JP2006010101A - Vapor compression type refrigeration machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vapor compression type refrigeration machine having a waste heat recovering operation mode (Rankine cycle), and reducing members for switching refrigerant flow between the waste heat recovering operation mode (Rankine cycle) and an air conditioning operation mode (refrigeration cycle). <P>SOLUTION: A refrigerant three-way valve 15 is mounted to switch a refrigerant passage between a case when a compressor discharge side of an expander integration type compressor 100 and a radiator 11 are connected and a case when an expander discharge side of the expander integration type compressor 100 and the radiator 11 are connected. In the air conditioning operation mode, the refrigerant three-way valve 15 is operated in a state of connecting the compressor discharge-side of the expander integration type compressor 100 and the radiator 11, and the expander integration type compressor 100 is operated as the compressor, and in the waste heat recovering operation mode, the refrigerant three-way valve 15 is operated in a state that the expander discharge side of the expander integration type compressor 100 and the radiator 11 are connected, and a liquid pump 32 is operated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vapor compression refrigerator having a Rankine cycle for recovering thermal energy, and is effective when applied to a vehicle air conditioner.

  In the patent application of Japanese Patent Application No. 2003-410094, the present inventors have proposed a vehicle air conditioner including a Rankine cycle that recovers thermal energy from waste heat of an engine mounted on a vehicle (hereinafter referred to as a prior application). Referred to as an example).

  The prior application example of FIG. 4 is provided with an air conditioning operation mode in which the refrigerant flows in the order of the expander-integrated compressor 100 → the radiator 11 → the gas-liquid separator 12 → the decompressor 13 → the evaporator 14.

  Furthermore, the liquid phase piping 31 which connects the liquid phase side of the gas-liquid separator 12 and the steam generator 30, and the liquid pump 32 which is arrange | positioned at the liquid phase piping 31 and sends a liquid phase refrigerant | coolant to the steam generator 30 are provided. , A waste heat recovery operation mode (Rankine cycle) in which the refrigerant flows in the order of the liquid pump 32 → the steam generator 30 → the expander-integrated compressor 100 → the radiator 11 is provided.

  Thereby, the vehicle interior space can be air-conditioned in the air-conditioning operation mode, and the waste heat of the engine 20 can be recovered by the expander-integrated compressor 100 in the waste heat recovery operation mode.

  However, the vapor compression refrigerator of the prior application example (FIG. 4) is provided with an on-off valve 51 that blocks the flow of refrigerant from the compressor discharge side of the expander-integrated compressor 100 toward the radiator 11. ing. Furthermore, the expander-integrated compressor 100 operates as an expander in the bypass circuit 52 that connects the refrigerant outlet side when the expander-integrated compressor 100 operates as an expander and the refrigerant inlet side of the radiator 11. A check valve 53 that allows the refrigerant to flow only from the refrigerant outlet side to the refrigerant inlet side of the radiator 11 is disposed.

  Since the refrigerant flow is switched between the air conditioning operation mode and the waste heat recovery operation mode by opening / closing the on-off valve 51 and restricting the flow of the check valve 53, the number of pipes and joints (connecting members) increases and the cost increases. There's a problem.

  In view of the above, the present invention is directed to a vapor compression refrigerator having a waste heat recovery operation mode (Rankine cycle), and the refrigerant flow in the waste heat recovery operation mode (Rankine cycle) and in the air conditioning operation mode (refrigeration cycle). It aims at reduction of the member to switch.

