentially connecting a second evaporator to be cooled in a ring shape, and a second condenser of the second refrigerant circuit. A first cold supply circuit having a cold feed heat exchanger to be supplied to the second refrigerant circuit cold from the connected storage tank of the heat storage agent between the second evaporator, the first
Is connected between the first condenser and the first expansion device of the refrigerant circuit, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is used as heat storage heat. A heat storage tank for controlling a composite refrigerant circuit facility having a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by diverting to the exchanger. The cool storage amount detecting means for detecting the cool storage amount stored in the agent, the cool storage amount determining means for comparing the detected cool storage amount with a preset predetermined cool storage amount, and the cold heat supply of the first refrigerant circuit are performed. Priority setting means for setting the priority order for the power system, the priority storage means for storing the set priority order for the first refrigerant circuit system, the comparison result by the cool storage amount determination means, and the priority storage means. Based on the priority stored in the first refrigerant circuit Cold storage switching system determination means for determining a system to switch from cold storage operation to cold storage operation, and cold storage cold storage operation switching for driving the circuit switching device of the system determined by the cold storage switching system determination means to switch the system to cold storage operation And means.

In the composite refrigerant circuit control device according to a third aspect of the present invention, the first compressor, the first condenser, the first expansion device and the first environment for cooling are cooled. A first refrigerant circuit formed by sequentially connecting the evaporators in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device and a heat storage heat exchanger in parallel with the first evaporator. Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment is stored via the heat storage refrigerant circuit that is sequentially connected and the heat storage heat exchanger. A heat storage tank containing a heat storage agent, a second compressor, a second condenser, a second expansion device, and a second cooler than the first environment to be cooled.
Between a second refrigerant circuit of a plurality of systems in which second evaporators that cool the environment to be cooled are sequentially connected in an annular shape, and between the second condenser and the second evaporator of the second refrigerant circuit. And a first cold heat supply circuit having a cold heat supply heat exchanger for supplying cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit, the hybrid refrigerant circuit facility being controlled. A cool storage amount detecting means for detecting a cool storage amount stored in the heat storage agent of the heat storage tank,
A cool storage amount determining means for comparing the detected cool storage amount with a preset predetermined cool storage amount, a system-specific load amount detecting means for detecting an operating load amount in the second refrigerant circuit for each system, and a cool storage amount determination Stop system determination means for determining a system in which the cooling heat supply of the second refrigerant circuit should be stopped based on the comparison result by the means and the operating load amount for each system detected by the system-specific load amount detection means, and a stop system determination And a cooling operation stopping means for stopping the supply of cold heat to the system determined by the means.

According to a fourth aspect of the present invention, there is provided a combined refrigerant circuit control device for cooling a first compressor, a first condenser, a first expansion device, and a first cooled environment. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in a ring, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger and the heat storage refrigerant circuit in which the exchangers are sequentially connected. A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second environment to be cooled at a temperature lower than that of the first environment to be cooled. A second refrigerant circuit in which a second evaporator to be cooled is sequentially connected in an annular shape, and a second condenser of the second refrigerant circuit. When the first cold supply circuit with supply cold supply heat exchanger cold from the connected storage tank of the heat storage agent in the second refrigerant circuit between the second evaporator, the first
Is connected between the first condenser and the first expansion device of the refrigerant circuit, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is used as heat storage heat. A heat storage tank for controlling a composite refrigerant circuit facility having a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by bypassing the heat storage tank. The cool storage amount detecting means for detecting the cool storage amount stored in the agent, the cool storage amount determining means for comparing the detected cool storage amount with a preset predetermined cool storage amount, and the operating load amount in the first refrigerant circuit Cooling operation of the first refrigerant circuit based on the system-specific load amount detecting means for each system, the comparison result by the cool storage amount determining means, and the operation load amount for each system detected by the system-specific load amount detecting means Cold storage switching system determination to determine the system to be switched from cold storage to cold storage operation Stage and is made by and a cool cold-storage operation switching means for driving the circuit switchgear of the system determined by the cold storage switching system determining means switches the system to the cold-storage operation.

Further, in the composite refrigerant circuit control device according to a fifth aspect of the present invention, the first compressor, the first condenser, the first expansion device, and the first environment for cooling are cooled. A first refrigerant circuit formed by sequentially connecting the evaporators in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device and a heat storage heat exchanger in parallel with the first evaporator. First through the heat storage refrigerant circuit and the heat storage heat exchanger that are sequentially connected.
A heat storage tank containing a heat storage agent for storing cold heat corresponding to the difference between the maximum refrigerating capacity of the refrigerant circuit and the required refrigerating capacity of the first cooled environment, a second compressor, a second condenser, A second expansion device and a second refrigerant circuit of a plurality of systems in which a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment is sequentially connected in an annular shape; A heat exchanger for cold heat supply, which is connected between the second condenser and the second evaporator of the second refrigerant circuit, and supplies cold heat from the heat storage agent in the heat storage tank to the second refrigerant circuit. A cool storage amount detecting means for detecting a cool storage amount stored in a heat storage agent of a heat storage tank, and a detected cool storage amount, which are set in advance. Cool storage amount determination means for comparing the stored predetermined cool storage amount, and cooling to be consumed in each system of the second refrigerant circuit Cooling amount detection means by system, cooling amount storage means by system for storing the detected cooling amount of each system, comparison result by the cooling amount determination means and cooling amount storage means by system The operating system determining means for determining the system to which the cold heat of the second refrigerant circuit is to be supplied based on the cooling amount of each system being operated, and the cooling system for supplying the cold heat to the system determined by the operating system determining means. It is provided with a cold operation control means.

On the other hand, in the composite refrigerant circuit control device according to a sixth aspect of the present invention, the first compressor, the first condenser, the first expansion device, and the first environment for cooling are cooled. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit formed by sequentially connecting a second evaporator to be cooled in a ring shape, and a second condenser of the second refrigerant circuit. A composite refrigerant circuit having a first cold heat supply circuit having a cold heat supply heat exchanger connected to a second evaporator and supplying cold heat from a heat storage agent in a heat storage tank to the second refrigerant circuit. Cooling amount detecting means for controlling the equipment and detecting the amount of cold storage stored in the heat storage agent of the heat storage tank, and cold storage for predicting the amount of cold storage at a predetermined cold storage operation end time based on the detected amount of cold storage Amount calculating means, a cool storage completion amount determining means for comparing the cool storage amount at the predicted cold storage operation end time with a preset cool storage amount input in advance, and a priority order related to the system for the cold storage operation of the first refrigerant circuit. Is stored in the priority setting means, the priority storage means for determining the priority related to the set first refrigerant circuit system, the comparison result by the cool storage completion amount determination means, and the priority storage means. First cold based on priority and A stop line determining means for determining the system should be stopped cold-storage operation of the circuit is made by and a cold-storage operation control means for stopping the cold-storage operation of the determined by the stop line determining means lineage.

According to a seventh aspect of the present invention, there is provided a composite refrigerant circuit control device, wherein a first compressor, a first condenser, a first expansion device, and a first cooled environment are cooled. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit formed by sequentially connecting a second evaporator to be cooled in a ring shape, and a second condenser of the second refrigerant circuit. A first cold supply circuit having a cold feed heat exchanger to be supplied to the second refrigerant circuit cold from the connected storage tank of the heat storage agent between the second evaporator, the first
Is connected between the first condenser and the first expansion device of the refrigerant circuit, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is used as heat storage heat. A heat storage tank for controlling a composite refrigerant circuit facility having a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by diverting to the exchanger. Cold storage amount detection means for detecting the amount of cold storage stored in the agent, cold storage amount calculation means for predicting the amount of cold storage at the predetermined cold storage operation end time based on the detected amount of cold storage, and the predicted cold storage operation end time The cool storage completion amount determining means for comparing the cool storage amount with the preset cool storage amount that has been input in advance, and the priority setting means for setting the priority order of the system for the cooling operation of the first refrigerant circuit are set. A priority record that stores the priority of the first refrigerant circuit system Means, and a cold discharge switching system for determining a system to be switched from the cold storage operation to the cold discharge operation of the first refrigerant circuit based on the comparison result by the cool storage completion amount determination means and the priority order stored in the priority order storage means. It comprises a determining means and a cold storage cooling operation switching means for driving the circuit switchgear of the system determined by the cooling switching system determining means to switch the system to the cooling operation.

Further, in the composite refrigerant circuit control device according to the present invention, the first compressor, the first condenser, the first expansion device, and the first environment for cooling are cooled. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit in which a second evaporator to be cooled is sequentially connected in an annular shape, and a second condenser of the second refrigerant circuit. And a second evaporator, and a first cold heat supply circuit having a cold heat supply heat exchanger for supplying cold heat from the heat storage agent in the heat storage tank to the second refrigerant circuit It controls circuit equipment, and predicts the cold storage amount at a predetermined cold storage operation end time based on the cold storage amount detection means for detecting the cold storage amount stored in the heat storage agent of the heat storage tank and the detected cool storage amount. A cool storage amount calculating means, a cool storage completion amount determining means for comparing the cool storage amount at the predicted cold storage operation end time with a preset cool storage amount input in advance, and an operating load amount in the first refrigerant circuit is detected for each system. The cold storage operation of the first refrigerant circuit should be stopped based on the system-specific load amount detection means, the comparison result by the cool storage completion amount determination means, and the operation load amount for each system detected by the system-based load amount detection means. Stop system determination means for determining the system, Those formed by and a cold-storage operation stopping means for stopping the cold-storage operation of the stop line is determined by the determining means lineage.

