JP2008190792A - Compression type heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compression type heat pump of high coefficient of performance. <P>SOLUTION: In this compression type heat pump constituted by successively connecting a discharge opening of a compressor, a condenser, an evaporator and a suction opening of the compressor, first, second and third heat exchangers 3, 4, 5 are disposed in series in a refrigerant circulating circuit of the compression type heat pump 1, and the condenser and the evaporator are integrated in the second heat exchanger 4 in the middle of three heat exchangers. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a condenser and a condenser serving as an evaporator, in addition to at least two heat exchangers serving as a condenser and an evaporator connected to a discharge port and a suction port of the compressor, respectively. The present invention relates to a compression heat pump including a heat exchanger integrated with an evaporator.

  The compression heat pump uses air or the ground as a heat source or a cold source, and both the air heat source compression heat pump and the ground heat source compression heat pump are widely used in combined air conditioners. In an air conditioner using an air source heat pump, when used for cooling in the summer, the temperature of the outside air is high when the temperature of the outside air is high, and when used for heating in the winter, the temperature of the outside air is low. The coefficient of performance is low.

  On the other hand, in an air conditioner or heating / cooling device using a compression type ground source heat pump, the change in underground temperature is small compared to the change in temperature of the outside air, so the coefficient of performance is high. An intermediate heat source heat pump is disclosed in Patent Document 1.

Japanese Patent No. 2545720

  In the compression heat pump described in Patent Document 1, the introduction pipe whose upstream end is connected to the condenser passes through the top wall of the evaporator embedded in the ground, and the downstream end of the introduction pipe is the evaporator. The liquefied refrigerant jetted into the evaporator from the downstream end of the introduction pipe flows down in contact with the evaporator inner peripheral wall surface, and the refrigerant flows into the evaporator. It receives underground heat through the wall and is vaporized.

  In addition, a pump is attached to the lower end of the discharge pipe that extends through the top wall of the evaporator to the vicinity of the bottom of the evaporator, and the discharge pipe is formed with an ejection hole, and the downstream end of the introduction pipe Part of the liquefied refrigerant ejected from the evaporator toward the inner peripheral surface of the evaporator is vaporized on the inner peripheral surface of the evaporator, but the liquefied refrigerant accumulated in the evaporator without being evaporated is added by the pump. Thus, the liquid is ejected from the ejection hole toward the inner peripheral surface of the evaporator, and the evaporation of the liquefied refrigerant is promoted.

  However, in the compression heat pump described in Patent Document 1, since the pump is disposed at the bottom of the evaporator, in order to perform maintenance and maintenance of the pump, the top wall of the evaporator is removed and the introduction pipe is placed on the ground. These operations were cumbersome and difficult.

  Further, there is a power loss because the liquefied refrigerant accumulated in the evaporator needs to be pressurized by a pump and injected toward the inner peripheral surface of the evaporator.

  Further, since the liquefied refrigerant in the evaporator repeatedly flows in the pump, the lubricating oil mixed in the refrigerant accumulates. As a result, a separation device for separating and removing the lubricating oil from the refrigerant is required, and the heat pump The overall structure has become complicated and cost increases cannot be avoided.

  In addition, in an air conditioner that releases air that is heat-exchanged with the refrigerant into the room, warm air stays at the top of the room during heating, and the head of the person in the room is heated and the feet are easily cooled. It is not preferable from the viewpoint of health to those who are weak.

  Furthermore, the air conditioner is not preferable for health even for those who are in a place where cold air having a temperature lower than the room temperature is directly blown during cooling.

  An object of the present invention is to provide a compression heat pump having a high coefficient of performance that overcomes such difficulties.

  Another object of the present invention is to provide a compression heat pump used for a floor heating / cooling apparatus, in which the fluid exchanged with the refrigerant through the heat exchanger is a liquid such as water.

  The invention according to claim 1 is a compression heat pump in which a discharge port of a compressor, a condenser, an evaporator, and a suction port of the compressor are sequentially connected. In the refrigerant circulation circuit of the compression heat pump, The first, second and third heat exchangers are arranged in series, and the condenser and the evaporator are integrated in the middle second heat exchanger, and the second heat exchanger Is composed of an inner sealed container and an outer sealed container that seals the outer periphery of the inner sealed container with a predetermined gap, and has an outer space having a function of a condenser sealed by the inner sealed container and the outer sealed container. And a refrigerant passage that is partitioned into an inner space having a function of a second heat exchanger in the inner sealed container and guides the refrigerant condensed by the compressor to an outer space of the second heat exchanger, 1st expansion which guides the refrigerant in the outer space of the two heat exchangers to the inner space A valve and a variable throttle second expansion valve that guides the refrigerant in the outer space of the second heat exchanger to a portion connected to the suction port of the compressor, and is provided inside the second heat exchanger. The space is a compression heat pump characterized in that the space is connected to an inlet of the compressor.

  A second aspect of the present invention is the compression heat pump according to the first aspect, wherein the second heat exchanger is embedded in the ground.

