JP2012052684A - Heat pump heat source machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump heat source machine that can increase the efficiency of a radiator (water-refrigerant heat exchanger), and also reduce noise.SOLUTION: The heat pump heat source machine includes: a refrigerant circuit in which a compressor, a radiator (water-refrigerant heat exchanger) 5, a pressure reducer, and an evaporator 7 are all connected in a circular via a refrigerant piping, and through which a refrigerant is circulated; a blower fan 9 disposed downstream of the evaporator and for distributing air into the evaporator 7; and a heat insulation material 18 with which the circumference of radiator 5 is covered. The heat pump heat source machine is configured such that the thickness of an upper side radiator heat insulation material 18a that is a heat insulation material provided above the evaporator 5 and in a direction relative to the blower fan 9 is thicker than that of a lower side radiator heat insulation material 18b that is a heat insulation material provided below the evaporator 5.

Description

  The present invention relates to a heat pump heat source machine.

  Conventionally, this type of heat pump heat source device is formed by connecting a compressor, a water-refrigerant heat exchanger as a radiator, a decompression unit, and an air-refrigerant heat exchanger as an evaporator in an annular shape, and compressing the compression on a bottom plate. A water-refrigerant heat exchanger that is a radiator, an air-refrigerant heat exchanger that is an evaporator, and the water-refrigerant heat exchanger that is the radiator is covered with a heat insulator, and the heat insulator An insulator cover is provided so as to cover the periphery, and the air-refrigerant heat exchanger that is the evaporator and the evaporator inside thereof is positioned, and the air-refrigerant heat exchanger that is an evaporator is disposed on the upper surface of the insulator cover. It is the structure which mounts the ventilation means for ventilating (for example, refer patent document 1).

  8 and 9 show a conventional heat pump heat source device described in Patent Document 1, FIG. 8 is a front view of the interior, and FIG. 9 is a cross-sectional view of a main part showing a cross section BB of FIG. Show.

  As shown in FIGS. 8 and 9, an air-refrigerant heat exchanger 102, which is an evaporator formed by bending the bottom plate 101 into a substantially L shape, is disposed. The heat exchanger 102 has a plurality of rows, which are an outer row heat collecting heat exchanger 102a on the upstream side and an inner row heat collecting heat exchanger 102b on the downstream side. The air-refrigerant heat exchanger 102, which is an evaporator, has a blower means 103 in the front and inside. The blower means 103 includes a blower fan 104, a blower motor 105 that drives the blower fan 104, and a blower motor 105. The motor base 106 is supported.

  The water-refrigerant heat exchanger 107, which is a radiator, is arranged in the lower part of the air-refrigerant heat exchanger 102, which is a substantially L-shaped evaporator, and the water-refrigerant heat exchanger 107, which is a radiator. The periphery is placed on the bottom plate 101 in a state covered with the heat insulator 108. A cover body 109 is provided so as to cover the heat insulator 108.

  As shown in FIG. 9, the heat insulating material 108 has an upper heat insulator 108 a and a lower heat insulator 108 b at the top and bottom, and the upper heat insulator 108 a and the lower heat insulator 108 b are used as water radiators. Heat insulation is performed by sandwiching the refrigerant heat exchanger 107 in a sandwich shape. The upper heat insulator 108a above the water-refrigerant heat exchanger 107 is thin, and the lower heat insulator 108b below is thick.

  On the other hand, in FIG. 10, the flow around the blower fan 104 from the air-refrigerant heat exchanger 102 that is an evaporator and the flow around the blower fan 104 including the bell mouth 110 are indicated by arrows. This describes the flow around the general bell mouth 110. Below the bell mouth 110, there is a flow 111 around the bell mouth that occurs while bypassing the surface below the bell mouth 110 (for example, Patent Document 2).

Japanese Patent No. 3931878 Japanese Patent Laid-Open No. 2003-184797

  However, thinning the heat insulator 108a above the water-refrigerant heat exchanger 107 means that the heat insulating material closer to the blower fan 104 is thinned. There is a problem that the cooling is caused by the cold air passing through a certain air-refrigerant heat exchanger 102 and the efficiency is lowered.

