JP2016153700A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner that can enhance heat transfer efficiency to thermal storage heat exchange pipes and thus enhance defrosting effects.SOLUTION: An air conditioner includes a thermal storage device 35 for storing heat from a compressor 6. The thermal storage device includes: a thermal storage medium 36 arranged on the outer periphery of the compressor; and thermal storage heat exchange pipes 37 penetrated through the thermal storage medium. The thermal storage medium is made of an aluminum block and is configured to have a heater 41 embedded therein. The heater 41 is provided so that the thermal storage heat exchange pipes 37 are located between the heater 41 and the outer periphery of the compressor 6. Thus, even in cold winder, etc. that causes shortage of heat quantity required for defrosting, the thermal storage medium is replenished with heat from the heater so as to efficiently continue supply of heat to a refrigerant in the thermal storage heat exchange pipes via the thermal storage medium. Since heat is supplied from the outer periphery of the compressor and the heater to the heat exchange pipes, the heat exchange pipes can be heated efficiently, so as to improve defrosting effects.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an air conditioner including a heat storage device.

  Conventionally, when the outdoor heat exchanger is frosted during the heating operation by the heat pump air conditioner, defrosting is performed by switching the four-way valve from the heating cycle to the cooling cycle. In this defrosting method, although the indoor fan is stopped, there is a disadvantage that a feeling of heating is lost because cold air is gradually discharged from the indoor unit.

  Therefore, a heat storage device is provided in the compressor provided in the outdoor unit, and defrosting is performed using waste heat of the compressor stored in the heat storage material of the heat storage device during heating operation. (For example, refer to Patent Document 1).

  However, in the conventional heat storage device, since the heat storage material is a liquid material, the heat capacity is high. On the other hand, when the stored heat amount is taken out by the heat storage heat exchanger, the heat from the liquid heat storage material to the metal heat storage heat exchanger is reduced. The movement has a large thermal resistance and has a problem that heat cannot be taken out in a short time.

  Therefore, the applicant further studied, and by configuring the heat storage material with a metal, particularly an aluminum lump with good thermal conductivity, the heat stored in the heat storage material can be efficiently and quickly transferred to the heat storage heat exchanger. The thing which made it possible is proposed (for example, refer patent document 2).

  FIG. 12 shows a heat storage device described in Patent Document 2. This heat storage device 100 forms a heat storage material 102 mounted and fixed on the outer periphery of the compressor 101 in an aluminum lump, and heat storage heat exchange in which refrigerant flows through the aluminum heat storage material 102. The pipe 103 is press-fitted.

  According to the heat storage device 100, the aluminum heat storage material 102 that conducts heat to the pipe 103 of the heat storage heat exchanger is a metal lump, and the metal is aluminum having good heat conductivity. Heat conduction to the pipe 103 of the heat storage heat exchanger is performed quickly and efficiently.

JP-A-3-31666 JP 2013-120030 A

  As described above, in the heat storage device described in Patent Document 2, heat conduction between the aluminum heat storage material 102 and the pipe 103 of the heat storage heat exchanger is performed efficiently and quickly, and the heat stored in the aluminum heat storage material 102 is stored. Can be used efficiently. However, the heat storage material 102 made of aluminum has a smaller specific heat than the heat storage material made of a liquid material. For this reason, there is a problem that the amount of heat that can be stored and retained in the aluminum heat storage material 102 itself is small, for example, the amount of heat is insufficient at the time of defrosting such as during severe cold.

In particular, when the heat storage device 100 is formed by forming a hole for heat exchange pipe in the aluminum heat storage material 102 and penetrating the pipe 103 of the heat storage heat exchanger here, this heat exchange device 100 is used. There is a problem that a gap may be formed between the pipe hole and the pipe 103 of the heat storage heat exchanger, the heat conduction between the two is also deteriorated, and the above-described effect of insufficient heat is likely to occur.

  As a result, there is still room for improvement as compared with the case of a heat storage material made of a liquid material.

  The present invention has been made in view of such points, and an air conditioner with a heat storage device that can efficiently conduct heat to a pipe of a heat storage heat exchanger without causing a shortage of heat even in severe cold conditions or the like. It is intended to provide.

  In order to achieve the above object, an air conditioner of the present invention includes a compressor and a heat storage device that stores heat from the compressor, and the heat storage device includes a heat storage material disposed on an outer periphery of the compressor, and A heat storage heat exchange pipe that penetrates the heat storage material and transfers the amount of heat stored in the heat storage material to the refrigerant flowing inside, and the heat storage material is formed of an aluminum lump and embedded with a heater; and The heater is configured such that the heat storage heat exchange pipe is provided between the heater and the outer periphery of the compressor.

