JP2004271166A - Refrigeration air conditioning system and its operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigeration air conditioning system requiring a small space and having simple construction permitting stable operation and reducing energy without using wasteful energy in any operating condition, and its operating method. <P>SOLUTION: The refrigeration air conditioning system comprises a first heat exchanger for heat exchange between room-temperature air and a first refrigerant, a second heat exchanger for heat exchange between low-temperature air and a second refrigerant, a third heat exchanger where refrigerants are heat exchangeable with each other passing through mutually independent flow paths, a first flow path connected to the first heat exchanger and a second flow path connected to the second heat exchanger, and a bypass flow path provided in the second flow path for bypassing the second refrigerant to the third heat exchanger. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a refrigeration / air-conditioning apparatus used for a store such as a convenience store.

  A conventional refrigeration system is connected to a showcase or a refrigerator installed in a store, and is provided completely independently of an air conditioner for performing air conditioning in the store. Patent Document 1 discloses a refrigerating air conditioner in which a plurality of compressors are provided, and air conditioning, refrigeration, and freezing are configured by one refrigeration cycle in which the same refrigerant is circulated.

  Further, the third heat exchanger has two independent flow paths each having a compressor, a condenser, and an evaporator, and the refrigerant passing through the flow paths exchanges heat with each other in the middle of the flow paths. This is shown in Patent Document 2. In addition, the patent has a structure that has two independent flow paths each equipped with a compressor and one heat exchanger, and each refrigerant exchanges heat with surrounding air while exchanging heat with a third heat exchanger. Reference 3 shows.

JP-A-2002-35767 (FIG. 1) JP-A-2003-4321 (FIG. 1) JP-A-2001-289532 (FIG. 12)

  The conventional refrigeration / air-conditioning system has a problem that air conditioning, refrigeration, and freezing are operated in completely independent refrigeration cycles, and energy is not saved by effectively utilizing heat. In addition, when equipment such as air conditioning, refrigeration, and freezing is strengthened, there is a problem in that additional independent refrigeration cycles are added, so that space is limited and costs are increased.

  Further, the conventional refrigeration and air-conditioning apparatus disclosed in Patent Literature 1 has a problem in that dangerous dispersion is not performed because air-conditioning, refrigeration, and refrigeration are constituted by one refrigeration cycle. In other words, if the compressor, expansion valve, and other components that make up the refrigeration cycle used for air conditioning are broken, even if multiple compressors are installed, the refrigeration cycle is stopped during repair. Inevitably, it will not be possible to maintain the cooling of frozen or fresh food in showcases in stores that would otherwise have no effect if the system were independent. Further, there was a problem that the equipment could not be expanded.

  In addition, since the same refrigerant is circulated to one heat exchanger on the heat source side, the effect that the efficiency is improved only at a specific time when the heating is fully operated is obtained, but in other cases, the amount of the refrigerant is small. However, when performing special operations such as defrosting, there is a problem that wasteful loss is large, and the refrigeration effect (cooling capacity) on the refrigeration side is affected by the air conditioning side. There is a problem that the effect is reduced and a sufficient cooling capacity cannot be obtained.

  In the configuration shown in Patent Literature 2, the air-conditioning-side refrigeration cycle and the refrigerator-side refrigeration cycle can be operated independently of each other, and there is no problem as in Patent Literature 1. However, there is a problem that the cost is high and an extra space is required because the heat exchanger is provided. In the configuration shown in Patent Document 3, there is no problem that the same refrigerant is used, and there is no problem that the number of heat exchangers increases, but the heat exchangers on the heat source side always exchange heat with each other. Other than that, there was a problem that the effect of the combination could not be obtained. There was also a problem that the equipment could not be easily expanded.

  An object of the present invention is to provide a refrigeration / air-conditioning apparatus that can operate stably with a simple device having a small space and reduce energy. It is another object of the present invention to provide a refrigeration / air-conditioning apparatus and a method thereof capable of operating without waste of energy in any operation state. It is another object of the present invention to provide a device that can change equipment with a simple structure at a low cost with respect to an existing machine or the like and can reduce energy when the change is made.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And, the refrigerant that passes through the independent flow paths of the first flow path connected to the first heat exchanger and the second flow path connected to the second heat exchanger can exchange heat with each other. And a second refrigerant adjustment means provided in the second flow path and capable of adjusting the amount of the second refrigerant flowing through the third heat exchanger.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And, a plurality of refrigerants that can exchange heat with each other through the independent flow paths of the first flow path connected to the first heat exchanger and the second flow path connected to the second heat exchanger. A third heat exchanger, comprising a bypass flow path connected to the first flow path or the second flow path and bypassing the refrigerant to at least one of the plurality of third heat exchangers. It is something.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And a first flow path having a first compressor connected to the first heat exchanger and a second flow path having a second compressor connected to the second heat exchanger, respectively. A third heat exchanger in which each refrigerant passing through the flow path that can exchange heat with each other, and a blower that adjusts the amount of heat exchange between the third heat exchanger and ambient air, A predetermined air-conditioning operation by driving and a predetermined refrigeration or freezing operation by driving of the second compressor are performed, and the air blowing amount of the blower is changed in a direction to reduce the input of both compressors.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And, refrigerant passing through independent flow paths of the first flow path connected to the first heat exchanger and the second flow path connected to the second heat exchanger can directly exchange heat with each other. An auxiliary having a third heat exchanger and a blower connected to at least one of the first flow path and the second flow path and provided in parallel with the third heat exchanger to adjust the amount of heat exchange with ambient air And a heat exchanger.

  The refrigeration air conditioner of the present invention has a first heat exchanger for performing room air conditioning on the load side of a plurality of first refrigeration cycles in which a refrigerant circulates, and a first heat exchanger in which a second refrigerant is circulated. A second heat exchanger that is provided in a second refrigeration cycle independent of the refrigeration cycle and performs refrigeration or freezing on the load side, and a first refrigerant that passes through at least one of the plurality of first refrigeration cycles. And a third heat exchanger that exchanges heat on the heat source side with a second refrigerant passing through the second refrigeration cycle, and a first refrigeration cycle that does not exchange heat with the third heat exchanger during cooling. The priority is given to the operation of flowing the refrigerant to the flow path of the first refrigerant, and the priority is given to the operation of flowing the refrigerant to the flow path of the first refrigeration cycle performing heat exchange with the third heat exchanger during heating. is there.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And a third heat exchanger integrally provided so that the first and second two flow paths have independent flow paths and the refrigerant passing through the respective flow paths exchange heat with each other, A first refrigeration cycle in which the first heat exchanger and the first flow path of the third heat exchanger are connected by piping, and a second refrigeration cycle of the second heat exchanger and the third heat exchanger. A second refrigeration cycle, which is connected to the flow path of the refrigeration cycle by a pipe, and a third heat exchanger that is connected to at least one of the first and second refrigeration cycles and partially or wholly flows through the refrigeration cycle. Flow path, and a refrigerant that is provided in at least one of the first and second refrigeration cycles and flows to the bypass flow path And the flow path control means for adjusting the amount, those having a.

  The operation method of the refrigeration / air-conditioning apparatus of the present invention includes a first heat exchanger provided in the first refrigeration cycle in which the refrigerant is circulated to perform room air conditioning, and a first refrigeration cycle in which the second refrigerant is circulated. And a second heat exchanger provided for independent refrigeration cycle and performing refrigeration or freezing, and heat exchange between the refrigerant passing through the first refrigeration cycle and the second refrigerant passing through the flow path of the second refrigeration cycle. Provide a third heat exchanger and a compressor in the first refrigeration cycle and the second refrigeration cycle, and turn on or off at least the compressor or adjust the rotation speed of the operation of the first and second refrigeration cycles Operating condition adjusting means for performing the air conditioning operation in the first refrigeration cycle by adjusting the operating condition adjusting means, and refrigeration or freezing operation in the second refrigeration cycle. Steps to do Adjusting the heat exchange amount of the third heat exchanger by a blower provided in the third heat exchanger, and bypassing the refrigerant to the third heat exchanger provided in the second refrigeration cycle, or Stopping the refrigerant circulating in the second refrigeration cycle for a short time to continue refrigeration or freezing.

  The operation method of the refrigeration / air-conditioning apparatus of the present invention includes a first heat exchanger provided in the first refrigeration cycle in which the first refrigerant is circulated to perform room air conditioning, and a first heat exchanger in which the second refrigerant is circulated. A second heat exchanger provided in the second refrigeration cycle independent of the refrigeration cycle and performs refrigeration or freezing, and the first refrigerant passing through the first refrigeration cycle passes through the flow path of the second refrigeration cycle. An air-cooled integrated heat exchanger that exchanges heat with the second refrigerant and adjusts the amount of heat exchange with the surrounding air by the blower, and a refrigerant-cooled integrated type that mainly performs direct heat exchange between the first refrigerant and the second refrigerant A heat exchanger and the third heat exchanger that can be connected in parallel or in series or switchable, and air conditioning operation in the first refrigeration cycle for a refrigeration air conditioner equipped with the second refrigeration cycle Performing a refrigeration or freezing operation; Performs operation mainly of air-cooled integrated heat exchanger during cooling to one refrigeration cycle, during heating is obtained and a step of driving the main refrigerant refrigerant integrated heat exchanger.

  The operation method of the refrigeration / air-conditioning apparatus of the present invention includes a first heat exchanger provided in the first refrigeration cycle in which the first refrigerant is circulated to perform room air conditioning, and a first heat exchanger in which the second refrigerant is circulated. A second heat exchanger that is provided in a second refrigeration cycle independent of the refrigeration cycle and performs refrigeration or freezing, and a first refrigerant that passes through the first refrigeration cycle passes through the flow path of the second refrigeration cycle. Direct heat exchange between the first refrigerant and the second refrigerant, and a third heat exchanger that exchanges heat with the second refrigerant, an air-cooled integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower And a third heat exchanger that can be connected in series with the refrigerant-refrigerant integrated heat exchanger, and a flow of the refrigerant-refrigerant integrated heat exchanger or the air-cooled integrated heat exchanger provided in the first refrigeration cycle. A first refrigeration cycle for a refrigeration air conditioner having Performing the air-conditioning operation and performing the refrigeration or freezing operation in the second refrigeration cycle, and opening and closing the first refrigerant by opening and closing the opening / closing means and flowing the refrigerant into the refrigerant-cooled integrated heat exchanger to the air-cooled integrated heat exchanger. Has a step of not flowing, and a step of flowing only the second refrigerant to the air-cooling integrated heat exchanger.

  ADVANTAGE OF THE INVENTION The refrigerating air-conditioner of this invention is a space-saving, simple apparatus, and the apparatus which can reduce energy is obtained. Further, according to the present invention, a refrigeration / air-conditioning apparatus and a method thereof capable of performing stable control in any operation state and operating without waste of energy are obtained. In addition, the present invention can provide an easy-to-use device such as flexible equipment change, and can perform an operation method with low energy in any situation.

Embodiment 1 FIG.
FIG. 1 is a connection diagram of air conditioning and refrigeration equipment of a store such as a convenience store, in which a plurality of air conditioning indoor units 12 and a plurality of refrigeration showcases 13 are arranged in a store 14, and the air conditioning indoor unit 12 is an air conditioning outdoor unit 10 The refrigeration showcase 13 is connected to the refrigeration / air-conditioning integrated machine 11, respectively. FIG. 1 illustrates an example in which two air conditioning indoor units 12b are connected to the air conditioning outdoor unit 10 and one air conditioning indoor unit 12a is connected to the refrigeration / air-conditioning integrated unit 11. It doesn't matter. While the refrigerated showcase 13 constantly refrigerates and freezes food and beverages, the air conditioner cools and heats the room according to the outside air temperature.

  FIG. 2 is a refrigerant circuit diagram of a refrigeration / air-conditioning integrated machine having a refrigeration cycle configuration in which an outdoor heat exchanger as a heat source connected to the refrigeration or freezing showcase of FIG. In this circuit, there are two independent refrigerant circuits, an air conditioning refrigerant circuit and a refrigeration refrigerant circuit, both of which are connected to the integrated heat exchanger 42, where both refrigerants are mixed without heat exchange. It is configured to be. Although FIG. 2 illustrates an example in which one indoor unit for air conditioning is used, it is obvious that a plurality of indoor units may be used. In the air-conditioning refrigerant circuit, high-temperature and high-pressure refrigerant discharged from the compressor 21a during heating is condensed in the indoor heat exchanger 22a and exchanges heat with indoor air to warm the room. The condensed refrigerant in the refrigerator is expanded by the expansion means 23a, exchanges heat with the outside air by the blower fan 25c in the flow path 24a of the integrated heat exchanger 42, evaporates, and is sucked into the compressor again. In the case of cooling, the four-way valve 31 is switched and the refrigerant flows in the reverse direction, and the integrated heat exchanger 42 plays the role of a condenser.

  The operation of the refrigerant circuit for air conditioning will be described. The refrigerant that has been compressed by the air conditioning compressor 21a to have a high temperature and a high pressure can be switched by the four-way valve 31 between a heating operation and a cooling operation. In the case of the heating operation, the refrigerant passes through the four-way valve 31, is sent to the air conditioning indoor heat exchanger 22a, is condensed, and expands at the air conditioning expansion valve 23a to be a low-temperature low-pressure refrigerant. At 42, the refrigerant exchanges heat with the refrigeration-side refrigerant flowing inside the refrigeration channel 24b while passing through the air conditioning channel 24a and the surrounding air via the radiating fins 41 to evaporate. Return to the compressor 21a. In the case of the cooling operation, the refrigerant passes through the four-way valve 31 and is sent to the integrated heat exchanger 42, and exchanges heat with the surrounding air through the radiation fins 41 while passing through the air conditioning flow path 24a. The refrigerant condenses and expands at the air conditioning expansion valve 23a to become a low-temperature low-pressure refrigerant, evaporates at the air conditioning indoor heat exchanger 22a, and returns to the air conditioning compressor 21a through the four-way valve 31.

  Next, the operation of the refrigeration refrigerant circuit will be described. The refrigerant compressed to a high temperature and a high pressure by the refrigeration compressor 21b is sent to the integrated heat exchanger 42 through the high-pressure maintaining means 32, and is passed through the radiating fins 41 while passing through the cooling passage 24b. It condenses by exchanging heat with air, passes through the supercooling means 33 and the liquid reservoir 26, expands at the refrigeration expansion valve 23b to become a low-temperature low-pressure refrigerant, and evaporates at the refrigeration room (showcase) heat exchanger 22b. Then, the process returns to the refrigerator compressor 21b. When the air-conditioning-side refrigerant circuit is performing the cooling operation, that is, when the air-conditioning-side refrigerant circuit is configured such that the low-temperature and low-pressure refrigerant flows through the air-conditioning refrigerant flow path 24a in the integrated heat exchanger 42. The refrigeration side refrigerant exchanges heat with the air conditioning side refrigerant flowing through the air conditioning flow path 24a in addition to the heat exchange with the ambient air in the integrated heat exchanger 42.

  The air-conditioning indoor heat exchanger 22a is provided with an air-conditioning indoor heat exchanger fan 25a and plays a role of mainly blowing out heating air to the room 14. The indoor heat exchanger or the like may be embedded in the ceiling as shown in FIG. 1, or may be a wall-mounted or floor-mounted type. Although the air-conditioning expansion means 23a is provided on the indoor side, that is, on the ceiling, it may be provided on the heat source side in some cases. The indoor heat exchanger 22b for refrigeration or freezing, which is lower in temperature than air conditioning, is housed together with the expansion means 23b in a showcase or a refrigeration apparatus arranged indoors. In the refrigeration / air-conditioning integrated machine 11 installed outdoors, the air-conditioning flow path 24a and the refrigeration or freezing flow path 24b are thermally integrally connected by radiation fins for an integrated heat exchanger to form independent flow paths. It is an integrated heat exchanger. As a result, although the refrigerant flowing through each flow path is separate, heat exchange between the fins is enabled by mutual heat exchange. Furthermore, the blower fan 25c rotates between the fins 41 of the integrated heat exchanger 42 to blow outside air, thereby enabling heat exchange between the outside air and the refrigerant flowing in each flow path.

  The refrigeration / air-conditioning integrated machine 11, which is a heat source device of the air conditioner and the refrigerator, includes a compressor 21a for air conditioning, a compressor 21b for refrigeration or freezing, a four-way valve 31 for switching the air conditioner to a cooling and heating flow path, Alternatively, the heat source side heat exchanger 42 of the refrigerating side refrigeration cycle bypasses the flow path 24b and passes or does not flow the refrigerant to the flow path 24b. The compressor 21b controls the flow to the bypass flow path 24c. High pressure maintaining means or flow path control means 32 for adjusting the pressure value of the refrigerant to be discharged, a supercooled refrigerant flow path 24d provided for performing supercooling control of the refrigeration or freezing side refrigeration cycle, a supercooling heat exchanger 22c The supercooling expansion means 23c for adjusting the amount of refrigerant in the supercooled refrigerant flow path 24d, the liquid reservoir 26 for storing excess refrigerant, and the like are separately stored in one box for air conditioning and refrigeration or freezing. IsAlternatively, the box for air conditioning and the box for refrigeration or freezing are separated, or the box including the components of the integrated heat exchanger 42 as the third heat exchanger is made independent, and the three boxes are integrated later. They may be combined. In such a case, by adopting a configuration in which piping and wiring between the boxes are connected outside each box, not only the assembling and maintenance are simplified, but also the expansion or change of the equipment can be easily dealt with.