  According to a third aspect of the present invention, the variable throttle second expansion valve is disposed above the second heat exchanger or at the top of the inner space, and the compressor from the inner space of the second heat exchanger. The compression heat pump according to claim 1 or 2, wherein the compression heat pump is provided in parallel to a pipe line connected to the suction side of the pipe.

  According to a fourth aspect of the present invention, the first expansion valve is constituted by a thin tube, penetrates the bottom wall portion of the inner sealed container, and the lower end of the first expansion valve opens into the outer space, 4. The compression heat pump according to claim 1, wherein an upper end of the first expansion valve opens into the inner space, and is wound in a coil shape in the inner space. 5. is there.

  The invention according to claim 5 is characterized in that the throttle of the variable expansion second expansion valve is automatically controlled in accordance with the heat load of the compression heat pump. This is a compression heat pump.

  According to a sixth aspect of the present invention, the inner end of the heat pipe penetrating the outer sealed container of the second heat exchanger is integrally joined to the inner surface of the outer sealed container or the outer surface of the inner sealed container, and the heat 6. The compression heat pump according to claim 2, wherein an outer end portion of the pipe is exposed to the outside of the second heat exchanger.

  A seventh aspect of the present invention is the compression heat pump according to any one of the second to sixth aspects, wherein an underground sprinkling nozzle is provided on an outer peripheral portion of the second heat exchanger.

  The invention according to claim 8 is the compression heat pump according to claim 2 or 7, wherein the outside of the second heat exchanger is coated with a slurry of a water-absorbing gel substance having a high thermal conductivity. It is.

  The invention according to claim 9 is the compression heat pump according to claim 8, wherein the slurry of the water-absorbing gel substance is covered with a lid.

  The invention according to claim 10 is used as a heating device or a hot water supply device using a heat exchanger connected to a discharge port of the compressor as a condenser and using the condenser as a heat source. A compression heat pump according to claim 9.

  The invention according to claim 11 is used as a cooling device in which the heat exchanger connected from the second heat exchanger to the suction port of the compressor is an evaporator, and the evaporator is a cold source. A compression heat pump according to any one of claims 1 to 9.

  According to a twelfth aspect of the present invention, the fluid that exchanges heat with the refrigerant through the heat exchanger is a liquid and is used in a floor cooling / heating device. The compression heat pump according to any one of 11.

  A thirteenth aspect of the present invention is a method of embedding the second heat exchanger of the compression heat pump according to the eighth aspect of the invention, wherein an outer sealed container of the second heat exchanger is formed in a cylindrical shape. A spiral fin is integrally provided on the outer peripheral surface of the cylindrical outer sealed container, and the cylindrical outer sealed container is swung down along the downwardly inclined direction of the spiral fin while being pressed downward. A method of burying the second heat exchanger in the ground of the compression heat pump, wherein the second heat exchanger is buried in the ground.

  According to the first aspect of the present invention, the exchanger that first receives the refrigerant discharged from the discharge port of the compressor serves as a condenser. In this heat exchanger, since the high-temperature refrigerant passes, The fluid that is heat-exchanged with the high-temperature refrigerant in the heat exchanger is heated, and this fluid is used for heating.

  The gas-liquid mixed refrigerant that has flowed from the compressor into the outer space having the condenser function in the second heat exchanger via the first heat exchanger is in contact with the outer sealed container of the second heat exchanger, such as earth or water The refrigerant is further cooled by the heat exchange with the supercooled refrigerant in the inner sealed container of the second heat exchanger and further cooled, and the refrigerant further subcooled in the outer sealed container The refrigerant discharged to the inner sealed container through the one expansion valve, and the refrigerant released from the outer sealed container to the inner sealed container at this time is adiabatically expanded and further cooled to supercooling, The supercooled low-temperature refrigerant passes through the heat exchanger, passes through the heat exchanger connected to the compressor inlet, and returns to the compressor inlet.

  When hot water in the hot water storage tank is supplied when supercooled low-temperature refrigerant passes through the heat exchanger leading to the compressor inlet, the supercooled low-temperature refrigerant is heated by heat exchange with hot water. Since the temperature of the refrigerant sucked into the compressor inlet increases, the temperature of the refrigerant passing through the heat exchanger leading to the compressor outlet becomes high, and heat is exchanged with the refrigerant in the heat exchanger. The fluid temperature to be heated becomes a high level, and a powerful heating operation state is obtained.

  The gas-liquid mixed refrigerant that has flowed into the second heat exchanger from the compressor through the first heat exchanger is condensed in the outer space of the second heat exchanger and is adiabatically expanded in the inner space. Thus, the temperature is lowered to supercooling, and the required cooling operation state is obtained by the supercooled refrigerant passing through the heat exchanger connected to the suction port of the compressor.

  According to invention of Claim 2, since the 2nd heat exchanger is embed | buried under the ground with the small temperature change of the summer and winter, it is underground and indoors in any of a heating state and a cooling state Small temperature difference from air and high coefficient of performance.

