JP2015172473A - Heat pump hot water supply outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump hot water supply outdoor unit which suppresses increase in material cost of replacement components and replacement time and in which a water refrigerant heat exchanger can be replaced at low cost, in the case where a water flow passage of the water refrigerant heat exchanger becomes narrow or is blocked by scale deposition, which suppresses enlargement of dimension of the whole heat pump hot water supply outdoor unit and which can suppress increase in material cost of the product.SOLUTION: A heat pump hot water supply outdoor unit 1 includes: a compressor 2 for compressing a refrigerant; and a water refrigerant heat exchanger for heating water by the refrigerant compressed by the compressor 2. The water refrigerant heat exchanger is divided into a plurality of portions (first water refrigerant heat exchanger 3, second water refrigerant heat exchanger 8), and part of the water refrigerant heat exchanger (second water refrigerant heat exchanger 8) is disposed above the compressor 2.

Description

  The present invention relates to a heat pump hot water supply outdoor unit.

  A heat pump hot water supply outdoor unit excellent in energy efficiency that absorbs heat of air and heats water is widely used. In a heat pump hot water supply outdoor unit, scales such as calcium carbonate gradually deposit in water passages that become hot during operation. When a large amount of scale adheres and the water flow path is narrowed or clogged, the boiling performance may be lowered, and further, it may not be possible to boil. In such a case, the water flow path is cleaned with a special cleaning agent or the like. However, when the blockage is significant, the cleaning is impossible, so the blocked part needs to be replaced. The hottest component in the water flow path of the heat pump hot water supply outdoor unit is a water refrigerant heat exchanger, and the water refrigerant heat exchanger is often replaced. The water-refrigerant heat exchanger is larger than other components, is heavier, and further includes a refrigerant flow path, so that replacement is not easy. Therefore, there are problems such as an increase in cost due to an increase in replacement time, an increase in material cost of parts to be replaced, and a significant increase in replacement cost.

  Patent Document 1 listed below discloses a heat pump hot water supply outdoor unit in which an integrated water-refrigerant heat exchanger (hot water heating heat exchanger 21) is disposed above a blower and a compressor.

JP 2013-130343 A (FIGS. 3 and 4)

The heat pump hot water supply outdoor unit of Patent Document 1 has the following problems.
(1) When the water flow path of the water-refrigerant heat exchanger (heat exchanger 21 for heating hot water) is narrowed or closed due to scale deposition, the water is large and heavy, and is a component having a refrigerant flow path. It is necessary to replace the entire refrigerant heat exchanger (hot water heating heat exchanger 21). For this reason, the cost increases due to the increase of the replacement time, the material cost of the part to be replaced also increases, and the replacement cost significantly increases.
(2) Since the integrated water-refrigerant heat exchanger (heat exchanger 21 for heating hot water) that is large and heavy is arranged above the blower and compressor, the overall size of the heat pump hot water supply outdoor unit is expanded. In addition, it is necessary to reinforce the member that supports the water-refrigerant heat exchanger, which significantly increases the material cost of the product.
(3) The integrated water-refrigerant heat exchanger (hot water heating heat exchanger 21), which is large in size and heavy, is placed above the blower and compressor, so that the center of gravity increases and the earthquake shakes. On the other hand, a large force acts on the outdoor unit of the heat pump hot water supply, and the earthquake resistance becomes disadvantageous.

  The present invention has been made to solve the above-described problems. When the water flow path of the water-refrigerant heat exchanger is narrowed or clogged due to scale deposition, the material cost and replacement time of replacement parts are increased. An object of the present invention is to provide a heat pump hot water supply outdoor unit that can suppress the water refrigerant heat exchanger at a low cost, suppress the size expansion of the entire heat pump hot water supply outdoor unit, and suppress an increase in material cost of the product.

  A heat pump hot water supply outdoor unit according to the present invention includes a compressor that compresses a refrigerant, and a water refrigerant heat exchanger that heats water using the refrigerant compressed by the compressor, and the water refrigerant heat exchanger includes a plurality of parts. The water refrigerant heat exchanger is partly disposed above the compressor.