  Although FIGS. 1 and 2 show an example of two showcases, a refrigeration unit which is a showcase and a refrigerating device requiring a lower temperature evaporator may be used, or one or three or more showcases may be used. Absent. The bypass flow path 24c that bypasses the heat source side heat exchanger of the refrigeration or refrigeration apparatus controls the operation of the refrigeration cycle, that is, regulates the temperature of the refrigeration or freezing indoor heat exchanger 22b to regulate the refrigerant flowing through the flow path. The operation of the expansion means 23b is performed normally, and the operation of the refrigeration cycle is performed smoothly. The expansion means 23b does not operate unless there is an appropriate differential pressure, and the refrigeration or freezing device does not operate. If the outside air temperature becomes low when the air conditioner is heated in the middle of winter, the discharge pressure of the compressor of the refrigerating refrigerator becomes low, and the differential pressure of the expansion means 23b cannot be secured. The amount of the refrigerant to the flow path 24b of the condenser 42 is bypassed and reduced so as to obtain the minimum pressure at which the differential pressure can be secured. Therefore, by controlling the opening degree of the high-pressure maintaining means 32 that maintains the minimum pressure, which is the flow path control means, accurate temperature control by the expansion means 23b can be maintained, so that the air conditioner and the refrigeration or A practical and effective device capable of adjusting the temperature of the device while maintaining high efficiency of the refrigeration device is obtained. For example, when the air-conditioning side refrigeration cycle is performing a heating operation in winter, energy consumption can be reduced by heat recovery. Further, when the air conditioning refrigeration cycle in the intermediate period is stopped or is performing a weak operation, the radiating fins 41 of the integrated heat exchanger 42 can be used for radiating the refrigerant in the refrigeration side channel 24b, so that the heat transfer of the refrigeration side refrigeration cycle is performed. The area increases and energy is saved. Further, since optimization can be performed in accordance with the operation state by the blower 25c, there is no waste of energy. Further, since the supercooling circuit is provided in the refrigeration side refrigeration cycle, the refrigerant flowing into the liquid reservoir 26 can be liquefied, and the operation can be prevented from becoming unstable.

  The difference between the operation of the air conditioner and the refrigerator alone and the operation of the integrated device will be described with reference to the Mollier diagram shown in FIG. 3 in the case where the air conditioner performs the heating operation. In the following description, it is assumed that the temperature of the air in the store is about 20 ° C., the temperature of the outside air is about 10 ° C., and the temperature of the air in the showcase is about 5 ° C. The refrigerant flowing in the piping of the air conditioner and the refrigerator was R410A, and the saturation pressure of the refrigerant was issued by the Japan Refrigeration and Air Conditioning Society on May 26, 1998. Calculated based on Thermodynamic Properties of Pure and Blended Hydrofluorocarbon (HFC) Refrigerants.

  In the air conditioner, the condensing temperature (CT) of the refrigerant flowing in the indoor heat exchanger 22a during the heating operation is about 50 ° C. in order to secure a sufficient temperature difference with the in-store air temperature, and the refrigerant flowing in the outdoor heat exchanger 24a is evaporated. The temperature (ET) is about −6 ° C. to secure a sufficient temperature difference from the outside air temperature. At this time, the high pressure and the low pressure of the air conditioning compressor 21a are obtained as the saturation pressures of the condensing temperature and the evaporating temperature, respectively, and become a high pressure of 3.0535 MPa and a low pressure of 0.65558 MPa. Therefore, the compression ratio, which is the ratio between the high pressure and the low pressure of the compressor, is obtained from the ratio of 3.0535 MPa to the low pressure 0.65558 MPa, and is 4.66.

  In the refrigerating refrigerator, the condensing temperature (CT) of the refrigerant flowing in the outdoor heat exchanger 24b is about 30 ° C. in order to secure a sufficient temperature difference from the outside air temperature, and the refrigerant flowing in the showcase heat exchanger 22b. Is about −10 ° C. in order to secure a sufficient temperature difference from the air temperature in the showcase. At this time, the high pressure and the low pressure of the refrigeration compressor 21b are obtained as the saturation pressures of the condensing temperature and the evaporating temperature, respectively, and become a high pressure of 1.8797 MPa and a low pressure of 0.57228 MPa. The compression ratio is determined by the ratio of 1.8797 MPa to 0.57228 MPa, and is 3.28.

  On the other hand, in the refrigeration / air-conditioning integrated machine, when the air-conditioning side circuit performs the heating operation, the condensing temperature (CT) of the refrigerant flowing in the indoor heat exchanger 22a is 50 ° C. in order to secure a sufficient temperature difference from the in-store air temperature. About. In the refrigeration refrigerator, the evaporation temperature (ET) of the refrigerant flowing through the heat exchanger 22b in the showcase is about -10 ° C in order to secure a sufficient temperature difference from the air temperature in the showcase.

  In addition, since the air-conditioning-side refrigerant flowing in the air-conditioning flow path 24a of the integrated outdoor heat exchanger 42 and the refrigeration-side refrigerant flowing in the refrigeration-side circuit 24b perform heat exchange, the evaporation temperature (ET1) of the refrigerant flowing in the 24a. ) Is determined by the condensation temperature (CT2) of the refrigeration-side refrigerant flowing inside 24b and the heat exchange performance between 24a and 24b. Now, assuming that the heat exchange performance between 24a and 24b is larger than that of the air-cooled heat exchanger in the case of a single unit, the temperature difference between ET1 and CT2 becomes closer than in the case of the single unit. Assume that CT2 becomes 26 ° C. Then, the high pressure and the low pressure of the air-conditioning-side compressor 21b are obtained as the saturation pressure of the condensation temperature CT1 and the evaporation temperature ET1, respectively. Become. The high pressure and low pressure of the refrigeration compressor 21b are obtained as the saturation pressure of the condensation temperature CT2 and the evaporation temperature ET2, respectively. Become.

  At this time, the compression ratio 3.38 of the air-conditioning side compressor is 27% as compared with the compression ratio 4.66 of the single unit, and the compression ratio 2.96 of the refrigerator side compressor is compared with the compression ratio 3.28 of the single unit. The value is 10% smaller. The input of the compressor depends on the compression ratio and the refrigerant flow rate. If the refrigerant flow rate is the same, the smaller the compression ratio, the smaller the input. Therefore, if the integrated heat exchanger 42 is designed so as to realize the pressure relationship shown here, energy saving of 27% on the air conditioning side and 10% on the refrigeration side can be achieved for the refrigeration / air-conditioning integrated machine alone. If the compression ratio, that is, the enthalpy difference between the refrigerants before and after the compressor is reduced, the work of the compressor is the enthalpy difference × the flow rate of the refrigerant, and the input becomes small and the energy can be reduced.

  As described above, when the heat exchange amount between the air conditioning side and the refrigeration side is large, the low pressure on the air conditioning side increases and the high pressure on the refrigeration side decreases. However, when the high pressure on the refrigeration side drops too much, a pressure difference between before and after the expansion means 23b cannot be secured, and the expansion means 23b does not operate normally. Therefore, when the high pressure on the refrigeration side becomes lower than the preset lower limit, a part of the refrigerant bypasses the liquid reservoir 26 without passing through the heat exchanger 42 by the action of the high pressure maintaining means 32, and the high pressure is reduced. This prevents the temperature control of the device from being heard below the lower limit.

  Next, the operation state of the refrigeration / air-conditioning integrated unit 11 and the energy saving measures when the operation of the air conditioner differs depending on the season will be described. In summer, since the air conditioner performs cooling operation, there is no heat exchange between the refrigerants in the integrated heat exchanger 42, and both the air conditioner and the refrigerator perform the maximum heat exchange with air. Blower fan 25c is operated at full capacity. Even when the air conditioner is stopped in spring or autumn, the blower fan 25c of the integrated heat exchanger is operated at full speed so that the refrigerator exchanges heat with air to the maximum. At this time, the large size of the radiating fins 41 of the integrated heat exchanger, that is, the presence of the two flow passages effectively acts on the operation of the refrigerator for heat radiation. When the air conditioner is performing a heating operation and the air conditioning load is small as in early spring or late autumn, heat exchange between the air conditioning side and the refrigeration side refrigerant is performed in the integrated heat exchanger 42, but the heat exchange amount is Since it is not so large, both the air conditioner and the refrigerator need to sufficiently exchange heat with air, and the blower fan 25c of the integrated heat exchanger is operated at full capacity. In winter, when the heating load increases and the high pressure on the refrigeration side approaches the lower limit, it is necessary to reduce the amount of heat condensed on the refrigeration side. Therefore, the rotation speed of the blower fan 25c of the integrated heat exchanger is reduced, and The amount of heat exchange between the refrigerant and the air is reduced while the maximum amount of heat exchange between the refrigerant and the refrigeration side refrigerant is ensured so that the high pressure on the refrigeration side does not drop too much. Then, when the heating load of the air conditioner further increases, the blower fan 25c of the integrated heat exchanger is finally stopped. At this time, the amount of heat of evaporation of the air-conditioning-side refrigerant and the amount of heat of condensation of the refrigeration-side refrigerant are provided only by heat exchange between the air-conditioning-side and refrigeration-side refrigerants, which is effective for energy saving. When the heating load of the air conditioner in winter becomes excessive and the discharge pressure of the refrigerator reaches a minimum pressure at which the differential pressure of the expansion means 23b can be maintained, the operation of the high-pressure maintenance means 32 for maintaining the high pressure of the refrigerator. By this, the refrigerant is bypassed through the bypass flow path 24c, the amount of the refrigerant flowing to the cooling flow path 24b of the integrated heat exchanger is reduced, and the operation is performed while maintaining the high pressure on the refrigeration side while recovering the exhaust heat of the air conditioner. As described above, in a refrigeration air conditioner that performs heat exchange between independent flow paths having an integrated heat exchanger and saves energy, there is a case where the operation of each single refrigeration cycle is performed more fully than a heat exchange such as during cooling. In order to effectively perform heat exchange in the integrated heat exchanger, the air temperature on the air conditioning side and the condensation temperature on the refrigeration or freezing side are brought as close as possible to at least one side, and preferably a blower 25c in a direction to reduce the compression ratio on both sides. Adjust it.

  Normally, the air-conditioning-side compressor 21a controls the frequency based on the temperature difference between the set temperature in the store and the indoor suction temperature. However, a compressor using a motor such as a constant speed induction motor without this control is used. You may. Even if there is no control of the compressor, the operation according to the air conditioning load in the store is performed by turning on / off the fan 25a for the indoor heat exchanger, the expansion valve 23a, and the compressor 21a. The refrigerating-side compressor 21b performs frequency control so as to maintain the refrigerating-side low pressure, but the temperature adjustment in the showcase or the like may be performed by the refrigerating or freezing fan 25b or the expansion valve 23b. Therefore, as in the case of the air conditioning, the refrigeration-side compressor 21b may use a constant-speed compressor without frequency control. When the air-conditioning power is smaller than the refrigeration power, the fan speed of the blower fan 25c of the integrated heat exchanger is operated at the maximum rotation speed when the air-conditioning power is smaller than the refrigeration power. If the air-conditioning power becomes larger than the stage where heat or the like recovers the exhaust heat of the air conditioning, the blower is stopped. In addition, the amount of bypass refrigerant in the bypass passage 24c of the refrigeration or freezing side refrigeration cycle is not bypassed to the minimum set amount of the refrigeration side high pressure, and the air conditioning power is further increased so that the refrigeration side high pressure becomes equal to or less than the set value. In this case, the bypass amount is gradually increased to the maximum bypass amount determined by the circuit of the refrigeration cycle.

  Next, a heat exchange unit structure, which is a detailed structure of the integrated heat exchanger, will be described with reference to FIGS. FIG. 4 shows that the air-conditioning flow path 24a and the refrigeration or freezing flow path 24b are separated and inserted into the same radiating fin 41 and integrated with the fin to transfer heat between the refrigerant flowing through each flow path by heat transfer. As shown in the figure, one inlet is set to the other outlet as shown in the figure, so that both condensed heat is not partially concentrated at the time of air conditioning and cooling. The heat exchange performance is improved by obtaining a temperature difference of the heat of condensation. Further, since the tubes of the heat exchanger are not crossed, the production is simplified. FIG. 5 shows a structure in which the air conditioning flow path 24a and the refrigeration or freezing flow path 24b are crossed to further improve the heat transfer between the two via the fins 41. In FIG. 4, the blower fan 42 blows air from the refrigeration or freezing passage 24b side. This is because the refrigeration-side refrigerant having a high temperature and a high pressure dissipates heat in the passage 24b and exchanges heat with low-temperature air. Has a large amount of heat exchange, and the low-temperature and low-pressure air-conditioning-side refrigerant absorbs heat in the flow path 24a, so that heat exchange with the high-temperature air increases the amount of heat exchange. Heat exchange with the refrigeration side refrigerant passing through the flow path 24b and heat exchange of the slightly heated outside air with the air conditioning side refrigerant passing through the air conditioning flow path 24a increase the amount of heat exchange and improve efficiency. is there. However, it goes without saying that air may be sent from either side in the structure shown in FIG. FIG. 6 shows an example of a structure using a heat exchanger having a double pipe structure, in which the outside of the double pipe is used as a cooling or freezing flow path 24b, and the inside thereof is used as an air conditioning-side flow path 24a. The air-conditioning refrigerant exchanges heat only with the refrigeration refrigerant, and the refrigeration refrigerant sends heat from the outside of the integrated heat exchanger with the fan 25c and exchanges heat with the ambient air in addition to heat exchange with the air-conditioning refrigerant. It is effective at the time of heating. If the directions of flowing the refrigerant in the inner and outer flow paths 24a and 24b are reversed as shown in the figure, the performance is improved as described above. The heat transfer between the two flow paths is further improved by the double-tube heat exchanger. It is to be noted that the refrigeration or freezing flow path 24b is formed as a box without using a double pipe for heat exchange between the air conditioning side flow path 24a and the refrigeration or freezing flow path 24b. By storing the pipe 24a inside and cooling it by further arranging a separate water pipe inside, an efficient refrigeration and air-conditioning system can be obtained even for large-scale equipment.

  FIG. 7 is a diagram showing a configuration that is effective not only for energy saving during heating but also for cooling. A refrigeration or freezing sub-heat exchanger 22d is provided in the bypass passage 24c of the configuration in FIG. In FIG. 7, as described above, the amount of refrigerant flowing to the bypass flow passage 24c by the operation of the flow passage control means 32 is controlled so that the high pressure on the refrigeration side does not drop too much when the outside air temperature in winter is low and the heating load is too large. adjust. At this time, the high-temperature and high-pressure gas refrigerant that has flowed into the bypass passage 24c is bypassed to the outlet side of the integrated heat exchanger 42 without exchanging heat, and merges with the liquid refrigerant condensed in the integrated heat exchanger 42. I do. At this time, if the condensed liquid refrigerant is more than the bypassed gas refrigerant, the refrigerant can be completely liquid before reaching the liquid reservoir 26 by the operation of the supercooling means 33. However, when the outside air temperature is particularly low or when the heating load is particularly large, almost the entire amount of the refrigerant passes through the bypass passage 24c, and the ratio of the refrigerant gas reaching the supercooling means 33 is large. However, the liquid cannot be sufficiently liquefied by the supercooling means 33, and the refrigerant containing gas is supplied to the liquid reservoir, and the refrigeration cycle becomes unstable. Therefore, the refrigerant passing through the bypass passage 24c is heat-exchanged with the surrounding air by the operation of the sub-heat exchanger 22d for refrigeration or freezing and the blower fan 25d, and is a gas-liquid two-phase enough to be liquefied by the liquid refrigerant or the supercooling means 33. Use refrigerant to prevent the refrigeration cycle from becoming unstable. The fan 25d for the sub-heat exchanger 22d for refrigeration or freezing uses the blower fan 25c for the integrated heat exchanger 42, and need not be provided with a special fan.