  According to the third aspect of the present invention, when the refrigerant evaporation amount in the inner space of the second heat exchanger is insufficient regardless of the heating operation state, the strong heating operation state, or the cooling operation state. By opening the variable throttle second expansion valve or increasing its opening, the evaporation amount of the refrigerant is replenished, and a required heating state or cooling state is obtained.

  According to the fourth aspect of the present invention, the first expansion valve is formed by winding the narrow tube in a coil shape, and as a result, the refrigerant flowing in the coiled narrow tube is heat-exchanged with the low-temperature refrigerant in the inner space. The sufficiently cooled refrigerant is released into the inner space, and the temperature of the refrigerant in the inner space further decreases.

  According to the fifth aspect of the present invention, since the variable throttle second expansion valve is automatically controlled in accordance with the heat load of the compression heat pump, a required heating operation state or cooling operation state can be obtained.

  According to the sixth aspect of the present invention, heat in the ground can be effectively transferred to the refrigerant in the outer space of the second heat exchanger by the heat pipe.

  According to the seventh aspect of the invention, since water is sprinkled into the ground from the ground sprinkling nozzle, the refrigerant is effectively exchanged with the ground during the cooling operation state, and the air conditioning effect is high.

  According to the eighth aspect of the present invention, the refrigerant in the second heat exchanger is sufficiently heat-exchanged with the slurry of the water-absorbing gel material having a large heat capacity and high thermal conductivity.

  According to the ninth aspect of the invention, with the lid, the slurry of the water-absorbing gel substance on the outer periphery of the second heat exchanger is protected without being discharged or scattered by rain, wind or the like.

  According to the tenth aspect of the present invention, the required heating or hot water supply can be performed with the heat source obtained by the condenser.

  According to the eleventh aspect of the invention, the required cooling can be performed with the cold source obtained by the evaporator.

  According to the twelfth aspect of the present invention, floor cooling or floor heating is performed, so that a person in the room can have a comfortable atmosphere.

  According to the thirteenth aspect of the present invention, the underground buried type compression heat pump can be obtained easily and at low cost.

  Hereinafter, the embodiment shown in FIGS. 1 to 7 according to the present invention will be described.

  The compression heat pump 1 shown in FIGS. 1 to 4 cools the compressor 2 that adiabatically compresses the refrigerant, and the refrigerant that is compressed to a high temperature and high pressure by the compressor 2 and discharged from the discharge port 2a of the compressor 2. The first heat exchanger 3 or the third heat exchanger 5 to be condensed, a condensing function to cool the low-temperature and low-pressure wet refrigerant vapor obtained by adiabatic expansion of the condensed and liquefied high-pressure refrigerant, and underground heat And a second heat exchanger 4 having an evaporating function for heating. In the second heat exchanger 4, the condensed high-pressure refrigerant in the gas-liquid mixture is supercooled by underground heat and then energized. The refrigerant that has become low-temperature gas is sucked into the suction port 2b of the compressor 2 via the third heat exchanger 5 or the first heat exchanger 3.

  And in the electric motor which is not illustrated connected with the rotating shaft of the compressor 2, the rotation speed is controlled by the inverter.

  In addition, a four-way valve 7 is interposed in a pipe line 6 that connects the discharge port 2a and the suction port 2b of the compressor 2 with the refrigerant inlet / outlet port 3a of the first heat exchanger 3 and the refrigerant inlet / outlet port 5a of the third heat exchanger 5. By switching the four-way valve 7 to one or the other, the discharge port 2a of the compressor 2 is connected to the refrigerant inlet / outlet 3a of the first heat exchanger 3 or the refrigerant inlet / outlet 5a of the third heat exchanger 5. In addition, the suction port 2 b of the compressor 2 is communicated with the refrigerant inlet / outlet port 5 a of the third heat exchanger 5 or the refrigerant inlet / outlet port 3 a of the first heat exchanger 3.

  Furthermore, in the heating operation or hot water supply operation state illustrated in FIGS. 1 to 3, a pipe line 8 connecting the refrigerant inlet / outlet 3 b of the first heat exchanger 3 and the refrigerant inlet 4 a of the second heat exchanger 4, a pipe A check valve 13 is interposed between the pipe 9 and the pipe 9 in the pipe 9 and the pipe 10, and the refrigerant outlet 5b of the third heat exchanger 5 and the refrigerant outlet 4b of the second heat exchanger 4 A check valve 14 is interposed between the pipe line 11 and the pipe line 12 in the pipe line 12, and the check valve 13 is connected from the pipe line 8 to the pipe line 9. The refrigerant is allowed to pass through the pipeline 12 only to the pipeline 11 respectively.

  Furthermore, a check valve 15 is provided between the pipe 8 connecting the refrigerant inlet / outlet 3b of the first heat exchanger 3 and the refrigerant outlet 4b of the second heat exchanger 4, the pipe 8 in the pipe 12, and the pipe 12. In addition, the pipe 11 connecting the refrigerant inlet / outlet 5 b of the third heat exchanger 5 and the refrigerant inlet 4 a of the second heat exchanger 4, a non-return between the pipe 11 in the pipe 10, and the pipe 10 A valve 16 is interposed so that the check valve 15 allows the refrigerant to pass from the pipe 12 to the pipe 8 and the check valve 16 allows the refrigerant to pass only from the pipe 11 to the pipe 10.