  In particular, the air passing through the air-refrigerant heat exchanger 102 which is an evaporator is cooler than the ambient temperature around the heat pump heat source unit. Therefore, the cover body 109 under the bell mouth 110 is cooled by the flow 111 around the bell mouth 110, and the water-refrigerant heat exchanger 107, which is a radiator disposed in the cover body 109, is cooled. . For this reason, there has been a problem that the efficiency of heat exchange between water and the refrigerant in the water-refrigerant heat exchanger 107 which is a radiator is reduced.

  In particular, the water-refrigerant heat exchanger 107, which is a heat radiator, is heated from water and switched to warm water, and the flow direction is from the bottom to the top. This means that the high temperature part is on the upper side. On the other hand, if the insulator 108a is made thin and further cooled by the flow 111 around the bell mouth, the performance is deteriorated. It can be said that it is not preferable.

  Further, the vibration of the compressor is transmitted from the upper heat insulating material 108a to the water-refrigerant heat exchanger 107, which is a radiator, via the cover body 109 and the like, and the spiral constituting the water-refrigerant heat exchanger 107, which is a radiator. There is also a problem that the copper pipe is vibrated slightly, and the collision sound of the copper pipe due to the vibration is transmitted upward, and may become abnormal sound.

  This invention solves the said conventional subject, and it aims at providing the heat pump heat-source equipment which can improve the efficiency of the water-refrigerant heat exchanger which is a heat radiator, and can also implement | achieve a noise reduction. .

  In order to solve the conventional problems, a heat pump heat source apparatus according to the present invention includes a refrigerant circuit that circulates a refrigerant by connecting a compressor, a water-refrigerant heat exchanger, a decompression unit, an evaporator in an annular manner with a refrigerant pipe, and the evaporation A blower fan that conveys air to a vessel, and a heat insulating material that covers the periphery of the water-refrigerant heat exchanger, and a heat insulating material in a direction facing the blower fan above the water-refrigerant heat exchanger, It is configured to be thicker than the heat insulating material below the water-refrigerant heat exchanger.

  ADVANTAGE OF THE INVENTION According to this invention, the efficiency of the water-refrigerant heat exchanger which is a heat radiator can be improved, and the heat pump heat source machine which can also implement | achieve low noise can be provided.

Sectional drawing of the heat pump heat source machine in Embodiment 1 of this invention Sectional drawing of the principal part of the heat pump heat source machine in Embodiment 1 of this invention (A) Inside view top view of the heat pump heat source machine in Embodiment 1 of the present invention (b) Inside view front view of the heat pump heat source machine Circuit diagram of the heat pump heat source machine The perspective view of the water-refrigerant heat exchanger of the heat pump heat source machine Sectional drawing of the principal part of the heat pump heat source machine in Embodiment 2 of this invention Sectional drawing of the principal part of the heat pump heat source machine in Embodiment 3 of this invention Interior view of a conventional heat pump heat source machine Cross section of the main part of the heat pump heat source machine Wind direction diagram of conventional heat pump heat source machine

  A first invention includes a compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that circulates a refrigerant by connecting the evaporator in an annular manner with a refrigerant pipe, a blower fan that conveys air to the evaporator, water A heat insulating material covering the periphery of the refrigerant heat exchanger is provided, and the heat insulating material above the water-refrigerant heat exchanger is configured to be thicker than the heat insulating material below the water-refrigerant heat exchanger; It is a heat pump heat source machine.

  As a result, the heat-insulating material close to the hot water pipe and the low-temperature air flow path passing through the evaporator is cooled, and a heat radiator (water-refrigerant heat exchanger) disposed inside the heat insulating material. In contrast to cooling the high-temperature side water pipe and refrigerant pipe, it is possible to suppress cooling by increasing the thickness of the upper heat insulating material. It is possible to prevent the heat exchanger) from being cooled and the temperature from decreasing, and thus the efficiency from decreasing, and to provide an efficient heat pump heat source machine.

  The second invention is characterized in that, in particular, the heat insulating material of the first invention is placed on the bottom plate of the exterior body, and the heat insulating material in the direction facing the blower fan is made thicker than the heat insulating material in the direction facing the bottom plate. The air blower fan and the air flow around the bell mouth cool the heat insulating material, and as a result, the high temperature side water pipe and refrigerant pipe of the radiator (water-refrigerant heat exchanger) In contrast to cooling, the thickness of the upper heat insulating material is increased, so that cooling can be suppressed. Therefore, the radiator (water-refrigerant heat exchanger) that has reached a high temperature is cooled, and the temperature Can be prevented, and as a result, efficiency can be prevented from decreasing, and an efficient heat pump heat source machine can be obtained. Furthermore, upward sound leakage can be prevented, and a heat pump heat source machine that can be reduced in noise can be obtained.