  As a result, even when the amount of heat necessary for defrosting is extremely cold or the like, the heat storage material is supplemented with heat from the heater, and the heat is continuously supplied to the refrigerant in the heat storage heat exchange pipe via the heat storage material. Can do. Moreover, since the heat exchange pipe is located between the outer periphery of the compressor and the heater, heat can be supplied from both the inner and outer sides, that is, from the outer periphery of the compressor and the heater, so that efficient heat supply can be achieved. .

  According to the present invention, it is possible to efficiently conduct heat to the refrigerant in the heat storage heat exchange pipe without causing a shortage of heat even in severe cold, and it is possible to provide an air conditioner with a high defrosting effect. .

The block diagram of the air conditioner provided with the refrigeration cycle apparatus which concerns on Embodiment 1 of this invention. Schematic showing the refrigerant flow during normal heating in the refrigeration cycle apparatus of the same air conditioner Schematic diagram showing the refrigerant flow during defrosting and heating in the refrigeration cycle apparatus of the same air conditioner The flowchart which shows the procedure which starts the defrost and heating operation in the refrigeration cycle apparatus of the air conditioner Front view showing a state in which a heat storage device is mounted on the compressor of the air conditioner The perspective view which shows the state which mounted | wore the heat storage apparatus with the compressor of the air conditioner The top view which shows the state which mounted | wore the heat storage apparatus with the compressor of the air conditioner The perspective view which looked at the heat storage device of the air conditioner from the outside The perspective view which looked at the heat storage device of the air conditioner from the inside Plan view of the heat storage device of the air conditioner The top view of the planar endplate located in the upper end surface of the thermal storage material which makes the main body of the thermal storage apparatus of the air conditioner A perspective view of a heat storage device in a conventional air conditioner

An air conditioner according to a first aspect of the present invention includes a compressor and a heat storage device that stores heat from the compressor, and the heat storage device is provided through the heat storage material disposed on the outer periphery of the compressor and the heat storage material. A heat storage heat exchange pipe that transfers heat stored in the heat storage material to the refrigerant flowing inside, the heat storage material is formed of an aluminum lump and a heater is embedded, and the heater is configured to store the heat storage The heat exchange pipe is provided so as to be positioned between the heater and the outer periphery of the compressor.

  As a result, even when the amount of heat necessary for defrosting is extremely cold or the like, the heat storage material is supplemented with heat from the heater, and the heat is continuously supplied to the refrigerant in the heat storage heat exchange pipe via the heat storage material. Can do. Moreover, since the heat exchange pipe is located between the outer periphery of the compressor and the heater, heat can be supplied from both the inner and outer sides, that is, from the outer periphery of the compressor and the heater, so that efficient heat supply can be achieved. . As a result, the defrosting effect can be increased.

  The air conditioner according to a second aspect of the present invention is the air conditioner according to the first aspect, further comprising a heat storage material mounting band for fixing the heat storage material to an outer periphery of the compressor while the heat storage material has flange portions on both sides thereof. The material attachment band includes an engagement portion at one end and a screw fixing portion at the other end, and engages the engagement portion of the heat storage material attachment band with one of the flange portions of the heat storage material, and a screw fixing portion at the other end. Is fixed to the other flange portion of the heat storage material by screwing the heat storage material to the compressor outer peripheral surface.

  As a result, the heat storage material can be securely adhered and fixed to the outer periphery of the compressor, the amount of heat transfer from the compressor to the heat storage material is increased, and the heat storage material is brought into contact with the outer peripheral surface of the compressor by the amount of the flange portion. The area is increased and the amount of heat transfer from the outer periphery of the compressor is further increased. As a result, the amount of heat transferred from the compressor to the heat storage material increases, making it difficult for the heat storage material to cause a shortage of heat, thereby reducing the heat supply by energizing the heater and promoting energy saving. it can.

  The air conditioner according to a third aspect of the present invention is the air conditioner according to the first or second aspect, wherein the heat storage material bends the heater in a substantially U shape to form a recess in a portion between the substantially U-shaped portions. A temperature sensor for controlling energization to the heater is provided in the recess.

  As a result, since the recess provided in the portion between the substantially U-shaped portions of the heat storage material is thin and has a small heat capacity, it approximates the temperature of the heater of the heat storage material and the heat storage heat exchange pipe embedded portion, and the accuracy of heater control Can be improved, and it can be made highly safe without excessive rise due to a delay in temperature detection.

  The air conditioner according to a fourth aspect of the present invention is the air conditioner according to the third aspect, wherein the recess is provided in the vertical direction together with the heater, and at least the upper part thereof is opened so that the lead wire of the temperature sensor is drawn from the open part.

  Thereby, it is possible to detect the temperature of the recess wall portion where the temperature sensor is installed by preventing the hot air from being accumulated in the recess space, and to further improve the heater control accuracy and safety. . Further, the temperature sensor lead wire can be pulled out by utilizing the open portion at the upper part of the recess, and it is not necessary to perform post-processing such as drilling a lead wire through hole, thereby reducing the cost accordingly.