  In a building (not shown), an indoor heat exchanger 17 is provided in a floor (not shown), and a hot water storage tank 18 is disposed at a required location.

  The outlet 17a of the indoor heat exchanger 17 is connected to the water supply port 20a of the circulation pump 20 via the pipe line 19, and the discharge port 20b of the circulation pump 20 is connected to the circulating water of the first heat exchanger 3 via the pipe line 21. Connected to the inlet 3c, the circulating water outlet 3d of the first heat exchanger 3 is connected to the inlet 17b of the indoor heat exchanger 17 via the conduit 22, the three-way valve 23, and the conduit 24, and returns to the conduit 19. A pipe header 25 is interposed, and an outgoing pipe header 26 is interposed in the pipe line 24.

  Furthermore, a hot water supply heat exchanger 27 is disposed at the bottom of the hot water storage tank 18, and a bath boiling heat exchanger 28 is disposed at the top of the hot water storage tank 18. An outlet 27 a of the hot water supply heat exchanger 27 is The pipe 29, the three-way valve 30, and the pipe 31 are connected to the suction port 32a of the circulation pump 32. The discharge port 32b of the circulation pump 32 is connected to the circulation water inlet 5c of the third heat exchanger 5 through the pipe 33. The circulating water outlet 5d of the third heat exchanger 5 is connected to the inlet 27b of the hot water supply heat exchanger 27 via a pipe 34.

  Furthermore, the outlet 28 a of the bath boiling heat exchanger 28 at the top of the hot water storage tank 18 is connected to the discharge port 36 a of the bath 36 via the conduit 35, and the inlet 36 b of the bath 36 is connected via the conduit 37. The bath boiling circulation pump 38 is connected to the suction port 38 a, and the bath boiling circulation pump 38 discharge port 38 b is connected to the bath boiling heat exchanger 28 via the pipe 39.

  The end of the water pipe 40 is connected to the bottom of the hot water storage tank 18, and the end of the hot water pipe 41 is connected to the top of the hot water storage tank 18. The hot water pipe 41 is provided with a shower 42 and a faucet 43. .

  Next, the detailed structure of the second heat exchanger 4 will be described.

  As shown in detail in FIG. 5, the second heat exchanger 4 is illustrated with respect to a cylindrical bottomed outer cylinder 50 having an outer diameter of about 10 cm and a length of 5 to 10 m, and the bottomed outer cylinder 50. A bottomed inner cylinder 51 that is arranged substantially concentrically through a spacer, etc. and whose bottom is formed by a bottom plate 52, and is in close contact with the top edges of the bottomed outer cylinder 50 and the bottomed inner cylinder 51. The second heat exchanger includes an inner space 55 of the bottomed inner cylinder 51 and a lid 53 capable of sealing the outer space 54 between the bottomed inner cylinder 51 and the bottomed outer cylinder 50. 4 is buried in the ground 0 as will be described in detail later.

  Further, as shown in FIG. 6, a ring-shaped partition plate 56 is hermetically sealed between the inner peripheral wall surface of the bottomed outer cylinder 50 and the outer peripheral wall surface of the bottomed inner cylinder 51 at the top of the outer space 54. A narrow tubular nozzle 57 that is in close contact and serves as a refrigerant passage extending downward through the partition plate 56 is oriented in the circumferential direction of the external space 54 as shown in FIGS. The part is formed in a shape inclined downward.

  Further, the inlet of the variable throttle second expansion valve 59 is connected to the upper end of the pipe 58 that passes through the center of the bottom plate 52 and extends upward in the internal space 55 and passes through the lid 53, and the variable throttle second The outlet of the expansion valve 59 is connected to the pipe 12, and the opening degree of the variable expansion second expansion valve 59 corresponds to the detection signal of the temperature sensor 60 disposed near the pipe 10 pipe 11. Opening and closing is controlled.

  Furthermore, one or a plurality of first expansion valves 61 that penetrate the bottom plate 52 and extend the internal space 55 upward are provided, and the first expansion valves 61 are wound in a coil shape.

  In addition, the lower end of the bypass pipe 62 penetrating the lid 53 is communicated with the internal space 55, and the upper end of the bypass pipe 62 is communicated with the pipe line 12.

  The external space 54 in the second heat exchanger 4 is a condenser that supercools the gas-liquid mixed high-pressure refrigerant cooled and condensed in the first heat exchanger 3 or the third heat exchanger 5 by underground heat. The internal space 55 in the second heat exchanger 4 has the function of an evaporator that adiabatically expands the refrigerant from the first expansion valve 61 into a low-temperature gas.