In order to achieve the above object, according to the first aspect of the present invention, in the vapor compression refrigerator, the compressor (10, 100) for sucking and compressing the refrigerant, and the refrigerant discharge side of the compressor (10, 100) are arranged. And a radiator (11) for cooling the refrigerant, a decompressor (13) for decompressing the refrigerant flowing out of the radiator (11), and an evaporator (14) for evaporating the refrigerant decompressed by the decompressor (13). ), A heater (30) for heating the refrigerant, a refrigerant supply means (32) for supplying the refrigerant flowing out of the radiator (11) to the heater (30), and a refrigerant flowing out of the heater (30) When connecting the energy recovery machine (33, 100) which expands and recovers the heat energy given to the refrigerant by the heater (30), and the discharge side of the compressor (10, 100) and the radiator (11) And the discharge side of the energy recovery machine (33, 100) Radiator (11) switching means (15) for switching the refrigerant passage in the case of connecting the and equipped with,
When the refrigeration capacity is exhibited in the evaporator (14), after the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), the compressor (10) The refrigerant is circulated in the order of the compressor (10, 100) → the radiator (11) → the decompressor (13) → the evaporator (14) → the compressor (10, 100),
When energy is recovered by the energy recovery machine (33, 100), the switching means (15) connects the discharge side of the energy recovery machine (33, 100) and the radiator (11), and then the refrigerant supply means. (32) is circulated in the order of refrigerant supply means (32) → heater (30) → energy recovery machine (33, 100) → radiator (11) → heater (30) → refrigerant supply means (32). It is characterized by becoming.

  According to this, when the refrigerating capacity is exhibited in the evaporator (14), the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), while energy recovery. When energy is recovered by the machines (33, 100), the switching means (15) connects the discharge side of the energy recovery machine (33) and the radiator (11). In other words, the switching means (15) performs the on-off valve opening / closing control and the check valve flow restriction in the prior application example (FIG. 4). That is, the member required for switching the refrigerant passage can be halved from the on-off valve and the check valve of the prior application to the switching means (15). Furthermore, since the number of pipes and joints (connecting members) can be reduced as compared with the prior application example, the cost of the vapor compression refrigerator can be reduced.

Moreover, in invention of Claim 2, in a vapor compression refrigerator, when connecting the discharge side of a compressor (10,100) and a radiator (11), and an energy recovery machine (33,100) Switching means (15) for switching the refrigerant passage when connecting the suction side and the radiator (11),
When the refrigeration capacity is exhibited in the evaporator (14), after the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), the compressor (10) The refrigerant is circulated in the order of the compressor (10, 100) → the radiator (11) → the decompressor (13) → the evaporator (14) → the compressor (10, 100),
When energy is recovered by the energy recovery machine (33, 100), the switching means (15) connects the suction side of the energy recovery machine (33, 100) and the radiator (11), and then the refrigerant supply means. (32) is circulated in the order of refrigerant supply means (32) → heater (30) → energy recovery machine (33, 100) → radiator (11) → heater (30) → refrigerant supply means (32). It is characterized by becoming.

  According to this, when the refrigerating capacity is exhibited in the evaporator (14), the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), while energy recovery. When energy is recovered by the machines (33, 100), the switching means (15) connects the suction side of the energy recovery machine (33) and the radiator (11). In other words, the switching means (15) performs the on-off valve opening / closing control and the check valve flow restriction in the prior application example (FIG. 4). That is, the member required for switching the refrigerant passage can be halved from the on-off valve and the check valve of the prior application to the switching means (15). Furthermore, since the number of pipes and joints (connecting members) can be reduced as compared with the prior application example, the cost of the vapor compression refrigerator can be reduced.

  In addition, as in the invention described in claim 3, in the vapor compression refrigerator of claim 1 or 2, the energy recovery machine (33) may be connected in parallel with the compressor (10).

  Further, as in the invention according to claim 4, in the vapor compression refrigerator according to any one of claims 1 to 3, the compressor (10) and the energy recovery machine (33) are integrated. An expander-integrated compressor (100) may be provided, and the expander-integrated compressor (100) may function as an energy recovery device (33) when refrigerant flowing out of the heater (30) flows in.

  Moreover, in the vapor compression refrigerator according to any one of claims 1 to 4, as in the invention described in claim 5, the heater (30) is connected to the compressor (10, 100) and the heat dissipation. You may arrange | position in the refrigerant circuit which connects a container (11).