  FIG. 8 is a configuration diagram of not only energy saving measures at the time of heating as shown in FIG. 7 but also increasing the amount of heat exchange at the time of cooling to improve the heat exchange performance throughout the year. Alternatively, not only is the refrigeration sub-heat exchanger 22d provided, but also the air-conditioning refrigeration cycle is provided with the air-conditioning sub-heat exchanger 22e in parallel with the integral heat exchanger 42 together with expansion means in series. In this case, the integrated heat exchanger 42 does not perform ventilation as in the plate heat exchanger or the double tube heat exchanger, but only needs to exchange heat between the air-conditioning flow passage 24a and the refrigeration or freezing flow passage 24b. It can be something. When heat exchange is effective, such as when the air-conditioning side is heating, the refrigerant flows into the integrated heat exchanger 42 by the flow path control means 32, that is, heat transfer with the refrigerant having a different temperature flowing through the refrigeration or freezing flow path is performed by the apparatus. When the air conditioner is effective for energy saving, the refrigerant flows through the integrated heat exchanger 42, and when the air conditioner wants to perform a single operation as in the case of cooling, the refrigeration or refrigeration provided in the bypass flow path by the flow path control means 32. The air conditioning sub heat exchanger 22e may be fully utilized together with the serial expansion means by utilizing the air conditioning sub heat exchanger 22d or expanding means provided in the air conditioning flow path 24a. At this time, on the air-conditioning side, the air-conditioning sub-heat exchanger 22e is fully used, so that the air-conditioning expansion means 23a may be closed so that the refrigerant does not flow through the flow path 24a. The reduction of the compression ratio can be adjusted by the blowing fans 25d and 25e provided in the respective sub heat exchangers. Of course, the effect of saving space is lost, but the effect of reducing the compression ratio and the like is the same even when the integrated heat exchanger 42 is a heat exchanger with a blower. It is clear from the above description that a configuration excluding the refrigeration sub heat exchanger 22d from the configuration in FIG. 8 may be employed. It is also possible to utilize the integrated heat exchanger 42 for air conditioning without exchanging heat with the freezing side. That is, by operating the flow path control means 32 and controlling the air-conditioning expansion means 23a without flowing the refrigerant into the refrigeration side flow path 24b, the refrigerant is caused to flow to the integrated heat exchanger 42. At this time, the integrated heat exchanger 42 If a fan for a heat exchanger is provided in the air conditioner, it is possible to cope with a large cooling load together with the sub heat exchanger 22e for air conditioning.

  FIG. 9 is a configuration diagram that increases the amount of heat exchange and improves the heat exchange performance throughout the year as compared with the configuration that is effective not only during energy saving during heating but also during cooling in FIG. 2. The integrated heat exchanger having the configuration in FIG. In addition to providing the air conditioning-side refrigeration cycle, the air conditioning side refrigeration cycle has the same configuration as the integrated heat exchanger 42 in parallel with the integrated heat exchanger 42, that is, the second air conditioning channel 24a (2) and the second refrigeration or freezing. In this configuration, a sub-integrated heat exchanger 42 (2) capable of mutually exchanging heat is provided in the use channel 24b (2). The integral heat exchanger 42 and the sub-integrated heat exchanger 42 (2) can increase the amount of heat exchange in both flow paths, and the expansion means provided in series with the sub-integrated heat exchanger 42 (2) Adjustment of the refrigerant pressure and the refrigerant amount by the expansion means 23a of the air conditioning side refrigeration cycle and the air conditioning side refrigeration cycle enables the air conditioning to perform its cooling operation fully. In this case, the sub-integrated heat exchanger 42 (2) does not perform ventilation as in the plate heat exchanger and the double tube heat exchanger, and the air conditioning flow path 24a (2) and the refrigeration or freezing flow path 24b (2). If only the heat exchange is performed, the size can be reduced. 7 and 8 show the auxiliary heat exchanger provided in parallel with the integrated heat exchanger 42 in FIG. 2, and FIG. 9 shows the integrated heat exchanger 42 in FIG. Of the plurality of heat exchangers provided as outdoor units, while flowing refrigerant to a plurality of integrated heat exchangers, flowing refrigerant only to one integrated heat exchanger, or flowing only to the auxiliary heat exchanger while saving energy As described above, it is possible to operate the refrigerating and refrigerating apparatus at all times and to comfortably perform the air conditioning. In other words, during heating, energy can be saved in the direction of full flow to both sides, and during cooling, each refrigeration cycle can be operated independently utilizing the heat radiation area of the integrated heat exchanger.

  The integrated heat exchanger 42 and the sub-integrated heat exchanger 42 (2) described above with reference to FIGS. 1 to 9 or other sub heat exchangers are plate-fin type heat exchangers, and the fan between the fins is a fan. It may be of a type that ventilates at and actively exchanges heat between the fins and the air, or a plate type, that is, a different flow flows on both sides of the plate to mainly perform heat exchange between the two flow paths. It may be of various types, such as a type provided, a double pipe, or one channel containing the other channel. In this case, the blowing by the blower is limited to the blowing to one flow path, or the blower is not provided. Alternatively, it can be arranged so that air is simultaneously sent to a double-tube heat exchanger or a plate heat exchanger at the same time as air is sent to a plate fin type heat exchanger such as an air-cooling integrated type. In this case, the latter is placed on the leeward side The air flow to the air-cooled heat exchanger does not need to be disturbed, and the heat exchange performance can be improved with energy saving. Further, a refrigerant-refrigerant heat exchanger such as a double pipe may be insulated from the air-cooled heat exchanger and cut off from the flow of air. However, the refrigeration-side refrigerant is only slightly condensed by air without heat insulation.

  FIG. 10 is a configuration diagram of the refrigeration / air-conditioning apparatus, in which the detection means necessary for adjusting the heat exchange amount of the integrated heat exchanger 42 in the refrigeration / air-conditioning apparatus of FIG. 2 is described. As the detection means, an indoor air temperature detection means 51 and an air conditioning-side heat exchanger temperature detection means 52 for measuring the tube temperature of the air conditioning indoor heat exchanger 22a are provided in the air conditioning indoor heat exchanger 22a. The air conditioner-side heat exchanger temperature detecting means 52 may be a pressure detecting means provided on the discharge side or the suction side of the air conditioning compressor 21a. The integrated heat exchanger 42 is provided with a refrigeration-side or freezing-side condensation temperature detecting means 62. The condensing temperature detecting means 62 may be a high pressure detecting means provided on the discharge side of the refrigerating or freezing compressor 21b. Detecting the discharge pressure of the compressor 21b, which is already the high pressure of the refrigeration side or freezing side refrigeration cycle, adjusts the flow path control means 32, and when the pressure becomes equal to or less than the preset minimum pressure, the refrigerant is supplied to the bypass 24c. Although the flow is described, this operation is performed based on the condensation temperature or the detection value of the high-pressure detection unit 62. The high pressure maintaining means 32 may be configured to mechanically maintain the pressure on the side of the integrated heat exchanger 42 at a predetermined value or more. Further, a refrigeration refrigerant low pressure detecting means 61 is also provided. However, the evaporating temperature of this circuit having the same meaning as the detecting means may be detected, or the ambient air temperature of the load side heat exchanger 22b may be detected and replaced. Next, a configuration capable of increasing the heat exchange amount of the integrated heat exchanger and performing an effective energy-saving operation under each operation condition will be described with reference to FIG.

  FIG. 11 shows a case where the integrated heat exchanger 42 is divided into a plurality of units and connected in series, and housed in the box of the outdoor heat exchanger together with the compressors 21a and 21b and the respective valves as a heat source unit. Instead of separating the integrated heat exchanger 42 as shown in FIG. 9 and installing it so as to transfer heat in parallel to the refrigerant flows of the air conditioning refrigerant cycle and the refrigeration refrigeration refrigerant cycle, the refrigerant flow of both refrigerant cycles Two of the integrated heat exchangers perform mutual heat exchange between the air-conditioning flow path 24a and the refrigeration or freezing flow path 24b, and one of the plate-type heat exchangers It is an integrated heat exchanger 42 (1) that does not actively exchange heat with the surrounding air by a blower fan or the like like a double-tube heat exchanger, that is, a refrigerant-coolant integrated heat exchanger. The integrated heat exchanger 42 (2) connected in series with this also exchanges heat with the surrounding air by the blower 25c, and can also adjust the amount of heat exchange by changing the rotation speed of the blower 25c. It is an air-cooled integrated heat exchanger. The other configuration is the same as the configuration in FIG. 2 and the like, whereby the amount of heat exchange between both flow paths can be increased. In addition, the heat source unit of the refrigeration and air conditioning system, which is an outdoor unit that has increased the amount of heat exchange and made energy saving measures more effective, is an integrated heat exchanger in which the air conditioning and refrigeration or refrigeration refrigeration cycles are separated independently from each other. Since 42 (1) and 42 (2) are connected in series with pipes, an integrated heat exchanger is arranged in the center of one box, and an air conditioning side refrigeration cycle and a refrigeration cycle for refrigeration etc. are arranged in order on both sides in order. It can be arranged, and the pipe connection part with the outside is put together at a position where it is easy to connect near both sides and near the upper or lower center. When the outdoor heat exchanger is configured as a heat source unit by dividing the integrated heat exchanger 42 into a plurality of units and connecting them in parallel or in series, as described above, only two main and auxiliary heat exchangers are used. It is natural that more heat exchangers may be used, and not only the main and auxiliary, or with or without control of the amount of heat transfer to the outside air by the blower fan, but also both It is natural that a blower fan may be provided in the integrated heat exchanger.

  FIGS. 12 and 13 show an integrated heat exchanger 42 as shown in FIG. 11 in which the amount of heat exchange is increased and two parts which are separated so as to efficiently cope with each operation state are provided with an air-conditioning passage 24a and a refrigeration or freezing passage. While performing mutual heat exchange with the flow path 24b, one is a refrigerant-refrigerant integrated heat that does not actively exchange heat with the surrounding air by a blower fan or the like like a plate heat exchanger or a double tube heat exchanger. The exchanger 42 (1). The air-cooling integrated heat exchanger 42 (2) connected in series with this also exchanges heat with the surrounding air by the blower 25c, and can adjust the amount of heat exchange by changing the rotation speed of the blower 25c. . In this regard, the control operation will be described. In the figure, 34 is an integrated thermal AC path switching means, A and B are symbols representing flow paths, 35 (1) and 35 (2) shown in FIG. 13 are check valves, and 42 (1) is an integrated heat exchanger. Since only heat exchange between the air-conditioning-side refrigerant and the refrigeration-side refrigerant is performed, no blower is attached. Reference numeral 42 (2) is an integrated heat exchanger that exchanges heat between the air-conditioning-side refrigerant and the refrigeration-side refrigerant and also communicates with ambient air. A blower is attached to also perform heat exchange. The other configuration is the same as the configuration of FIGS. 2 to 11 described above, and the operation is the same.

  First, a description will be given of a case where the air-conditioning side in the intermediate period and the winter period is stopped or performs the heating operation in the configuration of FIG. When there is no air conditioning load and the refrigerant circulation on the air conditioning side is stopped, the integrated heat AC path switching means 34 is set to the position B in order to prevent the refrigerant from condensing into the integrated heat exchanger 42 (2). The refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, and passes through the refrigeration flow path 24b (1) of the integrated heat exchanger 42 (1). The flow reaches the refrigerating channel 24b (2). At this time, since the circulation of the refrigerant on the air conditioning side is stopped, heat is not exchanged in the integrated heat exchanger 42 (1). In the integrated heat exchanger 42 (2), the heat is exchanged with the surrounding air by the action of the blower fan 25c to condense. And evaporates in the refrigeration heat exchanger 22b that generates cold air for cooling the load, such as food, at a predetermined low temperature, and returns to the compressor 21b. If the outside air temperature is too low and the high pressure in the refrigeration side refrigeration cycle is too low, a part of the refrigerant is bypassed by the high pressure maintaining means 32 in order to maintain the differential pressure of the expansion means 23b and ensure normal operation. By flowing to the path 24c, the high pressure is prevented from lowering. If the high pressure is still too low, the rotation speed of the blower 25c is reduced.

  Next, the case where the air conditioning load is small will be described. When there is a not so large air conditioning load, that is, when the air-conditioning-side refrigerant evaporation heat amount <the refrigeration-side refrigerant condensation heat amount is satisfied, the integrated heat AC path switching unit 34 is set to the position B. The operation in this state is called mode B. The air-conditioning-side refrigerant is compressed by the air-conditioning compressor 21a to become a high-temperature and high-pressure refrigerant, and is sent to the air-conditioning-side indoor heat exchanger 22a, which is a load, to heat the room. Then, by the action of the blower fan 25a, heat is exchanged with the indoor air to condense, expand by the expansion means 23a to become a low-temperature and low-pressure refrigerant, pass through the integrated heat AC path switching means 34, and then pass through the integrated heat exchanger 42 ( It is sent to the air conditioning flow path 24a (1) of 1), where it is evaporated by performing heat exchange with the high-temperature and high-pressure refrigerant on the refrigeration side, and returns to the air conditioning compressor 21a. Since the refrigerant circulating in the refrigeration cycle evaporates and gasifies by absorbing heat from the surrounding medium in the evaporator, the temperature of the refrigerant in the evaporator cannot be higher than the temperature of the surrounding medium. In the mode B, the air-conditioning-side refrigerant absorbs heat from the high-temperature refrigeration-side refrigerant and evaporates in the integrated heat exchanger 42 (1), and its evaporation temperature is high-temperature and high-pressure refrigeration regardless of low-temperature outside air. It is determined by the temperature of the side refrigerant and the amount of heat exchange in the integrated heat exchanger 42 (1) and can be kept at a high value, so that a very efficient operation becomes possible. Therefore, it is necessary to prevent external air such as ventilation from being applied to the air-conditioning-side refrigerant in the integrated heat exchanger 42 (1). On the other hand, the refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, and passes through the refrigeration flow path 24b (1) of the integrated heat exchanger 42 (1) to form the integrated heat exchanger 42 (2). ) To the refrigerating channel 24b (2). At this time, since the low-temperature and low-pressure refrigerant on the air-conditioning side passes only through the integrated heat exchanger 42 (1), the refrigerant on the refrigeration side in the refrigerant-refrigerant integrated heat exchanger 42 (1) is It exchanges heat with the refrigerant and condenses. However, since the heat of evaporation on the air conditioning side is not so large, the refrigerant on the refrigeration side does not completely condense and reaches the air-cooling integrated heat exchanger 42 (2). In the air-cooling integrated heat exchanger 42 (2), heat is exchanged with the surrounding air by the action of the blower fan 25c, condensed, passed through the supercooling means 33 and the liquid reservoir 26, expanded in the expansion means 23b, and reduced in temperature and pressure. It becomes a refrigerant, evaporates in the refrigeration heat exchanger 22b, and returns to the compressor 21b. The operation when the outside air temperature is too low is the same as the above.

  Next, the case where the air conditioning and heating load is large will be described. When the air conditioning load is large, the integrated thermal AC path switching means 34 is set to the position A. The operation in this state is referred to as mode A. The air-conditioning-side refrigerant is compressed by the air-conditioning compressor 21a to become a high-temperature and high-pressure refrigerant, sent to the air-conditioning-side indoor heat exchanger 22a, exchanges heat with the surrounding air by the action of the blower fan 25a, condenses, and expands. The refrigerant expands at 23a to become a low-temperature low-pressure refrigerant, passes through the integrated heat exchange path switching means 34, passes through the air conditioning flow path 24a (2) of the integrated heat exchanger 42 (2), and then passes through the integrated heat exchanger 42 (1). ) Is sent to the air conditioning channel 24a (1). In the integrated heat exchanger 42 (2), heat exchange with the high-temperature and high-pressure refrigerant on the refrigeration side and heat exchange with the surrounding air by the action of the blower 25c are performed. The heat exchange with the high-temperature and high-pressure refrigerant on the side is performed again, and the evaporated refrigerant returns to the air conditioning compressor 21a. On the other hand, the refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, and passes through the refrigeration flow path 24b (1) of the integrated heat exchanger 42 (1) to form the integrated heat exchanger 42 (2). ) To the refrigerating channel 24b (2). At this time, the low-temperature low-pressure refrigerant on the air-conditioning side passes through both the integrated heat exchangers 42 (1) and 42 (2). In the integrated heat exchanger 42 (1), the refrigerant on the refrigeration side exchanges heat with the low-temperature and low-pressure air-conditioning side refrigerant and condenses. However, since the amount of heat exchange obtained in the integrated heat exchanger 42 (1) is smaller than the required amount of heat of condensation of the refrigerated refrigerant, the refrigerated refrigerant cannot be completely condensed and the integrated heat exchanger 42 ( 2). In the integrated heat exchanger 42 (2), the heat is condensed by heat exchange with the high-temperature and high-pressure air-conditioning-side refrigerant and heat exchange with the surrounding air by the action of the blower fan 25c, and expands through the supercooling means 33 and the liquid reservoir 26. The refrigerant expands in the means 23b to become a low-temperature low-pressure refrigerant, evaporates in the refrigeration heat exchanger 22b, and returns to the compressor 21b. The operation when the outside air temperature is too low is the same as the above.

  Next, a method for switching between mode A and mode B will be described with reference to FIG. FIG. 14 is a flowchart showing the flow of mode switching. After the start of the determination (ST1), if the operation on the air-conditioning side is stopped (ST2), the mode is switched to mode B (ST3). In ST4, the flow is separated according to the operation mode.

  In mode B, the air-conditioning-side refrigerant exchanges heat only with the high-temperature and high-pressure refrigeration-side refrigerant, and when the air-conditioning load is not so large, the air-conditioning-side evaporation temperature approaches the high-temperature and high-pressure refrigeration-side refrigerant temperature and increases Becomes When the air-conditioning load increases, the evaporation temperature of the air-conditioning-side refrigerant decreases in order to secure the amount of evaporation heat of the refrigerant. When the air-conditioning load further increases, the relationship of outside air temperature-air-conditioning-side evaporation temperature> α is satisfied. Here, α is a positive constant set originally. When this condition is satisfied, the input of the air-conditioning compressor 21a decreases when outside air is also used to evaporate the air-conditioning-side refrigerant. Then, it is determined whether or not the outside air temperature−the air-conditioning side evaporation temperature> α (ST5). If this condition is satisfied, the mode is switched to mode A (ST6), the amount of heat of the outside air is used for evaporation, and the process exits. (ST9).