  An air conditioner according to a fifth aspect of the present invention is the air conditioner according to the fourth aspect of the present invention, wherein the recess is further provided with a thermal fuse that physically cuts off power to the heater.

  As a result, even if the temperature sensor breaks down and stops functioning, it is possible to reliably cut off the power to the heater, and even a heat storage device constructed by integrating the heater embedded in an aluminum heat storage material can be safely ensured. Sexuality can be secured.

  The air conditioner according to a sixth aspect of the present invention is the air conditioner according to any one of the first to fifth aspects, wherein the heat storage material is formed by a molded product, and a planar end plate having substantially the same shape as the heat storage material end surface is provided on either upper or lower end surface thereof. It is as a configuration provided.

  As a result, the heat storage material, the heat storage heat exchange pipe and the heater are integrated so that there is no gap between them, and the heat conduction between them is improved and the heat storage heat is more efficient. Heat conduction to the exchange pipe is possible. Moreover, a heat storage material in which a heat storage heat exchange pipe and a heater are embedded and integrated can be manufactured using an inexpensive sand mold, and even if it is a sand mold, the heat storage heat exchange pipe and heater can be installed without a special structure. It can hold | maintain reliably by the planar end plate of a thermal storage material end surface, The manufacturing cost can also be reduced significantly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration of an air conditioner including a refrigeration cycle apparatus according to Embodiment 1 of the present invention, and the air conditioner 1 is composed of an outdoor unit 2 and an indoor unit 4 that are connected to each other through a refrigerant pipe. ing.

  As shown in FIG. 1, a compressor 6, a four-way valve 8, a strainer 10, an expansion valve 12, and an outdoor heat exchanger 14 are provided inside the outdoor unit 2. An exchanger 16 is provided, and these are connected to each other via a refrigerant pipe to constitute a refrigeration cycle.

  More specifically, the compressor 6 and the indoor heat exchanger 16 are connected via a first pipe 18 provided with a four-way valve 8, and the indoor heat exchanger 16 and the expansion valve 12 are provided with a strainer 10. Two pipes 20 are connected. The expansion valve 12 and the outdoor heat exchanger 14 are connected via a third pipe 22, and the outdoor heat exchanger 14 and the compressor 6 are connected via a fourth pipe 24 and a fifth pipe 25, and outdoor heat exchange is performed. A four-way valve 8 is arranged between the fourth pipe 24 and the fifth pipe 25 connecting the compressor 14 and the compressor 6. A three-way valve (switching device) 23 is connected between the four-way valve 8 and the outdoor heat exchanger 14 via a fourth pipe 24. Further, the fifth pipe 25 on the compressor refrigerant suction side is provided with an accumulator 26 for separating the liquid phase refrigerant and the gas phase refrigerant. The third pipe 22 connecting the outdoor heat exchanger 14 and the indoor heat exchanger 16 is connected to the compressor 6 via a sixth pipe (discharge gas bypass mechanism) 28. A solenoid valve (discharge gas bypass mechanism) 30 is provided.

  Further, a heat storage device 35 is provided on the outer periphery of the compressor 6. The heat storage device 35, which will be described in detail later, has a heat storage material 36 that stores heat of the compressor 6 and a heat storage material that penetrates the heat storage material 36. It consists of a heat exchange pipe 37 and a heater 41, and heat stored in the heat storage material 36 is transferred to the refrigerant in the heat storage heat exchange pipe 37.

  The three-way valve 23 and the heat storage heat exchange pipe 37 are connected via a seventh pipe 29 including a capillary tube (throttle mechanism) 31, and the fifth pipe 25 connecting the four-way valve 8 and the compressor 6 is the eighth. A heat storage heat exchange pipe 37 is connected via a pipe 32.

In addition to the indoor heat exchanger 16, an air blower fan (not shown), upper and lower blades (not shown), and left and right blades (not shown) are provided inside the indoor unit 4, and indoor heat exchange is performed. The unit 16 exchanges heat between the indoor air sucked into the interior of the indoor unit 4 by the blower fan and the refrigerant flowing through the interior of the indoor heat exchanger 16, and blows out the air warmed by heat exchange into the room during heating. On the other hand, air cooled by heat exchange is blown into the room during cooling. The upper and lower blades change the direction of air blown from the indoor unit 4 up and down as necessary, and the left and right blades change the direction of air blown from the indoor unit 4 to right and left as needed.

  The compressor 6, the blower fan, the upper and lower blades, the left and right blades, the four-way valve 8, the expansion valve 12, the electromagnetic valve 30, the three-way valve 23, the heater 41, and the like are electrically connected to a control device (not shown, for example, a microcomputer). And controlled and operated by the control device.