According to a ninth aspect of the present invention, there is provided a combined refrigerant circuit control device, wherein the first compressor, the first condenser, the first expansion device, and the first cooled environment are cooled. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second environment to be cooled at a temperature lower than that of the first environment to be cooled. A second refrigerant circuit in which a second evaporator to be cooled is sequentially connected in an annular shape, and a second condenser of the second refrigerant circuit. When the first cold supply circuit with supply cold supply heat exchanger cold from the connected storage tank of the heat storage agent in the second refrigerant circuit between the second evaporator, the first
Is connected between the first condenser and the first expansion device of the refrigerant circuit, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is used as heat storage heat. A heat storage tank for controlling a composite refrigerant circuit facility having a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by diverting to the exchanger. Cold storage amount detection means for detecting the amount of cold storage stored in the agent, cold storage amount calculation means for predicting the cold storage amount at a predetermined cold storage operation end time based on the detected cold storage amount, and the predicted cold storage operation end time Cold storage completion amount determination means for comparing the cold storage amount with a preset cold storage amount input in advance, system-specific load amount detection means for detecting the operating load amount in the first refrigerant circuit for each system, and cold storage completion amount determination means It is detected by the comparison result by Cooling switching system determining means for determining the system to be switched from the cold storage operation to the cooling operation of the first refrigerant circuit based on the operating load of each system, and the circuit of the system determined by the cooling switching system determining means It is provided with a cold storage cooling operation switching means for driving the switchgear to switch the system to cooling operation.

According to a tenth aspect of the present invention, there is provided a combined refrigerant circuit control device, comprising: a first compressor, a first condenser, a first expansion device, and a first cooling environment for cooling a first environment. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit in which a second evaporator to be cooled is sequentially connected in an annular shape, and a second condenser of the second refrigerant circuit. And a second evaporator, and a first cold heat supply circuit having a cold heat supply heat exchanger for supplying cold heat from the heat storage agent in the heat storage tank to the second refrigerant circuit This is for controlling the circuit equipment, and the cooling amount detection means for detecting the cooling amount from the heat storage agent in the heat storage tank and the detected cooling amount are integrated to calculate the cooling amount for one day. Cooling amount calculating means, priority setting means for setting a priority order related to the system for the cold storage operation of the first refrigerant circuit, and priority order for storing the priority order related to the set first refrigerant circuit system. 1 calculated by the storage means and the cooling amount calculation means
It is determined by the operating system determining unit and the operating system determining unit that determines the system to perform the cold storage operation of the first refrigerant circuit based on the daily cooling amount and the priority stored in the priority storing unit. It is provided with a cold storage operation stopping means for performing cold storage operation of the system.

According to the composite refrigerant circuit control device of the present invention, the first compressor, the first condenser, the first expansion device, and the first environment for cooling are cooled. A plurality of systems of first refrigerant circuits in which evaporators are sequentially connected in an annular shape, a first expansion device in the first refrigerant circuit, and a heat storage expansion device in parallel with the first evaporator, and heat storage heat Cooling heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat accumulating heat exchanger and the refrigerant circuit for accumulating heat which is sequentially connected A heat storage tank containing a heat storage agent for storing the heat, a second compressor, a second condenser, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit in which a second evaporator to be cooled is sequentially connected in an annular shape, and a second condenser of the second refrigerant circuit. And a second evaporator, and a first cold heat supply circuit having a cold heat supply heat exchanger for supplying cold heat from the heat storage agent in the heat storage tank to the second refrigerant circuit It controls the circuit equipment, and compares the cool storage amount detecting means for detecting the cool storage amount of the heat storage agent at the predetermined cooling operation end time with the detected cool storage amount and preset preset cool storage amount. With the excess cold storage amount calculation means for calculating the excess cold storage amount, the system-specific cold storage capacity detection means for detecting the cold storage capacity for each system, and the excess cold storage amount and the system-specific cold storage capacity detection means calculated by the excess cold storage amount calculation means. A cold storage operation system determining unit that determines a system to perform the cool storage operation of the first refrigerant circuit based on the detected cool storage capacity of each system, and a cool storage operation that performs the cool storage operation of the system determined by the cool storage operation system determining unit With control means Is shall.

[0030]

In the present invention, the priority order setting means and the priority order storage means set and store the priority order in each of a plurality of refrigerant circuit systems. When the stop system determining means determines that the amount of cold storage in the heat storage tank is insufficient, the cooling operation stopping means stops the cooling operation in order from the system with the lowest priority. Therefore, even when the amount of cold storage is insufficient, the cooling operation can be stopped from the system with a higher priority. That is, it is possible to minimize the loss due to the reduction of the cooling capacity of the object to be cooled which has a great influence. This improves the reliability of the equipment as a whole.

Further, based on the cool storage amount of the heat storage tank detected and compared by the cool storage amount detecting means and the cool storage amount determining means,
When it is determined that the cold storage amount is further insufficient, the cold storage switching system determination means determines a system having a low priority set and stored in advance by the priority setting means and the priority storage means, and the cold storage cold storage operation switching means is set. The low priority system is switched from cold storage operation to cold storage operation. This allows
The shortage of cold storage can be supplemented. Therefore, the reliability of the entire equipment can be further improved.

Further, the heat storage tank detected and compared by the cold storage amount detection means and the cold storage amount determination means with the operation load amount corresponding to, for example, the condenser inlet refrigerant temperature of each system detected by the system-dependent load amount detection means. When it is predicted that the cold storage amount will be insufficient based on the cold storage amount, the cooling operation stopping means stops the cooling operation from the system determined by the stop system determining means, for example, the system having a small operation load amount. Therefore, the cooling operation can be performed only in the required system. for that reason,
While the stored cold heat can be used efficiently, the capacity of the heat storage tank can be reduced.

The operation load amount of the system during the cold discharge operation detected by the load amount detecting means for each system and the cool storage amount of the heat storage tank detected and compared by the cool storage amount detecting means and the cool storage amount determining means are also included. When it is determined that the cool storage amount is insufficient, the cold storage cool storage operation switching means causes the system having a large operating load amount determined by the stop system determining means to perform the cool operation, and sets the system having a small operating load amount. Switch to cold storage operation. Therefore, even when the operating load varies greatly, the cold storage amount is replenished and the shortage is eliminated, and the adverse effect on the object to be cooled due to the insufficient cooling capacity is suppressed as much as possible.

Further, for example, the cool storage amount of the heat storage tank detected and compared by the cool storage amount detecting means and the cool storage amount determining means based on the refrigerant pressure and the compressor operating time during the cool storage operation, and the cold discharge amount detecting means by system And the operating system determination means determines the system in which the cooling operation is possible based on the cooling amount in each system detected and stored by the system-specific cooling amount storage means. Then, the cooling operation control means supplies cold heat to the determined system. Therefore,
The shortage of the cold storage amount does not occur before the predetermined cooling operation end time, and the supply stability of the cooling capacity is improved.

On the other hand, when the cool storage operation is completed before the predetermined cool storage operation end time, based on the cool storage amount of the heat storage tank at the predetermined cool storage operation end time detected and calculated by the cool storage amount detection means and the cool storage amount calculation means. When it is determined by the cool storage completion amount determination means, the stop system determination means determines that the system having a low priority order for stopping the cool storage operation preset and stored by the priority setting means and the priority storage means (for example, operating load). A system having a small fluctuation in the amount or a system having a large amount of the object to be cooled is determined, and the cold storage operation control means preferentially stops the cold storage operation from the system having the lower priority. Therefore,
Cold storage operation can be performed with a small amount of required power.

Further, when the cold storage operation is completed before the predetermined cold storage operation end time, based on the cold storage amount of the heat storage tank at the predetermined cold storage operation end time detected and calculated by the cold storage amount detection means and the cold storage amount determination means. When it is judged by the cool storage completion amount judging means, the cold discharge switching system judging means decides a system having a high priority to be switched to the cold discharge operation preset and stored by the priority setting means and the priority storing means. The cold storage operation control means switches the cold storage operation to the cold discharge operation from the system having the determined higher priority. Therefore, both the cold storage operation with a small required power and the cooling operation according to the importance of the object to be cooled can be compatible.

Further, when the cool storage operation is completed before the predetermined cool storage operation end time based on the cool storage amount of the heat storage tank at the predetermined cool storage operation end time detected and calculated by the cool storage amount detection means and the cool storage amount determination means. When it is judged by the cool storage completion amount judging means, the stopped grid judging means determines a grid with a low running load based on the running load of each grid detected by the grid load detecting means based on the actual operating state. Then, the cold storage operation stopping means preferentially stops the cold storage operation from the system having the determined low operation load amount. Therefore, the cold storage operation can be performed by using the system having the high cold storage operation efficiency. Thereby, the cold storage operation can be performed with less required power.

