KR100617405B1 - Heat pump type hot water supply device - Google Patents

Abstract

An object of the present invention is to miniaturize a hot water supply apparatus in consideration of workability and the like, and to always supply hot water at a suitable temperature to a user without having a large capacity tank.

A water refrigerant heat exchanger (103) for performing heat exchange between the compressors (105a, b) for compressing the refrigerant, a refrigerant flow path through which the refrigerant compressed by the compressor flows, and a water flow path through which water supplied from the water supply circuit flows; A decompression device 104 for depressurizing the refrigerant having a temperature lowered by the heat exchanger, evaporators 105a and b for evaporating the refrigerant depressurized by the decompression device and returning it to the compressor, and hot water heated in the water refrigerant heat exchanger. A water storage tank 130 is connected to a hot water supply pipe supplied to the hot water supply port, and the water storage tank has a cylindrical outer shell, and is disposed in the transverse space of the evaporator with the cylindrical axis of the outer shell vertically, and the compressor has a cylindrical outer shell. The cylindrical shaft of this outer shell is arrange | positioned laterally and the heat pump hot water supply apparatus is comprised.

Evaporator, compressor, heat exchanger, boiling tank, decompression device

Description

Heat pump hot water supply device {HEAT PUMP TYPE HOT WATER SUPPLY DEVICE}

BRIEF DESCRIPTION OF THE DRAWINGS The front view of the heat pump hot water supply apparatus of one Embodiment of this invention removes a front plate.

2 is a system configuration diagram of the heat pump hot water supply device of FIG. 1;

FIG. 3 is a top view of the heat pump hot water supply device of FIG. 1, with the electrical component box 4 of FIG. 1 removed and shown. FIG.

FIG. 4 is a configuration diagram of the inside viewed downward from line IV-IV of FIG. 1; FIG.

5 is a cross-sectional view taken along the line V-V of FIG.

Description of the main parts of the drawing

1: heat pump hot water supply device

2: cabinet

3, 8: partition plate

4, 5: electrical parts box

6: base

7: legs

10: storage room

12: seam attachment plate

13: saucer

102a, b: compressor

103: water refrigerant heat exchanger

104a, b: expansion valve

105a, b: evaporator

106a, b: fan

130: water storage tank

[Document 1] Japanese Unexamined Patent Application Publication No. 9-126547

[Document 2] Japanese Unexamined Patent Publication No. 2002-310499

[Document 3] Japanese Unexamined Patent Publication No. 2004-69195

[Document 4] Japanese Unexamined Patent Publication No. 2003-279133

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump hot water supply device, and more particularly, to a technique for facilitating installation and ease of transportation of a so-called instant heat pump hot water supply device having a small capacity storage tank or a water tank.

Conventional hot water supply apparatus has a combustion hot water heater which does not have a water tank and burns water with its strong combustion heat to supply hot water instantaneously, or has a large capacity water tank, and uses nighttime low-cost electric power at night. There was an electric water heater using a large amount of hot water heated by an electric heater in a water storage tank and using the hot water stored in the water storage tank during the day.

On the other hand, in recent years, the heat pump hot water supply device which is 300 to 500% of energy efficiency compared with an electric water heater has begun to spread. The heat pump hot water supply apparatus includes a water refrigerant heat exchanger for performing heat exchange between a compressor for compressing a refrigerant, a refrigerant flow path through which the refrigerant compressed by the compressor flows, and a water flow path through which water supplied from the water supply circuit flows, and the water refrigerant heat exchanger And a heat pump cycle comprising an expansion valve for reducing the refrigerant depressurized and an evaporator for evaporating the refrigerant depressurized by the decompression device and returning it to the compressor, and hot water heated by the water refrigerant heat exchanger. It is configured to use. Since the heat pump hot water supply device uses the heat amount of the surrounding space as a heat source, the energy efficiency is several times higher than that of electric heater heating, and since it does not burn gas or the like, it is called an environment-friendly hot water supply device because it does not emit CO ₂ . have.

However, since the heat pump hot water supply device does not have a strong amount of heat as in the case of burning gas, etc., a large-capacity storage tank is installed like an electric water heater, and hot water is boiled up by using a heat pump cycle at night using low-cost electricity at night. It was common to use stored hot water during the day.

For example, the heat pump hot water supply device described in Patent Document 1 is configured by installing a heat pump cycle part and a large water storage tank as separate devices, respectively, by connecting them by pipes, and the like. The hot water taken out and the tap water are mixed with a mixing valve to supply at an appropriate temperature. However, since a heat pump cycle part and a water storage tank are used as a separate apparatus, the construction of the water pipe which connects a heat pump cycle part and a water storage tank is needed in an installation place.

In this regard, the heat pump hot water supply apparatus described in Patent Document 2 is configured by storing a heat pump cycle and a storage tank for storing a large amount of hot water boiled by the heat pump cycle in one cabinet (housing). According to this, the inside of the cabinet is partitioned up and down by a partition plate, and the storage tank which becomes high temperature is arrange | positioned in the space below a partition plate, and the water refrigerant heat exchanger and compressor which become high temperature in the space below a storage tank are arrange | positioned, a partition plate The evaporator and the evaporator fan which become low temperature are arrange | positioned in the upper space. Moreover, the evaporator is arrange | positioned so that an outer skin may be formed along the front, side, or back surface of a cabinet.