  In the case of mode A, the refrigerant on the air-conditioning side exchanges heat with both the high-temperature and high-pressure refrigeration-side refrigerant and the outside air, and the relation: outside air temperature−air-conditioning-side evaporation temperature> 0 holds. When the mode is switched from the mode B to the mode A, the heat transfer area of the evaporator on the air conditioning side increases, so that the value of the outside air temperature-the evaporation temperature on the air conditioning side is the value before the switching (the outside air temperature-the evaporation temperature on the air conditioning side> α). (Α> outside air temperature−air conditioning side evaporation temperature> 0). Thereafter, the ratio between the outside air temperature and the air conditioning-side evaporation temperature increases as the air conditioning load increases, and decreases as the air conditioning load decreases. When the air-conditioning load is further reduced, the relationship of outside air temperature−air-conditioning-side evaporation temperature <β is satisfied. Here, β is a constant originally set and is a value in the range of α> β> 0. When this condition is satisfied, the input to the air conditioning compressor 21a is reduced by evaporating only the heat exchange with the refrigeration side refrigerant without using the outside air to evaporate the air conditioning side refrigerant. Then, it is determined whether or not the outside air temperature−the air conditioning side evaporation temperature <β (ST7). If this condition is satisfied, the mode is switched to the mode B (ST8), and the process is exited (ST9).

  According to the above flow, the switching of the low-pressure flow path switching means can be performed, but the switching from the mode A to the mode B may not be properly performed. That is, switching from mode A to mode B is performed when it is determined that driving in mode B is more efficient. Although the determination is made based on the relationship between the outside air temperature and the air-conditioning side evaporation temperature <β, the value of β is set to a small value because the heat transfer area of the integrated heat exchanger is considerably large. Even if it changes, the outside air temperature minus the air conditioning-side evaporation temperature changes only slightly. In addition, as long as the integrated heat exchanger 42 (2) that absorbs heat from the outside air is used, the relationship of outside air temperature−air-conditioning evaporation temperature> 0 always holds, and this is the lower limit. That is, the sensitivity of the outside air temperature to the air-conditioning-side evaporation temperature to the change in the air-conditioning load is poor, and if the set value of β is incorrect, the switching timing is not appropriate, and there is a possibility that the operating time in a somewhat inefficient place may be increased. is there. Then, it is determined whether or not the outside air temperature−the air conditioning side evaporation temperature> α (ST5). If this condition is satisfied, the operating frequency of the air conditioning compressor 21a at that time is stored as shown in FIG. 15 (ST20). ), The mode is switched to mode A (ST6). When the air-conditioning load decreases, the operating frequency of the air-conditioning compressor 21a also decreases. Therefore, the operating frequency of the air-conditioning compressor 21a is monitored, and when the operating frequency is lower than the frequency stored at the time of the previous mode switching ( Switching from mode A to mode B is performed in ST7a) (ST8). By modifying the control flow in this manner, mode switching may be performed appropriately.

  Next, the case where the air conditioning side performs the cooling operation in the summer will be described. When the air-conditioning side is performing the cooling operation, in FIG. 12, the integrated thermal AC path switching means 34 is set to the position A, and the refrigerant on the air-conditioning side is compressed by the air-conditioning compressor 21a to become a high-temperature high-pressure refrigerant, Through the air conditioning flow path 24a (1) of the integrated heat exchanger 42 (1), it reaches the air conditioning flow path 24a (2) of the integrated heat exchanger 42 (2). At this time, the movement of the refrigerant on the refrigeration side is the same as that described above, and the high-temperature and high-pressure flows to the refrigeration channels 24b (1) and 24b (2) of the integrated heat exchangers 42 (1) and 42 (2). Refrigerant flows in. Therefore, since there is almost no temperature difference between the air conditioning-side refrigerant and the refrigeration-side refrigerant in the integrated heat exchanger, heat exchange between the refrigerants is not performed, and the air-conditioning refrigerant is blown by the blowing fan in the integrated heat exchange 42 (2). Due to the action of 25c, heat exchange is performed only with the ambient air to condense, and the heat is expanded to low-temperature and low-pressure refrigerant by the air-conditioning expansion means 23a via the integrated heat AC path switching means 34, and the air-conditioning indoor heat exchanger 23a as a load Then, the room air is cooled and the air returns to the air conditioning compressor 21a via the flow path switching means 31. In the case of this cooling operation, the refrigeration side and the air conditioning side do not exchange heat and operate almost independently.

  However, since the air-conditioning compressor 21a and the refrigeration compressor 21b are each controlled by an inverter, the temperature of the high-temperature and high-pressure refrigerant in both refrigeration cycle condensers may be different. If this temperature is different, the refrigeration side and the air-conditioning side should operate independently regardless of each other. There is also a possibility. Therefore, the refrigerant circuit may be configured as shown in FIG. In FIG. 13, check valves 35 (1) and 35 (2) are added. With this circuit configuration, during the heating operation, the air-conditioning-side refrigerant passes through the air-conditioning flow path 24a (1) in the integrated heat exchanger 42 (1), and then passes through the check valve 35 (1) and the flow path. The refrigerant flows so as to return to the air conditioning compressor 21a via the switching means 31, and the operation is the same as described above. In the cooling operation, the refrigerant compressed by the air conditioning compressor 21a passes through the flow path switching means 31 and the check valve 35 (2), and passes through the air conditioning flow path 24a () of the integrated heat exchanger 42 (2). 2), the refrigerant on the air conditioning side can be prevented from flowing to the integrated heat exchanger 42 (1), unnecessary heat exchange with the refrigerant on the refrigeration side can be prevented, and the efficiency is always high. You will be able to drive. Note that one or both of the two check valves may be configured as an open / close valve such as an electromagnetic valve, and may be configured to perform an open / close operation to perform the same operation as that of the check valve. That is, by switching the refrigerant flowing through a plurality of integrated heat exchangers provided in series as shown in FIGS. 12 and 13, energy saving operation utilizing the temperature difference of the refrigerant flowing through independent flow paths in the integrated heat exchanger is achieved. By stopping one of the independent flow paths in the integrated heat exchanger, energy saving operation using the size of the radiation fins can be performed according to the season and the outside air temperature.

  As described above, in the configuration of the present invention, by using a compressor such as a scroll or a rotary driven by an inverter-driven DC brushless motor for the air conditioning compressor 21a and the refrigeration or freezing compressor 21b, the efficiency is further improved. Improvements are possible. Further, a plurality of refrigeration cycles for air conditioners may be provided, and an air conditioner connected to a refrigeration cycle dedicated to air conditioning and a condenser of the refrigeration cycle for refrigeration or freezing and heat exchange with an integrated heat exchanger may be provided. That is, as shown in FIG. 1, a plurality of indoor units 12 a and a plurality of indoor units 12 a connected to the refrigeration and air-conditioning integrated unit and a plurality of refrigeration showcases 13 are arranged in a store 14 such as a convenience store. 12b is connected to the outdoor unit for air conditioning 10, and the indoor unit 12a for air conditioning and the refrigeration showcase 13 are connected to the integrated refrigeration and air conditioning unit 11, respectively. In this store 14, the air conditioner including the outdoor unit 10 for air conditioning and the indoor unit 12b for air conditioning is controlled so as to preferentially operate during cooling. That is, when the store is air-conditioned in the cooling mode, the target temperature of the room temperature is set lower than that of the air conditioner including the refrigeration / air-conditioning unit 11 and the air-conditioning indoor unit 12a so that the store is fully operated. The difference between the air conditioner indoor unit 12b and the set value is always larger than the air conditioner indoor unit 12a, and the operation of the air conditioner indoor unit 12b is prioritized.

  On the other hand, the air-conditioning indoor unit 12a connected to the refrigeration / air-conditioning integrated unit 11 having the integrated heat exchanger 42 is controlled so that the operation is prioritized during heating. That is, when the store is operated in the heating mode, the target temperature is set higher than that of the indoor unit 12b for air conditioning, whereby the difference between the detected indoor temperature and the set value is smaller for the indoor air conditioner 12b than for the indoor air conditioner 12b. It always becomes larger, and the operation of the air conditioning indoor unit 12a is prioritized. However, when a common system control device is provided, the air conditioning indoor unit 12b during the cooling operation is preferentially kept in full operation, and when reaching the set value of the room temperature is later than a predetermined time, etc. The operation of the machine 12a may be adjusted. As described above, the air-conditioning indoor unit that is preferentially operated by cooling and heating is provided by a refrigeration cycle dedicated to air conditioning and a heat exchanger integrated with a refrigeration or refrigeration unit provided in the indoor unit as a heat source. By classifying, it is possible to perform optimal operation according to the characteristics of each outdoor unit compared to the conventional in-store system of air conditioners and refrigerators, enabling efficient operation and reducing energy. be able to.

  In addition, although the description here has been given of the case where the integrated refrigeration / air-conditioning machine 11 is housed in one housing, the air-conditioning-side refrigeration cycle and the refrigeration-side refrigeration cycle can exchange heat with the integrated heat exchanger 42. It is only necessary to have such a configuration, and it is not necessary to house it in one housing. For example, as shown in FIG. 16, the refrigeration / air-conditioning integrated machine 11 is composed of two parts, an air-conditioning part 11a and a refrigeration part 11b, each of which is divided into separate casings, and a pipe is provided between both connection valves 36a and 36b. May be connected to form an integrated refrigeration and air conditioning unit. In FIG. 16, the load-side heat exchangers, that is, the load-side connection valve portions 37a and 37b connected to the indoor heat exchanger 22a for air conditioning and the indoor heat exchanger 22b for refrigeration or freezing are connected to the connection portions of the respective housings. A configuration example will be described, but the configuration may be such that these load-side heat exchangers are included in respective housings. With this configuration, the connection valves 36a and 36b are separated and separated into the air-conditioning heat source side connection valve 36a when the store has a larger sales floor area or when the air conditioning load is large, such as when the store is installed in a northern country such as Hokkaido. By connecting a large-capacity condenser, the air-conditioning capacity can be increased, and there is an advantage that the configuration can be made at a lower cost than when another air conditioner is newly installed. It can easily respond to equipment changes rather than equipment expansion, and is also effective for maintenance and other operations. Furthermore, as shown in FIG. 19, the refrigeration / air-conditioning integrated machine 11 is composed of three parts: an air-conditioning part 11a, a refrigeration part 11b, and an integrated heat exchanger part 11c, each of which is divided into separate housings. The connection valves 36a and 36c, 36b and 36c may be connected to form a refrigeration and air-conditioning integrated unit. With such a configuration, the degree of freedom of installation and configuration is further increased, and the integrated heat exchanger unit If a heat exchanger dedicated to air conditioning and a heat exchanger dedicated to refrigeration or freezing are connected instead of 11c, the refrigeration cycle for air conditioning and the refrigeration cycle for refrigeration or freezing can be configured completely separately. A free system can be configured according to needs.

  FIG. 17 shows a case where the integrated heat exchanger 42 is divided into a plurality of parts and can be connected in series, and is housed in a box of the outdoor heat exchanger together with the compressors 21a and 21b and the valves as a heat source unit. . Two of the integrated heat exchangers 42 perform mutual heat exchange between the air-conditioning flow path 24a and the refrigeration or freezing flow path 24b, respectively, and one of them has a plate heat exchanger or a double-pipe heat exchanger. In this manner, the heat exchanger 42 (1) is a refrigerant-refrigerant integrated heat exchanger that does not actively exchange heat with the surrounding air by a blowing fan or the like. The air-cooling integrated heat exchanger 42 (2), which can be connected in series with this, also performs heat exchange with the surrounding air by the blower 25c, and can adjust the amount of heat exchange by changing the rotation speed of the blower 25c. . Other configurations are the same as those in FIGS. 2, 12, 13, and the like, whereby the amount of heat exchange between the two flow paths can be increased. In addition, the heat source unit of the refrigeration and air conditioning system, which is an outdoor unit that has increased the amount of heat exchange and made energy saving measures more effective, is an integrated heat exchanger in which the air conditioning and refrigeration or refrigeration refrigeration cycles are separated independently from each other. 42 (1) and 42 (2) are connected in series with each other for piping during cooling, and allow refrigerant to flow through one of them during heating, so that it is possible to efficiently cope with operating conditions. The other configuration is the same as the configuration of FIGS. 1 to 16 described above, and the operation is the same.

  First, a description will be given of a case where the air conditioning side in the intermediate period and the winter period is stopped or performs the heating operation in the configuration of FIG. When there is no air conditioning load and the refrigerant circulation on the air conditioning side is stopped, the on-off valves 73 and 74 are closed in order to prevent the refrigerant from condensing to the air-cooling integrated heat exchanger 42 (2). The refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature, high-pressure refrigerant, and passes through the refrigeration flow path 24b of the refrigerant-refrigerant integrated heat exchanger 42 (1) to the air-cooled integrated heat exchanger 42 (2). It reaches the cooling passage 24b. At this time, since the refrigerant circulation on the air conditioning side is stopped, no heat exchange is performed in the refrigerant-refrigerant integrated heat exchanger 42 (1). In the air-cooling integrated heat exchanger 42 (2), heat is exchanged with the surrounding air by the action of the blower fan 25c to be condensed, and through the liquid reservoir 26, expanded by the expansion means 23b to become a low-temperature and low-pressure refrigerant. Evaporates in the refrigeration heat exchanger 22b that generates cold air for cooling food or the like at a predetermined low temperature, and returns to the compressor 21b. If the outside air temperature is too low and the high pressure in the refrigeration side refrigeration cycle is too low, the refrigerant is controlled by the open / close valves 76 and 77 as high pressure maintaining means in order to maintain the differential pressure of the expansion means 23b and ensure normal operation. Is flowed to the bypass flow passage 24c to prevent the high pressure from lowering. If the high pressure is still too low, the rotation speed of the blower 25c is reduced. If priority is given to lowering the rotation speed of the blower 25c over the on-off valve 76, the adjustment of the refrigerant becomes unnecessary.

  Next, the case where the heating and air conditioning load is small will be described. When there is not so large air conditioning load, that is, when the air-conditioning-side refrigerant evaporation heat amount <the refrigeration-side refrigerant condensation heat amount, the on-off valve 73 is opened and the on-off valve 74 is closed. The air-conditioning-side refrigerant is compressed by the air-conditioning compressor 21a to become a high-temperature and high-pressure refrigerant, and is sent to the air-conditioning-side indoor heat exchanger 22a, which is a load, to heat the room. The heat is exchanged with the indoor air by the action of the blower fan 25a, condensed, and expanded by the first throttle means 71 to become a low-temperature low-pressure refrigerant. The refrigerant is sent to the passage 24a, where it exchanges heat with the high-temperature, high-pressure refrigerant on the refrigeration side, evaporates, and returns to the air conditioning compressor 21a. On the other hand, the refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, and passes through the refrigeration flow path 24b of the refrigerant-refrigerant integrated heat exchanger 42 (1), and the air-cooled integrated heat exchanger 42 (2). ) To the cooling channel 24b. At this time, since the low-temperature and low-pressure refrigerant on the air-conditioning side passes only through the integrated heat exchanger 42 (1), the refrigerant on the refrigeration side in the refrigerant-refrigerant integrated heat exchanger 42 (1) is It exchanges heat with the refrigerant and condenses. However, since the heat of evaporation on the air conditioning side is not so large, the refrigerant on the refrigeration side does not completely condense and reaches the air-cooling integrated heat exchanger 42 (2). In the air-cooling integrated heat exchanger 42 (2), heat is exchanged with the surrounding air by the action of the blower fan 25c and condensed. The heat is then expanded by the expansion means 23b through the liquid reservoir 26 to become a low-temperature low-pressure refrigerant. Evaporates in the heat exchanger 22b for use and returns to the compressor 21b. The operation when the outside air temperature is too low is the same as the above.

