JP5952579B2 - Hot water storage tank installation structure and heat pump hot water supply device - Google Patents

Description

  The present invention relates to a hot water storage tank installation structure in a heat pump hot water supply apparatus, and a heat pump hot water supply apparatus including the hot water storage tank installation structure.

  A heat pump type hot water supply device that stores hot water heated by a heat pump unit in a hot water storage tank, and takes out the hot water from the hot water storage tank as necessary. A large amount of water (usually tap water) is heated, hot water having a predetermined temperature of about 60 to 95 degrees is stored in the hot water storage tank, and the stored hot water is taken in as necessary. From the viewpoint of reduction, it is spreading as a hot water supply system in general households and a commercial hot water supply system in factories and hotels.

  The hot water stored in the hot water storage tank has a high temperature in the upper part of the hot water storage tank and a low temperature in the lower part due to the specific gravity difference caused by the difference in temperature. Therefore, in this type of heat pump type hot water supply apparatus, in order to actively take in hot water having a high temperature existing on the upper side of the hot water storage tank, a hot water discharge port is arranged at the upper part of the hot water storage tank, and the hot water storage tank A water introduction port is arranged at the bottom of the hot water, and hot water existing on the upper side of the hot water storage tank is taken in through the hot water discharge port, while the volume of the taken hot water is introduced and water is introduced from the water introduction port. Yes.

  In a heat pump hot water supply apparatus currently on the market, the hot water storage tank generally has a vertically long cylindrical shape (hereinafter, referred to as a vertical installation type) that is installed with its axial direction along the vertical direction. (For example, see Patent Documents 1 and 2 below.)

JP 2011-52854 A JP 2010-223582 A

  However, the vertical hot water storage tank that is bulky in the height direction may be restricted in places where there are obstacles in the height direction, such as a ceiling or an eaves.

  Here, if a horizontally long cylindrical shape (hereinafter referred to as a horizontal type) is used as the hot water storage tank, installation is restricted even in places where there are obstacles in the height direction such as the ceiling or eaves. Disappears. Moreover, the horizontal storage type hot water storage tank has an advantage that the installation state is stabilized as compared with the vertical storage type.

  However, since the ratio of the horizontal cross-sectional area to the depth of the horizontal hot water storage tank is large, a slight inclination existing on the installation surface greatly affects the distribution of hot water in the hot water storage tank. That is, a phenomenon occurs in which hot water having a high temperature gathers in a portion of the hot water storage tank that becomes the top side of the slope of the installation surface, and hot water having a low temperature gathers in a portion that becomes the slope side of the slope.

  Therefore, when the hot water discharge port provided in the upper part of the hot water storage tank is on the inclined valley side, hot water with the highest amount of heat cannot be taken.

  On the other hand, when the water inlet provided at the bottom of the hot water storage tank is on the top side of the slope, water will be introduced toward the layer of high heat in the hot water existing in the hot water storage tank. The hot water in the hot water storage tank cannot be used efficiently.

  The present invention has been developed to solve the technical problem, and includes a novel hot water storage tank installation structure capable of efficiently using hot water in the hot water storage tank, and the hot water storage tank installation structure. It aims at providing the heat pump type hot-water supply apparatus which becomes.

The hot water storage tank installation structure of the present invention stores the hot water heated by the heat pump unit in the hot water storage tank, and takes out the hot water from the hot water storage tank through the hot water discharge port arranged at the upper part of the hot water storage tank, if necessary. A hot water storage tank installation structure in a heat pump type hot water supply apparatus that sequentially introduces water into the hot water storage tank through the water introduction port arranged at the bottom of the hot water storage tank, and the hot water storage tank is a hollow cylindrical tank A main body portion and a pair of side wall portions that close both ends of the tank main body portion, and the axial direction of the tank main body portion with respect to a base frame is supported by a support that supports the hot water storage tank. It is installed in a state inclined with respect to a horizontal plane, and the hot water discharge port is on the upper side of the tank main body with respect to the hot water storage tank and the The water inlet is disposed at the bottom side of the tank main body and at the inclined valley side with respect to the hot water storage tank, and is lateral to the base frame. Along with the hot water storage tank installed in a standing manner, a circulation tank is installed in a vertical manner, and the upper part of the circulation tank is substantially the same as the top of the hot water storage tank and the top side of the slope. The hot water heated by the heat pump unit is stored, and the hot water stored in the hot water storage tank is supplied from the hot water discharge port to the secondary header through the heated water outlet. hot water stored in the circulation tank, from the circulation tank, heating water outlet pipe from the heating water outlet to the secondary side header by circulating in the order of the secondary side header, the circulating pump, circulating water Modokuchi, circulation tank Characterized in that it is adapted to prevent the cool (hereinafter, referred to as the present invention structure.).