  Further, as in the invention described in claim 6, in the vapor compression refrigerator according to any one of claims 1 to 5, the refrigerant flowing out of the radiator (11) is converted into a gas phase refrigerant and a liquid phase refrigerant. If the liquid-phase refrigerant separated by the gas-liquid separator (12, 16) is supplied to the heater (30) by the refrigerant supply means (32), Only the liquid phase refrigerant can be reliably supplied to the heater (30).

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 shows a first embodiment in which a vapor compression refrigerator of the present invention is applied to a vehicle air conditioner. The vehicle air conditioner according to the present embodiment recovers energy from waste heat generated by the engine 20, which is a heat engine that generates driving power, and cools and heats generated by the vapor compression refrigerator in the vehicle interior space. It is used for air conditioning.

  An expander-integrated compressor 100 shown in FIG. 1 has both a function as a compressor 10 that sucks and compresses refrigerant and a function as an expander 33 that expands superheated steam isentropically to extract power. It is. When the expander-integrated compressor 100 is operated as a compressor, the motor generator 100a operates as a power source that gives power (rotational force) to the expander-integrated compressor 100. On the other hand, when the expander-integrated compressor 100 is operated as an expander, the expander, that is, a rotating electrical machine that operates as a generator that generates electric power with the power recovered by the expander-integrated compressor 100 is used. is there. The structure of the expander-integrated compressor 100 will be described later.

  The radiator 11 is connected to the discharge side when the expander-integrated compressor 100 operates as a compressor via a refrigerant three-way valve 15 described later, and dissipates the refrigerant to the outside air, that is, cools the refrigerant with the outside air. It is a cooler. The refrigerant that has flowed out of the radiator 11 flows into the gas-liquid separator 12 (receiver) that separates the gas-phase refrigerant and the liquid-phase refrigerant.

  The refrigerant three-way valve 15 connects the compressor discharge side of the expander-integrated compressor 100 and the radiator 11, and connects the expander discharge side of the expander-integrated compressor 100 and the radiator 11. Switching means for switching the refrigerant passage. In the present embodiment, the operation of the refrigerant three-way valve 15 is controlled by a signal from an electronic control device (not shown).

  The decompressor 13 decompresses and expands the liquid-phase refrigerant separated by the gas-liquid separator 12. In this embodiment, the decompressor 13 decompresses the refrigerant in an enthalpy manner, and the expander-integrated compressor 100 operates as a compressor. When this is done, a temperature type expansion valve is used that controls the throttle opening so that the degree of superheat of the refrigerant sucked into the expander-integrated compressor 100 becomes a predetermined value.

  The evaporator 14 is a heat absorber that evaporates the refrigerant depressurized by the pressure reducer 13 and exhibits an endothermic effect. The refrigerant that has flowed out of the evaporator 14 flows into the expander-integrated compressor 100 again. As described above, the vapor compression refrigeration in which the heat on the low temperature side is moved to the high temperature side by the compressor (expander-integrated compressor 100), the radiator 11, the gas-liquid separator 12, the decompressor 13, the evaporator 14, and the like. Machine (refrigeration cycle) is configured.

  By the way, in this embodiment, the engine cooling circuit in which the cooling water for cooling the engine 20 which is a heat generating body circulates is provided. The water pump 22 arranged in the engine cooling circuit circulates the engine cooling water, and the radiator 23 is a heat exchanger that cools the engine cooling water by exchanging heat between the engine cooling water and the outside air. The cooling water bypass circuit 24 bypasses the radiator 23 and flows cooling water, and the thermostat 25 is a flow rate adjustment valve that adjusts the cooling water amount flowing to the cooling water bypass circuit 24 and the cooling water amount flowing to the radiator 23. .