On the other hand, in recent years, the heat pump hot water supply apparatus which can be instantaneous hot water supply without boiling water, ie, the instantaneous heat pump hot water supply apparatus, is developed. This instant type has the instantaneous heating capability and the direct hot water supply circuit which can boil only as much as necessary when using hot water without the need for a large-capacity storage tank, and thus can solve various problems of the low temperature type. For example, in the heat pump hot water supply apparatus introduced in Patent Document 3, hot water heated by a water refrigerant heat exchanger that heats water supply by refrigerant of a heat pump cycle is mixed with water branched from a water supply pipe to directly hot water. have. In addition, in the heat pump hot water supply apparatus introduced in Patent Document 4, in addition to the configuration of Patent Document 3, a small auxiliary water storage tank is provided for a short time until the start of the heat pump cycle, and hot water heated by a water refrigerant heat exchanger. By mixing the hot water stored in the water storage tank and the water branched from the water supply pipe, it is possible to provide a hot water supply with improved usability.

[Patent Document 1]

Japanese Patent Laid-Open No. 9-126547

[Patent Document 2]

Japanese Patent Laid-Open No. 2002-310499

[Patent Document 3]

Japanese Patent Laid-Open No. 2004-69195

[Patent Document 4]

Japanese Patent Laid-Open No. 2003-279133

However, the heat pump hot water supply device described in Patent Document 1 has good transportability because the heat pump cycle part and the water storage tank are divided into separate devices, but the workability is required because a water pipe for connecting the heat pump cycle part and the water storage tank must be provided locally. There is a problem of being bad. In this regard, since the heat pump hot water supply device described in Patent Document 2 is assembled by integrating the heat pump cycle portion and the water storage tank in the same cabinet, the workability is improved because there is no need for a water pipe in the field.

However, the heat pump hot water supply device described in Patent Documents 1 and 2 uses a low-cost nighttime power to store hot water in a storage tank at night and supplies water for daytime use. There is also a problem of requiring a large installation area or sufficient floor strength. For example, the heat pump type hot water supply device of Patent Document 2 stacks the heat pump cycle part and the water storage tank up and down. Thus, for example, when the capacity of the water storage tank is 300 to 500 liters, the height of the cabinet is greatly increased to 2000 mm. There is problem in installability and portability. That is, in the heat pump hot water supply apparatuses of the methods of Patent Documents 1 and 2, the height of the cabinet is around 2000 mm, and the depth of the eye becomes 500 mm or more. Moreover, when the heat pump hot water supply apparatuses of patent documents 1 and 2 run out of hot water, there existed a problem, such as taking time to boil up the hot water to be used next.

In this regard, the heat pump type hot water supply apparatuses of Patent Documents 3 and 4 are so-called instantaneous types, so that hot water can be boiled up and hot water relatively quickly, and the water storage tank can be miniaturized. However, the prior art described in Patent Documents 3 and 4 has room for improvement for miniaturization of the heat pump type hot water supply device. That is, when conveying a device in order to install a heat pump type hot water supply apparatus in a general apartment or single-family house, it may be heavy, and conveyance and installation work are very difficult. In particular, because of the long length, even if the device is upright in its state or knocked down to the side, it is inevitable to use a staircase because it can not be loaded in a general elevator. Moreover, when conveying in the state fell to the side, since the dimension of a horizontal direction becomes large, there exists a problem that a passage | pass does not bend in stairs corner parts, such as a narrow mansion.

From this point of view, the heat pump type hot water supply apparatus described in Patent Document 3 has a major device in the height direction for the purpose of space saving, so the height of the apparatus is very high, and there is a problem in conveyance during installation. In addition, the heat pump type boiling water device described in Patent Document 4 has a heat pump cycle part and a water storage tank side by side in a cabinet, are housed in a cabinet, integrated, and miniaturized. However, although the compressor is provided in the storage space of the space below the evaporator, since the cylindrical compressor is installed upright, there is a possibility that the heat dissipation area of the evaporator may be insufficient if the device height (length) is to be reduced. For example, if the heat dissipation area is to be sufficiently secured, it is conceivable to arrange the compressor storage chamber in the projection area of the evaporator heat dissipation area, but there is a problem in that the flow of the anti-airflow airflow in the overlapped areas is deteriorated and the heat exchange efficiency is lowered. If the heat exchanger is damaged, frost adheres to the frost, and freezing occurs. In particular, if the heat exchanger proceeds to freezing of the support plate of the defrosting water, the function of the heat pump hot water supply device may be lost.

An object of the present invention is to miniaturize a hot water supply device in consideration of workability and the like, and to supply hot water at an appropriate temperature to a user at all times without having a large capacity tank.

In order to solve the above problems, the present invention adopts a heat pump hot water supply device capable of reducing the capacity of a water storage tank and enabling instant hot water supply. Characterized in that the hot water can be supplied.

That is, the heat pump hot water supply device of the present invention includes a compressor for compressing a refrigerant, a water refrigerant heat exchanger for performing heat exchange between a refrigerant flow path through which a refrigerant compressed by the compressor flows, and a water flow path through which water supplied from a water supply circuit flows; A pressure reducing device for depressurizing a refrigerant having a temperature lowered by the refrigerant heat exchanger, an evaporator for evaporating the refrigerant depressurized by the pressure reducing device to return to the compressor, and a hot water supply for supplying hot water heated by the water refrigerant heat exchanger to the hot water inlet. And a storage tank communicating with the pipe, wherein the storage tank has a cylindrical outer shell and is disposed in a transverse space of the evaporator with the cylindrical axis of the outer shell vertically, and the compressor has a cylindrical outer shell. It is characterized in that the cylindrical axis is arranged in the transverse direction.

In general, the height dimension of the heat pump hot water supply device is dominated by the height of the evaporator or the height of the storage tank, and the width or depth dimension is dominated by the heat dissipation area of the evaporator or the capacity of the storage tank. In addition, the compressor is also a relatively large component, which affects the height, width and depth dimensions of the device. Thus, in the present invention, the cylindrical water storage tank is vertically arranged in the horizontal space of the evaporator. In addition, the compressor formed in the cylindrical shape is characterized in that the cylindrical shaft is arranged in the transverse direction, so that the height dimension of the compressor relative to the apparatus can be reduced so that the compressor can be accommodated in the space below any one of the evaporator and the water storage tank. Therefore, according to the present invention, the required heat dissipation area of the evaporator and the storage tank of the evaporator can be provided so as to suppress the height, the width, and the depth dimension of the apparatus in a desired manner, and to accommodate the compressor in a space below either one of the evaporator and the storage tank. By setting these dimensions organically in accordance with the required capacity, the device can be miniaturized.