  The third invention is characterized in that, in particular, the heat insulating material of the first invention is placed on the bottom plate of the exterior body, and the heat insulating material in the direction facing the evaporator is made thicker than the heat insulating material on the opposite side. The air that is sucked into the blower fan and that is lower than the air temperature that has passed through the air-refrigerant heat exchanger, which is the evaporator, is the heat insulating material, and hence the radiator (water-refrigerant heat exchange) inside it. The temperature can be prevented from decreasing, and thus the efficiency can be prevented, and the heat pump heat source device can be made efficient. Therefore, the heat pump heat source device capable of realizing improved performance can be obtained.

  A fourth invention includes a compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that circulates a refrigerant by connecting the evaporator annularly with a refrigerant pipe, a blower fan that conveys air to the evaporator, A heat insulating material that covers the periphery of the water-refrigerant heat exchanger, and of the heat insulating materials, the density of the heat insulating material above the water-refrigerant heat exchanger is defined as the heat insulating material below the water-refrigerant heat exchanger. It is higher than the density.

  By increasing the density by this, the air blowing fan and the air flow around the bell mouth cool the heat insulating material, and consequently the high temperature side water pipe of the radiator (water-refrigerant heat exchanger), It is possible to suppress the cooling by increasing the density of the heat insulating material above the cooling of the refrigerant pipe, and therefore, the radiator (water-refrigerant heat exchanger) that has reached a high temperature is cooled. In addition, it is possible to prevent the temperature from decreasing, and consequently the efficiency, to be an efficient heat pump heat source machine, and the same effect can be obtained without making the thickness so large. The thickness of the heat insulating material can be reduced, which can realize a compact body unit.

The fifth invention includes a compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that connects the evaporator in a ring shape with a refrigerant pipe and circulates the refrigerant, a blower fan that conveys air to the evaporator, Water
A heat insulating material covering the periphery of the refrigerant heat exchanger, and of the heat insulating materials, the density of the heat insulating material above the water-refrigerant heat exchanger is higher than the density of the heat insulating material below the water-refrigerant heat exchanger. Vacuum insulation with a thermal conductivity approximately 1/10 of the foam insulation above the insulation composed of insulation such as polystyrene foam covering the radiator (water-refrigerant heat exchanger) The heat sink is cooled by the fact that the piping of the radiator (water-refrigerant heat exchanger) that has become hot and the blower fan are facing each other, and consequently the radiator (water-refrigerant heat exchange) In contrast to cooling the high-temperature side water pipe and the refrigerant pipe, it is possible to suppress the cooling by providing the vacuum heat insulating material. It can be a good heat pump heat source machine. At that time, the thickness on the heat insulating material can be reduced, and the heat pump heat source machine can be made to have a smaller main body size and a compact size.

  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 is a cross-sectional view of a heat pump heat source machine according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part of the heat pump heat source machine, FIG. 3 (a) is a top view, and FIG. FIG. 4 is a front circuit diagram, FIG. 4 is a piping circuit diagram showing a refrigerant circuit and a hot water supply cycle, and FIG. 5 is a perspective view of a main part of the water-refrigerant heat exchanger.

  First, the piping circuit diagram of FIG. 4 will be described. 1 is a heat pump heat source device for heating tap water, 2 is connected to the heat pump heat source device 1 by a pipe 3, and the heated hot water is stored and stored. 2 is a tank unit for mixing hot water and tap water to supply hot water having a predetermined temperature to the hot water supply terminal 14.

  The heat pump heat source unit 1 includes a compressor 4, a radiator (water-refrigerant heat exchanger) 5 composed of a copper pipe having high thermal conductivity, a decompression means 6 such as an expansion valve, and air-refrigerant heat as an evaporator. There is an exchanger 7, and a compressor 4, a radiator (water-refrigerant heat exchanger) 5, a decompression means 6, and an air-refrigerant heat exchanger 7 are sequentially connected in a ring to form a closed circuit, and the refrigerant is circulated. The refrigerant circuit 8 is configured. Reference numeral 9 denotes a blower fan that conveys air to the air-refrigerant heat exchanger 7 that is an evaporator, and promotes the heat exchange capability of the air-refrigerant heat exchanger 7.