  According to the present invention, when the water flow path of the water refrigerant heat exchanger is narrowed or clogged due to scale deposition, the increase in material cost and replacement time of the replacement part is suppressed, and the water refrigerant heat exchanger is replaced at low cost. In addition, it is possible to suppress the overall size expansion of the heat pump hot water supply outdoor unit and to suppress an increase in material cost of the product.

It is a front view which shows the internal structure of the heat pump hot-water supply outdoor unit of Embodiment 1 of this invention. It is the external appearance perspective view which looked at the heat pump hot-water supply outdoor unit of Embodiment 1 of this invention from diagonally forward. It is the external appearance perspective view which looked at the heat pump hot-water supply outdoor unit of Embodiment 1 of this invention from diagonally back. It is a figure which shows the refrigerant circuit and water circuit of the heat pump hot-water supply system provided with the heat pump hot-water supply outdoor unit of Embodiment 1 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a front view showing an internal structure of a heat pump hot water supply outdoor unit 1 according to Embodiment 1 of the present invention. FIG. 2 is an external perspective view of the heat pump hot water supply outdoor unit 1 according to Embodiment 1 of the present invention as viewed obliquely from the front. FIG. 3 is an external perspective view of the heat pump hot water supply outdoor unit 1 according to Embodiment 1 of the present invention as viewed obliquely from behind. FIG. 4 is a diagram illustrating a refrigerant circuit and a water circuit of the heat pump hot water supply system including the heat pump hot water supply outdoor unit 1 according to Embodiment 1 of the present invention.

  First, the overall configuration of the heat pump hot water supply outdoor unit 1 according to the first embodiment will be described. As shown in FIG. 1, the heat pump hot water supply outdoor unit 1 has a base 17 that forms the bottom of the housing. On the base 17, as viewed from the front, a machine room 14 is formed on the right side, and a blower room 15 is formed on the left side. The machine room 14 and the blower room 15 are separated by a partition plate 16. As shown in FIGS. 2 and 3, the casing forming the outline of the heat pump hot water supply outdoor unit 1 includes a casing front surface portion 18, a casing rear surface portion 19, a casing top surface portion 20, and a casing right side surface portion 21. And the housing left side surface portion 22 and the base 17. These components of the housing are formed from, for example, a sheet metal material. The outer surface of the heat pump hot water supply outdoor unit 1 is covered with this casing except for the air refrigerant heat exchanger 7 disposed on the rear side. An opening for discharging the air that has passed through the blower chamber 15 is formed in the housing front surface portion 18, and a lattice 18 a is attached to the opening. FIG. 1 shows a state in which a casing other than the base 17 is removed. Further, in FIG. 1, illustration of some of the constituent devices is omitted.

  As shown in FIG. 1, in the machine room 14, as a refrigerant circuit component, a compressor 2 that compresses refrigerant, an expansion valve 10 that depressurizes the refrigerant (not shown in FIG. 1), a suction pipe 4 that connects these, and a discharge A refrigerant pipe such as the pipe 5 is incorporated. A compressor (not shown) that performs a refrigerant compression operation and a motor (not shown) that is connected to the compressor and drives the compressor are incorporated in the compressor 2. When the power is supplied from the outside, the motor and the compression unit are driven at a predetermined rotational speed. A suction pipe 4 for sucking refrigerant is attached to the compressor 2. A discharge pipe 5 that discharges the refrigerant compressed in the compressor 2 is attached to the upper portion of the compressor 2. The expansion valve 10 has a coil built-in member attached to the outer surface of the main body. By energizing the coil from the outside, the internal flow resistance adjustment unit is operated to adjust the flow resistance of the refrigerant, and the upstream high pressure and downstream low pressure refrigerant pressure of the expansion valve 10 are adjusted to a predetermined pressure. It is like that.