In this case, it is preferable to arrange a compressor in the partitioned storage chamber mentioned later. According to this, the temperature in the storage chamber rises due to the heat generation of the compressor, the temperature of the compressor rises, and the temperature of the discharged refrigerant rises. As a result, the amount of heat that can be recovered in the water refrigerant heat exchanger is increased, thereby improving the heating capacity of the heat pump cycle, reducing the capacity of the boiling water tank and contributing to the miniaturization of the apparatus.

In addition, the storage chamber of the compressor is preferably formed in a space below the evaporator. According to this, the height dimension of a water storage tank can be made equal to the height of an apparatus, and if the capacity | capacitance is made constant, the diameter of a water storage tank can be made small, and the width | variety and depth of an apparatus can be made small.

The water-cooling heat exchanger is preferably formed by joining the heat transfer tubes constituting the refrigerant passage and the heat transfer tubes constituting the water flow passage in a coil shape, and arranging the storage tank inside the coil. According to this, since the storage tank can be arrange | positioned using the space which the water refrigerant heat exchanger occupies effectively, the occupied space can be made small as a whole.

Moreover, according to this invention, the capacity of a water storage tank can be up to 100 liters, and the height dimension of the said heat pump hot water supply apparatus can be up to 1600 mm. In addition, the storage tank can have a height of up to 1200 mm and a capacity of up to 100 liters.

Further, in any one of the heat pump hot water supply apparatus, a temperature sensor that detects the temperature of the hot water supplied from the water refrigerant heat exchanger, and when the temperature of the hot water detected by the temperature sensor is lower than or equal to the set temperature, is stored in the storage tank. And a control unit for supplying hot water to the hot water supply pipe and mixing the hot water with the hot water supplied from the water refrigerant heat exchanger. And a temperature sensor for detecting the temperature of the hot water supplied from the hot water supply port, and a control unit for mixing the water from the water supply circuit with the hot water from the hot water supply port when the temperature of the hot water detected by the temperature sensor is equal to or higher than the set temperature. Can be configured.

Moreover, two sets of heat pump cycles which consist of a compressor, a water refrigerant heat exchanger, a decompression device, and an evaporator can be provided, and the compressor of each set of heat pump cycles can be installed in a storage chamber. As a result, the heating capacity of the hot water supply can be enhanced, and both the discharge gas temperature can be increased, and the compressor can be downsized, so that the height of the apparatus can be reduced.

Moreover, it is preferable to dispose a compressor and a water storage tank to the back side rather than the center of the said heat pump hot water supply apparatus. As a result, since the center of gravity of the device can be located on the rear side, it is possible to prevent the device from falling to the front side, for example, the passage side, in the event of an earthquake. As a result, the user can use it with confidence. In addition, since a space is formed on the front face side of the apparatus, it is possible to secure a space in which the member for connecting the external pipe and the internal pipe and the electric component are arranged.

An embodiment of the present invention will be described with reference to FIGS. 1 is a front view of the heat pump hot water supply apparatus according to the present embodiment, in which the front face plate is removed. 2 is a system configuration diagram of a heat pump hot water supply device according to the present embodiment. FIG. 3 is a top view of the heat pump hot water supply device of FIG. 1, with the electrical component box 4 of FIG. 1 removed. FIG. 4 is a configuration diagram of the inside viewed downward from the line IV-V of FIG. 1. FIG. 5 is a cross-sectional view taken along the line V-V of FIG.

As shown in Fig. 2, the heat pump hot water supply apparatus according to the present embodiment includes two sets of heat pump hot water supply circuits 101a and b constituting a heat pump cycle and is configured to ensure instant hot water supply capability. Carbon dioxide gas refrigerant | coolant is enclosed with each heat pump hot water supply circuit 101a, b as a refrigerant | coolant, respectively. As the refrigerant of the heat pump hot water supply device, a carbon dioxide gas refrigerant which can be used in the supercritical region and which is a natural refrigerant is preferable, but the present invention is not limited thereto.

The high temperature refrigerant compressed by the compressors 102a and b constituting the heat pump hot water supply circuits 101a and b is respectively reduced in pressure through the refrigerant-side heat transfer tubes 103a and b provided in the water refrigerant heat exchanger 103. The evaporators 105a and b are led through the phosphorus expansion valves 104a and b to evaporate, and are returned to the compressors 102a and b again. Fans 106a and b are respectively installed in the evaporators 105a and b.

The compressors 102a and b are formed to be capable of volume control, and are operated at a large capacity when a large amount of hot water is supplied. That is, the compressors 102a and b are controlled from low speed (e.g., 1000 revolutions per minute) to high speed (e.g., 8000 revolutions per minute) by PWM control, voltage control (e.g. PAM control), or a combination control thereof. It is comprised so that control of rotation speed is possible. The expansion valves 104a and 104b radiate heat in the water refrigerant heat exchanger 103 to depressurize the high-pressure refrigerant whose temperature has decreased, and introduce the two-phase refrigerant into the evaporators 105a and b. The evaporators 105a and b are configured to exchange heat between the air and the refrigerant by outdoor air flowing through the fan 106 to evaporate the low temperature and low pressure refrigerant.