  On the other hand, the hot water supply cycle 10 constituting the tank unit 2 is located in the heat pump heat source unit 1, and a heat radiator (water-refrigerant heat exchanger) 5 for exchanging heat and changing tap water or the like into hot water, and a radiator (water- Hot water storage tank 12 for storing hot water obtained by the refrigerant heat exchanger (5), a hot water storage tank 12 and a water intake pipe 13 for introducing tap water into the radiator (water-refrigerant heat exchanger) 5, a hot water storage tank 12 and a radiator (Water-refrigerant heat exchanger) 5 supplies hot water to the faucet or shower hot-water supply terminal 14 and hot water in the hot water storage tank 12 to the radiator (water-refrigerant heat exchanger) 5 The hot water supply circulating water pump 16 is configured.

  The heat pump heat source device in which the components shown in FIG. 4 are laid out is shown in FIGS. 1, 2, and 3. FIG. 2 is a sectional view showing a broken line portion C in FIG. 1, and the assigned numbers are the same as those in FIG. is there. FIG. 5 is a perspective view of a radiator (water-refrigerant heat exchanger) 5 which is a main component. Here, description will be made with reference to FIGS. 1, 2, 3 and 5.

First, the radiator (water-refrigerant heat exchanger) 5 is shown. FIG. 5 shows a perspective view of the radiator 5 (water-refrigerant heat exchanger) 5. The radiator (water-refrigerant heat exchanger) 5 is a heat exchanger having a double pipe structure in which a refrigerant pipe 5a made of a copper pipe is arranged inward and a water pipe 5b made of a copper pipe is arranged on the outer side. As shown in FIG. 5, it is configured in a spiral shape so as to be compact. The flow of the fluid in the refrigerant pipe 5a and the water pipe 5b of the radiator (water-refrigerant heat exchanger) 5 is an opposite flow, and the refrigerant pipe 5a included in the refrigerant circuit 8 is pressurized to a high pressure by the compressor 4. The compressed and discharged high-temperature refrigerant is connected to the radiator (water-refrigerant heat exchanger) 5 from the uppermost front side. Also in the water pipe 5b, the water is heated upward from the lowermost part, and the hot water having a high temperature is guided to the pipe 3 from the uppermost front side. In FIG. 5, the flow of water is indicated by a solid line, and the flow of refrigerant is indicated by a dotted line. As shown in FIG. 3, the forward and return refrigerant pipes 5 a and the forward and return water pipes 5 b connected to the radiator (water-refrigerant heat exchanger) 5 are arranged on the front surface of the compressor 4. Through.

  The radiator (water-refrigerant heat exchanger) 5 is placed on the bottom plate 17 at the bottom of the heat pump heat source unit 1. The compressor 4 is also placed on the bottom plate 17.

  Reference numeral 18 denotes a radiator heat insulating material as a heat insulating material that covers the periphery of the heat radiator (water-refrigerant heat exchanger) 5 in order to enhance the heat insulating property of the heat radiator (water-refrigerant heat exchanger) 5, such as polystyrene foam. It is composed of heat insulating material. The radiator heat insulator 18 has a shape in which the radiator (water-refrigerant heat exchanger) 5 is sandwiched between the upper radiator insulator 18a and the lower radiator insulator 18b. The lower radiator heat insulating material 18b is placed on the bottom plate 17 so as to engage with the concavo-convex portion of the flat portion of the bottom plate 17, and a radiator (water) is placed inside the lower radiator heat insulating material 18b. -Refrigerant heat exchanger) 5 is placed, and then the radiator (water-refrigerant heat exchanger) 5 is covered so as to cover the upper radiator heat insulator 18a. At this time, the upper radiator heat insulating material 18a is thicker than the lower radiator heat insulating material 18b.

  19 is a cover body arranged outside the upper radiator heat insulator 18a and the lower radiator heat insulator 18b, and covers the front, rear, left and right upper surfaces of the upper radiator heat insulator 18a and the lower radiator heat insulator 18b. It has become. However, although the structure using the heat sink heat insulating material 18 and a separate part is illustrated here as the cover body 19, the cover body 19 is replaced with the heat radiator heat insulating material 18 (the upper heat sink heat insulating material 18 a and the lower heat sink heat insulating material. 18b) can also be used.

