JPWO2011158305A1 - Refrigeration air conditioner - Google Patents

Abstract

A refrigeration and air conditioning system that can handle air conditioning loads such as cooling and heating loads and refrigeration / refrigeration loads at the same time, and that can supply a stable heat source throughout the year. The refrigerating and air-conditioning apparatus 100 uses the heat or cold stored in the primary-side refrigerant as an air-conditioning load via the indoor heat exchanger 118, while the cold stored in the primary-side refrigerant is used as the first refrigerant-refrigerant heat. By transmitting to the secondary refrigerant circulating through the refrigeration / refrigeration refrigeration cycle 2 via the exchanger 131, it can be used as a refrigeration / refrigeration load.

Description

  The present invention relates to a refrigeration air conditioner that includes a heat pump cycle and integrates an air conditioner and a refrigeration apparatus, and particularly relates to a refrigeration air conditioner that can stably supply a heat source throughout the year.

  Conventionally, a refrigerating and air-conditioning apparatus that integrates an air-conditioning apparatus and a refrigeration apparatus using a cascade heat exchanger and simultaneously provides a cooling load, a heating load, and a hot water supply load by a two-way refrigeration cycle has been proposed.

  As such, “an air conditioning system unit that includes an air conditioning compressor, a heat source side heat exchanger, and a use side heat exchanger and performs air conditioning of the air-conditioned room by the use side heat exchanger, and a cooling compressor. A cooling system unit including a condenser and an evaporator for cooling a cooling storage facility disposed in the air-conditioned room, a low-pressure side air-conditioning refrigerant of the air-conditioning system unit, and a high-pressure side of the refrigeration system unit Remote control means for supplying various instructions including operation / stop to the air conditioning system unit in an air conditioning refrigeration apparatus provided with a cascade heat exchanger that is supplied with a cooling refrigerant and supercools the cooling refrigerant with the air conditioning refrigerant Air conditioning refrigeration apparatus comprising a prohibiting means for prohibiting at least instructions other than operation / stop among the instructions by the remote operation means when the cooling compressor of the cooling system section is operated. Has been (even if , See Patent Document 1).

  Further, “a refrigerant circuit for air conditioning composed of a compressor, a heat source side heat exchanger, a decompression device, and a use side heat exchanger, a refrigerant circuit for a cooling storage facility composed of a compressor, a condenser, a decompression device, and an evaporator, A cascade heat exchanger and a supercooling heat exchanger for exchanging heat between the low pressure side of the air conditioning refrigerant circuit and the high pressure side of the cooling storage facility refrigerant circuit, and the cooling during the heating operation of the air conditioning refrigerant circuit There has been proposed a “refrigeration system” in which the high-pressure side refrigerant in the refrigerant circuit for storage facilities is passed through the cascade heat exchanger and the condenser to the supercooling heat exchanger (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2005-249241 (page 4-5, FIG. 1 etc.) JP 2007-100706 (page 4-5, FIG. 1 etc.)

  However, in the refrigerating and air-conditioning apparatuses described in Patent Document 1 and Patent Document 2, most of the air-conditioning circuit and the compressor of the refrigeration / refrigeration circuit are configured as one heat source unit, and the air-conditioning load The heat source unit could not be selected due to the difference in the ratio of refrigeration / refrigeration load. In addition, since it is necessary to connect piping from the heat source unit to all load-side units, this leads to an increase in the amount of piping used and an increase in the amount of refrigerant, which increases installation costs.

  The present invention has been made to solve the above problems, and is a refrigeration air conditioner capable of simultaneously processing an air conditioning load such as a cooling load and a heating load and a refrigeration / refrigeration load and capable of supplying a stable heat source throughout the year. It is intended to provide.

  In the refrigeration air conditioner according to the present invention, an air conditioning compressor, a heat source side heat exchanger, a first throttle means, and a use side heat exchanger are connected in series, and the air conditioning compressor, the heat source side The primary side of the heat exchanger, the second throttle means, and the first refrigerant-refrigerant heat exchanger are connected in series, and the air-conditioning refrigeration cycle for circulating the primary side refrigerant, the refrigeration compressor, and the first refrigerant-refrigerant A refrigerating / refrigerating refrigeration cycle in which a secondary side of the heat exchanger, a third throttling means, and a refrigeration heat exchanger are connected in series to circulate the secondary side refrigerant, and the primary side refrigerant Refrigeration / refrigeration load by transmitting the cold heat stored in the primary side refrigerant to the secondary side refrigerant while making the stored hot or cold heat available as an air conditioning load via the use side heat exchanger It is possible to use as.

  According to the refrigerating and air-conditioning apparatus according to the present invention, it is possible to simultaneously process an air-conditioning load and a refrigeration / refrigeration load, and a stable heat source can be supplied throughout the year.

It is a refrigerant circuit figure which shows an example of the refrigerant circuit structure of the refrigerating air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a refrigerant circuit diagram which shows the flow of the refrigerant | coolant at the time of the cooling main operation | movement of the refrigerating and air-conditioning apparatus which concerns on Embodiment 1 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerant circuit structure of the refrigeration air conditioning apparatus which concerns on Embodiment 2 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerant circuit structure of the refrigeration air conditioning apparatus which concerns on Embodiment 3 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerant circuit structure of the refrigeration air conditioning apparatus which concerns on Embodiment 4 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a refrigerant circuit diagram illustrating an example of a refrigerant circuit configuration of the refrigerating and air-conditioning apparatus 100 according to Embodiment 1 of the present invention. Based on FIG. 1, the refrigerant circuit configuration and operation of a refrigerating and air-conditioning apparatus 100 of a type that recovers heat by simultaneous cooling and heating operation will be described. This refrigeration air conditioner 100 is installed in a building, condominium, hotel or the like, and can supply an air conditioning load and a refrigeration / refrigeration load at the same time by using a refrigeration cycle for circulating a refrigerant. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Moreover, in FIG. 1, the flow of the refrigerant | coolant at the time of the heating main operation | movement which the refrigeration air conditioning apparatus 100 performs is shown.

  The refrigerating and air-conditioning apparatus 100 according to Embodiment 1 includes at least an air-conditioning refrigeration cycle 1 and a refrigeration / refrigeration refrigeration cycle 2. The air-conditioning refrigeration cycle 1 and the refrigeration / refrigeration refrigeration cycle 2 are configured to perform heat exchange in the refrigerant-refrigerant heat exchanger 131 without mixing the refrigerants. In addition, the refrigerant | coolant which circulates through the refrigerating cycle 1 for air-conditioning is called a primary side refrigerant | coolant, and the refrigerant | coolant which circulates through the refrigerating cycle 2 for refrigeration / refrigeration is called a secondary side refrigerant | coolant, respectively. Note that the notation of refrigeration / freezing refers to refrigeration and / or freezing.

[Refrigeration cycle 1 for air conditioning]
The refrigeration cycle 1 for air conditioning includes a heat source unit A, an indoor unit B in charge of a cooling load (hereinafter referred to as a cooling indoor unit B), and an indoor unit C in charge of a heating load (hereinafter referred to as a heating indoor unit C). And a refrigeration / refrigeration booster unit D (specifically, the primary side of the refrigerant-refrigerant heat exchanger 131) and a relay E, which are heat sources for the refrigeration / refrigeration refrigeration cycle 2. The indoor unit B will be described as a cooling indoor unit, and the indoor unit C will be described as a heating indoor unit. These are examples of the functions of the indoor unit B and the indoor unit C, and the indoor unit B is in charge of the heating load. The indoor unit C may be responsible for the cooling load. In addition, when simply referred to as an indoor unit, both the indoor unit B and the indoor unit C are shown.

  As shown in FIG. 1, the air conditioning refrigeration cycle 1 side of the cooling indoor unit B, the heating indoor unit C, and the refrigeration / freezing booster unit D is arranged in parallel to the heat source unit A via the relay unit E. It is connected. This relay unit E is installed between the heat source unit A, the cooling indoor unit B, the heating indoor unit C, and the air conditioning refrigeration cycle 1 side of the refrigeration / freezing booster unit D, and switches the flow of the primary refrigerant. Thus, the functions as the cooling indoor unit B, the heating indoor unit C, and the refrigeration / freezing booster unit D are exhibited. Note that the refrigeration / freezing booster unit D is connected to the primary side of the refrigeration / freezing booster unit D and the refrigeration / refrigeration booster unit 2 is connected to the secondary side of the refrigeration / refrigeration booster unit D. , Respectively.

{Heat source machine A}
The heat source unit A has a function of supplying hot or cold heat to the primary side of the cooling indoor unit B, the heating indoor unit C, and the refrigeration / freezing booster unit D via the relay unit E. In this heat source machine A, an air conditioning compressor 101, a four-way valve 102 as a flow path switching means, an outdoor heat exchanger (heat source side heat exchanger) 103, and an accumulator 104 are connected in series by piping. It is installed. The heat source unit A may be provided with a blower such as a fan for supplying air to the outdoor heat exchanger 103 in the vicinity of the outdoor heat exchanger 103.