The water-cooled heat exchanger 103 is installed so as to correspond to the refrigerant-side heat transfer tubes 103a and b, respectively, and the water supply-side heat transfer tubes 103c and d are thermally coupled to each other. The water to be heated is supplied via 110. The water supply circuit 110 includes a water supply member 111, a pressure reducing valve 112, a water supply water sensor 113, a solenoid valve 116 (which can be omitted), a check valve 114, and a flow rate connected to a water supply source such as tap water. The sensor 115 is connected in order by piping. The branching of the pipes to the water supply side heat transfer tubes 103c and 103d at the inlet side of the water refrigerant heat exchanger 103 is for reducing the pressure loss in the water supply circuit 110. In addition, the refrigerant side heat transfer tubes 103a and b and the water supply side heat transfer tubes 103c and d of the water refrigerant heat exchanger 103 are formed such that the flow of the refrigerant and the flow of the water supply are opposed to each other. Heat exchange is performed between low temperature water. That is, water that has been low temperature at the inlet of the water supply side heat transfer tubes 103c and d is gradually heated as it passes through the water supply side heat transfer tubes 103c and 103d, and is set by the operation control means at the outlet of the water supply side heat transfer tubes 103c and 103d. The temperature is raised to a temperature close to the temperature.

The high temperature hot water discharged from the outlets of the water supply side heat transfer tubes 103c and 103d is supplied from the hot water supply member 121 to the hot water supply port via the hot water supply circuit 120. That is, the hot water supply circuit 120 sequentially connects the outlets of the water supply side heat transfer tubes 103c and 103d, the first mixing valve 122, the second mixing valve 123, and the flow rate adjustment valve 124 by piping. It is connected to the hot water supply member 121, and is comprised. The first mixing valve 122 is connected to the top of the water storage tank 130 by a pipe line. As a result, the first mixing valve 122 stores the high temperature hot water heated by the water refrigerant heat exchanger 103 in the water storage tank 130, and the hot water heated by the water refrigerant heat exchanger 3. It is comprised by the function which mixes hot water of the water storage tank 130, adjusts to the preset temperature set by operation control means, and hot water supply. In addition, a water pipe path branched from the downstream side of the feed water flow rate sensor 113 of the feed water circuit 110 is connected to the second mixing valve 123, thereby supplying the hot water of the hot water supply circuit 120 to the high temperature hot water. The water supplied from 110 can be mixed and adjusted to a set temperature (about 35 ° C. to 60 ° C.) set by the operation control means. The hot water adjusted to the set temperature in this manner is supplied from the hot water supply member 121 to the use place via the flow rate adjusting valve 124. In addition, the flow regulating valve 124 is a proportional valve which limits the amount of hot water supply in order to enable hot water supply of a predetermined temperature or more in response to the heating capacity of the heat pump cycle 101. It is supposed to be.

On the other hand, the bottom part of the water storage tank 130 is connected to the upstream side of the check valve 110 of the water supply circuit 110 via the pipe 131, and is connected to the inlet port of the circulation pump 133 via the pipe 132. It is. The discharge port of the circulation pump 133 is connected to the downstream side of the check valve 114 of the hot water supply circuit 110 via the pipe 134. As a result, hot water is extracted from the bottom of the water storage tank 130 and heated through the water supply side heat transfer tubes 103c and d of the water refrigerant heat exchanger 103, and then the water storage tank 130 of the water storage tank 130 passes through the first mixing valve 122. The boil-up circulation system is returned to the top. In addition, the hot water in the water storage tank 130 is extruded by the water supply pressure supplied through the water supply member 111 and is supplied to the hot water supply member 121 via the first mixing valve 122. In addition, the drain valve 135 is provided in the bottom part of the water storage tank 130, and the relief valve 136 is provided in the connection piping with the water storage tank 130 of the 1st mixing valve 122. As shown in FIG.

Next, the hot water supply circuit and the cold bath reheating circuit to the bathtub 140 will be described. The bath 140 can be directly poured from a hot water supply (not shown) connected to the hot water supply member 121. However, the pouring circuit can be configured as shown. That is, the pouring circuit branches from the downstream side of the flow regulating valve 124 to install the pouring solenoid valve 141, and the outlet side of the pouring solenoid valve 141 is flow-flow switch 142 and the cooling bath water reheating pump ( 143, the water level sensor 144, and the pouring member 145 are connected in order by piping. And the pouring member 145 is connected to the bottom part of the bathtub 140 via piping. The pouring solenoid valve 141 is provided with a check valve, a water quantity sensor, and an air release valve.

On the other hand, the cold bath water reheating circuit pumps hot water in the bath from the pipe connected to the bottom portion to the bath 140 via the water level sensor 144 and the pouring member 145 by the cold bath water reheating pump 143, The cooling water is led to the reheating heat exchanger 147 through the conduit line 146 branched from the pouring solenoid valve 141 side of the flow switch 142 to be heated. The warm water reheated in the cold bath reheating heat exchanger (147) is configured to return from the cold bath reheating pouring member (149) to the bottom of the tub (140) via a pipe (148).

The cold bath water reheating heat exchanger 147 is formed by thermally coupling the hot water side heat exchanger tube 147a and the cold bath water reheating side heat exchanger tube 147b. One end of the hot water side heat transfer pipe 147a is connected to the upstream side of the first mixing valve 122 via the solenoid opening and closing valve 150 and the check valve 151, and the other end is connected to the suction side of the circulation pump 133. It is. Therefore, the hot water heated by the water refrigerant heat exchanger 103 is circulated and supplied to the hot water side heat transfer pipe 147a of the cold bath water heat exchanger 147 by driving the circulation pump 133, and the cold bath water is reheated. The return hot water in the bathtub 140 flowing through the side heat transfer pipe 147b is heated again.