  The operation of the refrigeration cycle apparatus configured as described above will be described along with the flow of the refrigerant, taking the heating operation of FIG. 2 as an example.

  As shown by the arrow in FIG. 2, the refrigerant discharged from the discharge port of the compressor 6 reaches the indoor heat exchanger 16 from the four-way valve 8 through the first pipe 18. The refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 passes through the second pipe 20 through the indoor heat exchanger 16, expands through the strainer 10 that prevents foreign matter from entering the expansion valve 12. To valve 12. The refrigerant decompressed by the expansion valve 12 reaches the outdoor heat exchanger 14 through the third pipe 22, and the refrigerant evaporated by exchanging heat with the outdoor air in the outdoor heat exchanger 14 is the fourth pipe 24 and the three-way valve 23. And the four-way valve 8, the fifth pipe 25, and the accumulator 26, and then returns to the compressor 6 through the suction port of the compressor 6.

  The sixth pipe 28 branched from the discharge port of the compressor 6 of the first pipe 18 and the four-way valve 8 is connected between the expansion valve 12 of the third pipe 22 and the outdoor heat exchanger 14 via the electromagnetic valve 30. Have joined.

  One side of the three-way valve 23 is connected to the fourth pipe 24 leading to the outdoor heat exchanger 14, the other side is connected to the fifth pipe 25 via the four-way valve 8, and the other side is connected to the three-way valve 23 and the heat storage heat. The control pipe is connected to a seventh pipe 29 that connects to the exchange pipe 37, and the controller guides the refrigerant from the outdoor heat exchanger 14 to the four-way valve 8 through the fourth pipe 24, and the outdoor heat exchanger 14 It is possible to switch the path through which the refrigerant is guided to the suction port of the compressor 6 through the heat storage heat exchange pipe 37 through the seven piping 29.

  During normal heating operation, the solenoid valve 30 is controlled to be closed, and the refrigerant discharged from the discharge port of the compressor 6 as described above passes through the first pipe 18 and reaches the indoor heat exchanger 16 from the four-way valve 8. . The refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 exits the indoor heat exchanger 16, passes through the second pipe 20, reaches the expansion valve 12, and the refrigerant decompressed by the expansion valve 12 is the third refrigerant. It reaches the outdoor heat exchanger 14 through the pipe 22. During normal heating operation, the three-way valve 23 is controlled to be a path for leading the refrigerant from the outdoor heat exchanger 14 to the four-way valve 8, and the refrigerant evaporated by exchanging heat with outdoor air in the outdoor heat exchanger 14 is Then, the fourth pipe 24 is passed to the four-way valve 8. Thereafter, the refrigerant that has passed through the four-way valve 8 passes through the fifth pipe 25 and returns to the suction port of the compressor 6.

  Further, the heat generated in the compressor 6 is stored in the heat storage material 36 of the heat storage device 35 from the outer wall of the compressor 6.

  Next, the operation during defrosting / heating will be described with reference to FIG. In the figure, the solid line arrows indicate the flow of the refrigerant used for heating, and the broken line arrows indicate the flow of the refrigerant used for defrosting.

  When the outdoor heat exchanger 14 is frosted during the above-described normal heating operation and the frosted frost grows, the ventilation resistance of the outdoor heat exchanger 14 increases and the air flow decreases, and the evaporation in the outdoor heat exchanger 14 increases. The temperature drops. As shown in FIG. 3, the air conditioner according to the present invention is provided with a pipe temperature sensor 15 that detects the pipe temperature of the outdoor heat exchanger 14, and the evaporation temperature is lower than that during non-frosting. When this is detected by the pipe temperature sensor 15, an instruction to switch from the normal heating operation to the defrosting / heating operation is output from the control device.

The procedure for starting the defrosting / heating operation will be described with reference to the flowchart shown in FIG. In addition, each step in the flowchart of FIG. 4 is implemented when each component of the refrigeration cycle apparatus is controlled and operated by the control device.

  First, in step S1 of the flowchart of FIG. 4, it is determined by the control device whether it is necessary to perform a defrosting operation (defrosting / heating operation) of the outdoor heat exchanger 14. Specifically, when the pipe temperature (evaporation temperature) of the outdoor heat exchanger 14 is detected by the pipe temperature sensor 15 and the detected temperature falls below a predetermined temperature set in advance, the control device performs defrosting / heating. Judged that driving is necessary.

  If it is determined in step S1 that the defrosting / heating operation needs to be performed, in step S2, the heat storage amount of the heat storage material 36 of the heat storage device 35 is insufficient for the heat amount necessary for performing the defrosting operation. It is judged by the control apparatus whether it is not. Specifically, the temperature of the heat storage material 36 is detected by a temperature sensor 42 described later, and the amount of heat accumulated in the heat storage material 36 (heat storage amount) is calculated based on this detected temperature. Further, in the control device, information on the amount of heat necessary for carrying out the defrosting operation is stored, and the amount of heat stored and the amount of heat necessary for carrying out the defrosting operation are compared to calculate the insufficient amount of heat, The heating temperature of the heat storage material 36 for supplementing the shortage of heat is set.