  Incidentally, although the water pump 22 is a mechanical pump that operates by obtaining power from the engine 20, it goes without saying that an electric pump driven by an electric motor may be used.

  In addition, a steam generator 30 that is a heater is disposed in the refrigerant flow downstream portion of the engine 20 in the engine cooling circuit and in the refrigerant circuit that connects the expander-integrated compressor 100 and the radiator 11 in the refrigeration cycle. Yes. The steam generator 30 heats the refrigerant by exchanging heat between the refrigerant flowing through the refrigerant circuit and the engine coolant that has recovered the waste heat of the engine 20.

  Further, in the engine cooling circuit, the cooling water three-way valve 21 switches between the case where the engine cooling water flowing out from the engine 20 is circulated to the steam generator 30 and the case where it is not circulated. In the present embodiment, the operation of the cooling water three-way valve 21 is controlled by an electronic control device (not shown).

  By the way, the liquid phase pipe 31 is a refrigerant passage that guides the liquid phase refrigerant separated by the gas-liquid separator 12 to the refrigerant inlet / outlet side on the radiator 11 side of the steam generator 30. The liquid phase pipe 31 is provided with a liquid pump 32 for circulating the liquid phase refrigerant and a check valve 31a that allows the refrigerant to flow only from the gas-liquid separator 12 side to the steam generator 30 side. . In the present embodiment, the liquid pump 32 is an electric pump, and the operation of the liquid pump 32 is controlled by an electronic control device (not shown).

  The bypass circuit 34 is a refrigerant passage that connects the refrigerant outlet side and the refrigerant inlet side of the radiator 11 via the refrigerant three-way valve 15 when the expander-integrated compressor 100 operates as an expander.

  The check valve 14 a allows the refrigerant to flow only from the refrigerant outlet side of the evaporator 14 to the suction side of the compressor 10. The control valve 36 is a valve that operates as a discharge valve, that is, a check valve when the expander-integrated compressor 100 operates as a compressor, and opens when the expander-integrated compressor 100 operates as an expander. Is also controlled by an electronic control unit (not shown). In this way, a Rankine cycle is formed in which the refrigerant flows through the expander-integrated compressor 100, the condenser 11, the gas-liquid separator 12, the liquid pump 32, and the like.

  Next, the schematic structure and operation of the expander-integrated compressor 100 will be described.

  FIG. 2A shows a case where the expander-integrated compressor 100 operates as a compressor, and FIG. 2B shows a case where the expander-integrated compressor 100 operates as an expander. In the embodiment, the expander-integrated compressor 100 is configured by a well-known vane-type fluid machine.

  When the expander-integrated compressor 100 is operated as a compressor, the motor generator 100a rotates the rotor 100b to suck and compress the refrigerant, and the high-pressure refrigerant discharged from the control valve 36 becomes the rotor 100b. Backflow to the side is prevented.

  Further, when the expander-integrated compressor 100 is operated as an expander, the control valve 36 is opened and superheated steam generated by the steam generator 30 is introduced into the expander-integrated compressor 100 so as to be rotor. 100b is rotated to convert thermal energy into mechanical energy.

  The electronic control unit includes a detection temperature Tw of a water temperature sensor that detects the temperature of engine cooling water after absorbing heat from the engine 20, an air conditioner operation signal (A / C operation request) issued from the electronic control unit for the air conditioner. An input section to which a signal) is input is provided.

  Next, the operation of the vapor compression refrigerator (air conditioner) including the Rankine cycle according to the present embodiment will be described. The vapor compression refrigerator having the Rankine cycle of the present embodiment performs the following operation mode according to a program stored in advance based on the detected temperature of the water temperature sensor, that is, the waste heat temperature Tw and the presence / absence of an A / C operation request signal. The operation of the control valve 36, the liquid pump 32, the refrigerant three-way valve 15, the cooling water three-way valve 21 and the like is controlled. First, the air conditioning operation mode and the waste heat recovery operation mode will be described.