  Reference numeral 7 denotes an air-refrigerant heat exchanger as an evaporator, which is bent into a substantially L shape so as to cover the rear lateral portion of the radiator (water-refrigerant heat exchanger) 5 as illustrated in the top view. It has a shape and is placed on the bottom plate 17. This air-refrigerant heat exchanger 7 is composed of a heat collecting heat exchanger formed by penetrating a plurality of fins 7c with a plurality of heat transfer tubes 7d, and a plurality of the heat collecting heat exchangers are provided. Is the outer row heat collection heat exchanger 7a, and the front is the inner row heat collection heat exchanger 7b. The two heat collection heat exchangers have substantially the same height as shown in FIG. It is not in the form of intentionally providing a gap.

  Reference numeral 9 denotes a blower fan disposed inward of the air-refrigerant heat exchanger 7 and above the cover body 19. The air is forced to pass through the air-refrigerant heat exchanger 7 to exchange heat between the air and the refrigerant. Promote. Reference numeral 20 denotes a blower motor that drives the blower fan 9, 21 denotes a motor base that holds the blower motor 20, and the motor base 21 is fixed to the upper surface of the cover body 19. Reference numeral 22 denotes a partition plate for separating the blower fan 9 and the radiator (water-refrigerant heat exchanger) 5 portion from the decompression means 6 portion such as the compressor 4 and the expansion valve. The forward and return refrigerant pipes 5a and the forward and return water pipes 5b of the radiator (water-refrigerant heat exchanger) 5 pass through the lower part of the front surface of the partition plate 22.

  Reference numerals 23 and 24 denote a pipe connector forward and a pipe connector return for connecting the pipe 3 to the return and return water pipes 5b of the radiator (water-refrigerant heat exchanger) 5, respectively. 25 is a right plate for covering from the right side, 26 is a left plate for covering from the left side, 27 is a top plate for covering from above, and 28 is a front plate for covering from above. It is a front plate for covering.

  The front plate 28 which is the exterior body has a blowout port 28a concentric with the blower fan 9, and the blowout port 28a is concentrically formed with the blower fan 9 from the inner peripheral surface to the outer side in the radial direction. An aperture-shaped bell mouth 28b that curves in a substantially semicircular shape is provided.

  The blower fan 9 is rotated by the blower motor 20, sucked from the air-refrigerant heat exchanger 7 upstream of the blower fan 9, and releases blown air from the blowout port 28 a of the front plate 28 in front of the blower fan. The bell mouth 28b arranged so as to cover the outer periphery of the blower fan 9 alleviates the occurrence of vortex around the blower fan 9 and generates a smooth blowing air, thereby improving the blowing efficiency and reducing noise. Realized.

  29 is a blow grill having a grid-like opening for allowing the blown air from the blower fan 9 to pass therethrough, and is provided in a protruding shape in front of the blow outlet 28a of the front plate 28 to rectify the blown air. While reducing noise, it plays a role of protecting the blower fan 9 from being touched.

  Moreover, the refrigerant | coolant currently used for the refrigerant circuit 8 which is the heat pump type | mold refrigerating cycle of the heat pump heat source machine 1 is made into the carbon dioxide gas.

  Hereinafter, the operation of the heat pump heat source apparatus will be described based on the drawings.

  When the compressor 4 is operated, the refrigerant compressed and discharged to a high pressure is sent to a radiator (water-refrigerant heat exchanger) 5 and is piped by the power of a hot water supply circulating water pump 16 from below the hot water storage tank 12. Heat is exchanged with the low-temperature water that has passed through 3 to radiate heat. Thereby, the heated low temperature water turns into high temperature water, passes the piping 3, is sent to the hot water storage tank 12, and is stored as hot hot water.

  The refrigerant flowing out of the radiator (water-refrigerant heat exchanger) 5 is decompressed and expanded by the decompression means 6 such as an expansion valve, and sent to the air-refrigerant heat exchanger 7 that is an evaporator. It exchanges heat with the sent air and evaporates and gasifies while passing through the air-refrigerant heat exchanger 7 which is an evaporator.