  Next, the case where the air conditioning and heating load is large will be described. When the heating air conditioning load is large, the on-off valve 73 is closed and the on-off valve 74 is opened. The air-conditioning-side refrigerant is compressed by the air-conditioning compressor 21a to become a high-temperature and high-pressure refrigerant, sent to the air-conditioning-side indoor heat exchanger 22a, condensed by exchanging heat with the surrounding air by the action of the blowing fan 25a, and The refrigerant is expanded by the capillary 71 as the expansion means to become a medium-temperature and medium-pressure refrigerant, expanded again by the capillary 72 as the second expansion means, and sent to the air-conditioning passage 24a of the air-cooling integrated heat exchanger 42 (2). . In the air-cooling integrated heat exchanger 42 (2), heat is exchanged with the surrounding air by the action of the blower 25c, and the evaporated refrigerant returns to the air conditioning compressor 21a. On the other hand, the refrigerant on the refrigeration side is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, passes through the refrigeration flow path 24b of the refrigerant-refrigerant integrated heat exchanger 42 (1), and the on-off valve 77 is closed and the on-off valve Since 76 is open, the flow path 24b for cooling of the air-cooling integrated heat exchanger 42 (2) does not pass, and the air flows from the expansion means 23b to the refrigerated showcase heat exchanger 22b. At this time, the low-temperature low-pressure refrigerant on the air-conditioning side passes through both the integrated heat exchangers 42 (1) and 42 (2). In a refrigeration cycle on the air conditioning side during heating and air conditioning with a large load, a circuit configuration in which a throttling means is provided before and after the refrigerant-refrigerant integrated heat exchanger 42 (1) makes the refrigerant-refrigerant integrated heat exchanger at medium pressure. The amount of heat exchange with the refrigeration-side refrigerant is reduced by increasing the evaporation temperature of the refrigerant passing through the refrigerant. For example, the refrigerant for air conditioning is 4 ° C. for the refrigerant 30 ° C. for refrigeration, and the refrigerant for air conditioning is 20 ° C. If these two restricting means are each a capillary tube, the structure and control are simplified. Of course, when the interlocking control is performed by the electronic expansion valve, the controllability is good, so that the performance is further improved.

  In the refrigeration cycle, in this case, the high-temperature and high-pressure refrigerant discharged from the compressor is condensed by the refrigerant-refrigerant integrated heat exchanger, expanded via the on-off valve 76, expanded by the expansion valve 23b, evaporated by the heat exchanger 22b, and compressed. Machine 21b. In the refrigeration cycle on the refrigeration side, the amount of heat exchange in the refrigerant-refrigerant integrated heat exchanger 42 (1) is reduced but the flow rate of the refrigerant is not reduced, so that the air-cooled integrated heat exchanger is bypassed to prevent the high pressure from decreasing. I have. That is, even if the air conditioning is stopped or the heating load is small or large, the air-cooling integrated heat exchanger has a circuit configuration in which the refrigerant flows only for air conditioning or refrigeration, in other words, If the refrigerant flows, the circuit configuration is such that the effective heat transfer area is enlarged, so that the performance is improved.

  During the cooling operation in the circuit of FIG. 17, first, the flow of the refrigerant in the air conditioning-side refrigeration cycle is discharged from the compressor 21a, passes through the four-way valve, and the on-off valve 73 is closed and the on-off valve 74 is opened. Via the air-cooling integrated heat exchanger 42 (2), the second throttle means 72, the refrigerant / refrigerant integrated heat exchanger 42 (1), and the first throttle means 71, the air-conditioning indoor unit 22a evaporates and performs cooling to perform compression. Returned to the machine. On the other hand, the flow of the refrigerant in the refrigeration side refrigeration cycle is discharged from the compressor 21b, passes through the heat recovery plate heat exchanger 42 (1) which is a refrigerant-refrigerant integrated compressor, the on-off valve 77 is opened, and the on-off valve 76 is opened. Since it is closed, it returns from the air-cooled integrated heat exchanger 42 (2) to the compressor through the expansion means 23b and the showcase heat exchanger 22b. As described above, the refrigeration cycle for both the air conditioning and the refrigeration is operated so as to exhibit the performance independently of each other. However, in the circuit configuration of FIG. 17, the air conditioning is performed by the refrigerant / refrigerant heat exchanger 42 (1). Since the refrigerant for use has a medium pressure by the two throttle means, the temperature of the air-conditioning-side refrigerant is lower than that of the refrigeration-side refrigerant, and the refrigerant-refrigerant-type heat exchanger 42 (1) is connected between the air-conditioning side and the refrigeration side. Causes heat transfer. Since the COP on the air conditioning side is originally better than the COP on the refrigeration side, the performance of air conditioning during cooling and the total performance of refrigeration can be improved by this heat transfer. That is, COP = capacity / input. The lower the evaporating temperature, the higher the input. To obtain a low refrigeration temperature, the deterioration of the COP is corrected by the flow of the refrigerant on the air conditioning side, so that the performance of the entire apparatus can be improved.

  Although the above description has been given with reference to the capillary tubes 71 and 72, if the pressure of the air-conditioning refrigerant in the refrigerant-refrigerant integrated heat exchanger 42 (1) is adjusted by the electronic expansion valve, not only does the performance increase, but also as described above. In addition, the heat transfer during cooling can be automatically adjusted according to the operating condition. By this adjustment, the overall performance can be improved, and for example, the total input can be reduced depending on the cooling condition. FIG. 18 shows a structural view of the integrated heat exchanger 42, which is the same as that of FIG. 4 except that four points of the refrigerant inlet / outlet of the heat exchanger are provided at one end. . In the case where an inlet / outlet which is a connection with the refrigerant pipe is not provided at both ends as shown in FIG. 4, but is provided at one side as shown in FIG. Brazing can be performed from the space facing one end, so that the work with the machine is simplified, and the work time can be shortened such that all four locations can be brazed at the same time at the time of manufacture. . Although the description here has been made mainly on the case where the refrigerator is a refrigerator refrigerator, the same configuration can be applied to the case of a refrigerator refrigerator, and the same effect can be obtained.

  In the configuration in FIG. 17, the flow of the refrigerant to a plurality of integrated heat exchangers provided for the air-conditioning-side refrigerant cycle can be made to flow to only one of the plurality, to the whole, or to change the flow direction. Accordingly, it is possible to perform the operation in consideration of the efficiency of the entire apparatus according to the outside air condition and the required level of the air conditioning operation only by the operation on the air conditioning side. In addition, control to minimize the energy according to the required level of refrigeration and refrigeration, the state of outside air and the required level of air conditioning by operating the refrigerant flow and the fan on the refrigeration side considering the heat transfer of the integrated heat exchanger Can be performed under the conditions and control flow preset in the microcomputer of the control device. In addition, although the flow-path switching means 31 has been described as an example of a four-way valve, any means may be used as long as it can switch the flow path of the refrigerant flowing inside the pipe. For example, a plurality of solenoid valves, two-way valves, and three-way valves may be used.

  In many of the configuration diagrams of the present embodiment, the supercooling means 33 is shown to be installed on the upstream side of the liquid reservoir 26. The configuration in which the means 33 is not provided may be adopted, and the same effect is obtained. Further, the supercooling means 33 may be installed downstream of the liquid reservoir 26, and in this case, there is an effect that the refrigerating capacity of the refrigeration or freezing indoor unit 22b as a showcase can be increased. .

  FIG. 20 is a configuration diagram of a refrigeration / air-conditioning apparatus that can obtain the same operation and effect as described above of the present invention with a simple configuration. In the configuration shown in FIG. 20, the open / close valve and other flow path switching means are not provided around the integrated heat exchangers 42 (1) and 42 (2) of the refrigeration side refrigeration cycle. During the operation, the refrigerant is always moving in the same manner with respect to the integrated heat exchanger, and is compressed by the refrigeration compressor 21b to become a high-temperature and high-pressure refrigerant, and is refrigerated by the refrigerant-refrigerant integrated heat exchanger 42 (1). The air-cooling integrated heat exchanger 42 (2) reaches the refrigeration flow path 24b (2) via the flow path 24b (1). That is, the refrigeration cycle is greatly simplified. In this configuration, a plurality of integrated heat exchangers 42 (1) or 42 (2) are provided in the same manner as described above, depending on the operation mode of heating / cooling / stopping on the air conditioning side or the difference in the circulation flow path depending on the size of the air conditioning load. In the above, it is possible to make a state in which a large amount of heat exchange is performed with the air conditioning-side refrigerant, a small amount of heat exchange is performed, or no heat exchange is performed. In the refrigeration side refrigeration cycle, in the air-cooled integrated heat exchanger 42 (2), the remaining amount of heat necessary for the refrigerant to condense is obtained by radiating heat to the surrounding air by the action of the blower fan 25c, and condensed. Through the reservoir 26, the refrigerant expands in the expansion means 23b to become a low-temperature low-pressure refrigerant, and evaporates in the refrigeration heat exchanger 22b that generates cold air for cooling the load, such as food, at a predetermined low temperature, and is compressed by the compressor 21b. Return to In this configuration, when the outside air temperature is too low and the high pressure in the refrigeration side refrigeration cycle is too low, the differential pressure of the expansion means 23b cannot be maintained, and the refrigerant becomes difficult to flow, so that the low pressure is reduced and the refrigeration is performed. Even if the compressor 21b is stopped, the ON / OFF control that the compressor 21b starts moving again when the low pressure is restored after a short period of time secures the cooling heat required for maintaining the freshness of the food. Although it has been described above that a high pressure is controlled by providing a condenser bypass path in the refrigeration side refrigeration cycle, ON / OFF is automatically performed without providing a bypass flow path in the refrigeration side refrigeration cycle. With a simple configuration using control, the high pressure is reduced, so that more efficient operation can be performed.

  Next, the operation of the air-conditioning-side refrigerant when the air-conditioning side performs the heating operation will be described. The air-conditioning-side refrigerant is compressed by the air-conditioning compressor 21a to become a high-temperature and high-pressure refrigerant, and is sent to the air-conditioning-side indoor heat exchanger 22a, which is a load, to heat the room. Then, by the action of the blower fan 25a, heat is exchanged with the indoor air to condense, and is expanded by the air-conditioning expansion means 23a to become a low-temperature low-pressure refrigerant. Here, when the refrigerating compressor 21b is operating, since the heat can be recovered from the refrigerating-side refrigerant, the mode is set to the refrigerator main mode (opening / closing valve 73, closing 74, closing 78). Then, the refrigerant on the air-conditioning side is sent to the air-conditioning flow path 24a (1) of the refrigerant-refrigerant integrated heat exchanger 42 (1), where it exchanges heat with the high-temperature and high-pressure refrigeration-side refrigerant and evaporates, and is checked. The air returns to the air conditioning compressor 21a through the valve 35. Since the refrigerant circulating in the refrigeration cycle evaporates and gasifies by absorbing heat from the surrounding medium in the evaporator, the temperature of the refrigerant in the evaporator cannot be higher than the temperature of the surrounding medium. In the refrigerator-main mode, the air-conditioning-side refrigerant absorbs heat from the high-temperature refrigeration-side refrigerant in the integrated heat exchanger 42 (1) and evaporates. It is determined by the temperature of the refrigeration-side refrigerant and the amount of heat exchange in the integrated heat exchanger 42 (1) and can be kept at a high value, so that extremely efficient operation is possible. However, when the refrigerating compressor 21b is stopped, heat cannot be recovered from the refrigerating-side refrigerant, so that the air conditioner is in the independent operation mode (opening / closing valve 73, opening 74, opening 78). At this time, the refrigerant on the air-conditioning side is sent to the air-conditioning passage 24a (2) of the air-cooling integrated heat exchanger 42 (2), where it exchanges heat with the ambient air and evaporates, and the air-conditioning compressor 21a Since the air conditioner is operated at a low pressure (evaporation temperature) in the refrigeration cycle on the air conditioning side due to the influence of cold outside air, the efficiency is lower than in the refrigerator main mode. Therefore, although it is originally desired to operate in the refrigerator-main mode as much as possible, the operation cannot always be performed in the refrigerator-main mode. The reason will be described below.

  In the refrigerator-main mode, when the air-conditioning / heating load is small or moderate, the amount of heat exchange with the refrigeration-side refrigerant in the refrigerant-refrigerant heat exchanger 42 (1) is not so large. The operable state is maintained, and the refrigerator-main mode can be maintained. However, when the air-conditioning and heating load is large, the amount of heat exchange with the refrigeration side refrigerant in the refrigerant-refrigerant integrated heat exchanger 42 (1) increases, so that the high pressure of the refrigeration side refrigeration cycle decreases. When the operation of the refrigeration side refrigeration cycle can be continued, the refrigerant flow path on the air conditioning side is not switched, and the operation is performed in an efficient circuit as in the case where the air conditioning load is small. However, in the refrigeration-side refrigeration cycle, when the high pressure drops too much and the operation cannot be continued, the refrigeration compressor 21b is stopped, and if the flow path is left as it is, the evaporation heat amount of the air-conditioning-side refrigerant cannot be secured. Then, the mode is switched to the air conditioner main mode (opening / closing valve 73 closed, 74 open, 78 open), and the air-cooling integrated heat exchanger 42 (2) absorbs heat from the outside air to continue the operation. When the refrigerating compressor 22b starts operating again and heat can be recovered from the refrigerating-side refrigerant, the mode is switched again to the refrigerator main mode (opening of the on-off valves 73, 74, and 78), and the refrigerant-refrigerant integrated heat exchange is performed. In the heat exchanger 42 (1), heat is exchanged with the refrigeration-side refrigerant to operate.

  In addition, even in the defrosting operation when the frost formation on the heat exchanger 22b of the showcase that is the indoor unit for refrigeration or freezing is excessively increased, the same switching needs to be performed because the refrigeration compressor 21b stops. There is.

  Further, it is desirable that the switching of the on-off valve in accordance with ON / OFF of the refrigeration compressor 21b be performed immediately before the refrigeration compressor 21b stops, but the refrigerant-cooler integrated heat exchanger 42 (1) and the inside thereof Since the flowing refrigerant on the refrigeration side has a heat capacity, it can be seen that even if switching is performed immediately after the refrigeration compressor 21b is stopped, the operation can be continued without lowering the low pressure on the air conditioning side to a point where the operation cannot be continued. ing.

  However, when the refrigerant on the air conditioning side is performing heat exchange with the high-temperature and high-pressure refrigeration refrigerant in the refrigerant-refrigerant integrated heat exchanger 42 (1), the low pressure is high, but the air-cooled integrated heat exchanger 42 (2). When heat exchange is performed with cold outside air, the low pressure is reduced. If this change occurs abruptly, liquid back to the air-conditioning compressor 21a occurs, and if this is repeated many times, the air-conditioning compressor 21a may be broken and the operation may not be continued. There is.

  Therefore, in practice, it is desirable to take one of the following methods with the stoppage of the refrigeration compressor 21b. First, the first method is a method in which a protection function against liquid back by mode switching is provided in a hardware manner, and a method in which a throttle such as a capillary tube having a large diameter is provided before and after the on-off valve 74. Then, when the flow path is switched, the refrigerant that has passed through the air-conditioning expansion means 23a is once throttled, so that a large amount of refrigerant can be prevented from returning to the air-conditioning compressor 21a at once.

  The second method is to temporarily stop the air conditioning compressor 21a when the refrigeration compressor 21b stops. The reason why the liquid back occurs in the air conditioning compressor 21a and the compressor is damaged is that the refrigerant circulating during the refrigeration cycle returns to the compressor at a stretch by drawing in the low pressure. Is stopped to stop the movement of the refrigerant, and then, after a short time, for example, after three minutes, the air-conditioning compressor 21a is operated again, and the operation becomes the same as the normal restart, and the liquid back occurs. Absent. In this method, the air-conditioning compressor 21a is temporarily stopped. However, even if heating cannot be performed for a short time, there is no problem because the room has heat capacity.

The operation flowchart of FIG. 21 is a flowchart of the operation based on the second method. In FIG. 21, when the processing flow chart is entered (ST31), the refrigeration compressor 21b is ON (ST32), and Δt ₁ hour has elapsed since the refrigeration compressor 21b was ON (ST33), the refrigerator The mode is switched to the main mode (opening / closing valve 73, closing 74, closing 78) (ST34). The Δt ₁ hour is a stabilization wait time when the refrigerating compressor 21b is restarted, and may be generally several minutes, but may be zero in some cases. Then, after Δt ₂ hours have elapsed since the refrigerator compressor 21b was turned on (ST35), the start-up control is terminated in the refrigerator-side cycle, and the process shifts to the normal control (ST36). However, when the refrigerating compressor 21b is turned off (ST32), and when the mode is the refrigerator-main mode (ST37), the amount of heat for evaporating the air-conditioning-side refrigerant cannot be secured in the refrigerant-refrigerant integrated heat exchanger. It is necessary to switch the heat source to the air-cooled integrated heat exchanger. However, in order to prevent the liquid from flowing back to the air-conditioning compressor 21a, the air-conditioning compressor 21a is temporarily turned off (ST38), and then the air-conditioner alone operation mode (open / close) The valve 73 is closed, 74 is opened, and 78 is opened) (ST39). Then, after the air conditioning compressor 21a is turned off, the refrigerant waits for Δt ₄ hours, for example, 3 minutes (ST43) until the refrigerant is stabilized (ST43). Thereafter, the air conditioning compressor 21a is turned on, the air conditioning compressor 21a is set to the initial startup frequency, and The use expansion valve 23a is set to the initial startup opening (ST44). Then, the state is held for Δt ₃ hours and the cycle is stabilized (ST41), and thereafter, the process shifts to the air conditioner normal control (ST42), and the process ends (ST45).

  The third method is that when the refrigeration compressor 21b is stopped, the frequency of the air conditioning compressor 21a is reduced, the opening of the air conditioning expansion valve 23a is reduced, and this state is maintained until the state of the air conditioning refrigerant is stabilized. It is to keep it for a certain period of time. At the time of normal startup, such a movement is performed, but a similar movement may be performed. By doing so, the flow rate of the refrigerant circulating in the refrigeration cycle can be kept small, and the amount of the refrigerant passing through the expansion valve 23a can be reduced, thereby preventing damage to the compressor due to liquid back to the compressor. it can.