  The blower room 15 has a larger space than the machine room 14 in order to secure an air passage. A blower 6 is incorporated in the blower chamber 15. The blower 6 has two to three propeller blades and a motor that rotationally drives the propeller blades. The motor and the propeller blade are rotated at a predetermined rotational speed by the external power supply. On the rear side of the blower chamber 15, an air refrigerant heat exchanger 7 is installed adjacent to the blower 6. The air-refrigerant heat exchanger 7 is composed of a number of aluminum thin plate fins and a long refrigerant pipe reciprocating several times in close contact with the aluminum thin plate fins in a substantially flat plate shape, and further bent into a substantially L shape. Molded. The air refrigerant heat exchanger 7 is installed from the rear surface to the left side surface of the heat pump hot water supply outdoor unit 1. The air refrigerant heat exchanger 7 exchanges heat between the refrigerant in the refrigerant pipe and the air around the fins. The air volume of the air flowing between the fins and passing by the blower 6 is increased and adjusted, and the amount of heat exchange is increased and adjusted.

  The first water refrigerant heat exchanger 3 is installed on the upper surface of the base 17 below the blower chamber 15. The first water refrigerant heat exchanger 3 is housed and installed in a storage container 50 having a substantially rectangular parallelepiped shape while being covered with a heat insulating material. The first water refrigerant heat exchanger 3 is bent so that it can be stored in the storage container 50 in a state in which the long water pipe and the long refrigerant pipe are in close contact with each other. The first water refrigerant heat exchanger 3 heats water by exchanging heat between the refrigerant in the refrigerant pipe and the water in the water pipe. A blower 6 is disposed above the first water refrigerant heat exchanger 3.

  In the upper part of the machine room 14, an electrical product storage box 9 is installed. An electronic substrate 24 is stored in the electrical product storage box 9. On the lower surface 24b of the electronic substrate 24, electronic parts and electric parts constituting each module for driving and controlling the compressor 2, the expansion valve 10, the blower 6 and the like are attached. An inverter module 23 for driving the compressor 2 is attached to the electronic board 24 as one of the modules. The components of inverter module 23 of the first embodiment include electronic components formed using a wide band gap semiconductor such as silicon carbide (SiC). The wide band gap semiconductor is not limited to SiC, and for example, a gallium nitride (GaN) -based material or diamond may be used. An electronic component formed using a wide band gap semiconductor has a high withstand voltage and a high allowable current density. For this reason, these electronic components can be reduced in size. For this reason, the inverter module 23 can be downsized. Moreover, since the electronic component formed using the wide band gap semiconductor has high heat resistance, the inverter module 23 can be allowed to reach a high temperature. An electronic component formed using a wide band gap semiconductor has a feature of low power loss. For this reason, the efficiency of the inverter module 23 can be increased. In the first embodiment, it is preferable that all the semiconductor elements of the inverter module 23 are formed using a wide band gap semiconductor. However, at least a part of the semiconductor elements are formed using a wide band gap semiconductor. Thus, the effects described in this embodiment can be obtained.

  Generally, a large heat radiation component is installed in close contact with the inverter module 23, and the inverter module 23 is cooled by projecting the heat radiation component to the blower chamber 15. On the other hand, in this Embodiment 1, the large radiating component closely_contact | adhered to the inverter module 23 is not installed. For this reason, since it is not necessary to consider interference with the large radiating component closely_contact | adhered to the inverter module 23 and the air blower 6, the electrical goods storage box 9 can be arrange | positioned in a low position. Therefore, a space can be provided between the upper surface of the electrical component storage box 9 and the lower surface of the housing upper surface portion 20. As a result, the second water refrigerant heat exchanger 8 can be easily arranged in this space. Since the inverter module 23 including electronic components formed using a wide band gap semiconductor has high heat resistance, there is no problem even if a large heat dissipation component is not provided.