  This gasified refrigerant is again sucked into the compressor 4 and is repeatedly compressed, and the low-temperature water is gradually heated. The hot water that has been heated and stored in the hot water storage tank 12 is mixed with the low-temperature water that has passed through the inlet pipe 13, becomes hot water of a predetermined temperature, passes through the hot water supply pipe 15, and is supplied from the hot water supply terminal 14 of the faucet or shower. By doing so, it operates as a water heater.

  At this time, the radiator (water-refrigerant heat exchanger) 5 has a function of heating the water sent from the tank unit 2 in the refrigerant circuit 8 to make hot water. Then, the heated water is returned to the tank unit 2 and stored in the hot water storage tank 12 at a high temperature.

  Therefore, the radiator (water-refrigerant heat exchanger) 5 is made of copper having high thermal conductivity and excellent corrosion resistance, and the refrigerant flows through the copper pipe, which is a water pipe 5b through which water flows. It is a double tube incorporating the copper tube of the tube 5a. In particular, carbon dioxide is used here as the refrigerant, and its pressure is about three times that of the refrigerant (R-410A) used in the air conditioner, and the maximum is 12 MPa. The wall thickness of the tube is increased. Furthermore, in order to perform heat exchange, the length is also very long with 10 m or more. Therefore, it is designed to be compact by being spirally wound, and is sized to be placed above the bottom plate 17.

In this radiator (water-refrigerant heat exchanger) 5, water is guided from the lowermost part, heated halfway upward, and hot water having a high temperature is guided from the uppermost front side to the pipe 3. It has become. This is because the power of the hot water supply circulating water pump 16 can be reduced by introducing buoyancy by guiding the water having a high temperature and a reduced density from above. The hot water that has reached a high temperature passes through the notch in front of the partition plate 22, and the forward and backward refrigerant pipes 5 a and the forward and backward water pipes 5 b of the radiator 5 pass through the front surface of the compressor 4.

  However, since the water pipe 5a, the refrigerant pipe 5b, and the blower fan 9 that are at high temperatures are opposed to each other, the airflow 30 around the blower fan 9 and the bell mouth 28b cools the cover body 19 as shown in FIG. Then, the inner upper radiator heat insulating material 18a is cooled, and consequently, the high temperature side water pipe 5b and the refrigerant pipe 5a of the radiator (water-refrigerant heat exchanger) 5 are cooled. On the other hand, by increasing the thickness of the upper radiator heat insulating material 18a, it becomes possible to suppress the cooling, so that the radiator (water-refrigerant heat exchanger) 5 that has reached a high temperature is cooled, and the temperature Can be prevented, and as a result, efficiency can be prevented from decreasing, and an efficient heat pump heat source machine can be obtained.

  At that time, increasing the thickness of the upper radiator heat insulating material 18a causes the upper cover body 19 to shift upward, and as a result, the bell mouth 28b that requires a certain gap from the cover body shifts upward. As a result, the main body itself becomes large. As a result, the compactness is impaired, the installation space is restricted, and the material cost is increased accordingly, leading to an increase in cost. Therefore, instead of the upper radiator heat insulating material 18a, the lower radiator heat insulating material 18b is made thinner than the upper radiator heat insulating material 18a, thereby adding the upper radiator heat insulating material 18a and the lower radiator heat insulating material 18b. The height of the heat insulator 18 is the same as that of the conventional example, so that the main body height is not increased.

  Thereby, it can be said that this invention is very effective in order to improve performance, keeping a main body as compact as possible.

  Further, the radiator (water-refrigerant heat exchanger) 5 is formed by spirally winding a copper tube as shown in FIG. 5 and is placed inside the lower radiator heat insulating material 18b. The compressor 4, which should be called a vibration source, is also placed on the bottom plate 17.

  Therefore, the vibration of the compressor 4 is transmitted to the radiator (water-refrigerant heat exchanger) 5 through the bottom plate 17 and the lower radiator heat insulating material 18b. This is a route from the bottom, but besides that, from the compressor 4 through the partition plate 22, from the partition plate 22 through the cover body 19, from the upper radiator heat insulating material 18a to the radiator (water-refrigerant heat). There is also a route that leads from above to the (exchanger) 5. For this reason, in the radiator (water-refrigerant heat exchanger) 5, the spiral copper tube vibrates slightly, and the collision sound of the copper tube due to the vibration is transmitted to the outside and may become abnormal sound.