1. Air-conditioning operation mode This operation mode is an operation mode in which the refrigerant is allowed to cool by the radiator 11 while the refrigeration ability is exhibited by the evaporator 14. In this embodiment, the vapor compression refrigerator is operated only for the cooling generated by the vapor compression refrigerator, that is, the cooling operation and the dehumidification operation using the endothermic effect, and the warm heat generated by the radiator 11 is used. Although the heating operation is not performed, the operation of the vapor compression refrigerator is the same as that during the cooling operation and the dehumidifying operation even during the heating operation.

  Specifically, the refrigerant three-way valve 15 is further connected to the compressor discharge side of the expander-integrated compressor 100 in a state where the control device stops the liquid pump 32 and the control valve 36 functions as a check valve. And the radiator 11 are operated in the state of the dotted line in FIG. Thereafter, the motor generator 100a is energized to rotate the rotor 100b, and the cooling water three-way valve 21 is operated as shown by the broken line in FIG. 1 to bypass the steam generator 30 and circulate the cooling water.

  As a result, the refrigerant is the expander integrated compressor (compressor) 100 → the steam generator 30 → the refrigerant three-way valve 15 → the radiator 11 → the gas-liquid separator 12 → the decompressor 13 → the evaporator 14 → the expander integrated type. It circulates in order of the compressor (compressor) 100. In addition, since engine cooling water does not circulate through the steam generator 30, the refrigerant is not heated by the steam generator 30, and the steam generator 30 functions as a simple refrigerant passage.

  Therefore, the low-pressure refrigerant decompressed by the decompressor 13 absorbs heat from the air blown into the room and evaporates, and the evaporated gas-phase refrigerant is compressed by the compressor 100 and becomes a high temperature, and the heat radiator 11 Cools with air and condenses.

  In the present embodiment, chlorofluorocarbon (HFC134a) is used as the refrigerant. However, the refrigerant is not limited to HFC134a as long as the refrigerant is liquefied on the high-pressure side.

2. Waste Heat Recovery Operation Mode This operation mode is a mode in which the air conditioner, that is, the compressor 100 is stopped and the waste heat of the engine 20 is recovered as usable energy.

  Specifically, when the control device connects the refrigerant three-way valve 15 to the expander discharge side of the expander-integrated compressor 100 and the radiator 11 in the solid line in FIG. 1 and the control valve 36 is open. While operating the liquid pump 32, the cooling water three-way valve 21 is operated as shown by the solid line in FIG. 1 to circulate the engine cooling water flowing out from the engine 20 to the steam generator 30.

  Thereby, the refrigerant is liquid pump 32 (liquid phase pipe 31) → steam generator 30 → expander-integrated compressor (expander) 100 → bypass circuit 34 → refrigerant three-way valve 15 → radiator 11 → gas-liquid separator. It circulates in order of 12-> liquid pump 32 (liquid phase piping 31).

  Therefore, the superheated steam heated by the steam generator 30 flows into the expander-integrated compressor 100, that is, the expander, and the steam refrigerant flowing into the expander-integrated compressor 100 is expanded by the expander-integrated compression. The enthalpy is lowered while expanding in the machine 100 in an isentropic manner. Therefore, the expander-integrated compressor 100 gives mechanical energy corresponding to the reduced enthalpy to the motor generator 100a, and the electric power generated by the motor generator 100a is stored in a battery or a capacitor such as a capacitor.

  The refrigerant flowing out of the expander-integrated compressor 100 is cooled and condensed by the radiator 11 and stored in the gas-liquid separator 12. The liquid-phase refrigerant in the gas-liquid separator 12 is the liquid pump 32. Is sent to the steam generator 30 side.

  As described above, in the waste heat recovery operation mode, the heat energy discarded in the atmosphere as heat by the radiator 23 is converted into energy that can be easily used, such as electric power. That is, the fuel consumption of the engine 20 can be reduced.