When the cool storage operation is completed before the predetermined cool storage operation end time based on the cool storage amount of the heat storage tank at the predetermined cool storage operation end time detected and calculated by the cool storage amount detection means and the cool storage amount determination means. When it is judged by the cool storage completion amount judging means, based on the actual operation state, the cold load switching system judging means, based on the operating load amount of each system detected by the load detecting means for each system, changes from the cool storage operation to the cool operation. The system to be switched to is determined, and the cold storage / cooling operation switching means switches the determined system to the cooling operation. That is, a system having a high operation load amount is automatically switched from the cold storage operation to the cold discharge operation even during the cold storage operation. Therefore, it is possible to cope with a sudden change in the operation load amount, and the reliability of the entire equipment is improved.

Further, the cooling amount for one day detected and calculated by the cooling amount detecting means and the cooling amount calculating means, and the priority order preset and stored by the priority setting means and the priority storing means. On the basis of the above, the operating system determination means determines only the system having the cold storage capacity corresponding to the calculated amount of cold radiation for one day, and the cold storage operation control means performs the cold storage operation of the determined system. As a result, the cold storage operation time can be suppressed to the necessary minimum.

Further, based on the surplus cool storage amount at the predetermined end time of the cooling operation calculated by the cool storage amount detecting means and the surplus cool storage amount determining means, and the cool storage capacity for each system detected by the system-specific cool storage capacity detecting means. Then, the cold storage operation system determination means determines the system for the cold storage operation. Then, the cool storage operation control unit causes the determined system to perform the cool storage operation, and for example, does not allow the system having the cool storage capacity corresponding to the surplus cool storage amount to perform the cool storage operation. Thereby, it is not necessary to perform the cold storage operation more than necessary, and thus the cold storage operation time can be suppressed to the necessary minimum.

[0041]

[Embodiments] Of the embodiments described below, Embodiments 1 to 5 relate to control for effectively using the stored cold storage amount. Example 1. FIG. 1 is a block diagram showing a composite refrigerant circuit facility and its control device according to Examples 1 to 11 of the invention.
In the figure, the composite refrigerant circuit equipment of each example is shown in FIG.
It has the same configuration as the composite refrigerant circuit equipment shown in FIG.
The same components as those of the complex refrigerant circuit facility of No. 6 are denoted by the same reference numerals, and the description thereof will be omitted. However, the composite refrigerant circuit equipment of each of the embodiments described below is provided with a control device 38 for efficiently controlling the entire equipment. The control device 38 is mainly configured by a central processing unit (CPU) (not shown), and a processing flow (each processing step) for realizing the function of each means of the control device according to the present invention in Examples 1 to 11 described later. Respectively S
(Denoted by 101, S102, S103, ...) As program data (not shown)
And so on.

FIG. 2 is a block diagram showing the control system of the controller for the composite refrigerant circuit equipment according to the first embodiment of the present invention. In the figure, 47 is water (heat storage agent) in the heat storage tank 7.
Sensor for detecting the water level, differential pressure, etc., 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to the signal from the sensor 47, and 42 is a preset cooling operation end The cool storage amount determination means for determining whether or not the cool storage amount is insufficient by the time and outputting a signal when it is determined to be insufficient, 43 is the importance of the stored object to be cooled for each connected system. Therefore, 44 is a priority order setting means for setting a priority order for supplying cold heat, 44 is a priority order storage means for storing the set priority order, and 45 is a priority order storage means 44 in response to a signal from the cool storage amount determination means 42. Stop system determination means for reading the stored priority order, determining the system to stop the cold heat supply (cooling operation), and outputting the result, 46 is a system which receives the output from the stop system determination means 45 Cooling operation stop means for outputting a stop signal to, 48 is a cooling operation stop actuator for stopping the cooling operation of the system in question receives a stop signal.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. The signal detected by the sensor 47 is converted into the cool storage amount S _P by the cool storage amount detecting means 41 (S101). Next, the calculated cool storage amount S _P and the preset set cool storage amount S _S are compared by the cool storage amount determination means 42 (S102). Here, when the set cool storage amount S _S <the cool storage amount S _P , the operations of steps S101 to S102 are repeated. On the other hand, if the set cool storage amount S _S > the cool storage amount S _P , step S103
At the stop level (priority level) P
_P is determined. This stop level P _P is output as a number of 3 to 5 levels. In step S104, the stored set value (priority order) P _Sn (n (number of systems) = 1 for each system)
~ N) is read from the priority storage means 44. In step S105, the read set value P _Sn for each system and the stop level P _P determined in step S103
And _Ps1 are sequentially compared by the stop system determination means 45. At this time, if the system-specific set value P _Sn <stop level P _P , the next system is instructed in step S108, and the processes of steps S104 to S105 are repeated. On the contrary, if the set value P _{Sn for} each system> the stop level P _P , the process for stopping the cooling operation of the corresponding system is executed by the cooling operation stopping means 46 and the cooling operation stopping actuator 48 in step S106. . This is because the system to be operated is n
This is repeated until the system is established (S107). The setting / storing operation of the set value P _Sn for each system is as in steps S111 to S113 shown in FIG.

As a result, even if the amount of cold storage becomes large and the amount of cold storage becomes insufficient, the cooling operation is stopped in order from the system with the lowest priority. There is no loss due to a rise in temperature, and the efficiency of the entire system is improved. In addition, it is not necessary to increase the amount of cold storage in consideration of the safety factor, and the heat storage tank can be made as small as necessary.

Example 2. FIG. 5 is a block diagram showing a control system of a control device for a composite refrigerant circuit facility according to a second embodiment of the present invention. In the figure, 47 is a sensor for detecting the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. , 42 determines whether or not the amount of cold storage is insufficient by a preset cooling operation end time, and outputs a signal when it is determined that the amount of cold storage is insufficient, 49 is each connected system Further, the priority setting means for setting the priority for supplying cold heat in accordance with the importance of the stored objects to be cooled, 50 is a priority storage means for storing the set priority, and 51 is a cool storage amount judging means 42. In response to the signal, the stored priority order is read out from the priority order storage means 50, a system for determining a cold storage switching system for determining a system to be switched from the cold storage operation to the cold storage operation and outputting the result, and 52 is a cold storage switching system. Cool cold-storage operation switching means for outputting a switching signal according to a system in response to an output from the determination means 51, 53 is a driving switching actuator for switching the cold-storage operation from left to cool driving system in question receives a switching signal.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. First, the signal detected by the sensor 47 is converted into the cool storage amount S _P by the cool storage amount detecting means 41 (S121). Next, the calculated cool storage amount S _P and the preset set cool storage amount S _S are compared by the cool storage amount determination means 42 (S122).
At this time, when the set cool storage amount S _S <the cool storage amount S _P , the operations of steps S121 to S122 are repeated. On the other hand, when the set cool storage amount S _S > the cool storage amount S _P , the switching level P _P is determined in step S123. This switching level P _P is output in the number of 3 to 5 levels. In step S124, the stored set value P _Sn for each system is read from the priority order storage unit 50. In step S125, the read set value P _Sn for each system and the switching level P _P determined in step S123 are sequentially compared from P _S1 by the cold storage switching system determining means 51. If the system-specific set value P _Sn <the switching level P _P , the next system is designated in step S128, and the processes of steps S124 to S125 are repeated. On the other hand, if the set value P _{Sn for} each system> the switching level P _P ,
In step S126, the processing for switching the cold storage operation of the corresponding system to the cold storage operation is executed by the cold storage operation of the cold storage operation 52 and the operation switching actuator 53. This is repeated until the number of systems to be calculated becomes n (S126).

As a result, even when the amount of cold storage becomes large and the amount of cold storage becomes insufficient, the cold storage operation is switched in order from the system with the lowest priority, so that the temperature in a showcase containing an important object to be cooled can be improved. The efficiency of the entire system is improved without incurring the loss due to the increase of. In addition, it is not necessary to increase the amount of cold storage in consideration of the safety factor, and the heat storage tank can be made as small as necessary.