  On the other hand, by making the upper radiator heat insulating material 18a thick, it is possible to prevent upward sound leakage. In actual use, since the lower part of the heat pump heat source unit 1 main body unit is often the ground, the downward sound is not a problem. On the other hand, upward sound leakage is a problem because it leaks to a height close to a human living space. By preventing the sound from leaking upward, abnormal noise can be prevented, and a heat pump heat source machine that can reduce noise can be obtained.

  This means that if the noise is the same, the rotational speed of the blower fan 9 can be increased and the air volume can be increased. This increases the air volume passing through the air-refrigerant heat exchanger 7 as an evaporator, and evaporates. It is possible to improve the heat exchange characteristics of the air-refrigerant heat exchanger 7 which is a heat exchanger, and to improve the COP of the heat pump heat source machine, and to make an energy saving heat pump heat source machine.

  Up to this point, the upper radiator heat insulating material 18a has been made thicker than the lower radiator heat insulating material 18b, but the upper radiator heat insulating material 18a has a higher density than the lower radiator heat insulating material 18b. The same effect can be obtained by increasing the height. This is because the thermal conductivity can be lowered by increasing the density.

  The refrigerant circuit 8 of the outdoor unit of the heat pump heat source apparatus 1 is preferably operated at a pressure exceeding the critical pressure using carbon dioxide as the refrigerant. Since the boiling temperature can be increased by using carbon dioxide as a refrigerant, it is possible to increase the amount of heat that can be used and to prevent the hot water from running out. By using carbon dioxide, which is relatively inexpensive and stable, as a refrigerant, product cost can be reduced and reliability can be improved. In addition, carbon dioxide has an ozone depletion coefficient of zero and a global warming coefficient of about 1/700 of the alternative refrigerant HFC-407C, which is very small.

  However, even if it is other refrigerants, there is no particular restriction on the configuration of the present invention.

  In addition to storing hot water in the hot water storage tank 12, any outdoor unit equipped with a radiator such as a heating tank, floor heating, or hot water heating that requires heat insulation may be used for various heating devices.

(Embodiment 2)
FIG. 6 is a cross-sectional view of a main part of the heat pump heat source apparatus according to the second embodiment of the present invention, and the operation of the refrigerant circuit 8 is the same as that of the first embodiment. Hereinafter, differences from the first embodiment will be described.

  A rear radiator in a direction facing the air-refrigerant heat exchanger 7 that is an evaporator, of a radiator heat insulator 18 that is made of a heat insulating material such as polystyrene foam and covers the radiator (water-refrigerant heat exchanger) 5. The heat insulating material 18c is thicker than other parts.

  The air that is sucked into the blower fan 9 and is lower than the air temperature that has passed through the air-refrigerant heat exchanger 7 that is an evaporator becomes a flow 31 that passes through the back of the cover body 19. Although this flow 31 cools the cover body 19, the rear radiator heat insulating material 18 c, and the inner radiator (water-refrigerant heat exchanger) 5, there is a risk of causing a decrease in efficiency. By making the side radiator heat insulating material 18c thick, cooling can be prevented and efficiency can be improved.

  In this case, increasing the thickness of the rear radiator heat insulating material 18c means that the upper cover body 19 shifts backward, and as a result, the air which is an evaporator that requires a certain gap from the cover body 19− The refrigerant heat exchanger 7 shifts backward, and as a result, the main body itself becomes large. As a result, the compactness is impaired, the installation space is restricted, and the material cost is increased accordingly, leading to an increase in cost. Therefore, instead of the rear radiator heat insulating material 18c, the front heat radiator heat insulating material 18d is made thinner than the rear heat radiator heat insulating material 18c, thereby adding the rear heat radiator heat insulating material 18c and the front heat radiator heat insulating material 18d. The depth length is the same as that of the conventional example, so that the size of the main body is not increased.

  In particular, the front radiator heat insulating material 18d is not cooled by being blown by the blower fan 9, and does not pass through the front heat insulating material 18d. Therefore, even if it is thinner than the rear heat radiator insulating material 18c, the performance is not deteriorated.

  Thereby, it can be said that the content of the present invention is very effective for improving the performance while keeping the main body as compact as possible.

(Embodiment 3)
FIG. 7 is a cross-sectional view of a main part of the heat pump heat source apparatus according to the third embodiment of the present invention, and the operation of the refrigerant circuit 8 is the same as that of the first embodiment. Hereinafter, differences from the first embodiment will be described.