  The air-conditioning compressor 101 sucks the primary side refrigerant and compresses the primary side refrigerant to bring it into a high temperature / high pressure state. The four-way valve 102 switches the flow of the primary side refrigerant. The outdoor heat exchanger 103 functions as an evaporator or a radiator (condenser), performs heat exchange between air supplied from a blower (not shown) and the primary refrigerant, and converts the primary refrigerant into evaporated gas or Condensed liquid. The accumulator 104 is disposed on the suction side of the air-conditioning compressor 101 and stores excess primary refrigerant. In addition, the accumulator 104 should just be a container which can store an excess primary side refrigerant | coolant.

  In addition, in the heat source unit A, the flow of the primary side refrigerant is allowed to flow only in a predetermined direction (direction from the heat source unit A to the relay unit E) in the high-pressure side connection pipe 106 between the outdoor heat exchanger 103 and the relay unit E. The permissible check valve 105a permits the flow of the primary side refrigerant only in a predetermined direction (direction from the relay E to the heat source unit A) to the low-pressure side connection pipe 107 between the four-way valve 102 and the relay E. A check valve 105b is provided.

  The high-pressure side connection pipe 106 and the low-pressure side connection pipe 107 are a first connection pipe 10 that connects the downstream side of the check valve 105a and the downstream side of the check valve 105b, and the upstream side of the check valve 105a and the check valve. The second connection pipe 11 connecting the upstream side of 105b is connected. The first connection pipe 10 is provided with a check valve 105 c that allows the flow of the primary-side refrigerant only in the direction from the low-pressure side connection pipe 107 to the high-pressure side connection pipe 106. The second connection pipe 11 is also provided with a check valve 105 d that allows the flow of the primary-side refrigerant only in the direction from the low-pressure side connection pipe 107 to the high-pressure side connection pipe 106.

[Indoor unit]
The indoor unit has a function of receiving cooling or heating supply from the heat source unit A and taking charge of cooling load or heating load. In the indoor unit, an air conditioning throttle means 117 and an indoor heat exchanger (use side heat exchanger) 118 are mounted connected in series. FIG. 1 shows an example in which two cooling indoor units B and two heating indoor units C are connected. The indoor unit may be provided with a blower such as a fan for supplying air to the indoor heat exchanger 118 in the vicinity of the indoor heat exchanger 118. For convenience, the pipe connected from the relay E to the indoor heat exchanger 118 is referred to as a connection pipe 12 and the pipe connected from the relay E to the air conditioning throttle means 117 is referred to as a connection pipe 13.

  The air conditioning throttle means 117 has a function as a pressure reducing valve or an expansion valve, and expands the primary side refrigerant by reducing the pressure. The air-conditioning throttle means 117 may be constituted by a controllable opening degree, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like. The indoor heat exchanger 118 functions as a radiator (condenser) or an evaporator, performs heat exchange between air supplied from a blower (not shown) and the primary refrigerant, and condensates or evaporates the primary refrigerant. It is gasified.

{Refrigerator / Freezer Booster Unit D}
The refrigeration / freezing booster unit D has a function of transmitting cold heat from the heat source unit A to the refrigeration / freezing refrigeration cycle 2 via the refrigerant-refrigerant heat exchanger 131. On the primary side of the refrigeration / freezing booster unit D, a throttle means 119 and a refrigerant-refrigerant heat exchanger 131 are connected in series. The air-conditioning refrigeration cycle 1 and the refrigeration / refrigeration refrigeration cycle 2 are cascade-connected by a refrigerant-refrigerant heat exchanger 131. That is, the refrigerant-refrigerant heat exchanger 131 performs heat exchange between the primary side refrigerant and the secondary side refrigerant.

  Similar to the air conditioning throttle means 117, the throttle means 119 has a function as a pressure reducing valve or an expansion valve, and decompresses the primary side refrigerant to expand it. The throttling means 119 may be constituted by a controllable opening degree, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like. The refrigerant-refrigerant heat exchanger 131 functions as a radiator (condenser) and an evaporator, and a secondary-side refrigerant that circulates through the refrigeration / refrigeration refrigeration cycle 2 and a primary-side refrigerant that circulates through the air-conditioning refrigeration cycle 1. Heat exchange is performed between the two. For convenience, the pipe connected from the relay E to the refrigerant-refrigerant heat exchanger 131 is referred to as a connection pipe 14, and the connection pipe connected from the relay E to the throttle means 119 is referred to as a connection pipe 15.

{Repeater E}
The relay unit E connects the use side unit (the indoor unit B, the indoor unit C, and the refrigeration / refrigeration booster unit D) and the heat source unit A, and connects the valve unit 109a or the valve unit 109b of the first distribution unit 109. It has a function of determining whether the indoor heat exchanger 118 is a radiator or an evaporator or whether the refrigerant-refrigerant heat exchanger 131 is a chiller or a hot water supply by opening or closing one of them. ing. The relay E includes a gas-liquid separator 108, a first distributor 109, a second distributor 110, a first internal heat exchanger 111, a first relay throttle means 112, and a second internal heat. It has at least the exchanger 113 and the second relay throttle unit 114.

  In the first distribution unit 109, the connection pipe 12 and the connection pipe 14 are branched into two, one (the connection pipe 12b and the connection pipe 14b) is connected to the low-pressure side connection pipe 107, and the other (the connection pipe 12a and the connection pipe). The pipe 14a) is connected to a connection pipe (referred to as connection pipe 16) connected to the gas-liquid separator 108. Further, the valve means 109a that is controlled to open / close the connection pipe 12a and the connection pipe 14a so as not to conduct the refrigerant, or the valve means 109a that is controlled to open / close the connection pipe 12b and the connection pipe 14b does not conduct the refrigerant. Valve means 109b are provided respectively.

  In the second distribution unit 110, the connection pipe 13 and the connection pipe 15 are branched into two, one (the connection pipe 13a and the connection pipe 15a) is connected at the first meeting part 115, and the other (the connection pipe 13b and the connection pipe). A pipe 15 b) is connected at the second meeting part 116. In the second distribution unit 110, the check valve 110a that allows only one of the refrigerant to flow in the connecting pipe 13a and the connecting pipe 15a is reverse to allow only one of the refrigerant to flow in the connecting pipe 13b and the connecting pipe 15b. A stop valve 110b is provided. Note that valve means such as an electromagnetic valve may be used instead of the check valve 110a and the check valve 110b. If it does so, in the 2nd distribution part 110, switching of a flow path can be performed reliably.

  The first meeting unit 115 is connected from the second distribution unit 110 to the gas-liquid separator 108 via the first relay squeezing means 112 and the first internal heat exchanger 111. The second meeting unit 116 branches between the second distribution unit 110 and the second internal heat exchanger 113, one of which is for the second distribution unit 110 and the first relay device via the second internal heat exchanger 113. The second meeting section 116a is connected to the first meeting section 115 between the throttling means 112, and the other (second meeting section 116a) is connected to the second relay throttling means 114, the second internal heat exchanger 113, and the first internal heat exchanger 111. To the low-pressure side connection pipe 107.

  The gas-liquid separator 108 separates the refrigerant into a gas refrigerant and a liquid refrigerant, and is provided in the high-pressure side connection pipe 106, one of which is connected to the valve means 109a of the first distributor 109, and the other is the first. It is connected to the second distribution unit 110 via the meeting unit 115. The first distribution unit 109 has a function of causing the refrigerant to flow into and out of the indoor heat exchanger 118 and the refrigerant-refrigerant heat exchanger 131 by selectively opening or closing either the valve means 109a or the valve means 109b. ing. The 2nd distribution part 110 has a function which permits the flow of a refrigerant to either one by check valve 110a and check valve 110b.

  The first internal heat exchanger 111 is provided in the first meeting section 115 between the gas-liquid separator 108 and the first relay throttle means 112, and is connected to the refrigerant conducting the first meeting section 115. The heat exchange is performed between the second meeting portion 116a branched from the second meeting portion 116a and the refrigerant conducting. The first repeater throttle means 112 is provided in the first meeting part 115 between the first internal heat exchanger 111 and the second distribution part 110, and expands the refrigerant by decompressing it. The first repeater throttle means 112 may be configured with a variable opening degree controllable means, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like.