  In the structure of the present invention, it is preferable that the inclination is 2 to 30 degrees with respect to the horizontal plane.

  The heat pump type hot water supply apparatus of the present invention is characterized by comprising the structure of the present invention (hereinafter referred to as the present invention apparatus).

  According to the present invention, the hot water in the hot water storage tank can be used efficiently.

FIG. 1 is a schematic view showing the apparatus of the present invention. FIG. 2 is a front view showing the structure of the present invention.

  Hereinafter, although an embodiment of the present invention is described based on a drawing, the present invention is not limited to this embodiment.

  FIG. 1 shows a schematic view of the device 1 of the present invention. The device 1 of the present invention includes a hot water storage tank 2 and a heat pump unit 3.

  The hot water storage tank 2 includes a hollow cylindrical tank main body portion 21 and a pair of side wall portions (a first side wall portion 22 and a second side wall portion 23) that close both ends of the tank main body portion 21. It is a high-pressure tank (capacity 8000 liters). Further, a hot water discharge port 24 is provided at a position near the first side wall portion 22 on the upper side (pipe top portion side) of the tank main body portion 21 in the hot water storage tank 2, and the tank main body portion 21. A water inlet 25 is provided at the bottom side (tube bottom side) and at a position near the second side wall 23.

  The hot water storage tank 2 is installed so as to construct the structure of the present invention. As shown in FIG. 2, the hot water storage tank 2 is configured such that the axial direction of the tank main body 21 is set with respect to a horizontal plane by a plurality of supports 5 arranged in parallel along the width direction of the rectangular base frame 4. And tilted at an inclination angle of 3 degrees (the first side wall portion 22 side is the top side of the tilt and the second side wall portion 23 side is the tilted valley side). . Therefore, the hot water discharge port 24 is arranged at a position on the upper side of the tank main body 21 and the top side of the inclination with respect to the hot water storage tank 2, and the water inlet 25 is With respect to the hot water storage tank 2, the hot water storage tank 2 is disposed at a position on the bottom side of the tank main body portion 21 and on the inclined valley side.

  The heat pump unit 3 is a device that heats water by a cycle of refrigerant compression and expansion to produce hot water. More specifically, the heat pump unit 3 includes an air heat exchanger (not shown), a compressor, a water heat exchanger, and an expansion valve, and heat in the atmosphere is converted into a refrigerant through the air heat exchanger. After taking in and compressing the refrigerant with the compressor to a high temperature and high pressure state, the heat of the refrigerant is transferred to water by a hydrothermal exchanger to form hot water, and the refrigerant that has lost heat is transferred to the expansion valve. It is a heat source machine (rated 65 kW) that is expanded and brought into a low-temperature and low-pressure state that easily takes in heat from the atmosphere.

  In storing hot water in the hot water storage tank 2, first, water (usually tap water (about 5 to 29 ° C.)) is introduced into the hot water storage tank 2 from the water supply port A through the water introduction port 25. The introduction of water into the hot water storage tank 2 is performed until the hot water storage tank 2 is full. At this time, the air existing in the hot water storage tank 2 is released into the atmosphere through the first air vent valve AV1. When water leaks from the first air vent valve AV1, the leaked water is discharged from the discharge port I through the drain path W indicated by a two-dot chain line.