  The inverter module 23 controls the rotation speed of the motor of the compressor 2 to be changed to a predetermined rotation speed of about several tens rps (Hz) to one hundred rps (Hz). Another module attached to the electronic board 24 changes the opening degree of the expansion valve 10 to a predetermined amount, and yet another module has a predetermined rotational speed of the blower 6 of several hundred rpm to 1,000 rpm. Control to change. A terminal block 9 a for connecting an external electric wiring is provided on the right part of the electrical product storage box 9. As shown in FIGS. 2 and 3, a service panel 27 for protecting the terminal block 9 a and a water inlet valve 28 and a hot water outlet valve 29 described later is attached to the right side surface portion 21 of the housing.

  In the space between the upper surface of the electrical component storage box 9 and the lower surface of the housing upper surface portion 20, the second water refrigerant heat exchanger 8 is installed. The second water refrigerant heat exchanger 8 is housed and installed in a substantially rectangular parallelepiped storage container 51 in a state covered with a heat insulating material. The second water refrigerant heat exchanger 8 is bent so that it can be stored in the storage container 51 in a state in which the long water pipe and the long refrigerant pipe are in close contact with each other. The second water refrigerant heat exchanger 8 heats water by performing heat exchange between the refrigerant in the refrigerant pipe and the water in the water pipe.

As shown in FIG. 4, the compressor 2 is connected to the refrigerant inlet portion of the second water refrigerant heat exchanger 8 through the discharge pipe 5. The refrigerant outlet portion of the second water refrigerant heat exchanger 8 is connected to the refrigerant inlet portion of the first water refrigerant heat exchanger 3 via the refrigerant pipe 52. The refrigerant outlet portion of the first water refrigerant heat exchanger 3 is connected to the inlet portion of the expansion valve 10 in the machine chamber 14 via the refrigerant pipe 53. The outlet portion of the expansion valve 10 is connected to the refrigerant inlet portion of the air refrigerant heat exchanger 7 via the refrigerant pipe 54. The refrigerant outlet portion of the air refrigerant heat exchanger 7 is connected to the compressor 2 via the suction pipe 4. In addition, other refrigerant circuit components may be attached in the middle of each refrigerant pipe. A predetermined amount of refrigerant (for example, CO ₂ refrigerant) is sealed in the sealed space of the refrigerant circuit configured as described above.

  Next, the water circuit of the heat pump hot water supply outdoor unit 1 and the hot water storage device 33 will be described. As shown in FIG. 1, a first internal water pipe 30, a second internal water pipe 31, a third internal water pipe 32 and other water circuit components are incorporated in the machine room 14. On the right side of the base 17, both are provided side by side so that the water inlet valve 28 is on the lower side and the hot water outlet valve 29 is on the upper side. The first internal water pipe 30 connects between the water inlet valve 28 and the water inlet portion of the first water refrigerant heat exchanger 3. The second internal water pipe 31 connects between the hot water outlet portion of the first water refrigerant heat exchanger 3 and the hot water inlet portion of the second water refrigerant heat exchanger 8. The third internal water pipe 32 connects between the hot water outlet portion of the second water refrigerant heat exchanger 8 and the hot water outlet valve 29.

  As shown in FIG. 4, the heat pump hot water supply outdoor unit 1 and the hot water storage device 33 constitute a heat pump hot water supply system. The hot water storage device 33 includes a hot water storage tank 34 having a capacity of, for example, several hundred liters, and a water pump 35 for sending water in the hot water storage tank 34 to the heat pump hot water supply outdoor unit 1. The heat pump hot water supply outdoor unit 1 and the hot water storage device 33 are connected via a first external water pipe 36, a second external water pipe 37, and electrical wiring (not shown).

  The lower part of the hot water storage tank 34 is connected to the suction port of the water pump 35 via a pipe 38. The first external water pipe 36 connects between the discharge port of the water pump 35 and the water inlet valve 28 of the heat pump hot water supply outdoor unit 1. The second external water pipe 37 connects between the hot water outlet valve 29 of the heat pump hot water supply outdoor unit 1 and the hot water storage device 33. The second external water pipe 37 can communicate with the upper part of the hot water storage tank 34 via a pipe 39 in the hot water storage apparatus 33.