  In the control device, instead of calculating the amount of heat in this way, the detected temperature of the heat storage material 36 is compared with a preset temperature at which the amount of heat necessary for performing the defrosting operation can be secured. By doing so, you may make it determine the heating temperature of the thermal storage material 36. FIG.

  If it is determined in step S2 that the heat storage amount of the heat storage material 36 is insufficient, the heater 41 is operated to heat the heat storage material 36 in step S3. During the execution of the heating operation, the temperature of the heat storage material 36 is detected by the temperature sensor 42, and the heating operation by the heater 41 is continued until the heating temperature set by the control device is reached (step S4).

  Thereafter, when it is confirmed in step S4 that the temperature of the heat storage material 36 has reached the set temperature, the defrosting / heating operation is started in step S5, and the heat accumulated in the heat storage material 36 is being used. The outdoor heat exchanger 14 is defrosted by the gas-phase refrigerant discharged from the discharge port of the compressor 6. The heater 41 is stopped when the defrosting / heating operation is started, but the heater 41 may be operated when further heating of the heat storage material 36 is necessary.

  If it is determined in step S2 that the amount of heat necessary for performing the defrosting operation is accumulated in the heat storage material 36, the defrosting / heating in step S5 is performed without performing the heating operation of the heater 41. Driving is performed. In addition, each step in the flowchart of FIG. 4 is implemented when each component of the refrigeration cycle apparatus is controlled and operated by the control device.

  When the normal heating operation is shifted to the defrosting / heating operation, the solenoid valve 30 is controlled to open, and in addition to the refrigerant flow during the normal heating operation described above, a part of the gas-phase refrigerant discharged from the discharge port of the compressor 6 is The refrigerant passes through the sixth pipe 28 and the electromagnetic valve 30 and merges with the refrigerant passing through the third pipe 22 to heat the outdoor heat exchanger 14 to perform defrosting. And after condensing and making it into a liquid phase, it reaches the three-way valve 23.

  During the defrosting / heating operation, the three-way valve 23 is controlled so that the path leading the refrigerant from the outdoor heat exchanger 14 to the heat storage heat exchange pipe 37, that is, the fourth pipe 24 and the seventh pipe 29 communicate with each other. The refrigerant passing through the three-way valve 23 is depressurized by the capillary tube 31 to become low temperature, absorbs the heat of the heat storage material 36 through the heat storage heat exchange pipe 37, reaches the accumulator 26 in the gas phase or high quality state, and reaches the compressor 6. Return to inlet.

  The defrosting is performed by heating the outdoor heat exchanger 14 with a refrigerant in which a gas phase refrigerant discharged from the discharge port of the compressor 6 and a liquid phase or a gas-liquid two-phase refrigerant returning from the indoor heat exchanger 16 are mixed. When the frost melts near zero and the frost melts, the temperature of the outdoor heat exchanger 14 begins to rise again. When the temperature rise of the outdoor heat exchanger 14 is detected by the pipe temperature sensor 15, it is determined that the defrosting is completed, and an instruction to switch from the defrosting / heating operation to the normal heating operation is output from the control device.

  The configuration of the heat storage device 35 attached to the compressor 6 of the refrigeration cycle apparatus operating as described above will be described in detail below with reference to FIGS.

  5 is a front view showing a state in which the heat storage device 35 is mounted on the compressor according to the present embodiment, FIG. 6 is a perspective view thereof, FIG. 7 is a plan view thereof, and FIG. 8 is a perspective view of the heat exchange device viewed from the outside. FIG. 9 is a perspective view of the heat exchanger as viewed from the inside, FIG. 10 is a plan view of the heat storage device, and FIG. 11 is a plan view of an end plate located on the upper end surface of the heat storage material forming the main body of the heat storage device. It is a top view.

  As described above, the heat storage device 35 in the present embodiment includes the heat storage material 36 and the heat storage heat exchange pipe 37, and is disposed in close contact with a part of the outer periphery of the compressor 6.

  The heat storage material 36 is formed of aluminum lumps, and its inner peripheral surface is formed in a substantially arc shape along the outer peripheral surface of the compressor 6, and the outer peripheral surface is provided with a recess 38 in the substantially central vertical direction. It is set as the structure which became the protruding convex part 39 which both outer peripheral parts protrude outward. Further, flange portions 40 are provided on both side portions of the heat storage material 36 so as to be bent in an approximately L shape over the entire length in the vertical direction. At least one of the two flange portions 40 on both sides is provided such that a surface facing the compressor 6 protrudes along the outer periphery of the compressor 6.