Example 3. FIG. 7 is a block diagram showing a control system of a control device for composite refrigerant circuit equipment according to a third embodiment of the present invention. In the figure, 47 is a sensor for detecting the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. , 42 determines whether or not the cool storage amount is insufficient by a preset cooling operation end time, and outputs a signal when it is determined that the cool storage amount is insufficient, and 54 is for each connected system Further, 55 is a sensor for detecting pressure, temperature, etc., 55 is a system-specific load amount detecting means for calculating and detecting a load amount for each system based on a signal from the sensor 54, and 56 is a signal from the cool storage amount judging means 42. A stop system determination unit that determines a system to be stopped and outputs the result based on a signal from the system-dependent load amount detection unit 55, and 57 receives the output from the stop system determination unit 56 and outputs a stop signal for each system. Freezing luck Stop means, 48
Is a cooling operation stop actuator that receives a stop signal and stops the cooling operation of the corresponding system.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. The signal detected by the sensor 47 is converted into the cool storage amount S _P by the cool storage amount detecting means 41 (S131) and stored in the system-specific load amount storing means (not shown). Next, the calculated cool storage amount S _P and the preset set cool storage amount S _S are the cool storage amount determining means 42.
Are compared with each other (S132). And the set cold storage amount S
_{If S} <Cold storage amount S _P , steps S131 to S13
The operation of 2 is repeated. On the other hand, when the set cool storage amount S _S > the cool storage amount S _P , the stop level P _P related to the system to be stopped is determined in step S133. This stop level P _P is output as a number of 3 to 5 levels. In step S134, the load amounts L _{P1 to} L _Pn are read for each system. In step S135, the read load amount L _Pn for each system and the stop level P _P determined in step S133 are sequentially compared by the stop system determining means 56. At this time, load amount L _{Pn for each} system <stop level P
If it is _P , the next system is designated in step S138, and the processes of steps S134 to S135 are repeated. On the contrary, if the load amount L _{Pn for each} system> the stop level P _P , the process of stopping the cooling operation of the corresponding system is executed by the cooling operation stopping means 57 and the cooling operation stopping actuator 48 in step S136. It This is repeated until the number of systems to be operated becomes n (S13).
7). The operation of detecting and storing the load amount L _Pn for each system is as in steps S131a to S133a shown in FIG.

As a result, even if the amount of cold storage becomes large and the amount of cold storage becomes insufficient, the cold storage operation is stopped from the system with a small load, so that the amount of cold storage can be used only for the required showcase. Therefore, the efficiency of the entire system is improved. In addition, it is not necessary to increase the amount of cold storage in consideration of the safety factor, and the heat storage tank can be made as small as necessary. The operating state detection elements for obtaining the load amount include, for example, the refrigerant suction pressure of the compressor, the operating time of the compressor, the opening / closing output of the load side solenoid valve,
Alternatively, the pressure difference between the refrigerant evaporation pressure and the set pressure of each system can be used.

Example 4. FIG. 10 is a block diagram showing a control system of a control device for composite refrigerant circuit equipment according to Embodiment 4 of the present invention. In the figure, 47 is a sensor for detecting the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. , 42 determines whether or not the cool storage amount is insufficient by a preset cooling operation end time, and outputs a signal when it is determined that the cool storage amount is insufficient, and 54 is for each connected system For detecting the pressure and temperature of the system, 60 is a load amount detection means for each system that calculates and detects the load amount for each system based on the signal from the sensor 54, and 61 is a signal from the cold storage amount determination means 42 Based on the comparison result of the priority order to switch to the cold storage operation read from the priority order storage means (not shown) and the load amount for each system detected by the system-specific load amount detection means 60, the cold discharge operation to the cool storage operation is performed. Switch to operation Cold storage switching system determining means for outputting the result to determine the Rubeki system,
Reference numeral 62 denotes a cold-cooling cold storage operation switching means that receives an output from the cold storage switching system determination means 61 and outputs a switching signal for each system, and 53 is an operation switching actuator that receives the switching signal and switches the corresponding system from cold-cooling operation to cold storage operation. Is.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. Sensor 47
The signal detected by is stored in the cold storage amount detecting means 41 and converted into the cold storage amount S _P (S141). Next, the calculated cool storage amount S _P and the preset cool storage amount S _S are compared by the cool storage amount determining means 42 (S142). Here, when the set cool storage amount S _S <the cool storage amount S _P , the operations of steps S141 to S142 are repeated. On the contrary, if the set cool storage amount S _S > the cool storage amount S _P , step S143
At, the switching level P _P is determined. The switching level P _P is output as a number of 3 to 5 levels. Step S
At 144, the load amounts L _{P1 to} L _Pn are read for each system. In step S145, the read load amount L _Pn for each system and the switching level P determined in step S143.
_P is compared with _P by the cold storage switching system determination means 61.
At this time, load amount L _{Pn for} each system <switching determination level P
If it is _P , the next system is instructed in step S148, and the processes of steps S144 to S145 are repeated. On the other hand, load amount L _{Pn for each} system> switching determination level P _P
If so, the process of switching the cold storage operation from the cold storage operation to the cold storage operation is executed by the cold storage operation in the cold storage operation 62 and the operation switching actuator 53 in step S146. This is repeated until the number of systems to be calculated becomes n (S147).

As a result, even if the amount of cold storage becomes large and the amount of cold storage becomes insufficient, the system with a small load is switched to the cold storage operation. The efficiency of the entire system is improved without incurring the loss due to the rise.
In addition, it is not necessary to increase the amount of cold storage in consideration of the safety factor, and the heat storage tank can be made as small as necessary.

Example 5. FIG. 12 is a block diagram showing the control system of the control device for the composite refrigerant circuit facility according to the fifth embodiment of the present invention. In the figure, 47 is a sensor for detecting the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. , 42 is a cool storage amount determining means for calculating a cool storage amount at a preset cool storage operation end time, 63 is a system-specific cool discharge amount setting means for setting and inputting a cool discharge amount for each connected system, and 64 is set. A system-specific cooling amount storage means for storing the cooling amount for each system, 65 is a signal from the cold storage amount determining means 42 and a system-specific cooling amount storage device 64
Based on the cooling amount for each system read from the system, an operating system determining unit that determines a system to perform cold heat supply (cooling operation) and outputs the result, 66 is an operating system determining unit 6
Cooling operation control means for receiving the output from 5 and outputting a cooling operation switching signal for each system, and 58 is an operation start actuator for receiving the operation switching signal and starting the cooling operation of the corresponding system. Note that the cooling amount for each system is not necessarily set and stored in advance, but for example, the amount detected by the system-specific cooling detection means (not shown) provided for each system can be used as it is for calculation. Good.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. Sensor 47
The signal detected by is stored in the cool storage amount detecting means 41 and converted into the cool storage amount S _P (S151). Next, the preset system-specific cooling amount D _n (in order from n = 1) is read from the system-specific cooling amount storage means 64 (S152) and summed up to obtain the total cooling amount D _T. (S15
3). Steps S154, S155, and S156 are a combination in which the total cooling amount D _T when combining the system-specific cooling amounts D _{1 to} D _n with an arbitrary number (in order from n = 1) is closest to the cool storage amount S _P. This is a processing procedure for selecting and determining the system. In step S157, in response to the determination result from step S156, the cooling operation control means 66 and the operation start actuator 58 start the cooling operation of the relevant system.

As a result, even if the amount of cold storage is insufficient, the amount of cold storage does not become insufficient during the cooling operation time, so that the temperature rises in a showcase containing an important object to be cooled. It does not suffer losses and increases the efficiency of the overall system. In addition, it is not necessary to increase the amount of cold storage in consideration of the safety factor, and the heat storage tank can be minimized.

On the other hand, Examples 6 to 11 relate to control for efficiently storing cold heat in the heat storage agent. Example 6. FIG. 14 is a block diagram showing a control system of a control device for a composite refrigerant circuit facility according to a sixth embodiment of the present invention. In the figure, 47 is a sensor for detecting the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detecting means for calculating and detecting the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. , 70 is a cool storage amount calculating means for calculating the amount of change in the cool storage amount, 71 is a judgment as to whether or not a predetermined cool storage amount can be obtained within a predetermined operating time, and when a predetermined cool storage amount can be obtained. Is a means for determining the amount of completed cold storage for outputting the result, 72 is a priority setting means for setting a priority for performing the cold storage operation for each connected system, and 73 is a priority storage for storing the set priority. A means, 74 receives the signal from the cool storage completion amount determining means 71, reads the priority order stored in the priority order storing means 73, determines a system for stopping the cold storage operation, and outputs the result. hand Reference numeral 75 denotes a cool storage operation control means for receiving an output from the stop system determining means 74 and outputting a stop signal for the cool storage operation for each system, and 76 denotes a cool storage operation stop actuator for receiving the stop signal and stopping the cool storage operation of the corresponding system. is there.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. Sensor 47
The signal detected by is stored in the cool storage amount detecting means 41 and converted into a cool storage amount (S161). Next, a change in the cool storage amount per unit time is calculated by the cool storage amount calculating means 70, and from this change, the cool storage operation end time (for example, 8:00 on the next day).
The amount S ₂ of cold storage in is calculated as a predicted amount (S16
2). Then, the calculated cool storage amount S ₂ and the planned cool storage amount S _{1 at the} end time of the cool storage operation are used to determine the cool storage completion amount 71.
Are compared by (S163), in the case of S ₂ ≦ S ₁ operating step S161~S163 are repeated. On the contrary, when S ₂ > S ₁ , the priority order for each system is read from the priority order storage unit 73 in step S164. Then, the system for stopping the cold storage operation is determined by the stop system determining means 74, and a stop signal is output (S1).
65), the cold storage operation of the corresponding system is the cold storage operation control means 7
5 and the cold storage operation stop actuator 76 are stopped (S166).

As described above, when the cold storage amount becomes larger than the predicted amount, the cold storage operation is stopped in order from the system having the lowest cold storage operation efficiency, and the cold storage operation is performed by the system having the highest efficiency. Will be more efficient.