The operation flowchart of FIG. 22 is a flowchart of the operation based on the third method. In FIG. 22, the process from the start of the process flowchart (ST31) to the end of the start-up control of the refrigerator-side cycle and the transition to the normal control (ST36) is the same as the operation flowchart of FIG. 21 and will not be described. When the refrigerating compressor 21b is turned off (ST32) or in the refrigerator main mode (ST37), the heat source for evaporating the air-conditioning-side refrigerant cannot be secured in the refrigerant-refrigerant integrated heat exchanger, so that the heat source is not used. It is necessary to switch to the air-cooling integrated heat exchanger, but in order to prevent liquid back to the air-conditioning compressor 21a, the air-conditioning compressor 21a is fixed at a lower frequency, and the air-conditioning expansion valve 23a is fixed at a slightly throttled opening. Then, the circuit is switched to the air conditioner independent operation mode (ST39). Thereafter, it waits for Δt ₅ hours until the state of the air conditioning-side refrigeration cycle is stabilized (ST51), shifts to the air conditioner normal control (ST42), and ends the process (ST45).

  By any of the above methods, liquid back to the air conditioning compressor 23a can be prevented, damage to the compressor can be prevented, and stable operation can be achieved. If the air-conditioning compressor 23a has sufficient strength to withstand the liquid back caused by the flow path switching, it goes without saying that such a protective operation need not be performed.

  Here, an example has been described in which, when the refrigerator 21b is stopped and then started again, the mode is switched to the refrigerator-main mode after a certain period of time has elapsed. By doing so, it is possible to extend the operation time in the efficient refrigerator-main mode, thereby saving energy. However, even in the air conditioner main mode, when the refrigeration compressor is stopped, the air-cooling integrated heat exchanger can be occupied because the air-conditioning-side refrigerant evaporates, so the actual heat transfer area increases, and the outdoor heat exchange The operation is more efficient than operating the independent air conditioner. Therefore, even if the air conditioner is kept in the single operation mode when the compressor 21b is restarted after stopping, it is possible to obtain an operational problem or an energy saving effect.

  Next, the cooling operation will be described. In the cooling operation, the on-off valve 73 is closed, 74 is open, and 78 is open. Then, the air-conditioning-side refrigerant is discharged from the compressor 21a, passes through the four-way valve 31, passes through the on-off valve 78, reaches the air-cooling integrated heat exchanger 42 (2), and exchanges heat with the surrounding air by the action of the blower 25c. Then, the refrigerant is condensed, passes through the on-off valve 74, becomes low-temperature low-pressure refrigerant by the air-conditioning expansion means 23a, evaporates in the air-conditioning indoor unit 22a, is cooled, and is returned to the compressor 21a. This movement is the same whether the refrigeration compressor 21b is moving or stopped. In addition, since the movement of the refrigeration cycle is always the same, the description when the air conditioning refrigeration cycle is stopped will be omitted.

  With the above configuration, during the heating operation, the refrigerant for cooling and the refrigerant for air conditioning are efficiently exchanged heat by the refrigerant-refrigerant integrated heat exchanger, and the state is reduced to the limit at which the refrigerator for cooling can operate. By continuing, efficient operation can be performed for a long time, so that a great energy saving effect can be obtained.At the time of the cooling operation, the air-conditioning refrigerant does not flow to the refrigerant-refrigerant integrated heat exchanger. Irrespective of the temperature of the refrigerant on both the condensing side of the air conditioning side, that is, regardless of the frequency of both compressors, it is possible to prevent heat exchange between the refrigerants and prevent inefficient operation, always as designed Performance can be exhibited. That is, in the configuration of FIG. 20 as well, a plurality of integrated heat exchangers are provided, and by switching the flow of the refrigerant to the integrated heat exchangers individually, the same effect as described above can be obtained.

  FIG. 23 shows a configuration in which a plurality of air-conditioning expansion units 23a are connected in series, an intermediate-pressure receiver 79 is provided therebetween, and the refrigerant in the suction side of the air-conditioning compressor 21a can exchange heat with the refrigerant in the intermediate-pressure receiver 79. It is what was constituted. With this configuration, the excess refrigerant on the air-conditioning side can be stored in the intermediate-pressure receiver 79, so that the amount of refrigerant in the heat exchangers 22a and 24a can be kept optimal, and efficient operation can always be performed. It can be carried out. Furthermore, even if there is some liquid back in the air conditioning compressor 21a, it can be evaporated by heat exchange between the intermediate pressure receiver 79 and the suction pipe, and a highly reliable refrigeration cycle can be configured. Other configurations are the same as those in FIG. 20, and the operations and effects are the same as those described above.

  FIG. 24 is a structural view of an air-cooling integrated heat exchanger, in which an air-conditioning flow path 24a and a refrigeration or freezing flow path 24b are separated and inserted into the same radiating fin 41 to be integrated. As described above, since the air conditioning flow path 24a and the refrigeration or freezing flow path 24b are separated on both sides of the heat exchanger, the heat exchange between the evaporation heat of the air conditioning refrigeration cycle during the air conditioning and heating and the condensation heat of the refrigeration refrigeration cycle is performed. The structure is not very large. By doing so, the flow path through which both refrigerants flow does not cross, thereby simplifying the manufacture. When the refrigerant is not flowing through one flow path, the flowing refrigerant is part of the other fin. Can be used for condensing or evaporating, and can be operated more efficiently than when each is configured separately.

  FIG. 25 is a configuration diagram of the refrigeration / air-conditioning apparatus, and illustrates a detection unit used for the basic operation of the refrigeration / air-conditioning apparatus of FIG. As the detection means, the air-conditioning-side discharge temperature detecting means 53, the air-conditioning-side indoor saturation temperature detecting means 54, the air-conditioning-side liquid pipe temperature detecting means 55, and the air-conditioning two-phase pipe temperature detecting means (for heating) are provided in the refrigerant pipe of the air-conditioning refrigeration cycle. 56 (1) and air-conditioning two-phase tube temperature detecting means (for cooling) 56 (2), refrigeration side low pressure detecting means 61 and refrigeration side high pressure detecting means 62 in the refrigerant pipe of the refrigeration side refrigeration cycle, and indoor for air temperature detection The air temperature detecting means 51, the outside air temperature detecting means 57 and the inside temperature detecting means 64 are attached.

  In the figure, in the refrigerator-main mode, the refrigeration-side refrigeration cycle presets the refrigeration-side low pressure detected by the refrigeration-side low-pressure detection unit 61 and the refrigeration-side high pressure detected by the refrigeration-side high-pressure detection unit 62. The frequency of the refrigerating-side compressor 21b and the number of revolutions of the air-cooling integrated heat exchanger blower fan 25c are controlled so as to approach the target value. Note that, as the low-pressure and high-pressure target values on the refrigeration side, values capable of operating the system with energy saving are stored in the memory in advance. Further, a refrigeration load side on-off valve 80 is opened and closed by a controller separately installed to keep the temperature detected by the in-compartment temperature detection means 64 constant.

  The air conditioning side refrigeration cycle is a heating operation in the refrigerator main mode, and the discharge temperature is detected by the air conditioning side discharge temperature detecting means 53, the condensing temperature is detected by the air conditioning side indoor saturation temperature detecting means 54, and the air conditioning side liquid pipe is operated. The temperature of the liquid pipe is detected by the temperature detecting means (heating) 55 (1), the evaporation temperature is detected by the air-conditioning side liquid pipe temperature detecting means (cooling) 55 (2), and the temperature of the air-conditioning two-phase pipe temperature detecting means (heating) 56 At (1), the intake air temperature is detected by the indoor air temperature detecting means 51 at the intake air temperature. The superheat defined by the difference between the suction temperature and the evaporation temperature, the subcool defined by the difference between the condensation temperature and the liquid pipe temperature, the room temperature difference defined by the difference between the condensation temperature and the room air temperature, and the discharge The air-conditioning compressor 21a, the air-conditioning-side expansion valves 23a (1), 23a (2), and the air-cooling integrated heat exchanger blower fan 25c are controlled to target the temperature. In the refrigerator main mode, the air-conditioning two-phase tube temperature detecting means (cooling) 56 (2) is not used because it is not in the refrigerant flow path.

  On the other hand, the air-conditioning side refrigeration cycle is a cooling operation in the air conditioner independent operation mode. The condensing temperature, the liquid pipe temperature by the air-conditioning side liquid pipe temperature detecting means (cooling) 55 (2), the evaporation temperature by the air-conditioning side liquid pipe temperature detecting means (heating) 55 (1), the air-conditioning side indoor saturation temperature The detecting means 54 detects the intake air temperature, and the indoor air temperature detecting means 51 detects the indoor air temperature. The superheat defined by the difference between the suction temperature and the evaporation temperature, the subcool defined by the difference between the condensation temperature and the liquid pipe temperature, the room temperature difference defined by the difference between the condensation temperature and the room air temperature, and the discharge The air-conditioning compressor 21a, the air-conditioning-side expansion valves 23a (1), 23a (2), and the air-cooling integrated heat exchanger blower fan 25c are controlled to target the temperature. Note that, in the air conditioner independent operation mode, the temperature detected by the air-conditioning two-phase tube temperature detecting means (heating) 56 (1) is not used because it is not the temperature of a portion required as information.

  As described above, depending on whether the air-conditioning side refrigeration cycle is the heating operation or the cooling operation, the temperature detecting means is used as the air-conditioning two-phase pipe temperature detecting means (cooling) 56 (1) and the air-conditioning two-phase pipe temperature detecting means (cooling) 56 ( It is necessary to switch in 2), and as the method, a method of switching by software and a method of switching by hardware using a relay or the like can be considered.

  Further, the air-cooling integrated heat exchanger 42 (2) functions as a condenser of the refrigeration side refrigeration cycle in the refrigerator main mode, and functions as an evaporator of the air conditioning side refrigeration cycle in the air conditioner independent operation mode. In mode, it functions as a condenser for both refrigeration cycles. Accordingly, the air-cooling integrated heat exchanger blower fan 25c operates to save energy in the refrigeration side refrigeration cycle in the refrigerator-main mode, and operates to save energy in the air conditioning-side refrigeration cycle in the air conditioner independent operation mode. By operating in the cooling mode, the total energy consumption of the refrigeration side refrigeration cycle and the air conditioning side refrigeration cycle is reduced, and energy saving operation can be realized throughout the year.

  The refrigeration-side low-pressure detection means 61 and the refrigeration-side high-pressure detection means 62 can be replaced by temperature detection means for detecting the saturation temperature of each pressure.

  Also, here, the explanation has been made as if the refrigeration or freezing-side refrigeration cycle had only one indoor unit showcase. However, as shown in FIG. Case) is connected. At this time, for example, referring to FIG. 25 as an example, the refrigerator 21b, the integrated heat exchanger 24b, the blower fan 25c, and the liquid reservoir 26 are housed and installed in one or a plurality of housings outdoors. A plurality of refrigeration or refrigeration load side on-off valves 80, refrigeration or refrigeration expansion means 23b, refrigeration or refrigeration heat exchangers 22b and a plurality of blower fans 25b are installed indoors, and the liquid reservoir 26 and refrigeration or refrigeration load side on / off are installed. A branch is made between the valve 80 and the valve 80. In the other configuration diagrams, the refrigeration or refrigeration load-side on-off valve 80 is omitted for simplicity, but the refrigeration or refrigeration load-side on-off valve 80 is located near the refrigeration or refrigeration expansion means 23b, respectively. It is installed corresponding to the showcase. As the indoor unit of the refrigeration cycle, an open showcase for refrigeration or freezing, a reach-in showcase for refrigeration or freezing, a unit cooler for refrigeration or freezing, and the like are connected. Each detecting means is connected to a control device including a microcomputer mounted on a substrate provided in an electric component box in a housing provided outdoors or indoors, and data and data stored in the microcomputer in advance. The control is performed based on the determination and calculation based on the flowchart.

  In the case of the configuration of FIGS. 20 to 25, a third heat exchanger, that is, a heat exchanger that exchanges heat between the air-conditioning-side refrigeration cycle and the flow path that independently flows the refrigerant circulating in the refrigeration or refrigeration-side refrigeration cycle, A plurality is provided, one is mainly performing heat exchange directly between the refrigerants, and the other is forcibly releasing heat between both refrigerants and air through a common radiating fin. This makes it possible to switch between this one and another one heat exchanger. That is, in the example of the configuration in FIG. 20, when the first refrigerant flows through the heat exchanger 42 (1), the second refrigerant does not flow through the heat exchanger 42 (2). When the first refrigerant flows through the heat exchanger 42 (2), the first refrigerant does not flow through the heat exchanger 42 (1). On the other hand, the second refrigerant always flows through both heat exchangers 42 (1) and 42 (2). By simplifying the control of the refrigeration cycle on the refrigeration / refrigeration side and switching the flow path of the refrigerant in the refrigeration cycle on the air conditioning side, the system also simplifies heat control such as heat release in air conditioning operation. The whole can be operated stably, and the device can be made highly reliable.

  Further, assuming that a plate heat exchanger is used as the refrigerant-refrigerant integrated heat exchanger and a plate-fin type heat exchanger is used as the air-cooled integrated heat exchanger, the refrigerant-refrigerant integrated heat exchanger is an air-cooled integrated heat exchanger. The heat transfer rate (index indicating thermal efficiency) is several to several tens times larger than that of the exchanger, and heat exchange can be performed very efficiently. It can be made compact. Therefore, by dividing the integrated heat exchanger into a refrigerant-cooled integrated heat exchanger and an air-cooled integrated heat exchanger, it is possible to perform an efficient operation that effectively uses the exhaust heat of the refrigeration side and the air conditioning side, In addition, a compact system that does not become so large in space can be configured as compared with the configuration of only the air-cooling integrated heat exchanger.

  In addition, when the amount of heat exchange in the refrigerant-refrigerant integrated heat exchanger is as large as possible, the low pressure (evaporation temperature) of the air conditioning-side refrigeration cycle can be increased, and efficient operation can be performed. However, in practice, if it is too large, the high pressure (condensation temperature) of the refrigeration side refrigeration cycle becomes too low, and ON / OFF frequently occurs. At convenience stores, the amount of heat exchange in the refrigerant-cooled integrated heat exchanger is limited by the heat exchange in the air-cooled integrated heat exchanger because of the relationship between the heating and air conditioning load and the refrigeration load, the need to maintain high pressure in the refrigeration side refrigeration cycle, and cost performance. The size of the heat exchanger is selected to be smaller than the exchange amount.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room-temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low-temperature air and a second refrigerant. And a third heat exchanger in which refrigerants passing through independent flow paths of a first flow path connected to the first heat exchanger and a second flow path connected to the second heat exchanger can exchange heat with each other. Heat exchanger, and a bypass flow path provided in the second flow path according to a preset condition, a part or all of the second refrigerant is bypassed to the third heat exchanger, Therefore, even when the high pressure part of the refrigeration cycle of a refrigeration or refrigeration apparatus having an integrated heat exchanger as a heat source is likely to be unstable at low pressure, stable operation can be performed.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And a first flow path having a first compressor connected to the first heat exchanger and a second flow path having a second compressor connected to the second heat exchanger, respectively. A third heat exchanger in which each refrigerant passing through the flow path that can exchange heat with each other, a blower that adjusts the amount of heat exchange between the third heat exchanger and the surrounding air, and a predetermined by driving the first compressor A controller that performs a predetermined refrigeration or refrigeration operation by driving the air-conditioning operation and the second compressor, and changes a blower amount of the blower in a direction to reduce both compressor inputs, so that at any time, Efficient operation can be performed in any operation mode.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room-temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low-temperature air and a second refrigerant. And a third heat exchanger in which refrigerants passing through independent flow paths of a first flow path connected to the first heat exchanger and a second flow path connected to the second heat exchanger can exchange heat with each other. The third heat exchanger is provided with the first flow path in the second flow path, or the second flow path and the first flow path are plate-shaped both sides Therefore, a device having a small size, a simple structure and low energy can be obtained.

  The refrigeration air conditioner of the present invention includes a bypass flow path provided in the second flow path of the third heat exchanger and bypassing part or all of the second refrigerant to the third heat exchanger. Therefore, efficient and stable operation is possible.

  As described above, the refrigeration / air-conditioning apparatus of the present invention includes a first heat exchanger provided on the load side of a first refrigeration cycle through which a plurality of refrigerants are circulated to perform indoor air conditioning, and a second heat exchanger. A second heat exchanger that performs refrigeration or freezing provided in a second refrigeration cycle independent of the first refrigeration cycle in which the refrigerant is circulated, and at least one flow path on the heat source side of the first refrigeration cycle. A third heat exchanger that exchanges heat with the second refrigerant that passes through the flow path of the second refrigeration cycle, wherein the first refrigeration does not exchange heat with the third heat exchanger during cooling. Priority is given to the operation of performing the flow of the refrigerant to the flow path on the heat source side of the cycle, and during the heating, the flow of the refrigerant to the flow path on the heat source side of the first refrigeration cycle performing heat exchange with the third heat exchanger. The operation to be performed has priority. In this case, the flow path on the heat source side of the first refrigeration cycle that does not exchange heat with the third heat exchanger is the third heat exchange that exchanges heat with the second refrigerant passing through the flow path of the second refrigeration cycle. The operation of the entire refrigeration and air-conditioning system composed of the plurality of first heat exchangers and the second heat exchangers carrying the load is independent of the operation and the operation mode, It enables efficient, low-energy operation without being constrained.