  After the hot water storage tank 2 is filled with water, by switching the first three-way valve TV1 incorporated between the water inlet 25 and the water supply outlet B, the water inlet 25 and the water supply outlet B And the second three-way valve TV2 incorporated between the hot water inlet C and the hot water discharge port 24 is switched to make the hot water inlet C and the hot water discharge port 24 communicate with each other. Accordingly, the water in the hot water storage tank 2 is taken out from the lower side of the hot water storage tank 2 through the water supply outlet B, and is transported into the heat pump unit 3. The water transported into the heat pump unit 3 is heated by a refrigerant compression and expansion cycle to become hot water of about 60 to 90 degrees, and enters the hot water storage tank 2 from the hot water inlet C through the hot water discharge port 24. Are introduced from above. Water and warm water in this process are transported by driving a pump (not shown) disposed in the heat pump unit 3.

  In the present embodiment, after the hot water is stored in the hot water storage tank 2, the hot water is introduced into the circulation tank 6 by switching the second three-way valve TV2. The air existing in the circulation tank 6 is discharged into the atmosphere through the second air vent valve AV2. When water leaks from the second air vent valve AV2, the leaked water is discharged from the discharge port I through the drain path W indicated by a two-dot chain line.

  Hot water stored in the hot water storage tank 2 is taken out from the hot water storage tank 2 through the hot water discharge port 24 and reaches the secondary header F through the hot water supply port D and the heated water outlet E, and the secondary side. Utilized (taken in water) through a plurality of water taps G branched by the header F. The warm water in this step is transported by driving the circulation pump P.

  On the other hand, the hot water storage tank 2 from which hot water has been taken out and the internal pressure has decreased draws hot water into the hot water storage tank 2 from the hot water supply port A through the water inlet 25. The hot water existing in the upper part of the hot water storage tank 2 and the water introduced from the lower part of the hot water storage tank 2 form a layer almost without mixing because of the specific gravity difference caused by the temperature difference.

  When the hot water layer existing in the upper part of the hot water storage tank 2 is used up or when the hot water in the hot water storage tank 2 is cooled, the water existing in the hot water storage tank 2 is transported into the heat pump unit 3 again. The hot water is heated to be introduced into the hot water storage tank 2.

  The heating of the water by the heat pump unit 3 is usually performed at night when the electricity rate is low, and the hot water stored in the hot water storage tank 2 is taken as needed.

  By the way, when water is heated by the heat pump unit 3 at night, the hot water existing in the pipe from the heated water outlet E to the secondary header F is cooled, so that the next morning hot water can be used quickly. In some cases, hot water cannot be taken.

  In this embodiment, in this embodiment, in addition to the hot water storage tank 2, the circulation tank (capacity 800 liters) 6 is provided and stored in the circulation tank 6 at night when water is heated by the heat pump unit 3. In the piping from the heated water outlet E to the secondary header F by circulating the heated water in the order of the heated water outlet E, the secondary header F, the circulation pump P, and the circulating water return port H. The hot water in the water is prevented from cooling, so that the hot water can be quickly taken in when the hot water is used the next morning.

  As shown in FIG. 2, in the present embodiment, the circulation tank 6 is installed on the base frame 4 in a vertical manner together with the hot water storage tank 2 installed in a horizontal manner. That is, the hot water storage tank 2 and the circulation tank 6 are installed on the base frame 4 in a factory and are in a state where main pipes are attached, and then are transported to the installation site by land. Is to be installed. Thus, if the hot water storage tank 2 and the circulation tank 6 are installed on the base frame 4, there is an advantage that assembly work, transportation work and installation work are facilitated.

  In the present embodiment, in a limited installation space, in order to install the hot water storage tank 2 and the circulation tank 6 having as high a capacity as possible, an upper part of the circulation tank 6 installed in a vertical manner, The upper part of the hot water storage tank 2 installed in a standing manner and the position on the top side of the slope are set to have substantially the same height.

  Since the hot water storage tank 2 is installed horizontally in the apparatus 1 of the present invention having the above-described configuration, installation may be restricted even in places where there are obstacles in the height direction such as a ceiling or an eaves. Disappear. In addition, the hot water storage tank 2 installed in the horizontal position is more stable in installation than the vertical type.

  In particular, in the apparatus 1 of the present invention, the axial center direction of the tank body 21 in the hot water storage tank 2 is inclined with respect to a horizontal plane, and the hot water discharge port 24 is connected to the hot water storage tank 2. The hot water having the highest temperature existing in the uppermost layer in the hot water storage tank 2 installed in a horizontal orientation is disposed at the upper side of the tank body 21 and at the top of the slope. Water can be taken efficiently.