  The second internal heat exchanger 113 is provided in the second meeting part 116, and conducts the refrigerant that is conducted through the second meeting part 116 and the second meeting part 116a from which the second meeting part 116 is branched. The heat exchange is performed between the refrigerant and the refrigerant. The second relay throttling means 114 is provided in the second meeting part 116 between the second internal heat exchanger 113 and the second distribution part 110, functions as a pressure reducing valve or an expansion valve, and decompresses the refrigerant. And expand. As with the first relay unit throttle unit 112, the second relay unit throttle unit 114 can be controlled to have a variable opening, for example, a precise flow rate control unit using an electronic expansion valve, or a low cost such as a capillary tube. The refrigerant flow rate adjusting means may be used.

  As described above, the air conditioning refrigeration cycle 1 includes the air conditioning compressor 101, the four-way valve 102, the indoor heat exchanger 118, the air conditioning throttle means 117, the outdoor heat exchanger 103, and the accumulator 104 connected in series. Compressor 101, four-way valve 102, refrigerant-refrigerant heat exchanger 131, throttle means 119, outdoor heat exchanger 103, and accumulator 104 are connected in series. The refrigerant-refrigerant heat exchanger 131 is connected in parallel, and the refrigerant is circulated through them.

  The air conditioning compressor 101 is not particularly limited as long as it can compress the sucked refrigerant into a high pressure state. For example, the air-conditioning compressor 101 can be configured using various types such as reciprocating, rotary, scroll, or screw. The air-conditioning compressor 101 may be configured as a type in which the rotational speed can be variably controlled by an inverter, or may be configured as a type in which the rotational speed is fixed.

Further, the type of the refrigerant circulating through the air-conditioning refrigeration cycle 1 is not particularly limited. For example, natural refrigerants such as carbon dioxide (CO ₂ ), hydrocarbons, and helium, and alternatives that do not contain chlorine such as HFC410A, HFC407C, and HFC404A Either a refrigerant or a fluorocarbon refrigerant such as R22 or R134a used in existing products may be used.

  Here, the flow of the primary-side refrigerant in the air-conditioning refrigeration cycle 1 during the heating-main operation performed by the refrigeration air-conditioning apparatus 100 will be described with reference to FIG. The refrigerating and air-conditioning apparatus 100 has a cooling only operation mode in which all of the indoor units execute a cooling operation, a heating only operation mode in which all of the indoor units perform a heating operation, and a cooling main operation in which cooling and heating are mixed and the cooling load is larger. Mode (see FIG. 2) and a heating main operation mode in which the heating load is larger and the heating / cooling is mixed. Moreover, in FIG. 1, the flow of the refrigerant | coolant is represented by the check valve and the open / close state of the valve means (white (open state) and black (closed state)).

  The primary refrigerant in the gas state heated to high temperature and high pressure by the air conditioning compressor 101 is discharged from the air conditioning compressor 101, passes through the four-way valve 102, passes through the check valve 105 c, and is connected to the high pressure side connecting pipe 106. To the gas-liquid separator 108 of the relay E in the superheated gas state. The primary refrigerant in the superheated gas state flowing into the gas-liquid separator 108 flows through the connection pipe 16 and is distributed to the circuit in which the valve means 109a of the first distribution unit 109 is open, that is, the heating indoor unit C. The primary-side refrigerant that has flowed into the heating indoor unit C dissipates heat in the indoor heat exchanger 118 (that is, warms the room air), is depressurized by the air conditioning throttle means 117, and joins at the first meeting unit 115.

  On the other hand, a part of the primary refrigerant in the superheated gas state that has flowed into the gas-liquid separator 108 is combined with the primary refrigerant that has been expanded to low temperature and low pressure by the second relay expansion means 114 in the first internal heat exchanger 111. The degree of supercooling is obtained by heat exchange. Then, the primary side refrigerant (primary side refrigerant that flows into the heating indoor unit C and dissipates heat in the indoor heat exchanger 118) that has passed through the first repeater throttle means 112 and is used for air conditioning and the first meeting unit Join at 115. It should be noted that some of the primary refrigerant in the superheated gas state passing through the first repeater throttle means 112 may be eliminated by fully closing the first repeater throttle means 112.

  Thereafter, the joined primary side refrigerant exchanges heat with the primary side refrigerant expanded to low temperature and low pressure in the second relay heat exchanger 113 in the second internal heat exchanger 113 to obtain a degree of supercooling. And this primary side refrigerant | coolant is distributed to the 2nd meeting part 116 side and the throttle means 114 side for the 2nd repeater.

  The primary refrigerant conducted through the second meeting portion 116 is distributed to a circuit in which the valve means 109b is open, that is, the primary side of the cooling indoor unit B and the refrigeration / freezing booster unit D. The primary-side refrigerant that has flowed into the cooling indoor unit B is expanded to low temperature and low pressure by the air conditioning throttle means 117, evaporates in the indoor heat exchanger 118, and flows into the low-pressure side connection pipe 107 through the valve means 109b. The primary refrigerant that has flowed into the primary side of the refrigeration / freezing booster unit D is expanded to a low temperature / low pressure by the throttle means 119, evaporates in the refrigerant-refrigerant heat exchanger 131, passes through the valve means 109b, and is connected to the low pressure side connection pipe. It flows into 107.

  Further, the primary refrigerant that has been conducted through the second repeater throttle means 114 evaporates by exchanging heat in the second internal heat exchanger 113 and the first internal heat exchanger 111, and in the cooling chamber through the low-pressure side connection pipe 107. The primary side refrigerant that has flowed out of the primary side of the machine B and the refrigeration / freezing booster unit D merges. And the primary side refrigerant | coolant merged by the low voltage | pressure side connection piping 107 is led to the outdoor heat exchanger 103 through the non-return valve 105d, and depending on an operating condition, the remaining liquid refrigerant is evaporated, and the four-way valve 102, the accumulator Return to the air-conditioning compressor 101 via the radiator 104.

[Refrigeration cycle 2 for refrigeration / freezing]
The refrigeration / refrigeration refrigeration cycle 2 includes a refrigeration / refrigeration booster unit D (specifically, a secondary side of the refrigerant-refrigerant heat exchanger 131) and a refrigeration / refrigeration unit F. That is, the refrigeration / refrigeration refrigeration cycle 2 includes a refrigeration compressor 130, a refrigerant-refrigerant heat exchanger 131, a refrigeration throttle means 132, and a refrigeration / refrigeration unit mounted in the refrigeration / refrigeration booster unit D. The refrigeration heat exchanger 133 mounted on F is connected by piping in series. The refrigeration / refrigeration refrigeration cycle 2 is connected to the air-conditioning refrigeration cycle 1 by a refrigerant-refrigerant heat exchanger 131 mounted on the refrigeration / refrigeration booster unit D.

{Refrigerator / Freezer Booster Unit D}
As described above, the refrigeration / freezing booster unit D has a function of transmitting the heat or cold from the heat source unit A to the refrigeration / freezing refrigeration cycle 2 via the refrigerant-refrigerant heat exchanger 131. On the secondary side of the refrigeration / freezing booster unit D, a refrigeration compressor 130, a secondary side of the refrigerant-refrigerant heat exchanger 131, and a refrigeration throttle means 132 are connected in series.

  The refrigeration compressor 130 sucks the secondary side refrigerant and compresses the secondary side refrigerant to a high temperature and high pressure state. The refrigeration compressor 130 may be configured as a type in which the rotational speed can be variably controlled by an inverter, or may be configured as a type in which the rotational speed is fixed. The refrigeration compressor 130 is not particularly limited as long as it can compress the sucked secondary refrigerant into a high pressure state. For example, the refrigeration compressor 130 can be configured using various types such as reciprocating, rotary, scroll, or screw.

  As described above, the refrigerant-refrigerant heat exchanger 131 performs heat exchange between the primary side refrigerant circulating in the air-conditioning refrigeration cycle 1 and the secondary side refrigerant circulating in the refrigeration / refrigeration cycle 2. Is. The freezing throttling means 132 has a function as a pressure reducing valve or an expansion valve, and expands the secondary side refrigerant by reducing the pressure. The refrigeration throttle means 132 may be configured by a controllable opening degree, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary.

  In addition, the kind of secondary side refrigerant | coolant which circulates through the refrigerating cycle 2 for refrigeration / freezing is not specifically limited, For example, natural refrigerants, such as a carbon dioxide, a hydrocarbon, and helium, chlorine, such as HFC410A, HFC407C, and HFC404A, is not included Either an alternative refrigerant or a fluorocarbon refrigerant such as R22 or R134a used in existing products may be used.

{Refrigerated / Frozen Unit F}
The refrigeration / freezing unit F has a function of receiving cold heat from the refrigeration / freezing booster unit D and taking charge of the refrigeration / freezing load. The refrigeration / freezing unit F is equipped with a refrigeration heat exchanger 133. The refrigeration heat exchanger 133 is provided between the refrigeration throttle means 132 and the refrigeration compressor 130 of the refrigeration / refrigeration booster unit D, functions as an evaporator, and is supplied from a blower (not shown). Heat exchange between the secondary refrigerant and the secondary refrigerant to evaporate the secondary refrigerant. The refrigeration / freezing unit F may be provided with a blower such as a fan for supplying air to the refrigeration heat exchanger 133 in the vicinity of the refrigeration heat exchanger 133.