  A vacuum heat insulating material 32 is disposed on the upper inner surface of the heat insulating material 18 made of a heat insulating material such as foamed polystyrene, which covers the heat radiator (water-refrigerant heat exchanger) 5. The vacuum heat insulating material 32 is said to have a thermal conductivity of about 1/10 that of polystyrene foam. That is, in order to maintain the same heat insulating material as that of the polystyrene foam, the thickness may be 1/10.

  Therefore, the water pipe 5b or the refrigerant pipe 5a that has reached a high temperature and the blower fan 9 face each other, so that the airflow 33 around the blower fan 9 and the bell mouth 28b cools the cover body 19 as shown in FIG. Then, the radiator heat insulating material 18 inside thereof is cooled, and consequently the water pipe 5b and the refrigerant pipe 5a on the high temperature side of the radiator (water-refrigerant heat exchanger) 5 are cooled. On the other hand, by providing the vacuum heat insulating material 32, it becomes possible to suppress the cooling, so that the heat radiator (water-refrigerant heat exchanger) 5 having a high temperature is cooled and the temperature is lowered. It can prevent that efficiency falls and it can be set as an efficient heat pump heat source machine.

  In that case, since the vacuum heat insulating material 32 can be made thin with the same heat insulating performance, the main body dimensions of the heat pump heat source unit 1 can be made to be a low-profile and compact heat pump heat source unit.

  As described above, the heat pump heat source apparatus according to the present invention is a compact heat pump heat source apparatus that can improve efficiency and reduce noise. It can be used for heating equipment and facilities, and can achieve high efficiency improvement and low noise.

DESCRIPTION OF SYMBOLS 1 Heat pump heat source machine 2 Tank unit 3 Piping 4 Compressor 5 Radiator (water-refrigerant heat exchanger)
6 Pressure reducing means 7 Evaporator (Air-refrigerant heat exchanger)
DESCRIPTION OF SYMBOLS 8 Refrigerant circuit 9 Blower fan 10 Hot water supply cycle 12 Hot water storage tank 13 Intake pipe 14 Hot water supply terminal 15 Hot water supply pipe 16 Hot water circulating water pump 17 Bottom plate 18 Heat radiator heat insulating material 18a Upper heat radiator heat insulating material 18b Lower heat radiator heat insulating material 18c Rear heat radiation Heat insulator 18d Front radiator heat insulator 19 Cover body 20 Blower motor 21 Motor base 22 Partition plate 28 Front plate 28a Air outlet 28b Bell mouth 32 Vacuum heat insulator

Claims (5)

A compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that circulates the refrigerant by connecting the evaporator in an annular manner with a refrigerant pipe, a blower fan that conveys air to the evaporator, and the water-refrigerant heat exchange A heat pump heat source apparatus comprising a heat insulating material covering the periphery of the vessel, wherein the heat insulating material above the water-refrigerant heat exchanger is thicker than the heat insulating material below the water-refrigerant heat exchanger. The heat pump heat source according to claim 1, wherein the heat insulating material is placed on a bottom plate of an exterior body, and a heat insulating material in a direction facing the blower fan is thicker than a heat insulating material in a direction facing the bottom plate. Machine. 2. The heat pump heat source apparatus according to claim 1, wherein the heat insulating material is placed on a bottom plate of an exterior body, and a heat insulating material in a direction opposite to the evaporator is thicker than a heat insulating material on the opposite side. A compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that circulates the refrigerant by connecting the evaporator in an annular manner with a refrigerant pipe, a blower fan that conveys air to the evaporator, and the water-refrigerant heat exchange A heat insulating material covering the periphery of the vessel, and among the heat insulating materials, the density of the heat insulating material above the water-refrigerant heat exchanger is higher than the density of the heat insulating material below the water-refrigerant heat exchanger. A heat pump heat source machine. A compressor, a water-refrigerant heat exchanger, a decompression unit, a refrigerant circuit that circulates the refrigerant by connecting the evaporator in an annular manner with a refrigerant pipe, a blower fan that conveys air to the evaporator, and the water-refrigerant heat exchange A heat pump heat source machine comprising a heat insulating material covering the periphery of the vessel, wherein at least a part of the heat insulating material above the water-refrigerant heat exchanger is a vacuum heat insulating material.