In addition, the operation control means controls the operation and stop of the heat pump hot water supply circuits 101a and b and the rotational speed control of the compressors 102a and b based on the operation settings of the control circuit, the bathroom remote control and the kitchen remote control, and the detection values of the respective sensors. At the same time, the first mixing valve 122, the second mixing valve 123, the flow rate adjusting valve 124, and the like are controlled. Moreover, each sensor has a temperature sensor which detects the temperature state of each part, the pressure sensor which detects a pressure, the water quantity sensor which detects a quantity, and the like. In addition, the water storage tank 130 is provided with temperature sensors 137a to c for detecting the level of hot water temperature of a predetermined temperature or more and controlling the amount of hot water.

In this way, according to the present embodiment, when the tap of the hot water supply terminal connected to the hot water supply member 121 is opened, water introduced from the water supply member 111 flows into the water supply circuit 110 by the water pressure, When the water supply sensor 113 detects water supply, the operation of the heat pump hot water supply circuits 101a and b is started by the operation control means. As a result, the water flowing in the water supply circuit 110 is led to the water refrigerant heat exchanger 103 and heated by about heat to about 35 ° C. to about 60 ° C., and the heated hot water is directly heated through the second mixing valve 123. do. The hot water supply amount can be adjusted by adjusting the opening degree of the flow rate control valve 124.

The operation of the heat pump hot water supply circuits 101a and b operates the compressors 102a and b and the fans 106a and b so that the high temperature and high pressure carbon dioxide gas refrigerant is transferred to the refrigerant side heat transfer tube 103a of the water refrigerant heat exchanger 103. b), and heat-exchange with water flowing in the water supply side heat exchanger tubes 103c and d of the water refrigerant heat exchanger 103 to heat the water supply. The carbonic acid gas refrigerant cooled by water is depressurized by expansion valves 104a and b, and is introduced into evaporators 105a and b in two phases of the low temperature gas and the liquid. The refrigerant evaporated in the evaporators 105a and b becomes a low pressure gas refrigerant and is returned to the compressors 102a and b to form a heat pump cycle. In addition, the water in the lower portion of the water storage tank 130 is supplied to the water supply side heat transfer tubes 103c and d of the water refrigerant heat exchanger 103 by the circulation pump 133, and heated, and passes through the first mixing valve 122. The upper portion of the water storage tank 130 is returned. As a result, a water storage operation is performed in which high temperature hot water is sequentially stored from the upper portion in the water storage tank 130. By repeating this, when the whole water in the boiling water tank 130 turns into hot water of the set temperature, the operation of the compressors 102a and b and the fans 106a and b is stopped to stop the heat pump hot water supply circuits 101a and b.

In the heat pump hot water supply device of the present embodiment, the temperature of the hot water heated by the water refrigerant heat exchanger 103 is set to the operation control means for a short time until the operation of the heat pump hot water supply circuits 101a and b is started. It is lower than the predetermined hot water supply temperature to remove the hot water heated by the water refrigerant heat exchanger 103 and hot water of about 60 ℃ to 90 ℃ stored in the compact storage tank 130 of about 30 to 100 liters The mixture may be mixed in one mixing valve 122, and adjusted to hot water close to a predetermined temperature to supply hot water. In addition, by mixing the low temperature water branched from the water supply pipe by the second mixing valve 123, hot water of a predetermined hot water supply temperature (about 35 ° C to 60 ° C) set by the operation control means can be heated. Thus, this embodiment is a hot water supply apparatus which is small and excellent in usability. In addition, when the inlet port of the water storage tank 130 side of the first mixing valve 122 is opened, the high temperature hot water stored in the water storage tank 130 is extruded by the water pressure. In addition, when the operation of the heat pump hot water supply circuits 101a and b is started, hot water heated by the water refrigerant heat exchanger 103 is directly heated by the first mixing valve 122 and the second water mixing valve 123. It functions as a so-called instantaneous heat pump hot water supply device. As described above, according to the present embodiment, the hot water heated by the heat pump cycle 101 and the water refrigerant heat exchanger 103 is only heated when the predetermined temperature is not reached, such as when it starts. Since the hot water is supplied as hot water at a predetermined temperature by using the gas, the capacity of the storage tank 130 may be small.

Hereinafter, the structure of embodiment which accommodates the heat pump hot water supply apparatus which has the system comprised as mentioned above in one cabinet is demonstrated with reference to FIG. 1, FIG. In addition, in FIG. 2, the part of the bathtub 140 enclosed by the broken line 152, and the piping which connects the pouring members 145 and 149 and the bathtub 140 are contained in the structural member of the heat pump hot water supply apparatus of this embodiment. It doesn't work.

As shown in Figs. 1 and 3 to 5, the heat pump hot water supply device 1 divides the inside of the box-shaped cabinet 2 into partitions 3 into left and right spaces, and heat pumps in the space on the left side. The components 102, such as the compressors 102a and b, the evaporators 105a and b, the fans 106a and b, and the electrical component box 4, which constitute the cycle 101, are housed. On the other hand, in the space on the right side of the partition plate 3, a water refrigerant heat exchanger 103 formed in a coil shape, a cylindrical water storage tank 130 inserted into the coil of the water refrigerant heat exchanger 103, and a right space Component parts such as a bath water reheating heat exchanger 147 cooled in a corner portion (see FIGS. 3 and 4) on the rear side of the back side, and an electrical component box 5 located on the front surface side of the water refrigerant heat exchanger 103. This is housed. That is, the partition plate 3 is for blocking the air and heat-blocking the evaporator 105a, b side and the water storage tank 103 side. The base 6 of the bottom part of the cabinet 2 is floated from the installation surface by the leg 7, and is installed. In addition, as shown in FIG. 4, the partition plate 3 is bent so that it may rotate to the back surface side of the water storage tank 130 in the back surface side of the cabinet 2. As shown in FIG. Thereby, even if the width | variety of the cabinet 2 is narrowed, the required heat dissipation area of the evaporator 105a, b is ensured. The back side is a side facing the wall when installed.