Here, the flow of the primary refrigerant in the refrigeration / freezing refrigeration cycle 2 will be described.
First, the hot water supply refrigerant that has been heated to a high temperature and high pressure by the refrigeration compressor 130 is discharged from the refrigeration compressor 130 and flows into the refrigerant-refrigerant heat exchanger 131. In the refrigerant-refrigerant heat exchanger 131, the inflowing secondary refrigerant is cooled and condensed by the primary side circulating in the air conditioning refrigeration cycle 1. This secondary refrigerant is expanded by the freezing throttle means 132. The expanded secondary refrigerant flows out of the refrigeration / freezing booster unit D and flows into the refrigeration / freezing unit F.

  The secondary refrigerant that has flowed into the refrigeration / freezing unit F receives heat from the air supplied from a blower (not shown) in the refrigeration heat exchanger 133 and evaporates, and flows out from the refrigeration / refrigeration unit F. The secondary refrigerant flowing out of the refrigeration / freezing unit F flows into the secondary side of the refrigeration / freezing booster unit D and returns to the refrigeration compressor 130.

  Although not shown, the refrigerating and air-conditioning apparatus 100 includes a sensor that detects the discharge pressure and suction pressure of the primary refrigerant, a sensor that detects the discharge temperature and suction temperature of the primary refrigerant, and the outdoor heat exchanger 103. A sensor for detecting the temperature of the primary side refrigerant flowing in and out, a sensor for detecting the outside air temperature taken into the heat source unit A, a sensor for detecting the temperature of the primary side refrigerant flowing into and out of the indoor heat exchanger 118, Sensor for detecting discharge pressure and suction pressure, sensor for detecting discharge temperature and suction temperature of secondary refrigerant, sensor for detecting temperature of secondary refrigerant flowing into and out of refrigeration heat exchanger 133, refrigeration / refrigeration unit F It is preferable to provide a sensor for detecting the outside air temperature taken in, a sensor for detecting the temperature of the primary refrigerant and the secondary refrigerant flowing in and out of the refrigerant-refrigerant heat exchanger 131, and the like.

  Information (temperature information, pressure information, etc.) detected by these various sensors is sent to a control means (not shown) that controls the operation of the refrigerating and air-conditioning apparatus 100, and the drive frequency of the air-conditioning compressor 101 and the four-way valve 102. Switching, opening / closing of the valve means 109a and valve means 109b, the driving frequency of the refrigeration compressor 130, the opening degree of each expansion device, and the like.

  The air-conditioning refrigeration cycle 1 and the refrigeration / refrigeration refrigeration cycle 2 have independent refrigerant circuit configurations (the air-conditioning refrigeration cycle 1 and the refrigeration / refrigeration refrigeration cycle 2), as described above. The refrigerant circulating through each refrigerant circuit may be of the same type or different types. That is, the refrigerant in each refrigerant circuit flows so as to exchange heat with each other in the refrigerant-refrigerant heat exchanger 131 without being mixed.

  Moreover, although the case where the excess refrigerant | coolant was stored by the liquid receiver (accumulator 104) in the refrigerating cycle 1 for an air conditioning was shown, it is not restricted to this, It is stored with the heat exchanger used as a heat radiator in a refrigerating cycle. In this case, the accumulator 104 may be removed. Further, FIG. 1 shows an example in which two cooling indoor units B and two heating indoor units C are connected, but one or more cooling indoor units B and zero or one heating indoor unit C are used. More than one unit may be connected.

  Further, FIG. 1 shows an example in which one refrigeration / freezing booster unit D and one refrigeration / freezing unit F are connected, but the number of connected units is not limited. For example, two or more refrigeration / freezing booster units D may be connected, or two or more refrigeration / freezing units F may be connected. And the capacity | capacitance of each installed indoor unit and the booster unit D for refrigeration and freezing may be made the same, and may differ from large to small.

  As described above, in the refrigerating and air-conditioning apparatus 100 according to Embodiment 1, since the refrigeration or refrigeration load system is configured in a two-way cycle, when providing low-temperature refrigeration demand (for example, −20 ° C.), The temperature of the evaporator (refrigeration heat exchanger 133) of the refrigeration / freezing refrigeration cycle 2 may be set to a low temperature (for example, the evaporation temperature −25 ° C.). Therefore, energy saving can be realized while maintaining the comfort of the room on the air conditioning load side. For example, when there is a demand for low-temperature hot water supply during air-conditioning cooling operation in winter, the refrigeration air-conditioning apparatus 100 recycles the exhaust heat collected in the refrigeration / freezing refrigeration cycle 2 to perform heating air-conditioning. Is greatly improved and energy saving.

  FIG. 2 is a refrigerant circuit diagram illustrating a refrigerant flow during the cooling main operation of the refrigerating and air-conditioning apparatus 100 according to Embodiment 1 of the present invention. Based on FIG. 2, the cooling main operation | movement of the refrigerating cycle 1 for an air conditioning which the refrigeration air conditioning apparatus 100 performs is demonstrated. In FIG. 2, the refrigerant flow is represented by open / close states of the check valve and valve means (white (open state) and black (closed state)).

  The primary refrigerant in the gas state that has been heated to a high temperature and high pressure by the air conditioning compressor 101 is discharged from the air conditioning compressor 101 and flows into the outdoor heat exchanger 103 via the four-way valve 102. The primary refrigerant flowing into the outdoor heat exchanger 103 dissipates heat to the air supplied to the outdoor heat exchanger 103 and is cooled to about the ambient air temperature. The primary refrigerant flows out of the outdoor heat exchanger 103, is conducted through the check valve 105a, is led to the high-pressure side connecting pipe 106, and flows into the gas-liquid separator 108 of the relay E.

  The primary refrigerant flowing into the gas-liquid separator 108 flows out of the gas-liquid separator 108 and flows into the first internal heat exchanger 111. The primary-side refrigerant that has flowed into the first internal heat exchanger 111 performs heat exchange with the primary-side refrigerant expanded to a low temperature and low pressure in the second relay throttle unit 114 to obtain a degree of supercooling. Then, it passes through the first relay stop means 112 and merges with the primary side refrigerant used for air conditioning at the first meeting part 115. The merged primary side refrigerant is then subjected to heat exchange with the second side internal heat exchanger 113 and the primary side refrigerant expanded to low temperature and low pressure at the second relay throttle unit 114, thereby further reducing the degree of supercooling. Get. And it distributes to the primary side refrigerant | coolant which flows through the 2nd meeting part 116, and the primary side refrigerant | coolant which flows through the throttle means 114 for 2nd relay machines.

  Further, the primary refrigerant passing through the second meeting portion 116 is distributed to the circuit in which the valve means 109b is open, that is, the cooling indoor unit B and the primary side of the refrigeration / freezing booster unit D. The primary-side refrigerant that has flowed into the cooling indoor unit B is expanded to low temperature and low pressure by the air conditioning throttle means 117, evaporates in the indoor heat exchanger 118, and flows into the low-pressure side connection pipe 107 through the valve means 109b. The primary refrigerant that has flowed into the primary side of the refrigeration / freezing booster unit D is expanded to a low temperature / low pressure by the throttle means 119, evaporates in the refrigerant-refrigerant heat exchanger 131, passes through the valve means 109b, and is connected to the low pressure side connection pipe. It flows into 107.

  Further, the primary refrigerant that has been conducted through the second repeater throttle means 114 evaporates by exchanging heat with the second internal heat exchanger 113 and the first internal heat exchanger 111, and is cooled with the low-pressure side connection pipe 107. The primary side refrigerant that has flowed out of the primary side of the machine B and the refrigeration / freezing booster unit D merges.

On the other hand, the primary refrigerant in the gas state separated by the gas-liquid separator 108 is distributed to the heating indoor unit C side through the valve means 109a. The primary refrigerant flowing into the heating indoor unit C dissipates heat in the indoor heat exchanger 118, is depressurized by the air conditioning throttle means 117, and merges in the first meeting unit 115.
Finally, the primary refrigerant that has joined in the low-pressure side connection pipe 107 returns to the air-conditioning compressor 101 via the check valve 105b, the four-way valve 102, and the accumulator 104. Note that the flow of the secondary refrigerant circulating in the refrigeration / refrigeration refrigeration cycle 2 is the same as in the heating-main operation.