  That is, in the apparatus 1 of the present invention, when the hot water storage tank 2 is installed, the axial center direction of the tank main body 21 is positively inclined with respect to the horizontal plane, so that the hot water storage tank 2 becomes the uppermost part. The position is always the position on the upper side of the tank body 21 and on the top side of the slope.

  Thus, if the hot water discharge port 24 is disposed at the upper side of the tank main body 21 and at the top of the slope, the highest temperature inevitably present in the uppermost layer in the hot water storage tank 2 is obtained. High temperature water can be taken efficiently. Thus, the amount of heat held by the hot water can be used effectively.

  Further, in the present invention, the water introduction port 25 is further arranged at the bottom side of the tank body 21 and the inclined valley side with respect to the hot water storage tank 2. Water can be introduced toward the lowest layer having the lowest temperature in the tank 2.

  That is, in the apparatus 1 of the present invention, when the hot water storage tank 2 is installed, the axial center direction of the tank main body 21 is positively inclined with respect to the horizontal plane, so that it becomes the lowermost part of the hot water storage tank 2. The position is always the position on the lower side of the tank body 21 and on the valley side of the slope.

  Accordingly, if the water inlet 25 is arranged at the lower side of the tank main body 21 and the inclined valley side, the lowest temperature in the hot water storage tank 2 is inevitably provided. Water can be introduced. Accordingly, it is possible to suppress the temperature drop in the hot water storage tank 2 due to the introduction of water as much as possible, and thus the hot water in the hot water storage tank 2 can be effectively utilized.

  In the present invention, the inclination applied to the hot water storage tank 2 is preferably in the range of 2 to 30 degrees, more preferably in the range of 2 to 10 degrees, and in the range of 3 to 5 degrees. It is more preferable.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used in a heat pump type hot water supply apparatus in which a hot water storage tank is a horizontal type.

DESCRIPTION OF SYMBOLS 1 Invention apparatus 2 Hot water storage tank 21 Tank main body part 22 First side wall part 23 Second side wall part 24 Hot water discharge port 25 Water introduction port 3 Heat pump unit 4 Base frame 5 Support tool 6 Circulation tank A Water supply port B Water supply port C Hot water Inlet D Hot water outlet E Heating water outlet F Secondary header G Water tap H Circulating water return port P Circulating pump AV1 First air vent valve AV2 Second air vent valve TV1 First three-way valve TV2 Second three-way valve

Claims (3)

The hot water heated by the heat pump unit is stored in the hot water storage tank, and the hot water is taken out from the hot water storage tank through the hot water discharge port arranged in the upper part of the hot water storage tank as needed. A hot water storage tank installation structure in a heat pump type hot water supply apparatus that sequentially introduces water into the hot water storage tank through a water introduction port arranged at the bottom,
The hot water storage tank includes a hollow cylindrical tank main body portion and a pair of side wall portions that close both ends of the tank main body portion, and is supported with respect to a base frame by a support that supports the hot water storage tank. Installed in a state in which the axial direction of the tank body is inclined with respect to the horizontal plane,
The hot water discharge port is disposed on the upper side of the tank body and the top of the slope with respect to the hot water storage tank,
The water inlet is disposed at a position on the bottom side of the tank main body and the inclined valley side with respect to the hot water storage tank,
Along with the hot water storage tank installed horizontally with respect to the base frame, a circulation tank is installed vertically,
The circulation tank has an upper part thereof, an upper part of the hot water storage tank, and a position on the top side of the slope having substantially the same height, and is adapted to store hot water heated by a heat pump unit,
The hot water stored in the hot water storage tank is supplied from the hot water discharge port to the secondary header through the heating water outlet,
The hot water stored in the circulation tank is circulated in this order from the circulation tank to the heating water outlet, the secondary header, the circulation pump, the circulation water return port , and the circulation tank . A hot water storage tank installation structure characterized by preventing the piping from cooling. In the hot water storage tank installation structure according to claim 1,
A hot water storage tank installation structure in which the inclination is 2 to 30 degrees with respect to a horizontal plane.   A heat pump type hot water supply apparatus comprising the hot water storage tank installation structure according to claim 1.

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