The compressors 102a and b and the water storage tank 130 are respectively fixed to and supported by the base 6. In addition, the upper space in which the evaporators 105a and b and the fans 106a and b are provided, and the lower space in which the compressors 102a and b are installed, are partitioned by the partition plate 8. The partition plate 8 is formed so that the upper surface side and front surface side of the compressors 102a and b may be covered as shown in FIG. That is, the storage chambers 10 of the compressors 102a and b are partitioned by the base 6, the partition plate 8, the partition plate 3, and the front and rear walls and side walls of the cabinet 2. In particular, the compressors 102a and b have a cylindrical outer shell, and are arranged side by side in the cabinet 2 as shown in Fig. 4 with the cylindrical axis of the outer shell in the transverse direction.

The evaporators 105a and b have two refrigerant circuits which are divided into two upper and lower stages or are mixed. For example, the evaporators 105a and b are formed by the so-called cross fin tube heat exchanger which arrange | positioned the heat exchanger tube which comprises a refrigerant | coolant circuit in a zigzag shape, and attached several sheets of fins to the heat exchanger tube. In addition, the evaporators 105a and b are bent in an L shape to form most of one side and the rear surface of the cabinet 2, as shown in Figs. 1 and 3, and as an outline of the heat pump hot water supply apparatus 1 as shown in Figs. Formed. In addition, the fan 106a, b is attached to the attachment leg 11 provided along the evaporator 105a, b up and down as shown. The fans 106a and b blow air from the outside of the cabinet 1 to forcibly evaporate the low temperature and low pressure refrigerant in the evaporators 105a and b.

The electrical component box 4 forms an upper surface of the cabinet 2, and a control circuit for controlling the operation of the compressors 102a and b and the fans 106a and b is housed in the electrical component box 4. . Moreover, the electrical component box 5 is arrange | positioned in the front surface of the cabinet 2, and in the electrical component box 5, it heats by operation setting, such as a remote control of the heat pump hot water supply apparatus 1, and the detection value of each sensor. A control circuit and the like for stopping the operation of the pump hot water supply circuits 101a and b are housed.

The water refrigerant heat exchanger 103 is formed by winding the refrigerant side heat transfer tubes 103a and b and the water supply side heat transfer tubes 103c and d on the outer circumference of the water storage tank 130. For example, the coolant side heat transfer tubes 103a and b are alternately formed in a coil shape, and the water supply side heat transfer tubes 103c and d are wound around these overlapping portions to be thermally and firmly joined by soldering or the like. The upper ends of the refrigerant-side heat transfer tubes 103a and b are connected to the discharge sides of the compressors 102a and b via the pipes 107a and 108a, and the lower ends thereof are the pipes 107b and 108b and the expansion valves 104a, b) and one end of evaporator 105a, b via piping 107c, 108c. The other ends of the evaporators 105a and b are connected to the suction side of the compressors 102a and b via the pipes 107d and 108d. As shown in Fig. 4, the pipes 107d and 108d are formed by bending a portion to which the suction ports of the compressors 102a and b are connected. As a result, the vibrations of the compressors 102a and b are absorbed at the curved portions of the pipes 107d and 108d, and the vibrations of the compressors 102a and b are transmitted to the evaporators 105a and b to reduce the noise generated. Doing. In addition, a part including the curved portions of the pipes 107d and 108d is located in the projection surface below the evaporators 105a and b.

The joint attachment plate 12 is provided between the partition plate 3 and the side wall of the cabinet 2 on the front surface side of the lower part of the water storage tank 130. The joint plate 12 is provided with a water supply member 111, a hot water supply member 121, a pouring member 145, and a cold bath reheating pouring member 149 shown in FIG. We integrate in one place. The water supply member 111 is connected to the lower end portions of the water supply side heat transfer tubes 103c and d, and the hot water supply member 121 is connected to the upper end portions of the water supply side heat transfer tubes 103c and d. Thereby, the flow in the refrigerant | coolant side heat exchanger tube 103a, b and the water supply side heat exchanger tube 103c, d forms the counterflow.

In addition, as shown in FIG. 5, the support plate 13 of the defrost water is arranged over the entire length of the lower end portions of the evaporators 105a and b. The support plate 13 is formed of a material having thermal conductivity such as metal, and is provided to form a part of the partition wall of the storage chamber 10 in which the compressors 102a and b are accommodated. That is, the bottom surface of the base plate 13 is arrange | positioned at the level equivalent to the partition plate 8. As a result, the defrosting water in the support plate 13 can be prevented from freezing by the heat in the storage chamber 10.

In addition, in order to avoid trouble, the description of other components, such as pumps, piping, a valve, a sensor, etc. shown in FIG. 2 is abbreviate | omitted in FIG.

According to the heat pump hot water supply apparatus of this embodiment comprised in this way, the effect described next can be acquired.

First, the height dimension of the heat pump hot water supply device 1 is governed by the height of the evaporators 105a and b and the height of the water storage tank 130. In addition, the width or depth dimension is governed by the heat dissipation area of the evaporators 105a and b and the capacity of the water storage tank 130. In addition, since the compressors 102a and b are also relatively large component parts, they affect the height, width, and depth dimensions of the apparatus. In view of these considerations, in the present embodiment, the cylindrical water storage tank 130 is vertically disposed in the horizontal space of the evaporators 105a and b, and the compressors 102a and b formed in the cylindrical shape have the cylindrical axis in the transverse direction. It is arrange | positioned in the space below the evaporator 105a, b.