  Therefore, according to the refrigerating and air-conditioning apparatus 100, the optimum load-side unit can be selected depending on the loads of air-conditioning, refrigeration, and refrigeration, and there is no need to separately install new piping from the heat source unit A to each load-side unit. Since only the load side unit needs to be connected by piping from E, the amount of piping used can be reduced. Moreover, according to the refrigerating and air-conditioning apparatus 100, by using a combined air conditioning system capable of performing a cooling load and a heating load at the same time, a refrigerating / refrigeration load can be provided simultaneously with the air conditioning load using a two-way refrigeration cycle. . Therefore, according to the refrigeration air conditioner 100, a stable heat source can be supplied throughout the year. Furthermore, according to the refrigerating and air-conditioning apparatus 100, heat can be recovered by the load side unit throughout the year, so that energy saving operation can be realized.

Embodiment 2. FIG.
FIG. 3 is a refrigerant circuit diagram illustrating an example of a refrigerant circuit configuration of the refrigerating and air-conditioning apparatus 100a according to Embodiment 2 of the present invention. Based on FIG. 3, a refrigerant circuit configuration of a type of refrigerating and air-conditioning apparatus 100a that recovers heat by simultaneous cooling and heating operation will be described. This refrigeration air conditioner 100a is installed in a building, condominium, hotel, etc., similarly to the refrigeration air conditioner 100 according to the first embodiment. By using a refrigeration cycle that circulates refrigerant, the air conditioning load and the refrigeration / refrigeration load are simultaneously applied. It can be supplied. In the second embodiment, differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  In the first embodiment, a configuration in which the refrigeration / freezing booster unit D and the refrigeration / freezing unit F are separated from each other and connected by piping is shown as an example. In the second embodiment, the refrigeration / freezing unit F is used. A configuration in which the booster unit and the refrigeration / freezing unit are the same casing (unit G shown in FIG. 3) is shown as an example. By making the refrigeration / refrigeration booster unit and the refrigeration / refrigeration unit the same unit G, the piping can be further saved, and the total unit installation area and manufacturing cost can be reduced.

Embodiment 3 FIG.
FIG. 4 is a refrigerant circuit diagram illustrating an example of a refrigerant circuit configuration of the refrigerating and air-conditioning apparatus 100b according to Embodiment 3 of the present invention. Based on FIG. 4, the refrigerant circuit configuration and operation of a refrigerating and air-conditioning apparatus 100b of a type that recovers heat by simultaneous cooling and heating operation will be described. This refrigeration air conditioner 100b is installed in a building, condominium, hotel, etc., similar to the refrigeration air conditioner 100 according to the first embodiment, and uses a refrigeration cycle that circulates the refrigerant to thereby provide air conditioning load, hot water supply load, and refrigeration / refrigeration. The load can be supplied simultaneously. In the third embodiment, differences from the first and second embodiments will be mainly described, and the same parts as those in the first and second embodiments will be denoted by the same reference numerals and the description thereof will be omitted. It shall be.

  The refrigeration air conditioner 100b according to Embodiment 3 has a configuration in which a hot water supply system is added to the refrigeration air conditioner according to Embodiment 1 or Embodiment 2. That is, the refrigerating and air-conditioning apparatus 100b includes not only the air conditioning refrigeration cycle 1 and the refrigeration / refrigeration refrigeration cycle 2, but also the hot water supply refrigeration cycle 3 and the hot water supply load side cycle 4. The refrigeration cycle 1 for air conditioning and the refrigeration cycle 3 for hot water supply are configured to perform heat exchange in the refrigerant-refrigerant heat exchanger 141 without mixing the refrigerants. The hot water supply refrigeration cycle 3 and the hot water supply load side cycle 4 are configured to perform heat exchange in the heat medium-refrigerant heat exchanger 143 without mixing the refrigerant and the heat medium (for example, water or antifreeze liquid). ing. The refrigerant circulating in the hot water supply refrigeration cycle 3 is referred to as hot water supply refrigerant.

[Refrigeration cycle 3 for hot water supply]
The hot water supply refrigeration cycle 3 includes a hot water supply compressor 140 mounted on the hot water supply booster unit H, a hot water supply refrigerant side of the heat medium-refrigerant heat exchanger 143, a hot water supply throttle means 142, and refrigerant-refrigerant heat. The hot water supply refrigerant side of the exchanger 141 is connected by piping in series. The hot water supply refrigeration cycle 3 has a function of supplying the hot heat from the heat source unit A to the hot water supply unit I via the refrigerant-refrigerant heat exchanger 141. The hot water supply booster unit H is connected and mounted in parallel to the heat source device A in the same manner as the indoor unit and the refrigeration / freezing booster unit D. Therefore, the flow of the primary-side refrigerant is switched by the relay machine E, and the function as the hot water supply booster unit H is exhibited.

[Hot water supply load cycle 4]
In the hot water supply load side cycle 4, the water circulation pump 144 mounted in the hot water supply unit I, the heat medium side of the heat medium-refrigerant heat exchanger 143, and the hot water storage tank 145 are connected in series by piping. It is configured. The hot water supply load side cycle 4 has a function of boiling water stored in the hot water storage tank 145 into hot water with the heat transmitted via the heat medium-refrigerant heat exchanger 143 of the hot water supply booster unit H.

{Booster unit H for hot water supply}
The hot water supply booster unit H has a function of transmitting the heat from the heat source device A to the hot water supply refrigeration cycle 3 via the refrigerant-refrigerant heat exchanger 141. On the primary side of the hot water supply booster unit H, a throttle means 120 and a refrigerant-refrigerant heat exchanger 141 are connected in series. Further, on the secondary side (hot water supply side) of the hot water supply booster unit H, the hot water supply compressor 140, the hot water supply refrigerant side of the heat medium-refrigerant heat exchanger 143, the hot water supply throttle means 142, and the refrigerant-refrigerant. The hot water supply refrigerant side of the heat exchanger 141 is connected in series. The refrigeration cycle 1 for air conditioning and the refrigeration cycle 3 for hot water supply are cascade-connected by a refrigerant-refrigerant heat exchanger 141. That is, the refrigerant-refrigerant heat exchanger 141 performs heat exchange between the primary side refrigerant and the hot water supply refrigerant.

  Similar to the air conditioning throttle means 117, the throttle means 120 functions as a pressure reducing valve and an expansion valve, and expands the primary refrigerant by reducing the pressure. The throttling means 120 may be configured with a variable opening degree controllable means, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like. The refrigerant-refrigerant heat exchanger 141 functions as a radiator (condenser) or an evaporator, and is provided between a hot water supply refrigerant that circulates in the hot water supply refrigeration cycle 3 and a primary refrigerant that circulates in the air conditioning refrigeration cycle 1. Heat exchange. For convenience, the pipe connecting the relay E to the refrigerant-refrigerant heat exchanger 141 is referred to as a connection pipe 14a, and the connection pipe connecting the relay E to the throttle means 120 is referred to as a connection pipe 15a.

  The hot water supply compressor 140 sucks in the hot water supply refrigerant and compresses the hot water supply refrigerant into a high temperature and high pressure state. The hot water supply compressor 140 may be configured as a type in which the rotational speed can be variably controlled by an inverter, or may be configured as a type in which the rotational speed is fixed. The hot water supply compressor 140 is not particularly limited as long as it can compress the sucked refrigerant into a high pressure state. For example, the hot water supply compressor 140 can be configured using various types such as reciprocating, rotary, scroll, or screw.

  The heat medium-refrigerant heat exchanger 143 performs heat exchange between the hot water supply refrigerant circulating in the hot water supply refrigeration cycle 3 and the heat medium circulating in the hot water supply load side cycle. That is, the hot water supply refrigeration cycle 3 and the hot water supply load side cycle are cascade-connected via the heat medium-refrigerant heat exchanger 143. The hot water supply throttling means 142 functions as a pressure reducing valve or an expansion valve, and decompresses and expands the hot water supply refrigerant. The hot water supply throttling means 142 may be configured by a controllable opening degree such as a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like.

  The type of refrigerant circulating in the hot water supply refrigeration cycle 3 is not particularly limited. For example, natural refrigerants such as carbon dioxide, hydrocarbons and helium, alternative refrigerants not containing chlorine such as HFC410A, HFC407C, and HFC404A, or existing Any of chlorofluorocarbon refrigerants such as R22 and R134a used in this product may be used.

{Hot water supply unit I}
In the hot water supply unit I, water is heated to hot water by the hot heat supplied from the hot water supply booster unit H. In the hot water supply unit I, a water circulation pump 144, a heat medium side of the heat medium-refrigerant heat exchanger 143, and a hot water storage tank 145 are connected in series. That is, the hot water supply unit I is formed by connecting the water circulation pump 144, the heat medium-refrigerant heat exchanger 143, and the hot water storage tank 145 to constitute the hot water supply load side cycle 4, and circulating the heat medium therethrough. doing. In addition, the piping of the hot water supply load side cycle 4 is constituted by, for example, a copper tube, a stainless tube, a steel tube, a vinyl chloride piping, or the like.