  The refrigeration air conditioner of the present invention includes a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, and a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant. And a third heat exchanger integrally provided so that the first and second two flow paths have independent flow paths and the refrigerant passing through the respective flow paths exchange heat with each other, A first refrigeration cycle in which the first heat exchanger and the first flow path of the third heat exchanger are connected by piping, and a second refrigeration cycle of the second heat exchanger and the third heat exchanger. A second refrigeration cycle, which is connected to the flow path of the second refrigeration cycle by a pipe, and a bypass provided in the second flow path and capable of bypassing part or all of the refrigerant of the second refrigeration cycle through the third heat exchanger. A flow path and high-pressure maintaining means for adjusting the flow rate of the refrigerant flowing to the bypass flow path in accordance with the pressure on the high pressure side of the second refrigeration cycle. In this case, the second cold air has a lower temperature than the first cold air.

  The refrigeration / air-conditioning apparatus of the present invention is configured such that a junction between a bypass flow path provided in the second flow path or the second refrigeration cycle and bypassing the third heat exchanger and the second flow path or the second refrigeration cycle is provided. And supercooling means for the refrigerant arranged on the downstream side of the cooling medium. As a result, the operation of the refrigeration cycle of the refrigeration or refrigerating apparatus becomes stable over a wide range, and enables more accurate temperature control.

  The refrigeration / air-conditioning apparatus of the present invention is provided with a fourth heat exchanger that is disposed in a bypass flow path that bypasses a third heat exchanger provided in the second flow path or the second refrigeration cycle and exchanges heat with ambient air. , The stable refrigeration cycle for refrigeration or freezing can be operated even in a configuration in which the integrated heat exchanger is provided in the heat source. Further, the refrigeration air conditioner of the present invention is arranged in the second bypass flow path that bypasses the first flow path or the third heat exchanger provided in the first refrigeration cycle and exchanges heat with ambient air. With the fifth heat exchanger, a large-capacity and efficient operation is possible for any type of air conditioning at any time.

  In the refrigeration / air-conditioning apparatus of the present invention, the third heat exchanger is a double pipe having an inner side as the flow path of the first refrigeration cycle and an outer side as the flow path of the second refrigeration cycle. Can be In the refrigeration / air-conditioning apparatus of the present invention, the third heat exchanger is formed by a first heat exchange unit capable of adjusting the amount of heat exchange and a second heat exchange unit not adjusting the amount of heat exchange. Therefore, the amount of heat exchange can be adjusted according to the operation state, and a practical device is possible.

  The refrigeration and air-conditioning apparatus of the present invention has a third heat exchanger, a first heat exchange unit that has a fan and adjusts the heat exchange amount by changing the air flow with the speed changed from the stop of rotation, and the heat exchange amount. It is formed by the second heat exchange section without the means for adjusting, and the operation of the fan is selected in accordance with the operation mode of both the flow paths or the refrigeration cycle, so that it is possible to always perform the operation of reducing the energy. . Further, the refrigerating air conditioner of the present invention includes a heat exchange unit bypass circuit that provides a first heat exchange unit and a second heat exchange unit in series and bypasses at least one of the first and second heat exchange units. Therefore, it is possible to always operate with reduced energy.

  In the refrigeration / air-conditioning apparatus of the present invention, since the check valve or the on-off valve is provided in the heat exchange unit bypass circuit, useless heat exchange operation of the refrigeration cycle can be prevented.

  The operation method of the refrigeration / air-conditioning apparatus of the present invention includes a first heat exchanger provided in the first refrigeration cycle in which the refrigerant is circulated to perform room air conditioning, and a first refrigeration cycle in which the second refrigerant is circulated. And a second heat exchanger provided for independent refrigeration cycle and performing refrigeration or freezing, and heat exchange between the refrigerant passing through the first refrigeration cycle and the second refrigerant passing through the flow path of the second refrigeration cycle. An operation in which a third heat exchanger and a compressor are provided in the first refrigeration cycle and the second refrigeration cycle, and the operation of the first and second refrigeration cycles is performed by adjusting at least the rotation speed of the compressor. In a refrigeration air-conditioning apparatus comprising: a refrigeration air conditioner comprising: adjusting the operation status adjustment means to perform an air conditioning operation in the first refrigeration cycle, and performing a refrigeration or freezing operation in the second refrigeration cycle; Third heat exchanger Adjusting the amount of heat exchange of the third heat exchanger by means of heat, and bypassing part or all of the second refrigerant provided to the second refrigeration cycle to the third heat exchanger, Comprising at least one of adjusting the operating condition adjusting means and adjusting and bypassing the heat exchange amount of the third heat exchanger so as to reduce the compression ratio of both the first and second refrigeration cycles. Selection makes it possible to operate efficiently at any time.

  As described above, the refrigeration / air-conditioning apparatus of the present invention has a refrigeration refrigeration-side refrigeration cycle apparatus, an air-conditioning-side refrigeration cycle apparatus, and a refrigeration cycle between both refrigeration cycles by attaching and disassembling the pipe connection portion of the third heat exchanger. Since it can be freely combined like a third heat exchanger that can exchange heat, the installation space can be handled flexibly as an outdoor unit of a refrigeration cycle connected to an air conditioning indoor unit or a showcase placed indoors It is possible to reduce the installation space, and to arrange them separately and conveniently. In addition, a simple device can be used to obtain an inexpensive device that can reduce energy. The present invention also relates to any operating conditions, such as changing the temperature setting such as the season or the temperature of the outside air, operating the compressor at a constant speed, etc. It can be easily adapted to be changed according to the setting, or to always operate the compressor at a constant speed, etc. Expansion and changes can be adapted, and outdoor equipment can be easily added. Further, a refrigeration / air-conditioning apparatus and a method thereof capable of operating without waste of energy can be obtained. As described above, the present invention can provide an easy-to-use device such as flexible equipment change, and can perform an operation method with low energy in any situation.

  The present invention provides a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant, A third heat exchanger in which refrigerant passing through independent flow paths of a first flow path connected to the heat exchanger and a second flow path connected to the second heat exchanger can exchange heat with each other And a bypass flow path provided in the second flow path and capable of adjusting the amount of the second refrigerant flowing through the third heat exchanger, so that the bypass flow path can be used in the entire refrigeration / air-conditioning apparatus. Energy reduction can be easily obtained without using.

  The present invention provides a first heat exchanger that performs heat exchange between normal-temperature air and a first refrigerant, a second heat exchanger that performs heat exchange between low-temperature air and a second refrigerant, A plurality of third heats in which refrigerant passing through independent flow paths of the first flow path connected to the heat exchanger and the second flow path connected to the second heat exchanger can exchange heat with each other. Exchanger, and a bypass flow path that is connected to the first flow path or the second flow path and bypasses the refrigerant to at least one of the plurality of third heat exchangers. It is possible to obtain a refrigeration / air-conditioning apparatus that can easily reduce energy by switching the third heat exchanger according to the operation state.

  The present invention provides a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant, A first flow path having a first compressor connected to the heat exchanger and a second flow path having a second compressor connected to the second heat exchanger are independent flow paths. A third heat exchanger through which each of the refrigerants can exchange heat with each other, and a blower that adjusts the amount of heat exchange between the third heat exchanger and the surrounding air, are provided by a predetermined operation by driving the first compressor. A refrigeration and air-conditioning system that can easily reduce energy because it performs air conditioning operation and predetermined refrigeration or refrigeration operation by driving the second compressor, and changes the blower volume of the blower in a direction to reduce both compressor inputs. Can be obtained.

  The present invention provides a first heat exchanger that performs heat exchange between room temperature air and a first refrigerant, a second heat exchanger that performs heat exchange between low temperature air and a second refrigerant, The refrigerant passing through independent flow paths of the first flow path connected to the heat exchanger and the second flow path connected to the second heat exchanger can exchange heat directly with each other. An auxiliary heat exchanger having a blower that is connected to at least one of the first flow path and the second flow path and is provided in parallel with the third heat exchanger and adjusts the amount of heat exchange with ambient air. , So that the third heat exchanger can have a simple structure in which the heat transfer between the refrigerant and the refrigerant capable of directly transferring heat can be performed, and further, a refrigeration / air-conditioning apparatus capable of reducing energy can be obtained. Can be done.

  Since the third heat exchanger of the present invention is formed of a plurality of heat exchange units, and the plurality of heat exchange units are arranged in parallel or in series or switchable with respect to the refrigerant passing through the independent flow paths, respectively, An easy-to-use refrigeration and air-conditioning apparatus that can be used in various ways can be obtained.

  According to the present invention, the third heat exchanger is formed of a first heat exchange unit capable of adjusting the amount of heat exchange and a second heat exchange unit that does not adjust the amount of heat exchange. Since the section and the second heat exchange section are arranged so as to be parallel, serial or switchable with respect to the flow of the refrigerant, a refrigeration and air-conditioning apparatus having a simple configuration and large energy reduction can be obtained.

  According to the present invention, since at least one of the plurality of heat exchange units forming the third heat exchanger is provided with a bypass flow path for bypassing the refrigerant flowing through the heat exchange unit, the refrigeration system has a simple configuration and a large energy reduction. An air conditioner is obtained.

  The present invention is a plurality of heat exchange units forming a third heat exchanger, wherein the first refrigerant flows, or the heat exchange unit connected to the first refrigeration cycle, bypasses the flowing refrigerant. By providing the bypass flow path and bypassing the heat exchange unit capable of adjusting the amount of heat exchange during operation of the compressor that discharges the second refrigerant, a highly reliable refrigeration air-conditioning apparatus with a simple configuration can be obtained.

  The present invention is a plurality of heat exchange units forming a third heat exchanger, wherein the first refrigerant flows, or the heat exchange unit connected to the first refrigeration cycle, bypasses the flowing refrigerant. By providing a bypass flow path and bypassing the heat exchange unit that does not adjust the amount of heat exchange while the compressor that discharges the second refrigerant is stopped, a refrigeration / air-conditioning apparatus with high energy saving effect can be obtained.

  The present invention is a plurality of heat exchange units forming a third heat exchanger, wherein the first refrigerant flows, or the heat exchange unit connected to the first refrigeration cycle, bypasses the flowing refrigerant. A bypass flow path is provided, and when the compressor that discharges the second refrigerant switches the bypass flow path according to whether the compressor is stopped or in operation, the first refrigerant is not sucked into the compressor that sucks the first refrigerant. Since the liquid-back protection means for delaying the change of the refrigerant is provided, a refrigeration / air-conditioning apparatus having high reliability and using less energy can be obtained.

  The third heat exchanger of the present invention is provided with a first heat exchange unit that has a blower and adjusts the heat exchange amount by changing the air flow with the speed changed from the rotation stop, and a means for adjusting the heat exchange amount. Since the air conditioner is formed by the second heat exchanging section and the operation of the blower is selected in accordance with the operation mode of both the flow paths or the refrigeration cycle, a refrigeration air conditioner with a simple structure and low energy can be obtained.

  The present invention parallels an air-cooled integrated heat exchanger that adjusts the amount of heat exchange with ambient air by a blower and a refrigerant-cooled integrated heat exchanger that mainly performs heat exchange between the first refrigerant and the second refrigerant. Alternatively, a third heat exchanger is formed so as to be connectable in series or switchable, and is referred to as a heat exchanger between the first heat exchanger and the refrigerant-refrigerant integrated heat exchanger in the first flow path and the refrigerant-refrigerant integrated heat exchanger. Since the air conditioner is provided between the air-cooling integrated heat exchanger and the expansion means for expanding the first refrigerant, an easy-to-use refrigeration / air-conditioning apparatus capable of various operations can be obtained.

  The third heat exchanger of the present invention has a first flow path provided in the second flow path, or has the second flow path and the first flow path as plate-like two-sided flow paths. Alternatively, since the heat transfer tubes that form the flow path have the radiation fins, a refrigeration / air-conditioning apparatus that can be configured according to the use and capacity of the apparatus can be obtained.

  The present invention provides a first heat exchanger provided in a first refrigeration cycle in which a refrigerant is circulated to perform air conditioning of a room, and a second refrigeration independent of the first refrigeration cycle in which a second refrigerant is circulated. A second heat exchanger provided in the cycle for refrigeration or freezing, and a third heat exchanger for the refrigerant passing through the first refrigeration cycle to exchange heat with the second refrigerant passing through the flow path of the second refrigeration cycle Operating condition adjusting means for providing a compressor or the like in the first refrigeration cycle and the second refrigeration cycle, and performing operation of the first and second refrigeration cycles by turning on / off the compressor or the like or adjusting the rotation speed at least And performing a refrigeration or refrigeration operation in a second refrigeration cycle while performing an air conditioning operation in a first refrigeration cycle by adjusting operating condition adjusting means for a refrigeration air-conditioning apparatus including: Installed in the heat exchanger Adjusting the amount of heat exchange of the third heat exchanger by a blower, and bypassing the refrigerant to the third heat exchanger provided in the second refrigeration cycle, or the refrigerant circulating in the second refrigeration cycle A step of continuing refrigeration or freezing by stopping for a short period of time, so that a method for operating a refrigeration / air-conditioning apparatus having a large energy reduction effect can be obtained by a simple method.

  The present invention provides a first heat exchanger provided in a first refrigeration cycle in which a first refrigerant is circulated to perform room air conditioning, and a second heat exchanger independent of the first refrigeration cycle in which a second refrigerant is circulated. A second heat exchanger provided in the second refrigeration cycle for performing refrigeration or freezing, and the first refrigerant passing through the first refrigeration cycle exchanges heat with the second refrigerant passing through the flow path of the second refrigeration cycle. An air-cooled integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower, and a refrigerant-refrigerant integrated heat exchanger that mainly performs direct heat exchange between the first refrigerant and the second refrigerant, or Performing a refrigeration or refrigeration operation in a second refrigeration cycle while performing an air conditioning operation in a first refrigeration cycle for a refrigeration air-conditioning apparatus including a third heat exchanger that can be connected in series or switchable. And cooling for the first refrigeration cycle The operation is mainly performed by the air-cooling integrated heat exchanger, and the operation is mainly performed by the refrigerant-cooled integrated heat exchanger at the time of heating. A driving method is obtained.

  The present invention provides a first heat exchanger provided in a first refrigeration cycle in which a first refrigerant is circulated to perform room air conditioning, and a second heat exchanger independent of the first refrigeration cycle in which a second refrigerant is circulated. A second heat exchanger provided in the second refrigeration cycle for performing refrigeration or freezing, and the first refrigerant passing through the first refrigeration cycle exchanges heat with the second refrigerant passing through the flow path of the second refrigeration cycle. A third heat exchanger, an air-cooled integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower, and a refrigerant-cooled integrated type that mainly performs direct heat exchange between the first refrigerant and the second refrigerant A third heat exchanger that allows the heat exchanger to be connected in series, and an opening / closing unit that is provided in the first refrigeration cycle and switches the flow path of the refrigerant-cooled integrated heat exchanger or the air-cooled integrated heat exchanger, Air-conditioning operation in the first refrigeration cycle Performing a refrigeration or refrigeration operation in a second refrigeration cycle, and opening and closing the first refrigerant to flow through a refrigerant-refrigerant integrated heat exchanger and not flowing into an air-cooled integrated heat exchanger. And the step of flowing only the second refrigerant into the air-cooling integrated heat exchanger, so that an operation method of the refrigeration / air-conditioning apparatus using less energy can be obtained.

  The present invention allows heat transfer between the air conditioning side and the refrigeration or freezing side with an air-cooling integrated heat exchanger during heating and air conditioning, and refrigeration or the air conditioning side with a refrigerant / coolant integrated heat exchanger during cooling air conditioning. Since heat is transferred to and from the refrigeration side, a method of operating the refrigeration / air-conditioning apparatus having a large energy reduction effect is obtained.

  The present invention provides at least one of adjusting the operating condition adjusting means so as to reduce the compression ratio of both the first and second refrigeration cycles, and adjusting the heat exchange amount of the third heat exchanger. Is selected, an easy-to-use refrigeration / air-conditioning apparatus operating method can be obtained.