  Further, the heat storage material 36 is embedded and integrated in the vertical direction in a state where the heat storage heat exchange pipe 37 described above is bent in a substantially W shape (see FIG. 9) at a portion near the inner peripheral surface inside the raised convex portion 39. It is. Further, a heater 41 made of a sheathed heater or the like bent in a substantially U shape (see FIG. 8) is formed along the heat storage heat exchange pipe 37 on the raised convex portion 39 of the outer portion of the heat storage heat exchange pipe 37. It is buried and integrated. That is, the heater 41 is integrated with the heat storage material 36 so that the heat storage heat exchange pipe 37 is positioned between the heater 41 and the outer peripheral surface of the compressor 6.

  The recess 38 is located between the substantially U-shaped portions of the heater 41. The lower portion of the heater 41 near the U-shaped bent portion is energized and controlled. A temperature sensor 42 is attached to maintain the temperature of the heat storage material 36 within a substantially constant range.

  Further, a thermal fuse 43 is mounted on the temperature sensor 42 of the recess 38 to physically cut off the power supply to the heater 41 when the heat storage material 36 reaches a predetermined temperature or higher. More specifically, the thermal fuse 43 is formed by joining two lead wires with a fusible body. When the ambient temperature rises, the fusible body reaches a melting point and melts, so that the two lead wires are physically connected. It is divided and the electrical connection is cut.

  In addition, although the said temperature sensor 42 and the temperature fuse 43 illustrated what has arrange | positioned the temperature fuse 43 on the upper part of the temperature sensor 42, you may arrange | position conversely. Two temperature fuses 43 may be provided to provide a double safety configuration.

  The recess 38 has an open upper portion, and lead wires 44 connected to the temperature sensor 42 and the temperature fuse 43 are drawn out to a control device (not shown) through the open portion.

The heat storage material 36 is in close contact with the compressor 6 in the lateral direction, and the upper and lower portions thereof are fixed to the outer peripheral surface of the compressor 6 by a heat storage material mounting band 45.

  The heat storage material mounting band 45 includes an engagement portion 46 (see FIG. 7) at one end and a screw stopper 47 (see FIG. 7) at the other end, and the engagement portion 46 is one of the flange portions 40 of the heat storage material 36. The other end of the heat retaining material 36 is screwed to the other flange portion 40 and tightened to fix the heat storing material 36 to the outer peripheral surface of the compressor.

  In addition, the heat storage material 36 is formed of an aluminum die-cast product in this embodiment, and has a shape in which a heat storage heat exchange pipe 37 and a heater 41 are integrally embedded. In this embodiment, a planar end plate 48 (see FIG. 11) having substantially the same shape as the end face of the heat storage material is provided on one of the upper and lower end surfaces, in this embodiment. The planar end plate 48 is made of, for example, a metal material having a lower thermal conductivity than aluminum constituting the heat storage material 36.

  The planar end plate 48 may be provided on the lower end surface side of the heat storage material 36 when the lower portion of the heat storage heat exchange pipe 37 and the heater 41 protrudes from the lower end surface of the heat storage material 36. Is.

  About the heat storage apparatus 35 comprised as mentioned above, the effect | action and effect are demonstrated below.

  First, the heat storage material 36 of the heat storage device 35 is formed of a metal lump, and since the metal is aluminum, heat from the compressor 6 can be easily transferred to the refrigerant, and the heat storage heat exchange pipe 37 can be transferred quickly and efficiently. Heat can be transferred to the refrigerant.

  In addition, in the heat storage device 35 of the present invention, since the heater 41 is provided in the heat storage material 36, the outside air temperature is extremely low such as during severe cold and is likely to cause a shortage of heat. Sometimes, the temperature sensor 42 detects this and energizes the heater 41, and the heater 41 generates heat. As a result, the heat storage material 36 is supplied with heat from the heater 41 in addition to the heat from the compressor 6 to maintain a sufficient temperature and heat quantity, and is efficiently used as a refrigerant in the heat storage heat exchange pipe 37 without causing a shortage of heat quantity. Heat can continue to be supplied.

  Moreover, since the heat storage heat exchange pipe 37 is positioned between the outer periphery of the compressor 6 and the heater 41, heat is supplied from both the inner and outer directions, that is, from both the outer periphery of the compressor 6 and the heater 41. Therefore, the refrigerant in the heat storage heat exchange pipe 37 can be efficiently heated by the heat from the compressor 6 and the heater 41. Thereby, the time required for defrosting can be shortened, and the comfort can be improved by suppressing the decrease in room temperature due to the defrosting operation during the heating operation.