  Further, in the waste heat recovery operation mode, power is generated by the waste heat of the engine 20, so that the necessity of driving a generator such as an alternator with the engine 20 is reduced, and the fuel consumption of the engine 20 can be further reduced. .

  Next, actions and effects according to the first embodiment are listed. (1) When the refrigerant three-way valve 15 is in the air conditioning operation mode, the compressor discharge side of the expander-integrated compressor 100 and the radiator 11 are connected, while the waste In the heat recovery operation mode, the expander discharge side of the expander-integrated compressor 100 and the radiator 11 are connected. That is, the refrigerant three-way valve 15 performs the opening / closing control of the opening / closing valve 51 and the flow restriction of the check valve 53 arranged in the bypass circuit 52 in the prior application example (FIG. 4).

  That is, the members necessary for switching the refrigerant passage can be halved from the on-off valve 51 and the check valve 53 of the prior application to the refrigerant three-way valve 15. Furthermore, since the number of pipes and joint connecting members can be reduced as compared with the prior application example, the cost of the vapor compression refrigerator can be reduced.

  (2) Since the compressor-integrated compressor 100 in which the compressor 10 and the energy recovery machine 33 are integrated is used, the number of compressors 10 and the energy recovery machine 33 is smaller than when separate compressors 10 and the energy recovery machine 33 are arranged. A compressor function and an energy recovery function can be provided in space.

  Furthermore, in order to arrange the compressor 10 and the energy recovery machine 33, an on-off valve that controls the opening and closing of a pipe in which the compressor 10 and the energy recovery machine 33 are arranged according to the operation of the compressor 10 and the energy recovery machine 33. Must be provided. However, in the expander-integrated compressor 100, the piping and valves can be halved, so that the cost of the entire vapor compression refrigerator can be reduced.

(Second Embodiment)
The present embodiment shown in FIG. 3 has substantially the same configuration as that of the first embodiment, but the bypass circuit 34 of the present embodiment includes a portion between the evaporator 14 and the expander-integrated compressor 100, and the radiator 11. And a portion between the gas-liquid separator 12 is connected. The bypass circuit 34 is provided with a check valve 34 a that allows the refrigerant to flow only from the expander-integrated compressor 100 side to the radiator 11 side.

  Further, between the radiator 11 and the steam generator 30, a refrigerant passage 17 connecting the radiator 11 and the steam generator 30 via the refrigerant three-way valve 15, and a second branch branched from the refrigerant passage 17. A liquid phase pipe 31 that connects the radiator 11 and the steam generator 30 via the gas-liquid separator 16, the liquid pump 32, and the refrigerant three-way valve 15 is disposed.

  In the air-conditioning operation mode, the refrigerant three-way valve 15 is further connected to the compressor of the expander-integrated compressor 100 while the control device stops the liquid pump 32 and the control valve 36 functions as a check valve. It operates to the state of the dotted line in FIG. 3 which connects the discharge side and the radiator 11 (refrigerant passage 17). Thereafter, the motor generator 100a is energized to rotate the rotor 100b, and the cooling water three-way valve 21 is operated as indicated by the broken line in FIG. 3 to bypass the steam generator 30 and circulate the cooling water.

  As a result, the refrigerant is the expander integrated compressor (compressor) 100 → the steam generator 30 → the refrigerant three-way valve 15 → the radiator 11 → the gas-liquid separator 12 → the decompressor 13 → the evaporator 14 → the expander integrated type. It circulates in order of the compressor (compressor) 100. In addition, since engine cooling water does not circulate through the steam generator 30, the refrigerant is not heated by the steam generator 30, and the steam generator 30 functions as a simple refrigerant passage.