Example 7. FIG. 16 is a block diagram showing the control system of the control device for the composite refrigerant circuit facility according to the seventh embodiment of the present invention. In the figure, 47 is a sensor that detects the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detection that calculates and detects the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. A means, 70 is a cool storage amount calculating means for calculating the amount of change in the cool storage amount, and 71 is a judgment as to whether or not a predetermined cool storage amount can be obtained within a predetermined operating time, and a predetermined cool storage amount can be obtained. In this case, the cool storage completion amount determining means for outputting the determination result, 72 is a priority setting means for setting the priority order for performing the cool storage operation for each connected system, and 73 is storing the set priority order for each system. Upon receiving a signal from the cool storage completion amount determination means 71, the priority storage means 82 reads out the priority stored in the priority storage means 73, and determines the system for switching from the cold storage operation to the cold discharge operation. To Forces cool switching system determining unit, 83 cool the switching system determining means 82
Cooling storage cooling operation switching means for outputting a switching signal from the cold storage operation to the cooling operation for each system in response to an output from the system, and 84 is a cooling storage cooling operation for receiving the switching signal and switching the corresponding system from the cold storage operation to the cooling operation It is a switching actuator.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. First, the signal detected by the sensor 47 is converted into the amount of cold storage by 41 (S171). Then, from the change in the cool storage amount per unit time, the cool storage operation end time (for example,
The cold storage amount S ₂ at the time) is calculated by the cold storage completion amount determination means 70 (S172). Then, the calculated cool storage amount S ₂ and the planned cool storage amount S _{1 at the} end time of the cool storage operation are compared by the cool storage completion amount determining means 71 (S173), S
_{When 2} ≦ S ₁ , the operations of steps S171 to S173 are repeated. On the contrary, when S ₂ > S ₁ , the priority order for each system is read from the priority order storage unit 73 in step S174. Then, in step S175, the system to be switched from the cold storage operation to the cold discharge operation is determined by the cold discharge switching system determination means 82 and a switching signal is output, and the corresponding system is cooled cold discharge operation switching means 83 and cold storage cold discharge switching. The cold storage operation is switched to the cold discharge operation by the actuator 84 (S176).

In this way, when the amount of cold storage increases, the cooling operation is switched from the system having the highest priority to the cooling operation in order, so that the efficiency of the entire system is improved.

Example 8. FIG. 18 is a block diagram showing the control system of the control device for the composite refrigerant circuit facility according to the eighth embodiment of the present invention. In the figure, 47 is a sensor that detects the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detection that calculates and detects the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. A means, 70 is a cool storage amount calculation means for calculating the amount of change in the cool storage amount, and 71 is a judgment as to whether or not a predetermined cool storage amount can be obtained within a predetermined operating time, and a predetermined cool storage amount can be obtained. If possible, the cool storage completion amount determination means for outputting the determination result, 54 is a sensor for detecting an operating state such as refrigerant pressure and temperature of each connected system, and 77 is a load amount for each system based on a signal from the sensor 54. Load amount detection means for each system for calculating
Reference numeral 78 is a stop system determining means for receiving a signal from the cool storage completion amount determining means 71, determining a system for stopping the cool storage operation based on the output from the system load amount detecting means 77, and outputting the result, 79 Is a cold storage operation stopping means for receiving the output from the stop system determining means 78 and outputting a stop signal for the cold storage operation for each system, and 80 is a cold storage operation stop actuator for receiving the stop signal and stopping the cold storage operation of the corresponding system.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. Sensor 47
The signal detected by is stored in the cold storage amount detecting means 41 and converted into a cold storage amount (S181). Next, from the change in the cool storage amount per unit time, the cool storage operation end time (for example,
The cool storage amount S ₂ at 8:00 on the next day is the cool storage amount calculating means 70.
Is calculated by (S182). Then, the calculated cool storage amount S ₂ and the planned cool storage amount S _{1 at the} end time of the cool storage operation are compared by the cool storage completion amount determination means 71 (S18).
3), if S ₂ ≦ S ₁ , steps S181 to S18
The operation of 3 is repeated. On the contrary, if S ₂ > S ₁ , then the cold storage operation load amount for each system is detected by the load amount detecting means for each system 77 in step S184. In step S185, the system in which the cold storage operation is to be stopped in order from the largest load is determined by the stop system determination means 78, and the cold storage operation stop signal is output. The operation stop actuator 80 stops the operation (S186).

In this way, when the cool storage amount becomes large, that is, when the cool storage is completed within a predetermined cool storage operation time, the cool storage operation can be stopped from the system having a high refrigerant evaporation pressure, for example. , The efficiency of the whole system is improved.

Example 9. FIG. 20 is a block diagram showing the control system of the control device for the composite refrigerant circuit facility according to Embodiment 9 of the present invention. In the figure, 47 is a sensor that detects the water level, differential pressure, etc. of the water in the heat storage tank 7, and 41 is a cool storage amount detection that calculates and detects the cool storage amount stored in the heat storage tank 7 in response to a signal from the sensor 47. A means, 70 is a cool storage amount calculating means for calculating the amount of change in the cool storage amount, and 71 is a judgment as to whether or not a predetermined cool storage amount can be obtained within a predetermined operating time, and a predetermined cool storage amount can be obtained. In this case, the cool storage completion amount determining means for outputting the determination result, 54 is a sensor for detecting an operating state such as refrigerant pressure and temperature of each connected system, and 77 is a load amount for each system based on a signal from the sensor 54. Load amount detection means for each system to be calculated, 8
Reference numeral 1 denotes a cold radiation switching system that receives a signal from the cold storage completion amount determination means 71 and determines the system to switch from the cold storage operation to the cold radiation operation based on the output from the system load amount detection means 77 and outputs the result. Determining means, 83 receives the output from the cold radiation switching system determining means 81, and outputs a switching signal from the cold storage operation to the cold radiation operation for each system. 2 is a cold storage / cooling switching actuator for switching from the cold storage operation to the cold storage operation.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. First, the signal detected by the sensor 47 is converted and calculated by the cold storage amount detecting means 41 into the cold storage amount (S191). Next, the cool storage amount S ₂ at the cool storage operation end time (for example, 8:00 on the next day) is calculated by the cool storage amount calculation means 70 from the change in the cool storage amount per unit time (S192). Then, the calculated cool storage amount S ₂ and the planned cool storage amount S _{1 at the} end time of the cool storage operation are compared by the cool storage completion amount determination means 71 (S 1
93), if S ₂ ≦ S ₁ , steps S191 to S1
The operation of 93 is repeated. On the contrary, when S ₂ > S ₁ , in step S 194, the system-by-system cold storage operation load amount is detected by the system-by-system load amount detection means 77, and step S
At 195, the systems for which the cold storage operation should be stopped in order from the largest load are determined by the cold radiation switching system determination means 81 and an operation switching signal is output, and the corresponding systems are cooled cold radiation operation switching means 83 and cold energy storage. The cold switching actuator 84 switches the cold storage operation to the cold discharge operation (S
196).

As described above, when it is determined that the cold storage is completed even during the cold storage operation, the system with a high load amount (for example, the system with a high refrigerant evaporation pressure) can be switched to the cooling operation. , The efficiency of the entire system is improved.

Example 10. 22 shows a first embodiment of the present invention.
It is a block block diagram which shows the control system of the control apparatus of the composite type refrigerant circuit installation by 0. In the figure, 85 is a sensor for detecting the operating conditions such as the refrigerant temperature, pressure, and operating time for each system, 86 is a cooling amount detecting means for calculating and detecting the cooling amount in response to a signal from the sensor 85, 87 Is a cooling amount calculation means for calculating the cooling amount for one day by integrating the cooling amount detected by the cooling amount detecting means 86, and 88 is a priority order for performing the cold storage operation for each connected system. Priority setting means for setting the priority order, 89 is a priority order storage means for storing the set priority order, and 90 is a signal from the cooling amount selection means 87 to read the priority order from the priority order storage means 89 to store the cold storage. An operation system determining unit that determines a system to be operated and outputs the result, 91 is a cold storage operation control unit that receives an output from the operation system determining unit 90 and outputs a cold storage operation signal for each system, and 92 is a cold storage operation signal Received and accumulated A cold-storage operation actuator starts operation.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. Sensor 85
The signal detected by is calculated and converted by the cooling amount detecting means 86 into the cooling amount (S201). Subsequently, the cooling amount detecting means 87 integrates the cooling amount per unit time to calculate the cooling amount at the cooling operation end time (for example, 22:00) (S202). These processes are repeated until the cooling operation end time is reached (S201 to S203). In step S204, the priority for each system is the priority storage means 8
9, the system for the cold storage operation is determined by the operation system determination means 90, and the cold storage operation start signal is output (S205). Upon receiving the cold storage operation start signal, the cold storage operation of the corresponding system is started by the cold storage operation control means 91 and the cold storage operation actuator 92 (S206).

As described above, when the amount of cooling air is reduced, the cold storage operation can be performed only in the system having a high priority, so that the efficiency of the entire system is improved.