  Further, since the heat storage material 36 is pressure-bonded and fixed to the outer peripheral surface of the compressor 6 by the heat storage material mounting band 45, the heat storage material 36 can be securely fixed to the outer periphery of the compressor 6. And the flange part 40 of the both sides provided in order to set the said thermal storage material attachment band 45 expands the contact area to the compressor 6 outer peripheral surface of the thermal storage material 36. FIG. As a result, the amount of heat transfer from the compressor 6 to the heat storage material 36 increases, and the heat storage material 36 can be reduced from causing a shortage of heat storage. Accordingly, the energization to the heater 41 can be suppressed, and the heat supply ratio by the heater 41 can be reduced to promote energy saving.

  Further, the heat storage material mounting band 45 engages one end engaging portion 46 with one corner of the flange portion 40 of the heat storage material 36, and a screw fixing portion 47 at the other end of the flange portion 40 of the heat storage material 36. Since the heat storage material 36 is crimped and fixed to the outer peripheral surface of the compressor 6 by screwing to the other side, the heat storage material 36 can be easily mounted on the outer periphery of the compressor 6, and the heat storage material on the outer peripheral surface of the compressor 6. The degree of adhesion of 36 can be increased.

  On the other hand, the heat storage material 36 is provided with a temperature sensor 42 for controlling the energization of the heater 41 in a recess 38 between the substantially U-shaped portions of the heater 41, so that the accuracy of heater control is improved. It is possible to achieve high safety without excessive heating due to temperature detection delay. That is, the recess 38 provided with the temperature sensor 42 is thin and has a small heat capacity, and is further surrounded by the U-shaped portion of the heater 41 and the heat storage heat exchange pipe 37. This is similar to the temperature of the buried portion of the exchange pipe 37. Since the temperature sensor 42 detects the temperature of the recess 38, the temperature of the heat storage material 36 can be detected accurately, and high-precision control and safety can be ensured.

  Furthermore, since the upper portion of the recess 38 is open, it is possible to prevent hot air from being trapped in the recess space. Therefore, the temperature sensor 42 can detect the temperature of the recess wall portion with higher accuracy, and the heater control accuracy and safety can be further improved. In addition, since the lead wire 44 such as the temperature sensor 42 is drawn out from the open portion, it is necessary to perform post-processing such as drilling a lead wire through hole as in the case where there is a wall blocking the upper portion of the recess 38. Therefore, the cost can be reduced accordingly. In addition, since the lead wire 44 is drawn out in the same direction as the heat storage heat exchange pipe 37 and the heater 41, the workability at the time of assembly is improved and the cost can be further reduced. Since the temperature sensor 42, the thermal fuse 43, and the lead wire 44 are accommodated in the recess 38, they can be prevented from being damaged by an external force.

  The recess 38 is also provided with a temperature fuse 43 that physically cuts off the power supply to the heater 41, so that the power supply to the heater 41 is surely cut off even if the temperature sensor 42 fails to function. can do. Therefore, even if the heat storage material 36 is formed of an aluminum lump and the heater 41 is embedded and integrated, safety can be reliably ensured.

  Furthermore, in this embodiment, since the heat storage material 36 is constituted by a molded product (aluminum die-cast product), the heat storage material 36, the heat storage heat exchange pipe 37, and the heater 41 are completely integrated, and both of them. There is no gap between them as in the past. Therefore, the heat conduction between them becomes good, and the heat conduction to the heat storage heat exchange pipe 37 can be performed more efficiently.

  In addition, the planar end plate 48 provided on the upper end surface of the heat storage material 36 serves as a positioning member for the heater 41 and the heat storage heat exchange pipe 37 at the time of casting, and can be manufactured at low cost with a sand mold having a simple structure. . That is, when molding using a sand mold, the heat storage heat exchange pipe 37 and the heater 41 are positioned and held, so that the mold becomes complicated and the manufacturing cost increases. Since the pipe 37 and the heater 41 are positioned and held, the mold can be simplified and the manufacturing cost can be suppressed. In addition, the production cost can be further reduced by using the mold as a sand mold.

  Furthermore, if the planar end plate 48 is formed of a material having a lower thermal conductivity than the aluminum of the heat storage material 36, for example, a material such as stainless steel, iron, or zinc, the heat storage material 36 stores heat from the compressor 6. The heat storage effect of the heat storage material 36 can be enhanced and the energy saving performance and the defrosting effect can be further improved.

  As described above, the heat storage device 35 has various effects, but the refrigeration cycle device of the air conditioner in the present embodiment using the heat storage device 35 also has the following advantages.

That is, as described above, during the defrosting / heating operation, the three-way valve 23 causes the fourth pipe 24 and the seventh pipe 29 to communicate with each other, that is, the path leading the refrigerant from the outdoor heat exchanger 14 to the heat storage heat exchange pipe 37. Therefore, the refrigerant passing through the three-way valve 23 is depressurized by the capillary tube 31 to become a low temperature, and the heat of the heat storage material 36 is absorbed by the heat storage heat exchange pipe 37.