  On the other hand, in the waste heat recovery operation mode, the control device connects the refrigerant three-way valve 15 to the radiator 11 and the expander suction side of the expander-integrated compressor 100 (in this embodiment, via the liquid phase pipe 31 and the steam generator 30). The liquid pump 32 is operated in the state of the solid line in FIG. 3 and the control valve 36 is open, and the cooling water three-way valve 21 is operated as shown by the solid line in FIG. The engine cooling water flowing out from 20 is circulated to the steam generator 30.

  Thereby, the refrigerant is liquid pump 32 (liquid phase piping 31) → refrigerant three-way valve 15 → steam generator 30 → expander-integrated compressor (expander) 100 → bypass circuit 34 → radiator 11 → second gas / liquid. It circulates in order of separator 16-> liquid pump 32 (liquid phase piping 31).

  According to this, when the refrigerant three-way valve 15 is in the air-conditioning operation mode, the compressor discharge side of the expander-integrated compressor 100 and the radiator 11 (refrigerant passage 17) are connected, while in the waste heat recovery operation mode, the expander The expander suction side of the integrated compressor 100 and the radiator 11 (liquid phase piping 31) are connected. That is, the refrigerant three-way valve 15 performs the opening / closing control of the opening / closing valve 51 and the flow restriction of the check valve 53 arranged in the bypass circuit 52 in the prior application example (FIG. 4).

  That is, the members necessary for switching the refrigerant passage can be halved from the on-off valve 51 and the check valve 53 of the prior application to the refrigerant three-way valve 15. Furthermore, since the number of pipes and joint connecting members can be reduced as compared with the prior application example, the cost of the vapor compression refrigerator can be reduced.

  In this embodiment, it is natural that the effect (2) described in the first embodiment can be exhibited.

(Other embodiments)
In the above-described embodiment, the energy recovered by the expander-integrated compressor 100 is stored in the capacitor, but it may be stored as mechanical energy such as elastic energy by a kinetic energy by a flywheel or a spring.

  In the first and second embodiments (FIGS. 1 and 3), the heater 30 is arranged in series between the radiator 11 and the expander-integrated compressor 100. Since the heating is performed only during the waste heat recovery operation, the Rankine cycle can be operated even if the heater 30 is disposed in parallel between the radiator 11 and the expander-integrated compressor 100.

  Further, as heat sources for heating the refrigerant, waste heat generated from various devices mounted on the vehicle, for example, intake heat of a turbo, generated heat of an inverter, a fuel cell (FC), and waste heat of an auxiliary machine may be used. . The refrigerant may be heated using only one heat source, or the refrigerant may be heated using a plurality of heat sources in combination.

  In the above-described embodiment, the expander-integrated compressor 100 and the vane type fluid machine are used as the compressor and the expander. However, the present invention is not limited to this.

  The application of the present invention is not limited to a vehicle air conditioner, and can be applied to a stationary refrigeration cycle (refrigerator).

  In the above-described embodiment, the expander-integrated compressor 10 in which the compressor and the expander are integrated is used. However, the compressor and the expander may be provided independently. Further, the compressor and the expander may be arranged in parallel.

  Further, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims.

It is a mimetic diagram of a vapor compression refrigeration machine concerning a 1st embodiment of the present invention. It is a figure of the expander integrated compressor which concerns on 1st Embodiment of this invention. It is a schematic diagram of the vapor compression refrigerator which concerns on 2nd Embodiment of this invention. It is a schematic diagram of a vapor compression refrigerator according to a prior application example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Compressor, 11 ... Radiator, 12 ... Gas-liquid separator, 13 ... Decompressor, 14 ... Evaporator,
15 ... Three-way valve (switching means), 16 ... Second gas-liquid separator (gas-liquid separator),
30 ... Steam generator (heater), 32 ... Liquid pump (refrigerant supply means),
33 ... Expander (energy recovery machine),
100: An expander-integrated compressor (compressor, energy recovery machine).