Example 11. FIG. 24 shows the first embodiment of the present invention.
2 is a block configuration diagram showing a control system of the control device for the composite refrigerant circuit facility according to FIG. 1. FIG. In the figure, 47 is a sensor for detecting the water level and differential pressure of the water in the heat storage tank 7, 93 is a cool storage amount detecting means for calculating and detecting the cool storage amount of the heat storage tank 7 in response to a signal from the sensor 47, 94 Is a storage amount detecting means 9
3. A surplus cold storage amount calculating means for calculating a surplus cold storage amount by comparing the cool storage amount detected in 3 with a predetermined cool storage amount calculated in advance, and a sensor 95 for detecting an operating state such as refrigerant pressure and temperature for each system. , 96 are system-specific cold storage capacity detecting means for calculating the cool storage capacity of each connected system based on the signal from the sensor 95, and 97 are output results from the surplus cold storage amount calculating means 94 and the system-specific cold storage capacity detecting means 96. A cold storage operation system determination means for determining a system to perform a cool storage operation more, a reference numeral 98 denotes a cold storage operation control means for receiving an output from the cold storage system determination means and outputting a cool storage operation signal for each system, and a reference numeral 99 corresponds to a cold storage operation signal. It is a cold storage operation actuator that starts cold storage operation of the system.

Next, the operation of the control device 38 in this embodiment will be described with reference to FIG. First, the system-based cold storage capacity detection means 96 receives the signals for each system detected by the sensor 95 and stores the cold storage capacity D _{1 to} D _n for each system.
Is converted to (S211). Next, the calculated cool storage capacity D _{1 to} D _n for each system is the cool storage capacity detection means 9 for each system.
It is temporarily stored in the storage means 6 (not shown) (S21).
2). Then, when the cool storage capacity of all the systems is converted and calculated (S213), the cool storage amount S _P of the heat storage tank 7 is detected by the sensor 47 and the cool storage amount detecting means 93 (S214), and the preset required heat storage amount S _{S is set.} The surplus cool storage amount S _{0, which} is the difference between the detected cool storage amount S _P and the stored cool storage amount S _P, is calculated by the surplus cool storage amount calculation means 94 (S215). Then, the surplus cold storage amount S ₀
The sum total of the cold storage capacities D _{1 to} D _n closest to is calculated (S
216). Then, a combination of systems corresponding to the sum of the cold storage capacities D _{1 to} D _n is determined by the cold storage operation system determination means 97, and a cold storage operation signal is output to each of the systems of the determined combination (S217). The cold storage operation control means 98 and the cold storage operation actuator 99 start the cold storage operation of the corresponding combination system (S21).
8).

As described above, when the amount of cooling is reduced, only the system required for minimum cold storage is operated, so that the efficiency of the entire system is improved.

[0075]

INDUSTRIAL APPLICABILITY The present invention cools environments to be cooled which have different cooling temperature ranges, for example. That is, the evaporator relates to a plurality of refrigerant circuits having different refrigerant evaporation temperatures, and a control device of a combined refrigerant circuit facility including a heat storage tank for storing cold heat, in a plurality of refrigerant circuit systems. When it is determined that the cold storage amount of the heat storage tank is insufficient, the cooling operation is stopped in order from the system with the lowest priority, so even if the cold storage amount is insufficient, the priority is high. It is possible to stop the cooling operation from the system, that is, it is possible to minimize the loss due to the reduction of the cooling capacity of the object to be cooled which has a great influence. Therefore, the reliability of the equipment as a whole is improved. In addition, it is not necessary to enlarge the heat storage tank in order to minimize the shortage of cold storage amount, and it is not necessary to increase the cold storage capacity to add a system for cold storage, so the manufacturing cost of the entire equipment Can be prevented from soaring.

When the amount of cold storage in the heat storage tank is detected and it is determined that the amount of cold storage is further insufficient, the system having a lower priority is switched from the cold discharge operation to the cold storage operation. Can be replenished. Therefore, the reliability of the entire equipment can be further improved.

When the operation load amount of each system is detected and the cool storage amount of the heat storage tank is detected and it is predicted that the cool storage amount is insufficient, the cooling operation is stopped from the system having the small operation load amount. Therefore, the cooling operation can be performed only in the required system. Therefore, while the cold energy stored in the cold storage can be used efficiently, the capacity of the heat storage tank can be reduced.

Then, the operation load amount of the system during the cooling operation is detected, the cool storage amount of the heat storage tank is detected, and the cooling operation is performed in the system having a large operation load, and the system having a small operation load is performed. Since it is switched to the cold storage operation, the cold storage amount is replenished even when the fluctuation of the operation load amount is large, and the adverse effect on the object to be cooled due to insufficient cooling capacity can be suppressed as much as possible.

Furthermore, since the system capable of performing the cooling operation is determined based on the stored amount of cold storage, the amount of cold storage will not be insufficient before the predetermined end time of the cooling operation and the supply stability of the cooling capacity will be improved. To do.

On the other hand, when the cold storage amount of the heat storage tank is detected and it is determined that the cold storage operation is completed before the predetermined cold storage operation end time, a system having a preset low priority for the cold storage operation (for example, Since the cold storage operation is preferentially stopped from a system in which the fluctuation of the operating load amount is small or a system in which the amount of the object to be cooled is large, the cold storage operation can be performed with a small amount of required power.

On the other hand, when the cold storage amount of the heat storage tank is detected and it is determined that the cold storage operation is completed before the predetermined cold storage operation end time, the operation is performed based on the preset priority order for the cold storage operation. Therefore, it is possible to switch from a system with a higher priority to a cooling operation. Therefore, the cold storage operation with a small required power and the cooling operation according to the importance of the object to be cooled can be compatible.

Furthermore, when the cool storage amount of the heat storage tank is detected and it is determined that the cool storage operation is completed before the predetermined cool storage operation end time, the operation load amount of each system is detected based on the actual operation state. Then, the cold storage operation is stopped with priority from the system having a low operation load amount, so that the cold storage operation can be performed using the system having the high cold storage operation efficiency. Therefore, the cold storage operation can be performed with less required power.

Then, when the cool storage amount of the heat storage tank is detected and it is determined that the cool storage operation is completed before the predetermined cool storage operation end time, the operation load amount of each system is detected based on the actual operation state. The system with a high operating load switches from cold storage operation to cold discharge operation even during cold storage operation, so it is possible to cope with sudden changes in operating load quantity and improve the reliability of the entire equipment. .

Further, the amount of cold radiation from the heat storage agent for one day is calculated, and the system having the cold storage capacity corresponding to the calculated amount of cold storage is made to perform the cold storage operation in accordance with the preset priority order. The operating time can be minimized.

Further, since the excess cold storage amount at the end time of the predetermined cold storage operation is detected and the system having the cold storage capacity commensurate with this excess cold storage amount is not allowed to perform the cold storage operation, the cold storage operation is not performed more than necessary. I'm sorry. Therefore, the cold storage operation time can be suppressed to the necessary minimum.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a composite refrigerant circuit facility and its control device according to Examples 1 to 11 of the invention.

FIG. 2 is a block configuration diagram showing a control system of a controller for a composite refrigerant circuit facility according to Embodiment 1 of the present invention.

FIG. 3 is a flow chart showing a control flow of the control device for the composite refrigerant circuit facility according to Embodiment 1 of the present invention.

FIG. 4 is a flowchart showing a priority order input processing flow of the control device for the combined refrigerant circuit facility according to Embodiment 1 of the present invention.

FIG. 5 is a block configuration diagram showing a control system of a control device for a composite refrigerant circuit facility according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to Embodiment 2 of the present invention.

FIG. 7 is a block configuration diagram showing a control system of a controller for a composite refrigerant circuit facility according to a third embodiment of the present invention.

FIG. 8 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to a third embodiment of the present invention.

FIG. 9 is a flowchart showing a load amount detection processing flow of the control device for the composite refrigerant circuit facility according to Embodiment 3 of the present invention.

FIG. 10 is a block configuration diagram showing a control system of a controller for a composite refrigerant circuit facility according to a fourth embodiment of the present invention.

FIG. 11 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to Embodiment 4 of the present invention.

FIG. 12 is a block configuration diagram showing a control system of a controller for a composite refrigerant circuit facility according to a fifth embodiment of the present invention.

FIG. 13 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to a fifth embodiment of the present invention.

FIG. 14 is a block configuration diagram showing a control system of a control device for a composite refrigerant circuit facility according to Embodiment 6 of the present invention.

FIG. 15 is a flow chart showing a processing flow of a control device for composite refrigerant circuit equipment according to embodiment 6 of the present invention.

FIG. 16 is a block configuration diagram showing a control system of a controller for a composite refrigerant circuit facility according to a seventh embodiment of the present invention.

FIG. 17 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to a seventh embodiment of the present invention.

FIG. 18 is a block configuration diagram showing a control system of a control device for composite refrigerant circuit equipment according to Embodiment 8 of the present invention.

FIG. 19 is a flowchart showing a processing flow of a control device for a composite refrigerant circuit facility according to an eighth embodiment of the present invention.