  In addition, the lower end of the heat pipe 63 that penetrates the bottomed outer cylinder 50 is integrally joined to the inner peripheral surface of the bottomed outer cylinder 50 (or the outer peripheral surface of the bottomed inner cylinder 51), and from the bottomed outer cylinder 50 to the outside. The exposed upper portion of the heat pipe 63 is directed obliquely upward.

  Further, a plurality of watering pipes 64 are provided on the outer peripheral surface of the bottomed outer cylinder 50 with a required gap in the vertical direction, and these watering pipes 64 are connected to an electromagnetic valve 65 installed on the ground via a water pipe 66. The water is sprayed from the sprinkling pipe 64 over the entire circumference of the bottomed outer cylinder 50 by opening the electromagnetic valve 65.

  As shown in FIGS. 1 to 4, a pit 70 having a diameter larger than that of the bottomed outer cylinder 50 of the second heat exchanger 4 is dug in the ground 0, and a second heat is formed in the center of the pit 70. In a state where the exchanger 4 is held, a water-absorbing gel substance 71 is obtained by mixing a water-absorbing substance such as charcoal with a powder having high thermal conductivity such as copper powder, and adding water to the mixture. Filled and the top of the pit 70 is covered with a concrete lid 72 having a diameter of about 60 cm.

  Since the embodiment shown in FIGS. 1 to 7 is configured as described above, when the heating operation is performed, the discharge port 2a of the compressor 2 is set as shown in FIG. The four-way valve 7 is operated to connect the refrigerant inlet / outlet 3a of the first heat exchanger 3 and the inlet 2b of the compressor 2 to the refrigerant inlet 4a of the third heat exchanger 5, and When the three-way valve 23 is switched so as to connect the pipe line 24 and the three-way valve 30 is switched so as to shut off the pipe line 19 and the pipe line 31 and the compressor 2 and the circulation pump 20 are operated, the compression is performed. The high-temperature refrigerant adiabatically pressurized in the machine 2 is guided to the first heat exchanger 3, and the refrigerant cooled by heat exchange with water in the first heat exchanger 3 becomes a high-pressure refrigerant of gas-liquid mixing. It is ejected from the nozzle 57 to the external space 54 through the pipe 8, the check valve 13, the pipe 9 and the pipe 10.

  Since the nozzle 57 is bent in the clockwise direction along the circumferential direction of the bottomed outer cylinder 50 and the bottomed inner cylinder 51 as viewed from above, and is bent downward, the high-pressure refrigerant in the gas-liquid mixture is contained in the outer space 54. Liquid refrigerant that descends while turning, exchanges heat with the water-absorbing gel substance 71 in the ground, cools and exchanges heat with the low-temperature refrigerant in the internal space 55, and further condenses and accumulates at the bottom of the external space 54 Is discharged into the internal space 55 via the first expansion valve 61, and when passing through the first expansion valve 61, the liquid refrigerant is cooled by heat exchange with the low-temperature refrigerant in the internal space 55. When it exits, it adiabatically expands to become low-temperature and low-pressure wet steam.

  The low-temperature and low-pressure wet steam in the internal space 55 rises in the internal space 55, and from the bypass pipe 62 to the pipe 12, the check valve 14, the pipe 11, the third heat exchanger 5, and the four-way valve 7 in the pipe 6. Is sent to the suction port 2b of the compressor 2 and is adiabatically pressurized again in the compressor 2.

  Then, the water in the indoor heat exchanger 17, the pipe line 19, and the return pipe header 25 flows into the first heat exchanger 3 through the pipe line 21 by the circulation pump 20, and enters the first heat exchanger 3. The water that has flowed into the chamber is heat-exchanged with the high-temperature refrigerant that is adiabatic and pressurized by the compressor 2, and the heated high-temperature water passes through the pipeline 22, the three-way valve 23, the pipeline 24, and the forward pipe header 26. The heat flows into the heat exchanger 17 and is exchanged with a floor (not shown) in the indoor heat exchanger 17 and again flows into the first heat exchanger 3 by the circulation pump 20, but the floor passes through the indoor heat exchanger 17. Heated by the passing hot water, the room (not shown) is heated with a heated floor.

  As described above, the high-pressure refrigerant mixed with gas and liquid is ejected spirally in the external space 54 from the nozzle 57, exchanges heat with the water-absorbing gel substance 71 through the bottomed outer cylinder 50, and Since heat is exchanged with the low-temperature refrigerant in the inner space 55 via the bottom inner cylinder 51, the refrigerant is sufficiently cooled in the outer space 54 to promote condensation, and the refrigerant is heated in the inner space 55. As a result of the promotion of evaporation, the power necessary to rotate the compressor 2 is saved, and the coefficient of performance of the compression heat pump 1 is improved.

  During the heating operation, when the heat radiation amount of the indoor heat exchanger 17 is insufficient, the rotation speed of the compressor 2 is increased by the inverter and the variable throttle second expansion valve 59 is opened by the temperature sensor 60. The amount of refrigerant supplied to the compressor 2 increases, and the amount of heat released from the indoor heat exchanger 17 increases.