For example, in order to reduce the length (height) of the heat pump hot water supply apparatus 1, it is preferable to make the height dimension of the storage chamber 10 small. On the other hand, in this type of heat pump hot water supply apparatus 1, it is economical to mount one large-capacity compressor having the required capability (pressure amount). Moreover, it is common to use the cylindrical shaft of the compressor formed in the cylindrical shape from the relationship of lubricating oil. Therefore, when one compressor is used, the height occupied by the compressor becomes large and also becomes very large in the radial direction, thereby increasing the height dimension of the storage chamber 10. Therefore, the length of the apparatus itself must be increased.

Therefore, in this embodiment, the height dimensions occupied by the compressors 102a and b are greatly reduced by arranging the compressors 102a and b in the lateral direction. In particular, according to the present embodiment, since the heat pump cycle is divided into two systems and two compressors 102a and b are installed side by side, the height dimension of the storage chamber 10 can be made very low. As a result, even if the dimension of the height H of the heat pump hot water supply device 1 itself is the maximum, it can be set to 1600 mm.

Further, according to the present embodiment, the evaporators 105a and b can be secured by using the side walls and the rear walls of the cabinet 2, so that the lengths of the evaporators 105a and b can be suppressed to prevent the compressor ( Since 102a and b) are arrange | positioned under the evaporator 105a and b, the height dimension of the whole apparatus can be made small. As a result, since the height of the water storage tank 130 can be fully taken, even if the diameter is made small, the required capacity can be secured, so that the width and depth of the device can be easily suppressed with a desired value.

In addition, the heating capacity of the heat pump cycle can be improved by increasing the temperature of the compressors 102a and b itself in an acceptable range in consideration of reliability. In view of this, conventionally, no design has been made to increase the temperature of the compressor in the storage compartment. That is, according to this embodiment, two compressors 102a and b are installed in the storage chamber 10, and the volume occupancy ratio of the compressors 102a and b can be increased to about 30%, so that the temperature in the storage chamber 10 is increased. The heating ability can be improved by increasing the heat exchange in the water refrigerant heat exchanger (103). Moreover, the temperature of the hot water heated can be raised more than before. As a result, the capacity of the water storage tank 130 can be made small, which can contribute to the miniaturization of the apparatus.

In addition, according to the present embodiment, since the water refrigerant heat exchanger 103 is formed in a coil shape, and the water storage tank 130 is disposed in the space occupied by the coil, the space occupied by the entire apparatus can be made small, thereby miniaturizing the apparatus. .

Further, according to the present embodiment, as shown in Fig. 4, the pipes connecting the suction ports of the compressors 102a and b and the evaporators 105a and b are bent and formed, and the pipe including the bent portion is formed by the evaporator 105a, Since it arrange | positions and arrange | positions in the downward projection surface of b), the width of an apparatus can be made small as described below. That is, since the piping connected to the suction port and the discharge port of the compressors 102a and b, respectively, is drawn out from both ends of the compressors 102a and b arranged in the lateral direction in the present embodiment, the apparatus around the compressors 102a and b. The width is, for example, the length of the compressors 102a and b plus the length required for the piping on both sides. The piping on both sides requires 100 to 150 mm in consideration of the formability or high temperature solderability of the copper pipe. Therefore, if the width of the storage chamber 10 is 450 to 500 mm, the width of the heat pump hot water supply device 1 as a whole is 900 mm in consideration of the installability and the like. Securing 500 mm is quite difficult. In addition, it is difficult to accommodate two compressors 102a and b to construct a pipe or the like. In addition, overlapping the storage chamber 10 in the projection area of the heat dissipation surfaces of the evaporators 105a and b should be avoided because it hinders the flow of the heat radiation airflow and the heat exchange efficiency is lowered. This leads to narrowing the width of the yarn 10. Therefore, in the present embodiment, as shown in Fig. 4, a part including the curved portions of the pipes 107d and 108d is positioned in the projection surface below the evaporators 105a and b so as to sufficiently secure the width of the storage chamber 10. I'm doing it. This enables the storage of the compressors 102a and b without expanding the overall width of the heat pump hot water supply apparatus 1 having a width of 900 mm, and at the same time the defrost water disposed at the lower ends of the evaporators 105a and b. The support plate 13 is heated by heat dissipation of the pipes 107d and 108d and the compressors 102a and b.

In addition, according to this embodiment, since the storage chamber 10 of a compressor is arrange | positioned so that it may not overlap with the heat dissipation surface of evaporator 105a, b, uniform heat exchange was performed over the whole heat dissipation surface of evaporator 105a, b. All. Therefore, the problem that frost grows partially can be avoided because the air volume distribution is bad. In addition, since the base plate 13 of the defrosting water is heated by heat dissipation of the pipes 107d and 108d and the compressors 102a and b, the defrosting water in the base plate 13 can be prevented from freezing and the heat pump There is no fear that the function of the hot water supply device 1 will be lost.

From these things, according to this embodiment, the tank capacity of the water storage tank 130 can be restrained to 100 liters at the same time, and length can be made low. For example, when the tank capacity is 100 liters and the height is 1200 mm, the diameter can be integrated up to 300 mm for the inner dimension 450 mm of the heat pump hot water supply device 1.

In addition, in order to make the tank capacity 100 liters, it is necessary for the water refrigerant heat exchanger 103 to be able to quickly obtain the desired hot water temperature. In this regard, according to the present embodiment, two compressors 102a and b are disposed in the storage chamber 10 to increase the temperature in the storage chamber 10 to increase the discharge gas temperature of the compressor, and the water refrigerant heat exchanger 103 The hot water temperature that can be heated can be increased to, for example, 35 ° C. to 60 ° C., so that the user's request can be responded to. That is, the hot water in the storage tank 130 can be used to assist the start of the operation of the heat pump circuits 102a and b, etc., so that the height of the storage tank 130 can be reduced to a maximum of 1200 mm.