FIG. 20 is a block diagram showing a control system of a control device for a composite refrigerant circuit facility according to a ninth embodiment of the present invention.

FIG. 21 is a flow chart showing a processing flow of a control device for composite refrigerant circuit equipment according to embodiment 9 of the present invention.

FIG. 22 is a block configuration diagram showing a control system of a control device for composite refrigerant circuit equipment according to Embodiment 10 of the present invention.

FIG. 23 is a flow chart showing a processing flow of a control device for a hybrid refrigerant circuit facility according to Embodiment 10 of the present invention.

FIG. 24 is a block diagram showing a control system of a control device for a composite refrigerant circuit facility according to an eleventh embodiment of the present invention.

FIG. 25 is a flow chart showing a processing flow of a control device for a composite refrigerant circuit facility according to an eleventh embodiment of the present invention.

FIG. 26 is a diagram showing a composite refrigerant circuit facility which is the basis of the present invention.

[Explanation of symbols]

 1 Refrigerator side compressor 2 Refrigerator side condenser 3 Refrigerator side solenoid valve 4 Refrigerator side expansion valve 5 Refrigerator side evaporator 6 Refrigerant piping 7 Heat storage tank 8 Refrigerator side heat storage evaporator 9 Refrigerator side heat storage solenoid valve 10 Refrigerator side heat storage Expansion valve 11 Refrigerant pipe 21 Refrigeration side compressor 22 Refrigeration side condenser 23 Refrigeration side solenoid valve 24 Refrigeration side expansion valve 25 Refrigeration side evaporator 26 Refrigerant pipe 31 Refrigeration side supercooling heat exchanger 34 Refrigerant pipe 38 Control device 41 Cold storage Quantity detection means 42 Cold storage amount determination means 43 Priority setting means 44 Priority storage means 45 Stop system determination means 46 Cooling operation stop means 47 Sensor 48 Cooling operation stop actuator 49 Priority setting means 50 Priority storage means 51 Cold storage switching System determination means 52 Cooling cold storage operation switching means 53 Operation switching actuator 54 Sensor 55 System-specific load amount detection means 5 6 Stopping system judging means 57 Cooling operation stopping means 58 Operation starting actuator 60 System-specific load amount detecting means 61 Cooling storage switching system judging means 62 Cooling cold storage operation switching means 63 System cooling quantity setting means 64 System cooling quantity storage Means 65 Operation system determination means 66 Cooling operation control means 70 Cold storage amount calculation means 71 Cold storage completion amount determination means 72 Priority setting means 73 Priority storage means 74 Stop system determination means 75 Cold storage operation control means 76 Cold storage operation stop actuator 77 System Separate load amount detecting means 78 Stop system judging means 79 Cold storage stopping means 80 Cold storage stopping actuator 81 Cooling switching system judging means 82 Cooling switching system judging means 83 Cold storage cooling operation switching means 84 Cold storage cooling switching actuator 85 Sensor 86 Cooling amount detecting means 87 Cooling amount calculating means 88 Priority Setting Means 89 Priority Storage Means 90 Operating System Determining Means 91 Cold Storage Operation Controlling Means 92 Cold Storage Driving Actuators 93 Cooling Storage Detecting Means 94 Surplus Cooling Storage Calculating Means 95 Sensors 96 Cooling Capacity Detecting Means 97 Cold Storage Operating System Judging Means 98 cold storage operation control means 99 cold storage operation actuator

Claims (11)