  Furthermore, when the room is to be heated strongly, the operation of the circulation pump 32 is started after setting the three-way valve 30 so that the pipe line 29 and the pipe line 33 communicate with each other in the operation state shown in FIG. Then, as shown in FIG. 2, the hot water of the hot water supply heat exchanger 27 heated by the hot water previously heated in the hot water storage tank 18 is supplied to the circulation pump via the pipe line 29, the three-way valve 30 and the pipe line 33. The hot water sucked into 32 and discharged from the circulation pump 32 flows into the third heat exchanger 5 through the pipe line 33, and the refrigerant vapor flowing in the third heat exchanger 5 passes through the pipe 33 with the third heat. Since the refrigerant is heated by the hot water flowing into the exchanger 5 and the temperature of the refrigerant is increased, the refrigerant vapor is heated to a high temperature by the compressor 2 and is heat-exchanged with the high-temperature refrigerant in the first heat exchanger 3. The temperature of the hot water sent to the heat exchanger 17 rises, the amount of heat released from the indoor heat exchanger 17 increases, and the room is strong. It is heating to.

  Next, when it is desired to heat the water in the hot water storage tank 18 at night when the electricity rate is low, the circulation pump 20 is operated as shown in FIG. 3, but on the other hand, the operation of the circulation pump 32 is stopped. If the three-way valve 23 is set so that the pipe line 22 and the pipe line 34 communicate with each other, and if the three-way valve 30 is set so that the pipe line 19 and the pipe line 29 communicate with each other, the circulation pump 20 sets the pipe 21 The water sent to the first heat exchanger 3 through the first heat exchanger 3 is heated in the first heat exchanger 3 by exchanging heat with a high-temperature refrigerant. Instead of being sent to the exchanger 17, it is sent to the hot water supply heat exchanger 27 in the hot water storage tank 18 via the pipe line 22, the three-way valve 23, and the pipe line 34, and after heat exchange with the hot water in the hot water storage tank 18, It returns to the circulation pump 20 through the pipe line 29, the three-way valve 30, and the pipe line 19, and the hot water heated by the 1st heat exchanger 3 circulates.

  The hot water heated by the first heat exchanger 3 passes through the hot water supply heat exchanger 27 in the hot water storage tank 18 and exchanges heat with the hot water in the hot water storage tank 18 until the hot water in the hot water storage tank 18 reaches a high temperature. Heated.

  Further, when the cooling operation is to be performed, as shown in FIG. 4, the heat of the room air is transferred by the second heat exchanger 4 through the water-absorbing gel substance 71 as shown in FIG. 4. In the third heat exchanger 5, the hot water supply heat exchanger 27, the pipe line 29, and the three-way valve 30 are diffused to the ground 0 and transmitted to the refrigerant through the first heat exchanger. The water in the hot water storage tank 18 is heated by a water circuit connected by the pipe 31, the circulation pump 32, the pipe 33, the pipe 34 and the hot water supply heat exchanger 27.

  That is, the setting state of the four-way valve 7 in the heating operation or the hot water supply operation is switched, the discharge port 2a of the compressor 2 is connected to the refrigerant inlet / outlet 5a of the third heat exchanger 5, and the suction port 2b of the compressor 2 is connected. Connected to the refrigerant inlet / outlet port 3a of the first heat exchanger 3, the three-way valve 23 is switched and set so that the pipe line 22 and the pipe line 24 communicate with each other, and the pipe 29 and the pipe line 31 communicate with each other. After the valve 30 is switched and set, the circulation pump 20 and the circulation pump 32 may be operated.

  In this cooling operation state, as shown in FIG. 4, the high-temperature refrigerant adiabatically heated by the compressor 2 reaches the refrigerant inlet / outlet 5 a of the third heat exchanger 5 from the discharge port 2 a of the compressor 2. The high-temperature refrigerant communicates with the pipe 29, the three-way valve 30, the pipe 31, the circulation pump 32, the pipe 33, the third heat exchanger 5, and the pipe 34 that communicate with the hot water supply heat exchanger 27 of the hot water storage tank 18. Heat is exchanged with the hot water in the hot water circuit in the third heat exchanger 5 to cool and condense, and the gas-liquid mixed refrigerant passes through the nozzle 57 through the pipe 11, the check valve 16, and the pipe 10. The outer space 54 descends while spirally turning, and is further cooled and condensed by heat exchange with the water-absorbing gel substance 71 outside the bottomed outer cylinder 50 and the low-temperature refrigerant in the inner space 55, and is then condensed in the outer space 54. Accumulate at the bottom.

  The refrigerant stored in the external space 54 is cooled by the low-temperature refrigerant vapor in the internal space 55 while passing through the first expansion valve 61, and then discharged from the upper end of the first expansion valve 61 to adiabatic expansion. The low-temperature refrigerant vapor flows into the first heat exchanger 3 through the bypass pipe 62, the pipe line 12, the check valve 15, and the pipe line 8. The low-temperature refrigerant is supplied from the circulating water outlet 3d of the first heat exchanger 3 to the pipe 22, the three-way valve 23, the pipe 24, the outgoing pipe header 26, the indoor heat exchanger 17, the pipe 19, the return pipe header 25, the circulation Heat is exchanged with the water in the water circuit leading to 3e of the first heat exchanger 3 through the pump 20 and the pipe line 21, and from the refrigerant inlet / outlet 3a of the first heat exchanger 3 through the pipe line 6 and the four-way valve 7. And returned to the suction port 2b of the compressor 2.