  The water circulation pump 144 sucks the water stored in the hot water storage tank 145, pressurizes the water, and circulates it in the hot water supply load side cycle 4. For example, the rotation speed is controlled by an inverter. It is good to comprise. As described above, the heat medium-refrigerant heat exchanger 143 performs heat exchange between the heat medium circulating in the hot water supply load side cycle 4 and the hot water supply refrigerant circulating in the hot water supply refrigeration cycle 3. . The hot water storage tank 145 stores water heated by the heat medium-refrigerant heat exchanger 143.

  In general, there is a demand for hot water supply load even in summer, and there is a demand for refrigeration / freezing load in winter. For this reason, in the refrigerating and air-conditioning apparatus 100b, the hot water supply booster unit H and the refrigeration / refrigeration booster unit D are incorporated in the same system, so that the cooling load (cooling load, refrigeration / refrigeration load) and heating load ( The heating load and the hot water supply load) are increased at the same time, and the energy saving effect by heat recovery is expected to increase.

  Here, the flow of the hot water supply refrigerant in the hot water supply refrigeration cycle 3 will be described. The operations of the heat source unit A, the indoor unit, the refrigeration / refrigeration unit F, the relay unit E, and the flow of the primary refrigerant in the refrigeration air conditioner 100b are the same as those in the first and second embodiments. The flow of the primary refrigerant flowing from the relay E to the hot water supply booster unit H is the same as the flow of the primary refrigerant flowing from the relay E to the heating indoor unit C, and the high-temperature refrigerant gas passes through the valve means 109a. Conduction is conducted, heat is radiated by the refrigerant-refrigerant heat exchanger 141, passes through the throttle means 119, and merges at the first meeting part 115.

  In the hot water supply booster unit H, the hot water supply refrigerant heated to a high temperature and high pressure by the hot water supply compressor 140 is discharged from the hot water supply compressor 140 and flows into the heat medium-refrigerant heat exchanger 143. In the heat medium-refrigerant heat exchanger 143, the flowing hot water supply refrigerant dissipates heat by heating the heat medium circulating in the hot water supply load side cycle 4. The hot water supply refrigerant is expanded by the hot water supply throttle means 142. The expanded hot water supply refrigerant receives the air-conditioning refrigeration cycle 1 from the primary refrigerant in the refrigerant-refrigerant heat exchanger 141, evaporates, and returns to the hot water supply compressor 140.

  In addition, the kind of secondary side refrigerant | coolant which circulates through the refrigerating cycle 3 for hot water supply is not specifically limited, For example, natural refrigerants, such as a carbon dioxide, a hydrocarbon, and helium, alternative refrigerant | coolants which do not contain chlorine, such as HFC410A, HFC407C, and HFC404A Alternatively, any of CFC-based refrigerants such as R22 and R134a used in existing products may be used. In addition, since the air-conditioning refrigeration cycle 1 and the hot water supply refrigeration cycle 3 have independent refrigerant circuit configurations, the refrigerant circulating through each refrigerant circuit may be the same type or different types. It is good. That is, the refrigerant in each refrigerant circuit flows so as to exchange heat with each other in the refrigerant-refrigerant heat exchanger 141 without being mixed.

  As described above, in the refrigerating and air-conditioning apparatus 100b, the hot water supply load system is configured in a two-way cycle. Therefore, when providing hot water supply demand (for example, 80 ° C.), the radiator of the refrigeration cycle 3 for hot water supply is provided. What is necessary is just to make temperature high (for example, condensing temperature 85 degreeC), and when there is another heating load, since it is not necessary to increase even to the condensing temperature (for example, 50 degreeC) of the heating indoor unit C, it becomes energy saving. . Also, for example, when there was a demand for hot water supply during the air conditioning and cooling operation in summer, it was necessary to provide it with a boiler, etc., but it was necessary to collect hot water that had been discharged into the atmosphere and reuse it. Therefore, the system COP is greatly improved and energy is saved.

Next, the flow of the heat medium (water here) flowing through the hot water supply load side cycle 4 will be described.
The relatively low temperature water stored in the hot water storage tank 145 is drawn out from the bottom of the hot water storage tank 145 and pressurized by the water circulation pump 144. The water pressurized by the water circulation pump 144 flows into the heat medium-refrigerant heat exchanger 143 and receives heat from the hot water supply refrigerant circulating in the hot water supply refrigeration cycle 3 by the heat medium-refrigerant heat exchanger 143. . That is, the water flowing into the heat medium-refrigerant heat exchanger 143 is boiled by the hot water supply refrigerant circulating in the hot water supply refrigeration cycle 3, and the temperature rises. Then, the boiled water returns to a relatively hot upper portion of the hot water storage tank 145 and is stored in the hot water storage tank 145.

  Moreover, although the case where the excess refrigerant | coolant was stored by the liquid receiver (accumulator 104) in the refrigerating cycle 1 for an air conditioning was shown, it is not restricted to this, It is stored with the heat exchanger used as a heat radiator in a refrigerating cycle. In this case, the accumulator 104 may be removed. Further, FIG. 4 shows an example in which two cooling indoor units B and two heating indoor units C are connected, but 0 or 3 or more cooling indoor units B and 0 heating indoor unit C are set. One unit or three or more units may be connected.

  Further, FIG. 4 shows an example in which one hot water supply booster unit H and one hot water supply unit I are connected, but the number of connected units is not limited. For example, two or more hot water supply booster units H may be connected, or two or more hot water supply units I may be connected. Moreover, although the state in which one refrigeration / freezing booster unit D and one refrigeration / freezing unit F are connected is shown as an example, the number of connected units is not limited. For example, two or more refrigeration / freezing booster units D may be connected, or two or more refrigeration / freezing units F may be connected. And the capacity | capacitance of each installed indoor unit and each booster unit may be made the same, and may be made to differ from large to small.

Embodiment 4 FIG.
FIG. 5 is a refrigerant circuit diagram illustrating an example of a refrigerant circuit configuration of the refrigerating and air-conditioning apparatus 100c according to Embodiment 4 of the present invention. Based on FIG. 5, the refrigerant circuit configuration and operation of the refrigerating and air-conditioning apparatus 100c will be described. This refrigeration air conditioner 100c is installed in a building, condominium, hotel, etc., similarly to the refrigeration air conditioner 100 according to the first embodiment, and uses a refrigeration cycle that circulates the refrigerant, thereby simultaneously adjusting the cooling load and the refrigeration / refrigeration load. It can be supplied. In the fourth embodiment, differences from the first to third embodiments will be mainly described, and the same parts as those in the first to third embodiments will be denoted by the same reference numerals and the description thereof will be omitted. It shall be.

  In the refrigerating and air-conditioning apparatus according to the first to third embodiments, the system has been described in which the relay device E is interposed between the heat source unit A and each load-side unit and the cooling and heating simultaneous operation is possible. In the refrigerating and air-conditioning apparatus 100c according to No. 4, a cooling only type system as shown in FIG. 5 will be described.

  The refrigerating and air-conditioning apparatus 100c according to Embodiment 4 includes at least an air-conditioning refrigeration cycle 1c and a refrigeration / freezing refrigeration cycle 2c. The air-conditioning refrigeration cycle 1c and the refrigeration / refrigeration refrigeration cycle 2c are configured to perform heat exchange in the refrigerant-refrigerant heat exchanger 131c without mixing the refrigerants. In addition, the refrigerant | coolant which circulates through the refrigerating cycle 1c for an air conditioning is called a primary side refrigerant | coolant, and the refrigerant | coolant which circulates through the refrigerating / refrigeration cycle 2c is respectively called a secondary side refrigerant | coolant.

[Refrigeration cycle 1c for air conditioning]
The air-conditioning refrigeration cycle 1 includes a heat source unit Ac, an indoor unit Bc in charge of a cooling load (hereinafter referred to as a cooling indoor unit Bc), and a refrigeration / freezing booster unit serving as a heat source for the refrigeration / freezing refrigeration cycle 2c. Dc (specifically, the primary side of the refrigerant-refrigerant heat exchanger 131c).

  As shown in FIG. 5, the air conditioning refrigeration cycle 1 side of the cooling indoor unit Bc and the refrigeration / freezing booster unit Dc are connected in parallel to the heat source unit Ac. Note that the refrigeration / freezing booster unit Dc side of the refrigeration / freezing booster unit Dc is the primary side of the refrigeration / freezing booster unit Dc, and the refrigeration / refrigeration booster unit 2c side is the secondary side of the refrigeration / refrigeration booster unit Dc. , Respectively.

{Heat source machine Ac}
The heat source unit Ac has a function of supplying cold heat to the primary side of the cooling indoor unit B and the refrigeration / freezing booster unit Dc. In this heat source unit Ac, an air conditioning compressor 101c, an outdoor heat exchanger (heat source side heat exchanger) 103c, and an accumulator 104c are serially connected by piping. The heat source unit Ac may be provided with a blower such as a fan for supplying air to the outdoor heat exchanger 103 in the vicinity of the outdoor heat exchanger 103.