1 is a connection diagram of an air conditioner / refrigerator of a store such as a convenience store, showing an example of an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The Mollier diagram which shows operation | movement of the refrigerating air conditioner which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Structure | structure explanatory drawing of the integrated heat exchanger which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Structure | structure explanatory drawing of the integrated heat exchanger which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Structure | structure explanatory drawing of the integrated heat exchanger which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a flowchart showing an operation of the refrigeration / air-conditioning apparatus showing one example of an embodiment of the present invention. 5 is a flowchart showing an operation of the refrigeration / air-conditioning apparatus showing one example of an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS Structure | structure explanatory drawing of the integrated heat exchanger which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a flowchart showing an operation of the refrigeration / air-conditioning apparatus showing one example of an embodiment of the present invention. 5 is a flowchart showing an operation of the refrigeration / air-conditioning apparatus showing one example of an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. BRIEF DESCRIPTION OF THE DRAWINGS Structure | structure explanatory drawing of the integrated heat exchanger which shows an example of Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Explanation of reference numerals

  DESCRIPTION OF SYMBOLS 10 Air conditioning outdoor unit, 11 Refrigeration air-conditioning integrated unit, 12a Air conditioning indoor unit connected to the refrigeration air-conditioning integrated unit 11, 12b Air conditioning indoor unit connected to the air conditioning outdoor unit 10, 13 Refrigeration or freezing showcase , 14 stores, 21a air conditioning compressor, 21b refrigeration or freezing compressor, 22a air conditioning indoor heat exchanger, 22b refrigeration or freezing indoor heat exchanger, 22c supercooling heat exchanger, 22d refrigeration or Sub-heat exchanger for refrigeration, 22e Sub-heat exchanger for air conditioning, 23a Expansion means for air conditioning, 23b Expansion means for refrigeration or freezing, 23c Expansion means for supercooling, 24a Air conditioning flow path, 24b Refrigeration or freezing flow Road, 24c bypass flow path, 24d supercooled refrigerant flow path, 25a air conditioning indoor heat exchanger fan, 25b refrigeration or freezing heat exchange Fan, 25c blower for integral heat exchanger, 25d refrigeration or freezing sub-heat exchanger, 22d blower, 25e blower for air conditioner sub-heat exchanger 22e, 26 reservoir, 31 four-way valve Path switching means, 32 high pressure maintaining means or flow path control means, 33 supercooling means, 34 integrated heat AC path switching means, 35 check valve, 36 heat source side connection valve, 37 load side connection valve, 41 for integrated heat exchanger Radiating fins, 42 integrated heat exchanger, 51 indoor air temperature detecting means, 52 air conditioning side heat exchanger temperature detecting means or pressure detecting means, 53 air conditioning side discharge temperature detecting means, 54 air conditioning side indoor saturation temperature detecting means, 55 air conditioning Side liquid pipe temperature detecting means, 56 air conditioning side two-phase pipe temperature detecting means, 57 outside air temperature detecting means, 61 refrigeration Low pressure detecting means or evaporating temperature detecting means or means for detecting the ambient temperature of the indoor heat exchanger for refrigeration or freezing; 62 refrigeration side condensation temperature detecting means or high pressure detecting means; 63 refrigeration side discharge temperature detecting means; 64 internal temperature detecting means 71 Capillary as first throttle means, 72 Capillary as second throttle means, 73 Air-conditioning-side flow path switching on-off valve, 74 Air-conditioning-side flow path switching on-off valve, 75 on-off valve, 76 Refrigeration side or freezing Open / close valve for maintaining high pressure on the side, 77 Refrigeration side or on / off valve for maintaining high pressure on the refrigeration side, 78 On / off valve, 79 Medium pressure receiver, 80 On / off valve for refrigeration or refrigeration load side.

Claims (25)

A first heat exchanger that performs heat exchange between the normal temperature air and the first refrigerant, a second heat exchanger that performs heat exchange between the low temperature air and the second refrigerant, and the first heat exchange. A first heat path connected to the device and a third heat exchanger in which refrigerant passing through independent flow paths of the second flow path connected to the second heat exchanger can exchange heat with each other, A second refrigerant flow rate adjustment that is provided in the second flow path and is capable of adjusting the amount of the second refrigerant flowing through the third heat exchanger to a refrigerant amount different from the amount flowing through the second heat exchanger. And a refrigerating air conditioner. A first heat exchanger that performs heat exchange between the normal temperature air and the first refrigerant, a second heat exchanger that performs heat exchange between the low temperature air and the second refrigerant, and the first heat exchange. A plurality of third heat exchangers in which refrigerant passing through independent flow paths of a first flow path connected to the heat exchanger and a second flow path connected to the second heat exchanger can exchange heat with each other. And a bypass flow path connected to the first flow path or the second flow path and bypassing the refrigerant to at least one of the plurality of third heat exchangers. Refrigeration and air conditioning equipment. A first heat exchanger that performs heat exchange between the normal temperature air and the first refrigerant, a second heat exchanger that performs heat exchange between the low temperature air and the second refrigerant, and the first heat exchange. A first flow path having a first compressor connected to the second heat exchanger and a second flow path having a second compressor connected to the second heat exchanger. A third heat exchanger in which the refrigerants can exchange heat with each other, and a blower that adjusts the amount of heat exchange between the third heat exchanger and the surrounding air, and a predetermined heat driven by the first compressor. Refrigeration characterized by performing a predetermined refrigeration or freezing operation by air-conditioning operation and driving of the second compressor, and changing a blowing amount of the blower in a direction to reduce a total value of both compressor inputs. Air conditioner. A first heat exchanger that performs heat exchange between the normal temperature air and the first refrigerant, a second heat exchanger that performs heat exchange between the low temperature air and the second refrigerant, and the first heat exchange. A third heat exchanger capable of directly exchanging heat with refrigerant passing through independent flow paths of a first flow path connected to the heat exchanger and a second flow path connected to the second heat exchanger. And an auxiliary heat exchanger that is connected to at least one of the first flow path and the second flow path and that is provided in parallel with the third heat exchanger and adjusts a heat exchange amount with ambient air. And a refrigerating air conditioner comprising: A first heat exchanger for performing room air conditioning on the load side of a plurality of first refrigeration cycles in which a refrigerant circulates, and a second heat exchanger independent of the first refrigeration cycle in which a second refrigerant is circulated. A second heat exchanger that is provided in the refrigeration cycle and performs refrigeration or freezing on the load side, and a first refrigerant that passes through at least one refrigeration cycle of the plurality of first refrigeration cycles is a second refrigeration cycle. A third heat exchanger that exchanges heat on the heat source side with the second refrigerant passing therethrough, during cooling to the flow path of the first refrigeration cycle that does not exchange heat with the third heat exchanger. Priority is given to the operation of performing the flow of the refrigerant, and during heating, the operation of performing the flow of the refrigerant to the flow path of the first refrigeration cycle performing heat exchange with the third heat exchanger is prioritized. Refrigeration air conditioner. A first heat exchanger that performs heat exchange between the normal temperature air and the first refrigerant, and a second heat exchanger that performs heat exchange between the low temperature air and the second refrigerant, and the first and second A third heat exchanger integrally provided so that the two passages have independent passages and the refrigerants passing through the passages exchange heat with each other, and the first heat exchanger, A first refrigeration cycle formed by connecting a first flow path of the third heat exchanger with a pipe, and a second flow path of the second heat exchanger and the third heat exchanger. And a second refrigeration cycle connected by piping, and a part or all of the refrigerant connected to at least one of the first and second refrigeration cycles and flowing through the refrigeration cycle bypasses the third heat exchanger. Possible bypass flow path, and provided in at least one of the first and second refrigeration cycles to the bypass flow path Refrigerating and air-conditioning apparatus characterized by comprising: a flow path control means for adjusting the to refrigerant flow, a. The third heat exchanger is formed of a plurality of heat exchange units, and the plurality of heat exchange units are arranged in parallel or in series or one of the plurality of heat exchange units with respect to the refrigerant passing through independent flow paths. The refrigeration / air-conditioning apparatus according to any one of claims 1 to 6, wherein the refrigeration / air-conditioning apparatus is disposed so as to be switchable. The third heat exchanger is formed of a first heat exchange unit capable of adjusting the amount of heat exchange and a second heat exchange unit that does not adjust the amount of heat exchange, and the first heat exchange unit 8. The method according to claim 1, wherein the second heat exchanging unit is arranged in parallel or in series with the flow of the refrigerant or so that one of the plurality of heat exchanging units can be switched to the other. The refrigeration and air-conditioning apparatus according to the above. 9. The at least one of a plurality of heat exchange units forming the third heat exchanger, a bypass flow path for bypassing a refrigerant flowing through the heat exchange unit is provided. A refrigeration / air-conditioning apparatus according to any one of the above. A plurality of heat exchange units forming the third heat exchanger, wherein a first refrigerant flows, or a heat exchange unit connected to the first refrigeration cycle, a bypass flow capable of bypassing the flowing refrigerant. A path is provided, wherein the heat exchanger that can adjust the internal heat exchange amount of the plurality of heat exchangers forming the third heat exchanger is bypassed while the compressor that discharges the second refrigerant is operating. The refrigeration / air-conditioning apparatus according to any one of claims 1 to 9, wherein A plurality of heat exchange units forming the third heat exchanger, wherein a first refrigerant flows, or a heat exchange unit connected to the first refrigeration cycle, a bypass flow capable of bypassing the flowing refrigerant. Providing a passage, while the compressor that discharges the second refrigerant is stopped, to bypass the heat exchange unit that does not adjust the internal heat exchange amount of the plurality of heat exchange units that form the third heat exchanger. The refrigeration / air-conditioning apparatus according to any one of claims 1 to 10, wherein: The plurality of heat exchangers forming the third heat exchanger, the heat exchanger for adjusting the amount of heat exchange, and the surrounding air, regardless of whether it is an air-cooled integrated heat exchanger or a refrigerant-cooled integrated heat exchanger. 12. The heat exchanger according to claim 1, further comprising a blower for adjusting a heat exchange amount, or adjusting a heat exchange amount by adjusting a refrigerant amount flowing through the heat exchanger. Refrigeration air conditioner. In the heat exchanger that does not adjust the amount of heat exchange, which is a plurality of heat exchange units forming the third heat exchanger, heat exchange between the first refrigerant flowing through the first flow path and the surrounding air is performed. 13. The refrigeration / air-conditioning apparatus according to claim 1, wherein the refrigeration and air conditioning is not performed. A plurality of heat exchangers forming the third heat exchanger, wherein the first refrigerant flows, or at least one of the heat exchangers connected to the first refrigeration cycle, the refrigerant flowing Provide a bypass flow path for bypassing, when the compressor that discharges the second refrigerant switches over the bypass flow path according to whether the compressor is stopped or in operation, the compressor that sucks the first refrigerant does not suck the liquid refrigerant 14. The refrigeration / air-conditioning apparatus according to claim 1, further comprising a liquid back protection means for delaying a change in the flow of the first refrigerant. The downstream side of the junction between the second flow path or the second refrigeration cycle and the bypass flow path that bypasses the third heat exchanger and the junction of the second flow path or the second refrigeration cycle The refrigeration / air-conditioning apparatus according to any one of claims 1 to 14, further comprising: means for supercooling the refrigerant arranged in the refrigeration system. The third heat exchanger has a blower, a first heat exchange unit that adjusts the heat exchange amount by a change in the amount of air whose speed has been changed from the rotation stop, and does not include a unit that adjusts the heat exchange amount. The first flow path and the second flow path are formed by a second heat exchange portion that directly exchanges heat, and the operation of the blower is adjusted to a state of a refrigerant flowing in both the flow paths or an operation mode of a refrigeration cycle. The refrigeration / air-conditioning apparatus according to any one of claims 1 to 15, wherein the refrigeration / air-conditioning apparatus is selected. An air-cooled integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower and a refrigerant-refrigerant integrated heat exchanger that mainly performs heat exchange between the first refrigerant and the second refrigerant or The third heat exchanger is formed so as to be connectable in series or switchable, and is provided in the second flow path where a part or all of the second refrigerant is bypassed with respect to the air-cooling integrated heat exchanger. The refrigeration / air-conditioning apparatus according to any one of claims 1 to 16, further comprising: a bypass flow path. An air-cooling integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower and a refrigerant-refrigerant integrated heat exchanger that mainly performs heat exchange between the first refrigerant and the second refrigerant are arranged in parallel or in series. Alternatively, the third heat exchanger is formed so as to be switchably connectable, and between the first heat exchanger and the refrigerant-refrigerant integrated heat exchanger in the first flow path, and the refrigerant-refrigerant integrated heat exchange The refrigeration / air-conditioning apparatus according to any one of claims 1 to 17, further comprising: a throttling means provided between the heat exchanger and the air-cooling integrated heat exchanger to expand the first refrigerant. An air-cooling integrated heat exchanger that adjusts the amount of heat exchange with ambient air by a blower and a refrigerant-cooled integrated heat exchanger that mainly performs heat exchange between the first refrigerant and the second refrigerant. In the third heat exchanger, the size of the heat exchange unit is reduced by making the heat exchange amount of the refrigerant-refrigerant integrated heat exchanger smaller than that of the air-cooled integrated heat exchanger. Item 19. A refrigerating air conditioner according to any one of Items 1 to 18. The third heat exchanger performs heat transfer by using the first flow path and the second flow path as a double pipe, or separates the first flow path and the second flow path into a plate shape and passes on both sides. 20. The method according to any one of claims 1 to 19, wherein the heat transfer is performed as a heat transfer tube, or the heat transfer tube forming the first flow passage and the second flow passage has a common radiation fin. Refrigeration air conditioner. A first heat exchanger that is provided in a first refrigeration cycle in which a refrigerant is circulated and performs room air conditioning, and is provided in a second refrigeration cycle independent of the first refrigeration cycle in which a second refrigerant is circulated. A second heat exchanger that performs refrigeration or freezing, and a third heat exchanger that exchanges heat between the refrigerant passing through the first refrigeration cycle and the second refrigerant passing through the flow path of the second refrigeration cycle And, the first refrigeration cycle and the second refrigeration cycle each provided with a compressor or the like, the operation of the first and second refrigeration cycle by turning on or off at least the compressor or the like or adjusting the rotation speed Operating condition adjusting means for performing the air conditioning operation in the first refrigeration cycle by adjusting the operating condition adjusting means, and refrigeration or freezing in the second refrigeration cycle. luck Performing, and adjusting the heat exchange amount of the third heat exchanger by a blower provided in the third heat exchanger, the third heat exchanger provided in the second refrigeration cycle Operating the refrigeration and air-conditioning system by bypassing the refrigerant or stopping the refrigerant circulating in the second refrigeration cycle for a short time to continue refrigeration or freezing. A first heat exchanger provided in the first refrigeration cycle in which the first refrigerant is circulated to perform room air conditioning, and a second refrigeration independent of the first refrigeration cycle in which the second refrigerant is circulated A second heat exchanger provided in the cycle for performing refrigeration or freezing, and the first refrigerant passing through the first refrigeration cycle exchanges heat with the second refrigerant passing through the flow path of the second refrigeration cycle. An air-cooled integrated heat exchanger that adjusts the amount of heat exchange with the surrounding air by a blower, and a refrigerant-refrigerant integrated heat exchanger that mainly performs direct heat exchange between the first refrigerant and the second refrigerant. In parallel with the third heat exchanger that can be switched or connected in series, and with a refrigeration air-conditioning device, while performing an air-conditioning operation in the first refrigeration cycle, refrigeration or in the second refrigeration cycle Before and after performing the refrigeration operation Operating the air-cooling integrated heat exchanger mainly during cooling for the first refrigeration cycle, and operating mainly the refrigerant-cooled integrated heat exchanger during heating during heating. How to operate a refrigeration and air conditioning system. A first heat exchanger provided in the first refrigeration cycle in which the first refrigerant is circulated to perform room air conditioning, and a second refrigeration independent of the first refrigeration cycle in which the second refrigerant is circulated A second heat exchanger provided in the cycle for performing refrigeration or freezing, and the first refrigerant passing through the first refrigeration cycle exchanges heat with the second refrigerant passing through the flow path of the second refrigeration cycle. A third heat exchanger, an air-cooled integrated heat exchanger that adjusts the amount of heat exchange with ambient air by a blower, and a refrigerant refrigerant that mainly performs direct heat exchange between the first refrigerant and the second refrigerant An integrated heat exchanger that can be connected in series to the third heat exchanger; and a flow path provided in the first refrigeration cycle, the refrigerant-cooled integrated heat exchanger or the air-cooled integrated heat exchanger. Opening / closing means for switching the first air conditioner. Performing an air-conditioning operation in a cycle and performing a refrigeration or freezing operation in the second refrigeration cycle; and opening and closing the opening / closing means to flow the first refrigerant to a refrigerant-refrigerant integrated heat exchanger, and A method of operating a refrigeration / air-conditioning apparatus, comprising: a step of not flowing the integrated refrigerant into the integrated heat exchanger; and a step of flowing only the second refrigerant through the integrated air-cooled heat exchanger. At the time of heating and air conditioning, heat transfer is performed between the air conditioning side and the refrigeration or freezing side by the air-cooling integrated heat exchanger. The method for operating a refrigeration / air-conditioning apparatus according to any one of claims 21 to 23, wherein heat transfer is performed between the refrigeration and air conditioning apparatus. At least one of adjustment of the operating condition adjustment means and adjustment of the heat exchange amount of the third heat exchanger so as to reduce the compression ratio of both the first and second refrigeration cycles is selected. The method for operating a refrigeration / air-conditioning apparatus according to any one of claims 21 to 24, wherein:

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