  The hot water storage device 33 further includes a mixing valve 40. The mixing valve 40 is connected to a hot water supply pipe 41 branched from the pipe 39, a water supply pipe 42 through which water such as city water supplied from the outside passes, and a hot water supply pipe 43 through which hot water supplied to the user side passes. ing. The mixing valve 40 adjusts the hot water supply temperature by adjusting the mixing ratio of hot water (high temperature water) flowing from the hot water supply pipe 41 and water (low temperature water) flowing from the water supply pipe 42. The hot water mixed by the mixing valve 40 is sent to the user side (for example, a bathtub, a shower, a faucet, a dishwasher, etc.) through the hot water supply pipe 43. A water supply pipe 44 branched from the water supply pipe 42 is connected to the lower part of the hot water storage tank 34. The water flowing from the water supply pipe 44 is stored below the hot water storage tank 34.

  Next, the operation of the heat pump hot water supply outdoor unit 1 in a boiling operation (hot water storage operation) in which hot water heated by the heat pump hot water supply outdoor unit 1 is sent to the hot water storage device 33 to store hot water in the hot water storage tank 34 will be described. When power is supplied from the inverter module 23 to the motor in the compressor 2, the motor is driven, and the compression unit in the compressor 2 connected to the motor is driven. The inverter power supply changes the rotational speed of the motor to a predetermined rotational speed of about several tens of rps (Hz) to one hundred rps (Hz). Thereby, the control is controlled to a predetermined boiling capacity by changing the circulation speed of the heat pump cycle performed by circulating the refrigerant and the flow rate of the refrigerant.

  Further, when power is supplied to the motor of the blower 6 from another module attached to the electronic substrate 24 in the electrical product storage box 9, the motor is driven, and the propeller blades of the blower 6 connected to the motor are rotationally driven. . The number of rotations of the motor changes from several hundred rpm to about 1,000 rpm, and the amount of heat exchange between the refrigerant and air in the air refrigerant heat exchanger 7 is changed by changing the flow rate of air passing through the air refrigerant heat exchanger 7. Adjustment control is performed to a predetermined amount. Air is sucked from the rear of the air refrigerant heat exchanger 7 installed behind the blower 6, passes through the air refrigerant heat exchanger 7, passes through the blower chamber 15, and is opposite to the air refrigerant heat exchanger 7. It is discharged to the front of the housing front face 18.

  Further, when the coil of the coil built-in member attached to the outer surface of the main body of the expansion valve 10 is energized from another module attached to the electronic board 24 in the electrical product storage box 9, the expansion valve 10 is generated in the coil. The internal flow resistance adjustment unit is operated by the electromagnetic action to adjust the flow resistance of the refrigerant. Thereby, the refrigerant pressure of the upstream high pressure and the downstream low pressure of the expansion valve 10 is adjusted and controlled to a predetermined pressure. In addition, the rotation speed of the compressor 2, the rotation speed of the air blower 6, and the flow path resistance of the expansion valve 10 are controlled according to the installation environment and use conditions of the heat pump hot water supply outdoor unit 1.