  The air-conditioning compressor 101c sucks the primary side refrigerant and compresses the primary side refrigerant to bring it into a high temperature / high pressure state. The outdoor heat exchanger 103c functions as a radiator (condenser), performs heat exchange between air supplied from a blower (not shown) and the primary refrigerant, and condenses and liquefies the primary refrigerant. The accumulator 104c is disposed on the suction side of the air-conditioning compressor 101c and stores excess primary refrigerant. In addition, the accumulator 104c should just be a container which can store an excess primary side refrigerant | coolant.

[Cooling indoor unit Bc]
The cooling indoor unit Bc has a function of receiving cooling heat or heat supply from the heat source unit Ac and taking charge of a cooling load. The cooling indoor unit Bc is equipped with an air conditioning throttle means 117c and an indoor heat exchanger (use side heat exchanger) 118c connected in series. FIG. 5 shows an example in which two cooling indoor units B are connected. The cooling indoor unit Bc may be provided with a blower such as a fan for supplying air to the indoor heat exchanger 118c in the vicinity of the indoor heat exchanger 118c.

  The air-conditioning throttle means 117c functions as a pressure reducing valve or an expansion valve, and decompresses the primary side refrigerant to expand it. The air-conditioning throttle means 117c may be constituted by a controllable opening degree, such as a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like. The indoor heat exchanger 118c functions as an evaporator, performs heat exchange between air supplied from a blower (not shown) and the primary side refrigerant, and evaporates the primary side refrigerant.

{Refrigerator / Freezer Booster Unit Dc}
The refrigeration / freezing booster unit Dc has a function of transmitting cold heat from the heat source unit Ac to the refrigeration / freezing refrigeration cycle 2c via the refrigerant-refrigerant heat exchanger 131c. An expansion means 119c and a refrigerant-refrigerant heat exchanger 131c are connected in series to the primary side of the refrigeration / freezing booster unit Dc. The refrigeration cycle 1c for air conditioning and the refrigeration cycle 2c for refrigeration / refrigeration are cascade-connected by a refrigerant-refrigerant heat exchanger 131c. That is, the refrigerant-refrigerant heat exchanger 131c performs heat exchange between the primary side refrigerant and the secondary side refrigerant.

  The throttle means 119c has a function as a pressure reducing valve or an expansion valve like the air conditioning throttle means 117c, and decompresses the primary side refrigerant to expand it. The throttling means 119c may be constituted by a controllable opening degree, for example, a precise flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, or the like. The refrigerant-refrigerant heat exchanger 131c functions as an evaporator, and exchanges heat between the secondary side refrigerant circulating in the refrigeration / refrigeration refrigeration cycle 2c and the primary side refrigerant circulating in the air conditioning refrigeration cycle 1c. To do.

  As described above, in the air conditioning refrigeration cycle 1c, the air conditioning compressor 101c, the outdoor heat exchanger 103c, the air conditioning throttle means 117c, the indoor heat exchanger 118c, and the accumulator 104c are connected in series, and the air conditioning compressor 101c. The outdoor heat exchanger 103c, the throttle means 119c, the refrigerant-refrigerant heat exchanger 131c, and the accumulator 104c are connected in series, and this is established by circulating the refrigerant through them.

  The air-conditioning compressor 101c is not particularly limited as long as it can compress the sucked refrigerant into a high-pressure state. For example, the air-conditioning compressor 101c can be configured using various types such as reciprocating, rotary, scroll, or screw. The air-conditioning compressor 101c may be configured as a type in which the rotational speed can be variably controlled by an inverter, or may be configured as a type in which the rotational speed is fixed.

Further, the type of refrigerant circulating in the air-conditioning refrigeration cycle 1c is not particularly limited. For example, natural refrigerants such as carbon dioxide (CO ₂ ), hydrocarbons, and helium, and alternatives that do not contain chlorine such as HFC410A, HFC407C, and HFC404A Either a refrigerant or a fluorocarbon refrigerant such as R22 or R134a used in existing products may be used.

Here, the flow of the primary-side refrigerant in the air-conditioning refrigeration cycle 1c during operation of the refrigeration air-conditioning apparatus 100c will be described with reference to FIG.
The primary refrigerant in the gas state that has been heated to a high temperature and high pressure by the air conditioning compressor 101c is discharged from the air conditioning compressor 101c and flows into the outdoor heat exchanger 103c. The primary refrigerant in the superheated gas state that has flowed into the outdoor heat exchanger 103c is cooled and liquefied by the air supplied to the outdoor heat exchanger 103c. The primary-side refrigerant flows out of the outdoor heat exchanger 103c, flows through the high-pressure side connection pipe 106c, and is distributed to the primary side of the cooling indoor unit Bc and the refrigeration / freezing booster unit Dc.

  The primary-side refrigerant that has flowed into the cooling indoor unit Bc is expanded to low temperature and low pressure by the air conditioning throttle means 117c, is evaporated by the indoor heat exchanger 118c, and flows into the low-pressure side connection pipe 107c. The primary-side refrigerant that has flowed into the primary side of the refrigeration / freezing booster unit Dc is expanded to low temperature and low pressure by the throttle means 119c, is evaporated by the refrigerant-refrigerant heat exchanger 131c, and flows into the low-pressure side connection pipe 107c. The primary-side refrigerant flowing through the low-pressure side connection pipe 107c then flows into the heat source unit A and returns to the air conditioning compressor 101c via the accumulator 104c.

[Refrigeration cycle 2c for refrigeration / freezing]
The refrigeration / refrigeration refrigeration cycle 2c includes a refrigeration / refrigeration booster unit Dc (specifically, a secondary side of the refrigerant-refrigerant heat exchanger 131) and a refrigeration / refrigeration unit Fc. That is, the refrigeration / refrigeration refrigeration cycle 2c includes a refrigeration compressor 130c mounted on the refrigeration / refrigeration booster unit Dc, a refrigerant-refrigerant heat exchanger 131c, a refrigeration throttle means 132c, and a refrigeration / refrigeration unit. The refrigeration heat exchanger 133c mounted on the Fc is connected by pipe connection in series. The refrigeration / refrigeration refrigeration cycle 2c is connected to the air-conditioning refrigeration cycle 1c by a refrigerant-refrigerant heat exchanger 131c mounted on the refrigeration / refrigeration booster unit Dc.

{Refrigerator / Freezer Booster Unit Dc}
As described above, the refrigeration / freezing booster unit Dc has a function of transmitting cold heat from the heat source unit Ac to the refrigeration / freezing refrigeration cycle 2c via the refrigerant-refrigerant heat exchanger 131c. On the secondary side of the refrigeration / freezing booster unit Dc, a refrigeration compressor 130c, a secondary side of the refrigerant-refrigerant heat exchanger 131c, and a refrigeration throttle means 132c are connected in series.

  The refrigeration compressor 130c sucks the secondary side refrigerant and compresses the secondary side refrigerant to bring it into a high temperature / high pressure state. The refrigeration compressor 130c may be configured as a type in which the rotational speed can be variably controlled by an inverter, or may be configured as a type in which the rotational speed is fixed. The refrigeration compressor 130c is not particularly limited as long as it can compress the sucked secondary refrigerant to a high pressure state. For example, the refrigeration compressor 130c can be configured using various types such as reciprocating, rotary, scroll, or screw.

  As described above, the refrigerant-refrigerant heat exchanger 131c performs heat exchange between the primary refrigerant circulating in the air-conditioning refrigeration cycle 1c and the secondary refrigerant circulating in the refrigeration / refrigeration cycle 2c. Is. The freezing throttling means 132c has a function as a pressure reducing valve or an expansion valve, and expands the secondary side refrigerant by reducing the pressure. The refrigeration throttle means 132c may be constituted by a variable flow rate control means using an electronic expansion valve, an inexpensive refrigerant flow rate control means such as a capillary tube, etc., whose opening degree can be variably controlled.

  The type of the secondary refrigerant that circulates in the refrigeration / freezing refrigeration cycle 2c is not particularly limited. For example, natural refrigerants such as carbon dioxide, hydrocarbons, and helium, and chlorine such as HFC410A, HFC407C, and HFC404A are not included. Either an alternative refrigerant or a fluorocarbon refrigerant such as R22 or R134a used in existing products may be used.