In addition, when this type of heat pump hot water supply device 1 is to be installed in a terrace of an urban mansion, a maximum depth dimension of 450 mm is required, but if the diameter of the water storage tank 130 is designed around 300 mm, this requirement will be met. Can be.

In view of the above, according to the present embodiment, by setting the capacity of the storage tank 130 to a maximum of 100 liters (1200 mm × 300 mm cylinder), a heat pump having a maximum height of 1600 mm even when the legs 7 are around 100 mm The hot water supply device 1 can be obtained. In addition, the product can be made in accordance with existing modules without extending the width dimension of the heat pump hot water supply device 1 to 900 mm or more. In addition, it is possible to carry a narrow staircase or the like, and also to install it in accordance with a building module.

In addition, according to the present embodiment, as shown in Fig. 1, the base 6 is lifted, for example, 100 mm from the mounting surface (bottom) by the leg 7, and is 150, for example, from the base 6. When the joint mounting plate 12 is provided at a distance of 200 mm, the pipes normally arranged from the mounting surface (bottom) side can be easily bent or connected using the height space (250 to 300 mm). have.

In addition, as shown in FIG. 4, this embodiment integrates and arranges the water storage tank 130, the compressors 102a and b, and the evaporators 105a and b to the back side of the cabinet 2, and the heat pump hot water supply apparatus ( It is characterized in that the center of gravity of 1) located behind the center line of the device. As a result, the device can be prevented from falling down to the passage side of the front face even by an earthquake or the like. That is, even if the height of the heat pump hot water supply apparatus 1 can be made low by this embodiment, it may have a maximum height of 1600 mm. In addition, since the heat pump hot water supply apparatus 1 has two sets of heat pump cycles and the water storage tank 130, an apparatus weight will be 150 kg-250 kg, for example. Thus, if an earthquake or the like occurs when a long and heavy heat pump hot water supply device 1 is installed in a veranda such as an urban mansion or the like, it becomes a problem that the heat pump hot water supply device 1 will not fall to the passage side of the front face. According to this embodiment, such a problem can be eliminated.

In addition, according to the present embodiment, since the heat pump hot water supply device 1 is housed and configured in one cabinet 2, it is possible to remove piping between devices at the time of installation and to reduce the size of the heat pump hot water supply device 1 from the downsizing. Simple.

In the present embodiment, the outer dimension of the heat pump hot water supply device 1 has a height H including the leg 7 at a maximum of 1600 mm, a width W at a maximum of 900 mm, and an inner length D. Dimensions can be realized up to 500 mm. In addition, the height H dimension of the leg 4 is about 100 mm. The compressors 102a and b have a diameter of about 150 mm and a length of about 350 mm.

According to the present invention, since the hot water supply device can be downsized, construction properties and the like can be improved, and hot water at an appropriate temperature can always be supplied to the user without having a large storage tank.

Claims (11)

A water refrigerant heat exchanger performing heat exchange between a compressor for compressing the refrigerant, a refrigerant flow path through which the refrigerant compressed by the compressor flows, and a water flow path through which water supplied from the water supply circuit flows; and a refrigerant whose temperature has been reduced by the water refrigerant heat exchanger. A depressurizing device for reducing pressure, an evaporator for evaporating the refrigerant depressurized by the depressurizing device and returning it to the compressor, and a hot water tank connected to a hot water supply pipe for supplying hot water heated by the water refrigerant heat exchanger. under, The water storage tank has a cylindrical outer shell and is disposed in the transverse space of the evaporator with the cylindrical axis of the outer shell vertically, The compressor has a cylindrical shell and a heat pump hot water supply device formed by arranging a cylindrical shaft of the shell in a transverse direction. The heat pump hot water supply apparatus according to claim 1, wherein the compressor is arranged in a compartment containing a compartment. The heat pump hot water supply apparatus according to claim 2, wherein the storage chamber of the compressor is formed in a space below the evaporator. The said water refrigerant heat exchanger is formed by joining and forming the heat exchanger tube which comprises the said coolant flow path, and the heat exchanger tube which comprises the said flow path in a coil shape, and it is inside of this coil. The said hot water tank is arrange | positioned at the heat pump hot water supply apparatus characterized by the above-mentioned. 5. The heat pump hot water supply apparatus according to claim 4, wherein the hot water supply pipe has a mixing valve for mixing hot water heated by the water refrigerant heat exchanger and hot water in the hot water tank and supplying the hot water to the hot water inlet. The heat pump hot water supply apparatus according to any one of claims 1 to 3, wherein the capacity of the water storage tank is at most 100 liters, and the height dimension of the heat pump hot water supply apparatus is at most 1600 mm. The heat pump hot water supply apparatus according to any one of claims 1 to 3, wherein the storage tank has a height of at most 1200 mm and a capacity of at most 100 liters. The hot water pipe of claim 5, wherein the temperature sensor detects the temperature of the hot water supplied from the water refrigerant heat exchanger, and the hot water stored in the water storage tank when the temperature of the hot water detected by the temperature sensor is lower than or equal to a set temperature. And a control unit for supplying and mixing the hot water supplied from the refrigerant heat exchanger. The hot water supply system according to claim 8, wherein a water temperature sensor detects a temperature of hot water supplied from the hot water supply port, and water from the water supply circuit is heated from the hot water supply port when the temperature of the hot water detected by the temperature sensor is equal to or higher than a set temperature. A heat pump hot water supply device, characterized by comprising a control unit for mixing with hot water. The heat pump cycle comprising the compressor, the water refrigerant heat exchanger, the decompression device, and the evaporator is provided, and a compressor of each set of heat pump cycles is provided in the storage chamber. A heat pump hot water supply device, characterized in that made. The heat pump hot water supply device according to any one of claims 1 to 3, wherein the compressor and the water storage tank are moved to and disposed on the rear side of the heat pump hot water supply device.

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