  In the second heat exchanger 4, the refrigerant cooled to a low temperature and the water cooled by the heat exchange in the first heat exchanger 3 circulate in the water circuit, and this cooling water is the indoor heat exchanger 17. Then, heat is exchanged with room air through a floor (not shown) to cool the room air.

  Moreover, since the electromagnetic valve 65 is opened and the tap water that has reached the sprinkling pipe 64 from the water pipe 66 is sprinkled from the sprinkling pipe 64 to the water-absorbing gel substance 71, the water-absorbing gel substance 71 is sufficiently cooled.

  Furthermore, since the water-absorbing gel substance 71 contains a lot of moisture, its heat conductivity is good, so that heat is well transferred to the ground 0, and the second heat exchanger 4 is sufficiently cooled.

  Furthermore, one end of the heat pipe 63 is exposed in the outer space 54 and is integrally joined to the bottomed outer cylinder 50, and the other end of the heat pipe 63 protrudes into the water-absorbing gel substance 71. The heat in the external space 54 is well transmitted to the water-absorbing gel substance 71.

  In the second heat exchanger 4 of the embodiment of FIGS. 1 to 7, the tube 58 penetrates the lid 53 upward, but the second heat exchanger 4 may be configured as shown in FIG. .

  In the second heat exchanger 4 shown in FIG. 8, the top end of the pipe 58 opens near the top of the internal space 55, and even if the variable throttle second expansion valve 59 is provided in this opening, the second heat exchanger shown in FIG. The same effect as the exchanger 4 can be obtained.

  Next, an embodiment of a method for embedding the bottomed outer cylinder 50 in the ground 0 will be described.

  As shown in FIG. 9, the heat radiation fin spirally wound around the outer peripheral surface of the cylindrical bottomed outer cylinder 50 of the second heat exchanger 4 from the upper end to the lower end of the bottomed outer cylinder 50. The inner peripheral edge of 67 is integrally fixed by welding or the like, and a slurry supply pipe having a lower end (not shown) opened along the inner peripheral edge of the heat radiating fin 67 is integrally attached. When the bottomed outer cylinder 50 is swung clockwise as viewed from above while supplying the slurry of the substance 71, the bottomed outer cylinder 50 is screwed into the underground 0 and the bottomed inside the underground 0 Since the water-absorbing gel substance 71 is filled in the outer periphery of the outer cylinder 50, the operation of burying the second heat exchanger 4 in the ground 0 can be easily performed within a short time.

It is drawing which illustrated the heating operation state in the compression heat pump which concerns on this invention. It is drawing which illustrated the powerful heating operation state of the compression heat pump in FIG. It is drawing which illustrated the deep hot-water supply driving | running state of the compression heat pump in FIG. 2 is a diagram illustrating a cooling operation state of the compression heat pump in FIG. 1. It is a longitudinal drawing of the 3rd heat exchanger which integrated the condenser and evaporator in the said compression heat pump. It is a principal part enlarged plan view of the 3rd heat exchanger of FIG. FIG. 7 is a view taken along arrow VI in FIG. 6. It is a longitudinal cross-sectional view of the 3rd heat exchanger in other embodiment. It is a front view of this heat exchanger used in the underground embedding method of the 2nd heat exchanger of the compression heat pump concerning the present invention.