{Refrigerated / Frozen Unit Fc}
The refrigeration / freezing unit Fc has a function of receiving cold heat from the refrigeration / freezing booster unit Dc and taking charge of the refrigeration / freezing load. The refrigeration / freezing unit Fc is equipped with a refrigeration heat exchanger 133c. The refrigeration heat exchanger 133c is provided between the refrigeration throttle means 132c and the refrigeration compressor 130c of the refrigeration / refrigeration booster unit Dc, functions as an evaporator, and is supplied from a blower (not shown). Heat exchange between the secondary refrigerant and the secondary refrigerant to evaporate the secondary refrigerant. In the refrigeration / freezing unit Fc, a fan such as a fan for supplying air to the refrigeration heat exchanger 133c may be provided in the vicinity of the refrigeration heat exchanger 133c.

  The flow of the secondary refrigerant in the refrigeration / freezing booster unit Dc and the refrigeration / freezing unit Fc, that is, the refrigeration / freezing refrigeration cycle 2c, is the same as that for the refrigeration / freezing described in the first to third embodiments. This is the same as the flow of the secondary refrigerant in the booster unit D and the refrigeration / refrigeration unit F, that is, the refrigeration / refrigeration cycle 2.

  The refrigerating and air-conditioning apparatus 100c having such a configuration is assumed to be used in a southern region with a relatively warm climate throughout the year, for example, and is effective when there is a cooling load and no heating load throughout the year. Therefore, according to the refrigerating and air-conditioning apparatus 100c, an optimum load-side unit can be selected depending on each of the air-conditioning load (cooling load) and the refrigeration / refrigeration load. By using the machine A), the installation space can be reduced.

  In addition, although the refrigerating and air-conditioning apparatus according to the present invention has been described separately in the embodiments, the refrigerating and air-conditioning apparatus may be configured by appropriately combining the features of each embodiment. If the embodiments are appropriately combined, the effects of the features of the embodiments can be obtained in a superimposed manner.

  1 Refrigeration cycle for air conditioning, 1c Refrigeration cycle for air conditioning, 2 Refrigeration cycle for refrigeration / refrigeration, 2c Refrigeration cycle for refrigeration / refrigeration, 3 Refrigeration cycle for hot water supply, 4 Hot water supply load side cycle, 10 1st connection piping, 11 2nd connection Piping, 12 connecting piping, 12a connecting piping, 12b connecting piping, 13 connecting piping, 13a connecting piping, 13b connecting piping, 14 connecting piping, 14a connecting piping, 14b connecting piping, 15 connecting piping, 15a connecting piping, 15b connecting piping, 16 connection piping, 100 refrigeration air conditioner, 100a refrigeration air conditioner, 100b refrigeration air conditioner, 100c refrigeration air conditioner, 101 air conditioning compressor, 101c air conditioning compressor, 102 four-way valve, 103 outdoor heat exchanger, 103c outdoor heat exchange 104 accumulator, 104c accumulator, 105a Check valve, 105b Check valve, 105c Check valve, 105d Check valve, 106 High-pressure side connection piping, 106c High-pressure side connection piping, 107 Low-pressure side connection piping, 107c Low-pressure side connection piping, 108 Gas-liquid separator, 109 1st distribution part, 109a valve means, 109b valve means, 110 2nd distribution part, 110a check valve, 110b check valve, 111 1st internal heat exchanger, 112 throttle means for 1st repeater, 113 2nd inside Heat exchanger, 114 Second relay squeezing means, 115 First meeting part, 116 Second meeting part, 116a Second meeting part, 117 Air conditioning throttle means (first throttle means), 117c Air conditioning throttle means (first 1 throttle means), 118 indoor heat exchanger, 118c indoor heat exchanger, 119 throttle means (second throttle means), 119c throttle means (second throttle means), 120 throttle means, 130 refrigeration compressor, 130c refrigeration compressor, 131 refrigerant-refrigerant heat exchanger (first refrigerant-refrigerant heat exchanger), 131c refrigerant-refrigerant heat exchanger (first refrigerant-refrigerant heat exchanger), 132 refrigeration Throttle means (third throttle means), 132c refrigeration throttle means (third throttle means), 133 refrigeration heat exchanger, 133c refrigeration heat exchanger, 140 hot water supply compressor, 141 refrigerant-refrigerant heat exchanger ( (Second refrigerant-refrigerant heat exchanger), 142 hot water supply throttling means (fourth throttling means), 143 heat medium-refrigerant heat exchanger, 144 water circulation pump, 145 hot water storage tank, A heat source machine, Ac heat source machine, B room Machine, Bc indoor unit, C indoor unit, D refrigeration booster unit, E relay machine, F refrigeration unit, Fc refrigeration unit, G unit, H hot water supply booster unit, I hot water supply unit .

In the refrigeration air conditioner according to the present invention, an air conditioning compressor, a heat source side heat exchanger, a first throttle means, and a use side heat exchanger are connected in series, and the air conditioning compressor, the heat source side The primary side of the heat exchanger, the second throttle means, and the first refrigerant-refrigerant heat exchanger are connected in series, and the air-conditioning refrigeration cycle for circulating the primary side refrigerant, the refrigeration compressor, and the first refrigerant-refrigerant The secondary side of the heat exchanger, the third throttling means, and the refrigeration heat exchanger are connected in series, and the refrigeration / freezing refrigeration cycle for circulating the secondary side refrigerant , the air conditioning compressor, and the A heat source side heat exchanger is mounted on a heat source unit, the first throttle unit, and the use side heat exchanger are mounted on an indoor unit, the second throttle unit, the first refrigerant-refrigerant heat exchanger, The refrigeration compressor and the third throttle means are mounted on a refrigeration / refrigeration booster unit. And at least one unit interposed between the air-conditioning refrigeration cycle and the refrigeration / refrigeration cycle, wherein a high-pressure connection pipe flowing from the heat source unit and a low-pressure connection pipe flowing out to the heat source unit are respectively connected. And the heat stored in the primary refrigerant can be used as an air conditioning load via the use-side heat exchanger, while the cold stored in the primary-side refrigerant is used as the first heat. It can be used as a refrigeration / refrigeration load by being transmitted to the secondary refrigerant through a refrigerant-refrigerant heat exchanger.

Claims (6)

The air conditioning compressor, the heat source side heat exchanger, the first throttle means, and the use side heat exchanger are connected in series, and the air conditioning compressor, the heat source side heat exchanger, the second throttle means, And the primary side of the 1st refrigerant-refrigerant heat exchanger is connected in series, and the refrigeration cycle for air conditioning which circulates the primary side refrigerant,
Refrigeration / refrigeration refrigeration cycle in which a refrigeration compressor, a secondary side of the first refrigerant-refrigerant heat exchanger, a third throttle means, and a refrigeration heat exchanger are connected in series to circulate the secondary side refrigerant. And having
While making the hot or cold stored in the primary side refrigerant available as an air conditioning load via the use side heat exchanger,
Refrigeration air conditioning characterized in that it can be used as a refrigeration / refrigeration load by transmitting cold heat stored in the primary refrigerant to the secondary refrigerant via the first refrigerant-refrigerant heat exchanger. apparatus. The air conditioning compressor and the heat source side heat exchanger are mounted on a heat source unit,
The first throttle means and the use side heat exchanger are mounted on an indoor unit,
The second throttle means, the first refrigerant-refrigerant heat exchanger, the refrigeration compressor, the third throttle means, and the refrigeration heat exchanger are different from the heat source unit and the indoor unit. The refrigerating and air-conditioning apparatus according to claim 1, wherein the refrigerating and air-conditioning apparatus is mounted on a unit. The air conditioning compressor and the heat source side heat exchanger are mounted on a heat source unit,
The first throttle means and the use side heat exchanger are mounted on an indoor unit,
The second throttle means, the first refrigerant-refrigerant heat exchanger, the refrigeration compressor, and the third throttle means are mounted in a refrigeration / refrigeration booster unit,
The refrigeration air conditioner according to claim 1, wherein the refrigeration heat exchanger is mounted on a refrigeration unit. It is interposed between the heat source unit, the indoor unit, and the refrigeration / refrigeration booster unit, and heat or cold generated by the heat source unit is used for the indoor unit, and cold heat generated by the heat source unit is used for the refrigeration. The refrigeration air conditioner according to claim 2 or 3, wherein the refrigeration booster unit includes at least one relay device that transmits the refrigeration booster unit. The hot water supply compressor, the hot water supply refrigerant side of the heat medium-refrigerant heat exchanger, the fourth throttling means, and the hot water supply refrigerant side of the second refrigerant-refrigerant heat exchanger are connected in series to circulate the hot water supply refrigerant. Has a refrigeration cycle for
The hot heat stored in the primary refrigerant is transmitted to the hot water supply refrigerant through the second refrigerant-refrigerant heat exchanger so as to be used as a hot water supply load. The refrigerating and air-conditioning apparatus according to any one of the above. The hot water supply compressor, the hot water refrigerant side of the heat medium-refrigerant heat exchanger, the fourth throttle means, and the second refrigerant-refrigerant heat exchanger are mounted in a hot water supply booster unit. The refrigerating and air-conditioning apparatus according to claim 5.

Images