  By setting it as such a structure, the thermal storage heat exchange pipe 37 which heat-exchanges with the thermal storage material 36 can be made into low temperature. Since the maximum amount of heat absorbed from the heat storage material 36 is proportional to the temperature difference between the temperature of the compressor 6 and the temperature of the heat storage heat exchange pipe 37, if the temperature of the heat storage heat exchange pipe 37 can be lowered, the compressor 6 The temperature difference between the temperature and the temperature of the heat storage heat exchange pipe 37 can be further increased, the maximum amount of heat absorbed from the heat storage material 36 can be increased, the defrosting time can be shortened, and the room temperature by the defrosting operation during the heating operation The comfort can be improved by suppressing the decrease.

  Furthermore, since the evaporation of the liquid refrigerant in the heat storage heat exchange pipe 37 is promoted, the liquid refrigerant does not return to the compressor 6 and the reliability of the compressor 6 can be improved.

  Note that the discharge gas bypass route from the compressor 6 through the sixth pipe 28 to the outdoor heat exchanger 14 through the electromagnetic valve 30 is not always necessary, and is eliminated unless a very large defrosting capacity is required. It is good also as a structure.

  In this case, the gas phase refrigerant flows from the discharge port of the compressor 6 to the outdoor heat exchanger 14 through the first pipe 18, the indoor heat exchanger 16, the second pipe 20, and the third pipe 22. It becomes the structure which defrosts the container 14, and although a defrosting capability falls a little, a low-cost and compact structure is attained.

  Further, in this configuration, the capillary tube 31 is provided in the seventh pipe 29 extending from the three-way valve 23 to the heat storage heat exchange pipe 37, but instead of this configuration, the three-way valve 23 communicating with the heat storage heat exchange pipe 37 is used. The specification may be such that the opening is narrowed. In this case, the capillary tube 31 can be removed, and a low-cost and compact configuration is possible.

  As mentioned above, although the air conditioner concerning this invention has been demonstrated using the said embodiment, this invention is not limited to this. That is, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. That is, the scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  INDUSTRIAL APPLICABILITY The present invention can efficiently conduct heat to the refrigerant in the heat storage heat exchange pipe without causing a shortage of heat even in severe cold, and can provide an air conditioner with a high defrosting effect. Therefore, it can be widely applied to air conditioning for business use as well as general use.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Outdoor unit 4 Indoor unit 6 Compressor 8 Four way valve 10 Strainer 12 Expansion valve 14 Outdoor heat exchanger 15 Piping temperature sensor 16 Indoor heat exchanger 18 1st piping 20 2nd piping 22 3rd piping 23 3 way valve 24 4th piping 25 5th piping 26 Accumulator 28 6th piping 29 7th piping 30 Solenoid valve 31 Capillary tube 32 8th piping 35 Heat storage device 36 Thermal storage material 37 Thermal storage heat exchange pipe 38 Recess 39 Raised convex part 40 Flange part 41 Heater 42 Temperature Sensor 43 Thermal Fuse 44 Lead Wire 45 Heat Storage Material Mounting Band 46 Engaging Portion 47 Screw Stopping Portion 48 Planar End Plate

Claims (6)

A compressor and a heat storage device for storing heat from the compressor, the heat storage device internally storing the heat storage material disposed on the outer periphery of the compressor and the amount of heat stored in the heat storage material penetrating the heat storage material A heat storage heat exchange pipe that transfers heat to the refrigerant flowing through the heat storage material, the heat storage material is formed of an aluminum lump and a heater is embedded, and the heat storage heat exchange pipe includes the heater and the compressor. Air conditioner provided so as to be located between the outer periphery. The heat storage material has flange portions on both sides thereof, and further includes a heat storage material mounting band for fixing the heat storage material to the outer periphery of the compressor. The heat storage material mounting band has an engagement portion at one end and a screw fixing portion at the other end. The heat storage material mounting band is engaged with one of the flange portions of the heat storage material, and the screwing portion at the other end is screwed to the other of the flange portions of the heat storage material. The air conditioner according to claim 1, wherein the air conditioner is fixed to the outer peripheral surface of the compressor by pressure. The heat storage material is provided with a temperature sensor that controls the energization of the heater by bending the heater into a substantially U shape to form a recess in a portion between the substantially U-shaped portions. 2. The air conditioner according to 2. The air conditioner according to any one of claims 1 to 3, wherein the recess is provided in a vertical direction together with the heater, and at least an upper part thereof is opened, and a lead wire of the temperature sensor is drawn from the open part. The air conditioner according to any one of claims 1 to 4, further comprising a thermal fuse that physically cuts off power to the heater in the recess. The air conditioner according to any one of claims 1 to 5, wherein the heat storage material is formed of a molded product, and a planar end plate having substantially the same shape as the end surface of the heat storage material is provided on one of upper and lower end surfaces thereof.