Claims (6)

A compressor (10, 100) for sucking and compressing refrigerant;
A radiator (11) disposed on the refrigerant discharge side of the compressor (10, 100) for cooling the refrigerant;
A decompressor (13) for decompressing the refrigerant flowing out of the radiator (11);
An evaporator (14) for evaporating the refrigerant decompressed by the decompressor (13);
A heater (30) for heating the refrigerant;
Refrigerant supply means (32) for supplying the refrigerant flowing out of the radiator (11) to the heater (30);
An energy recovery machine (33, 100) for expanding the refrigerant flowing out of the heater (30) and recovering heat energy given to the refrigerant by the heater (30);
When connecting the discharge side of the compressor (10, 100) and the radiator (11), and connecting the discharge side of the energy recovery machine (33, 100) and the radiator (11) Switching means (15) for switching the refrigerant passage to
When the refrigeration capacity is exhibited in the evaporator (14), the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), and then the compression. The machine (10) circulates the refrigerant in the order of the compressor (10, 100) → the radiator (11) → the decompressor (13) → the evaporator (14) → the compressor (10, 100). And
When energy is recovered by the energy recovery machine (33, 100), after the switching means (15) connects the discharge side of the energy recovery machine (33, 100) and the radiator (11). The refrigerant supply means (32) is the refrigerant supply means (32) → the heater (30) → the energy recovery machine (33, 100) → the radiator (11) → the heater (30) → the refrigerant. A vapor compression refrigerator that is circulated in the order of the supply means (32). A compressor (10, 100) for sucking and compressing refrigerant;
A radiator (11) disposed on the refrigerant discharge side of the compressor (10, 100) for cooling the refrigerant;
A decompressor (13) for decompressing the refrigerant flowing out of the radiator (11);
An evaporator (14) for evaporating the refrigerant decompressed by the decompressor (13);
A heater (30) for heating the refrigerant;
Refrigerant supply means (32) for supplying the refrigerant flowing out of the radiator (11) to the heater (30);
An energy recovery machine (33, 100) for expanding the refrigerant flowing out of the heater (30) and recovering heat energy given to the refrigerant by the heater (30);
A case where the discharge side of the compressor (10, 100) and the radiator (11) are connected, and a case where the suction side of the energy recovery machine (33, 100) and the radiator (11) are connected. Switching means (15) for switching the refrigerant passage to
When the refrigeration capacity is exhibited in the evaporator (14), the switching means (15) connects the discharge side of the compressor (10, 100) and the radiator (11), and then the compression. The machine (10) circulates the refrigerant in the order of the compressor (10, 100) → the radiator (11) → the decompressor (13) → the evaporator (14) → the compressor (10, 100). And
When energy is recovered by the energy recovery machine (33, 100), the switching means (15) connects the suction side of the energy recovery machine (33, 100) and the radiator (11). The refrigerant supply means (32) is the refrigerant supply means (32) → the heater (30) → the energy recovery machine (33, 100) → the radiator (11) → the heater (30) → the refrigerant. A vapor compression refrigerator that is circulated in the order of the supply means (32). The vapor compression refrigerator according to claim 1 or 2, wherein the energy recovery machine (33) is connected in parallel with the compressor (10). An expander-integrated compressor (100) in which the compressor (10) and the energy recovery machine (33) are integrated;
The expander-integrated compressor (100) functions as the energy recovery unit (33) when refrigerant flowing out of the heater (30) flows in. 4. The vapor compression refrigerator as set forth in any one of 3. The said heater (30) is provided in the refrigerant circuit which connects the said compressor (10, 100) and the said heat radiator (11), It is any one of Claim 1 thru | or 4 characterized by the above-mentioned. Vapor compression refrigerator. A gas-liquid separator (12, 16) for separating the refrigerant flowing out of the radiator (11) into a gas-phase refrigerant and a liquid-phase refrigerant;
The liquid-phase refrigerant separated by the gas-liquid separator (12, 16) is supplied to the heater (30) by the refrigerant supply means (32). The vapor compression refrigerator according to any one of the above.

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