  When the compression unit in the compressor 2 is driven, the refrigerant is compressed in the compression unit, and the low-pressure refrigerant is sucked into the compressor 2 from the suction pipe 4. The low-pressure refrigerant is compressed by the compression unit in the compressor 2 and becomes a high-temperature high-pressure refrigerant. This high-temperature and high-pressure refrigerant is discharged from the compressor 2 to the discharge pipe 5. The high-temperature and high-pressure refrigerant flows from the discharge pipe 5 into the refrigerant inlet portion of the second water refrigerant heat exchanger 8. The high-temperature and high-pressure refrigerant heat-exchanges water with the water in the second water refrigerant heat exchanger 8 to generate hot water. The high-temperature and high-pressure refrigerant that has passed through the second water refrigerant heat exchanger 8 passes through the refrigerant pipe 52 and flows into the refrigerant inlet portion of the first water refrigerant heat exchanger 3. The high-temperature and high-pressure refrigerant heat-exchanges water with the water in the first water refrigerant heat exchanger 3 to generate hot water. The refrigerant lowers the enthalpy and lowers the temperature while passing through the second water refrigerant heat exchanger 8 and the first water refrigerant heat exchanger 3. The high-pressure refrigerant having the lowered temperature flows from the refrigerant outlet portion of the first water refrigerant heat exchanger 3 through the refrigerant pipe 53 to the inlet portion of the expansion valve 10. The high-pressure refrigerant is depressurized to a predetermined pressure by the expansion valve 10 to drop in temperature, and becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows from the outlet portion of the expansion valve 10 through the refrigerant pipe 54 and into the inlet portion of the air refrigerant heat exchanger 7. The low-temperature and low-pressure refrigerant exchanges heat with air in the air refrigerant heat exchanger 7, increases enthalpy, flows into the suction pipe 4 from the outlet of the air refrigerant heat exchanger 7, and is sucked into the compressor 2. Thus, the refrigerant circulates and a heat pump cycle is performed.

  At the same time, when the water pump 35 is driven, the water in the lower part of the hot water storage tank 34 passes through the pipe 38, the first external water pipe 36, the water inlet valve 28 and the first internal water pipe 30 to exchange the first water refrigerant heat. It flows into the water inlet of the vessel 3. This water exchanges heat with the refrigerant in the second water refrigerant heat exchanger 8 and is heated to produce hot water. This hot water flows into the water inlet of the second water refrigerant heat exchanger 8 through the second internal water pipe 31. This hot water exchanges heat with the refrigerant in the second water refrigerant heat exchanger 8 and is further heated to produce hotter hot water. This hot water passes through the third internal water pipe 32, the hot water outlet valve 29, the second external water pipe 37 and the pipe 39 from the hot water outlet of the second water refrigerant heat exchanger 8, and enters the upper part of the hot water storage tank 34. Inflow. By performing such a boiling operation (hot water storage operation), hot water is accumulated in the hot water storage tank 34 from the upper part toward the lower part.

  Note that the hot water heated by the heat pump hot water supply outdoor unit 1 may be directly supplied to the user side without being stored in the hot water storage tank 34. Moreover, you may utilize the hot water heated with the heat pump hot water supply outdoor unit 1 for heating.

  As described above, in the heat pump hot water supply outdoor unit 1 of Embodiment 1, the water refrigerant heat exchanger that performs heat exchange between water and the refrigerant is the first water refrigerant heat exchanger 3 and the second water refrigerant heat exchange. The device 8 is separated into two parts. The second water refrigerant heat exchanger 8 is on the downstream side of the water flow path with respect to the first water refrigerant heat exchanger 3. For this reason, in the water flow path of the heat pump hot water supply outdoor unit 1, the water piping of the second water refrigerant heat exchanger 8 has the highest temperature. Therefore, in the water flow path of the heat pump hot water supply outdoor unit 1, it is the water pipe of the second water refrigerant heat exchanger 8 that is most likely to deposit scales such as calcium carbonate. When a large amount of scale adheres in the water pipe of the second water refrigerant heat exchanger 8 and the water pipe is narrowed or closed, the boiling performance may be lowered, and further the boiling may not be possible. In such a case, the water flow path is washed with a special cleaning agent or the like, but if the clogging is significant, washing is impossible and the second water refrigerant heat exchanger 8 is replaced.

  In the first embodiment, it is not necessary to replace the entire water refrigerant heat exchanger of the heat pump hot water supply outdoor unit 1, and the second water refrigerant heat exchanger that is a part of the water refrigerant heat exchanger of the heat pump hot water supply outdoor unit 1 is used. Only 8 can be exchanged. For this reason, compared with the case where the whole water-refrigerant heat exchanger is replaced | exchanged, the material cost of replacement parts (the 2nd water-refrigerant heat exchanger 8) can be reduced, replacement time can also be reduced, and the cost required for replacement is greatly It becomes possible to suppress.