Explanation of symbols

0 ... Underground, 1 ... Compression heat pump,
2 ... compressor, 2a ... discharge port, 2b ... suction port,
3 ... 1st heat exchanger, 3a ... Refrigerant inlet / outlet, 3b ... Refrigerant inlet / outlet, 3c ... Circulating water inlet, 3d ... Circulating water outlet,
4 ... 2nd heat exchanger, 4a ... refrigerant inlet, 4b ... refrigerant outlet 5 ... 3rd heat exchanger, 5a ... refrigerant inlet, 5b ... refrigerant inlet, 5c ... circulating water inlet, 5d ... circulating water outlet,
6 ... Pipe line, 7 ... Four-way valve, 8 ... Pipe line, 9 ... Pipe line, 10 ... Pipe line, 11 ... Pipe line, 12 ... Pipe line,
13 ... Check valve, 14 ... Check valve, 15 ... Check valve, 16 ... Check valve,
17 ... Indoor heat exchanger, 17a ... Outlet, 17b ... Inlet,
18 ... Hot water storage tank, 19 ... Pipe line,
20 ... circulation pump, 20a ... suction port, 20b ... discharge port,
21 ... Pipe line, 22 ... Pipe line, 23 ... Three-way valve, 24 ... Pipe line, 25 ... Return pipe header, 26 ... Out pipe header,
27 ... Hot-water heat exchanger, 27a ... Exit, 27b ... Inlet,
28 ... bath heat exchanger, 28a ... exit, 28b ... inlet,
29 ... pipeline, 30 ... three-way valve, 31 ... pipeline,
32 ... circulation pump, 32a ... suction port, 32b ... discharge port,
33 ... Pipe line, 34 ... Pipe line, 35 ... Pipe line, 36 ... Bath, 36a ... Discharge port, 36b ... Suction port
37 ... Pipe line, 38 ... Bath boiling circulation pump, 38a ... Suction port, 38b ... Discharge port,
39 ... Pipe line, 40 ... Water pipe, 41 ... Hot water pipe, 42 ... Shower, 43 ... Faucet,
50 ... Bottomed outer cylinder, 51 ... Bottomed inner cylinder, 52 ... Bottom plate, 53 ... Lid, 54 ... External space, 55 ... Internal space,
56 ... Partition plate, 57 ... Nozzle, 58 ... Pipe, 59 ... Variable expansion second expansion valve, 60 ... Temperature sensor,
61 ... 1st expansion valve, 62 ... Bypass pipe, 63 ... Heat pipe, 64 ... Sprinkling pipe, 65 ... Solenoid valve,
66 ... Water pipe, 67 ... Heat radiation fin
70… Hot hole, 71… Water-absorbing gel substance, 72… Concrete lid.

Claims (13)

In a compression heat pump configured by sequentially connecting a discharge port of a compressor, a condenser, an evaporator, and a suction port of the compressor,
In the refrigerant circuit of the compression heat pump, first, second, and third heat exchangers are arranged in series,
In the second heat exchanger in the middle of the three, the condenser and the evaporator are integrated,
The second heat exchanger includes an inner sealed container and an outer sealed container that seals the outer periphery of the inner sealed container with a predetermined gap, and is a condenser sealed by the inner sealed container and the outer sealed container. Partitioned into an outer space having the function of and an inner space having the function of the second heat exchanger in the inner sealed container,
A refrigerant passage for guiding the refrigerant condensed by the compressor to the outer space of the second heat exchanger;
A first expansion valve for guiding the refrigerant in the outer space of the second heat exchanger to the inner space;
A variable throttle second expansion valve for guiding the refrigerant in the outer space of the second heat exchanger to a portion connected to the suction port of the compressor;
An internal space of the second heat exchanger is connected to a suction port of the compressor.
The compression heat pump according to claim 1, wherein the second heat exchanger is embedded in the ground.
The variable throttle second expansion valve is disposed above the second heat exchanger or at the top of the inner space, and is connected to the suction side of the compressor from the inner space of the second heat exchanger. The compression heat pump according to claim 1 or 2, wherein the compression heat pump is provided in parallel with the heat pump.
The first expansion valve is constituted by a thin tube, penetrates the bottom wall portion of the inner sealed container, the lower end of the first expansion valve opens into the outer space, and the upper end of the first expansion valve 4. The compression heat pump according to claim 1, wherein the compression heat pump is opened in the inner space and is wound in a coil shape in the inner space.
The compression type heat pump according to any one of claims 1 to 4, wherein the variable expansion second expansion valve is automatically controlled in accordance with a heat load of the compression type heat pump.
An inner end portion of the heat pipe penetrating the outer sealed container of the second heat exchanger is integrally joined to an inner surface of the outer sealed container or an outer surface of the inner sealed container, and the outer end portion of the heat pipe is 6. The compression heat pump according to claim 2, wherein the compression heat pump is exposed to the outside of the heat exchanger.
The compression heat pump according to any one of claims 2 to 6, wherein an underground sprinkling nozzle is provided on an outer peripheral portion of the second heat exchanger.
The compression heat pump according to claim 2 or 7, wherein the outside of the second heat exchanger is coated with a slurry of a water-absorbing gel substance having a high thermal conductivity.
The compression heat pump according to claim 8, wherein the slurry of the water-absorbing gel substance is covered with a lid.
The compression according to any one of claims 1 to 9, wherein the compressor is used as a heating device or a hot water supply device using a heat exchanger connected to a discharge port of the compressor as a condenser and using the condenser as a heat source. Type heat pump.
A heat exchanger connected from the second heat exchanger to the suction port of the compressor serves as an evaporator,
The compression heat pump according to any one of claims 1 to 9, wherein the compression heat pump is used as a cooling device using the evaporator as a cold source.
12. The compression heat pump according to claim 1, wherein the fluid that exchanges heat with the refrigerant through the heat exchanger is a liquid and is used in a floor cooling / heating device. .
A method of embedding the second heat exchanger of the compression heat pump according to claim 8 in the ground,
Forming an outer sealed container of the second heat exchanger in a cylindrical shape;
A spiral fin is integrally provided on the outer peripheral surface of the cylindrical outer sealed container, and the cylindrical outer sealed container is swung downward while swirling along the downward inclined direction of the spiral fin. A method for embedding a compression heat pump in the ground, wherein the second heat exchanger is buried in the ground.

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