[Claims] 1. A first refrigerant in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. A circuit, a heat storage refrigerant circuit in which the first expansion device is connected to the first refrigerant circuit, and a heat storage expansion device and a heat storage heat exchanger are sequentially connected in parallel with the first evaporator; The maximum refrigerating capacity of the first refrigerant circuit and the first refrigerant circuit via the heat storage heat exchanger.
Storage tank containing a heat storage agent for storing cold heat corresponding to the difference between the required refrigerating capacity of the cooled environment, the second compressor, the second condenser, the second expansion device, and the first The second refrigerant circuit of a plurality of systems in which the second evaporator for cooling the second cooled environment, which has a temperature lower than that of the second refrigerant circuit, is sequentially connected in an annular shape, and the second refrigerant circuit of the second refrigerant circuit. Second condenser and second
First refrigerating heat supply circuit having a heat exchanger for supplying cold heat to the second refrigerant circuit, the refrigerating heat supply circuit being connected to the evaporator of FIG. Cooling amount detecting means for controlling the equipment and detecting the amount of cold storage stored in the heat storage agent of the heat storage tank, and the amount of cold storage comparing the detected amount of cold storage with a preset predetermined amount of cold storage Determination means, priority setting means for setting a priority order related to the system for performing the cold heat supply of the second refrigerant circuit, and priority order for setting a priority order related to the set system of the second refrigerant circuit A stop system that determines a system for stopping the cold heat supply from the first cold heat supply circuit based on the setting means, the comparison result by the cold storage amount judging means, and the priority order stored in the priority order storing means. Judgment means and the stop system judgment Composite refrigerant circuit equipment control apparatus characterized by comprising; and a cooling operation stop means for stopping cold heat supply to determined by means lineage. 2. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit that is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit, and a second refrigerant circuit.
A first cold heat supply circuit having a cold heat supply heat exchanger connected to the second refrigerant circuit to supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit, and the first refrigerant circuit. Is connected between the first condenser and the first expansion device, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is exchanged with the heat for heat storage. And a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by bypassing the heat storage tank, the heat storage tank comprising: Cold storage amount detection means for detecting the amount of cold storage stored in the heat storage agent, cold storage amount determination means for comparing the detected cold storage amount with a preset predetermined cold storage amount, and the cold heat of the first refrigerant circuit Priority setting means for setting the priority related to the system to be supplied, Based on the priority storage means for storing the priority of the system of the first refrigerant circuit, the comparison result by the cold storage amount determination means, and the priority stored in the priority storage means. Cooling storage switching system determining means for determining a system to be switched from the cooling operation of the refrigerant circuit to the cooling storage operation, and a circuit switching device of the system determined by the cooling storage switching system determining means to switch the system to the cold storage operation. A control device for a combined refrigerant circuit facility, comprising: cold storage operation switching means. 3. A first refrigerant in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. A circuit, a heat storage refrigerant circuit in which the first expansion device is connected to the first refrigerant circuit, and a heat storage expansion device and a heat storage heat exchanger are sequentially connected in parallel with the first evaporator; The maximum refrigerating capacity of the first refrigerant circuit and the first refrigerant circuit via the heat storage heat exchanger.
Storage tank containing a heat storage agent for storing cold heat corresponding to the difference between the required refrigerating capacity of the cooled environment, the second compressor, the second condenser, the second expansion device, and the first The second refrigerant circuit of a plurality of systems in which the second evaporator for cooling the second cooled environment, which has a temperature lower than that of the second refrigerant circuit, is sequentially connected in an annular shape, and the second refrigerant circuit of the second refrigerant circuit. Second condenser and second
First refrigerating heat supply circuit having a heat exchanger for supplying cold heat to the second refrigerant circuit, the refrigerating heat supply circuit being connected to the evaporator of FIG. Cooling amount detecting means for controlling the equipment and detecting the amount of cold storage stored in the heat storage agent of the heat storage tank, and the amount of cold storage comparing the detected amount of cold storage with a preset predetermined amount of cold storage Determination means, system-specific load amount detection means for detecting the operating load amount in the second refrigerant circuit for each system, comparison results by the cool storage amount determination means, and system-specific load amount detection means for each system Stop system determining means for determining a system for stopping the cold heat supply of the second refrigerant circuit based on the operating load amount of the second refrigerant circuit, and cooling for stopping the cold heat supply to the system determined by the stop system determining means. And means for stopping the operation. Composite refrigerant circuit equipment control apparatus according to claim and. 4. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit which is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit and a second refrigerant circuit
A first cold heat supply circuit having a cold heat supply heat exchanger connected to the second refrigerant circuit to supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit, and the first refrigerant circuit. Is connected between the first condenser and the first expansion device, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is exchanged with the heat for heat storage. And a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by bypassing the heat storage tank, the heat storage tank comprising: Cool storage amount detecting means for detecting a cool storage amount stored in the heat storage agent, a cool storage amount determining means for comparing the detected cool storage amount with a preset predetermined cool storage amount, and an operation in the first refrigerant circuit. Load amount detection means for each system for detecting the load amount for each system,
Based on the comparison result by the cold storage amount determining means and the operating load amount for each system detected by the system-by-system load amount detecting means, a system to be switched from the cooling operation of the first refrigerant circuit to the cold storage operation is determined. A cold storage cold storage operation switching means for driving the circuit switchgear of the system determined by the cold storage switching system determination means to switch the system to cold storage operation. Control device for combined refrigerant circuit equipment. 5. A first refrigerant in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected in an annular shape. A circuit, a heat storage refrigerant circuit in which the first expansion device is connected to the first refrigerant circuit, and a heat storage expansion device and a heat storage heat exchanger are sequentially connected in parallel with the first evaporator; The maximum refrigerating capacity of the first refrigerant circuit and the first refrigerant circuit via the heat storage heat exchanger.
Storage tank containing a heat storage agent for storing cold heat corresponding to the difference between the required refrigerating capacity of the cooled environment, the second compressor, the second condenser, the second expansion device, and the first The second refrigerant circuit of a plurality of systems in which the second evaporator for cooling the second cooled environment, which has a temperature lower than that of the second refrigerant circuit, is sequentially connected in an annular shape, and the second refrigerant circuit of the second refrigerant circuit. Second condenser and second
And a first cold heat supply circuit having a cold heat supply heat exchanger connected to the evaporator of the heat storage tank and supplying cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit. A facility for controlling a facility, wherein a cool storage amount detecting means for detecting a cool storage amount stored in the heat storage agent of the heat storage tank, and a cool storage amount for comparing the detected cool storage amount with a preset predetermined cool storage amount. Determining means, system-specific cooling amount detecting means for detecting the cooling amount consumed in each system of the second refrigerant circuit, and system-specific cooling amount for storing the detected cooling amount of each system A system for performing the cold heat supply of the second refrigerant circuit based on the detection means, the comparison result by the cold storage amount determination means, and the cooling amount for each system stored in the system-by-system cooling amount storage means. Operating system determining means for determining, and system determined by the operating system determining means Composite refrigerant circuit equipment control apparatus characterized by comprising; and a cooling operation control means for cold supply. 6. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit that is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit, and a second refrigerant circuit.
First refrigerating heat supply circuit having a heat exchanger for supplying cold heat to the second refrigerant circuit, the refrigerating heat supply circuit being connected to the evaporator of FIG. The facility is controlled, and the cold storage amount detecting means for detecting the cold storage amount stored in the heat storage agent of the heat storage tank and the cold storage amount at a predetermined cold storage operation end time are predicted based on the detected cold storage amount. The cool storage amount calculating means, the cool storage completion amount determining means for comparing the cool storage amount at the predicted end time of the cool storage operation with the preset cool storage amount input in advance, and the system for performing the cool storage operation of the first refrigerant circuit Priority setting means for setting the priority, priority storage means for determining the priority related to the set first refrigerant circuit system, comparison result by the cool storage completion amount determination means, and the priority storage means Priority stored in And a cold storage operation control means for stopping the cold storage operation of the system determined by the stop system determination means. A control device for a composite refrigerant circuit facility, characterized in that 7. A plurality of systems including a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled, which are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit which is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit and a second refrigerant circuit
A first cold heat supply circuit having a cold heat supply heat exchanger connected to the second refrigerant circuit to supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit, and the first refrigerant circuit. Is connected between the first condenser and the first expansion device, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is exchanged with the heat for heat storage. And a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by bypassing the heat storage tank, the heat storage tank comprising: Cool storage amount detecting means for detecting the cool storage amount stored in the heat storage agent, the cool storage amount calculating means for predicting the cool storage amount at a predetermined cool storage operation end time based on the detected cool storage amount, and the predicted cool storage operation end Completing cold storage by comparing the cold storage amount at the time with the preset cold storage amount that has been input in advance An amount determination means, a priority setting means for setting a priority order related to a system in which the first refrigerant circuit is to perform a cooling operation, and a priority for storing the set priority order related to the system of the first refrigerant circuit. A system for switching from the cold storage operation to the cold discharge operation of the first refrigerant circuit is determined based on the order storage means, the comparison result by the cool storage completion amount determination means, and the priority order stored in the priority order storage means. And a cooling storage switching operation switching means for driving the circuit switchgear of the system determined by the cooling switching system determination means to switch the cooling operation to the cooling operation. A control device for a composite refrigerant circuit facility characterized by the above. 8. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit that is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit, and a second refrigerant circuit.
First refrigerating heat supply circuit having a heat exchanger for supplying cold heat to the second refrigerant circuit, the refrigerating heat supply circuit being connected to the evaporator of FIG. The facility is controlled, and the cold storage amount detecting means for detecting the cold storage amount stored in the heat storage agent of the heat storage tank and the cold storage amount at a predetermined cold storage operation end time are predicted based on the detected cold storage amount. A cool storage amount calculating means, a cool storage completion amount determining means for comparing a cool storage amount at a predicted cold storage operation end time with a preset cool storage amount input in advance, and an operating load amount in the first refrigerant circuit for each system. Cold storage operation of the first refrigerant circuit based on the system-specific load amount detection means for detection, the comparison result by the cold storage completion amount determination means, and the operation load amount for each system detected by the system-specific load amount detection means The line that should be stopped Stop system and determining means, the composite refrigerant circuit equipment control apparatus characterized by comprising; and a cold-storage operation stopping means for stopping the cold-storage operation of the determined line by the stop line determining means. 9. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and a heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger are sequentially connected to a heat storage refrigerant circuit. And a heat storage containing a heat storage agent for storing cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. A tank, a second compressor, a second condenser, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment. A second refrigerant circuit that is sequentially connected in an annular shape, a second condenser of the second refrigerant circuit, and a second refrigerant circuit.
A first cold heat supply circuit having a cold heat supply heat exchanger connected to the second refrigerant circuit to supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit, and the first refrigerant circuit. Is connected between the first condenser and the first expansion device, and has a circuit opening / closing device for opening / closing the flow path for each system, and the refrigerant from the first condenser is exchanged with the heat for heat storage. And a second cold heat supply circuit for supplying the cold heat from the heat storage agent of the heat storage tank to the first refrigerant circuit by bypassing the heat storage tank, the heat storage tank comprising: Cool storage amount detecting means for detecting the cool storage amount stored in the heat storage agent, the cool storage amount calculating means for predicting the cool storage amount at a predetermined cool storage operation end time based on the detected cool storage amount, and the predicted cool storage operation end Completing cold storage by comparing the cold storage amount at the time with the preset cold storage amount that has been input in advance The amount determination means, the system-specific load amount detection means for detecting the operating load amount in the first refrigerant circuit for each system, the comparison result by the cold storage completion amount determination means, and the system-specific load amount detection means Cooling switching system determining means for determining a system to be switched from the cold storage operation to the cooling operation of the first refrigerant circuit based on the operating load amount for each system, and the system determined by the cooling switching system determining means 2. A control device for a composite refrigerant circuit facility, comprising: a cold storage cold-cooling operation switching means for driving the circuit switchgear to switch the system to a cold-cooling operation. 10. A plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage containing a heat storage agent that stores cold heat corresponding to a difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. Tank and second
Of the compressor, the second condenser, the second expansion device, and the second evaporator for cooling the second cooled environment that is lower in temperature than the first cooled environment are sequentially connected in an annular shape. Become second
Of the refrigerant circuit and the second condenser and the second evaporator of the second refrigerant circuit, which supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit. For controlling a composite refrigerant circuit facility having a first cold heat supply circuit having a heat exchanger for use, wherein a cold radiation amount detecting means for detecting a cold radiation amount from the heat storage agent of the heat storage tank, A cooling amount calculation means for calculating the amount of cooling for one day by integrating the detected cooling amounts, and a priority setting means for setting the priority of the system in which the cold storage operation of the first refrigerant circuit is to be performed. A priority order storing means for storing the set priority order of the system of the first refrigerant circuit, a cooling amount for one day calculated by the cooling amount calculating means, and the priority storing means. A system for performing the cold storage operation of the first refrigerant circuit is determined based on the stored priority order. That the operating system and the determination means, the composite refrigerant circuit equipment control apparatus characterized by comprising; and a cold-storage operation control means for performing cool storage operation of the determined line by the operation system determination means. 11. A first system of a plurality of systems in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected in an annular shape. No. 1 refrigerant circuit, the first refrigerant circuit, the first expansion device, and the heat storage expansion device in parallel with the first evaporator, and a heat storage heat exchanger in which a heat storage heat exchanger is sequentially connected. And a heat storage agent for storing cold heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. Second heat storage tank
Of the compressor, the second condenser, the second expansion device, and the second evaporator for cooling the second cooled environment that is lower in temperature than the first cooled environment are sequentially connected in an annular shape. Become second
Of the refrigerant circuit and the second condenser and the second evaporator of the second refrigerant circuit, which supply cold heat from the heat storage agent of the heat storage tank to the second refrigerant circuit. For controlling a composite refrigerant circuit facility having a first cold heat supply circuit having a heat exchanger for use, wherein a cool storage amount detecting means for detecting a cool storage amount of the heat storage agent at a predetermined cooling operation end time And a surplus cold storage amount calculating means for calculating a surplus cool storage amount by comparing the detected cool storage amount with a preset cool storage amount that has been input in advance, and a system-specific cool storage capacity detecting means for detecting a cool storage capacity for each system, Cool storage for determining a system in which the cold storage operation of the first refrigerant circuit is to be performed based on the excess cold storage amount calculated by the excess cold storage amount calculation means and the cold storage capacity for each system detected by the system-specific cold storage capacity detection means Operating system determination means,
A cool storage operation control means for performing a cool storage operation of the system determined by the cool storage operation system determining means, the control device for a composite refrigerant circuit facility.