  The temperature of the water pipe of the first water refrigerant heat exchanger 3 located on the upstream side of the water flow path with respect to the second water refrigerant heat exchanger 8 is as high as the temperature of the water pipe of the second water refrigerant heat exchanger 8. Don't be. For this reason, in the water piping of the first water refrigerant heat exchanger 3, scales such as calcium carbonate are not easily deposited, and the flow path is not easily narrowed. Therefore, it is only necessary to replace the second water refrigerant heat exchanger 8, and it is not necessary to replace the first water refrigerant heat exchanger 3.

  The second water refrigerant heat exchanger 8 is preferably smaller in size and weight than the first water refrigerant heat exchanger 3. By making the size and weight of the second water refrigerant heat exchanger 8 smaller than that of the first water refrigerant heat exchanger 3, the cost of the replacement part (second water refrigerant heat exchanger 8) can be further suppressed.

  The second water refrigerant heat exchanger 8 is disposed above the compressor 2. For this reason, when exchanging the second water refrigerant heat exchanger 8, it is not necessary to remove the compressor 2, and the second water refrigerant heat exchanger 8 is removed while the compressor 2 remains fixed to the base 17. be able to. For this reason, when replacing | exchanging the 2nd water refrigerant | coolant heat exchanger 8, the quantity of the components removed temporarily can be reduced. In particular, since there is no need to remove a large and heavy component such as the compressor 2, an increase in cost due to an increase in replacement time can be suppressed.

  The second water refrigerant heat exchanger 8 is installed in a space between the upper surface of the electrical component storage box 9 and the lower surface of the housing upper surface portion 20. For this reason, the space inside a housing | casing can be utilized effectively, the dimension expansion of the heat pump hot-water supply outdoor unit 1 whole can be suppressed, and the increase in the material cost of a product can be suppressed. In addition, the electrical product storage box 9 including the inverter module 23 is disposed above the compressor 2, and the second water refrigerant heat exchanger 8 is disposed above the electrical product storage box 9. For this reason, when the second water refrigerant heat exchanger 8 is replaced, it is not necessary to remove the electrical component storage box 9 including the inverter module 23, and therefore an increase in cost due to an increase in replacement time can be suppressed.

  The inverter module 23 becomes high temperature due to its own heat generation. As described above, the inverter module 23 according to the first embodiment uses a wide band gap semiconductor such as SiC. In the first embodiment, a large heat radiation component that is in close contact with the inverter module 23 is not provided. Wide bandgap semiconductors are superior in heat resistance compared to ordinary semiconductors. For this reason, there is no problem even if a large heat radiation component that is in close contact with the inverter module 23 is not provided.

  As shown in FIG. 1, the first water refrigerant heat exchanger 3 is disposed at a lower position than the second water refrigerant heat exchanger 8. For this reason, compared with the case where the whole water-refrigerant heat exchanger is arrange | positioned at the upper part of the heat pump hot water supply outdoor unit 1, the gravity center of the heat pump hot water supply outdoor unit 1 can be made low. Therefore, it is possible to reduce the force acting on the heat pump hot water supply outdoor unit against the shaking of the earthquake, which is advantageous for earthquake resistance. In particular, the first water refrigerant heat exchanger 3 that is larger in size and weight than the second water refrigerant heat exchanger 8 is disposed at a low position, so that the above-described effect is more remarkably exhibited. In the first embodiment, the height of the upper end of the second water refrigerant heat exchanger 8 is substantially the same as the upper end of the air refrigerant heat exchanger 7. As described above, the height of the upper end of the second water refrigerant heat exchanger 8 is set to be substantially the same as or lower than the upper end of the air refrigerant heat exchanger 7, so that the heat pump hot water supply outdoor unit 1 as a whole. Can be suppressed, and the center of gravity of the heat pump hot water supply outdoor unit 1 can be lowered.

  When exchanging the second water refrigerant heat exchanger 8, it is possible to remove the second water refrigerant heat exchanger 8 without removing the first water refrigerant heat exchanger 3 from the base 17. For this reason, an increase in cost due to an increase in replacement time can be suppressed. The connection part of the discharge pipe 5, the refrigerant | coolant piping 52, the 2nd internal water piping 31, the 3rd internal water piping 32, and the 2nd water refrigerant | coolant heat exchanger 8 is detachable. When exchanging the second water refrigerant heat exchanger 8, the second water refrigerant heat exchanger 8 can be removed by removing these connections.

  As described above, according to the first embodiment, the heat pump hot water supply outdoor unit 1 that is excellent in terms of long-term performance maintenance, reliability, and cost can be obtained. The heat pump hot water supply outdoor unit is more efficient than other hot water supply devices, and the user's interest is high in the performance of the heat pump hot water supply outdoor unit, and the heat pump hot water supply outdoor unit of the present invention significantly contributes.

  In the first embodiment, the water refrigerant heat exchanger of the heat pump hot water supply outdoor unit 1 is separated into two parts, a first water refrigerant heat exchanger 3 and a second water refrigerant heat exchanger 8 as an example. However, in the present invention, the water / refrigerant heat exchanger of the heat pump hot water supply outdoor unit may be separated into three or more parts, and a part of them may be disposed above the compressor. Even in that case, the same effect as described above can be obtained.

DESCRIPTION OF SYMBOLS 1 Heat pump hot water supply outdoor unit, 2 compressor, 1st water refrigerant heat exchanger, 4 suction pipe, 5 discharge pipe, 6 air blower, 7 air refrigerant heat exchanger, 8 second water refrigerant heat exchanger, 9 electrical equipment storage Box, 9a terminal block, 10 expansion valve, 14 machine room, 15 blower room, 16 partition plate, 17 base, 18 housing front face part, 18a lattice, 19 housing rear face part, 20 body upper face part, 21 housing right side face part , 22 Case left side, 23 Inverter module, 24 Electronic board, 24b Bottom, 27 Service panel, 28 Water inlet valve, 29 Hot water outlet valve, 30 First internal water piping, 31 Second internal water piping, 32 Third internal Water piping, 33 Hot water storage device, 34 Hot water storage tank, 35 Water pump, 36 First external water piping, 37 Second external water piping, 38, 39 piping, 40 Mixing valve, 41, 43 Hot water supply piping, 4 2,44 Water supply pipe, 50, 51 Storage container, 52, 53, 54 Refrigerant pipe

Claims (7)

A compressor for compressing the refrigerant;
A water-refrigerant heat exchanger that heats water with the refrigerant compressed by the compressor;
With
The water refrigerant heat exchanger is separated into a plurality of parts,
A part of the water-refrigerant heat exchanger is a heat pump hot water supply outdoor unit disposed above the compressor.   2. The heat pump hot water supply outdoor unit according to claim 1, wherein the part of the water refrigerant heat exchanger is located downstream of the water flow path with respect to the other parts. An electronic component for driving the compressor;
The electronic component is disposed above the compressor,
The heat pump hot water supply outdoor unit according to claim 1 or 2, wherein the part of the water-refrigerant heat exchanger is disposed above the electronic component. An electronic component for driving the compressor;
The heat pump hot water supply outdoor unit according to claim 1, wherein the electronic component includes a component formed using a wide band gap semiconductor.   The heat pump hot water supply outdoor unit according to any one of claims 1 to 4, wherein a part other than the part of the water-refrigerant heat exchanger is disposed at a position lower than the part.   The heat pump hot water supply outdoor unit according to any one of claims 1 to 5, wherein the part can be removed without removing a part other than the part of the water-refrigerant heat exchanger. It has an air refrigerant heat exchanger that exchanges heat between air and refrigerant,
The height of the upper end of the part of the water refrigerant heat exchanger is equal to or lower than the height of the upper end of the air refrigerant heat exchanger. .

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