KR20110028638A - Heat pump hot-water supply device - Google Patents

Abstract

An object of the present invention is to provide a heat pump water heater that can effectively improve efficiency. The present invention is a heat pump hot water heater comprising a water refrigerant heat exchanger (2) for exchanging water with a refrigerant compressed by the compressor (1), the accommodating chamber (S) for accommodating the water refrigerant heat exchanger (2) ) Is installed, and a vacuum insulator 23 is provided at a portion of the wall portion forming the storage chamber S facing the water refrigerant heat exchanger 2.

Description

Heat Pump Water Heater {HEAT PUMP HOT-WATER SUPPLY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of efficiency of heat exchanger type hot water heaters using refrigerants, that is, hot water heaters using heat pump technology, and more particularly, to a heat pump water heater that can reduce heat loss (heat dissipation loss).

The water heater (water heater) includes an electric water heater, a gas water heater, and an oil water heater. The electric water heater includes an electric water heater using an electrothermal heater and a heat pump water heater using a refrigerant. In order to improve the efficiency of this heat pump water heater, various methods are conventionally proposed.

For example, in Patent Document 1, the amount of vacuum insulation is reduced by enclosing the storage tank with an exterior case, and disposing a vacuum insulator in an upper space between the storage tank and the exterior case, and arranging a sheet-shaped insulation in the lower space. And a heat pump hot water supply machine which aims at the improvement of the balance of a manufacturing cost and a performance effect is proposed.

In this heat pump water heater, since hot water accumulates in a storage tank for a long time, the heat dissipation loss discharged | emitted from the storage tank outer surface to air | atmosphere is suppressed, and it leads to the energy efficiency improvement of a heat pump water heater.

In Japan, a heat pump is operated using a nightly discount electric charge, and the water is heated to accumulate in hot water tanks as hot water, and during the day, water is stored in the hot water in the hot water tank according to use (opening the faucet). It is common to mix hot water to make hot water by mixing hot water, and such a heat pump water heater is suitable.

Moreover, in patent document 2, the heat pump water heater which thinned the heat insulating material by covering the compressor with the composite heat insulating material which consists of a vacuum heat insulating material, a sound absorption heat insulating material, and a dustproof heat insulating material is proposed.

Japanese Patent Application Publication No. 2007-155274 Japanese Patent Application Publication No. 2007-192440

The conventional heat pump water heater disclosed in the patent document 1 is effective as a heat insulation effect of a storage tank, but uses many parts such as an outer case, a vacuum heat insulator, and a sheet-shaped heat insulator, so that parts purchase cost and installation work are compared with conventional foam heat insulators. There was a problem that rain increased.

Moreover, in the said patent document 2, a discharge pipe, a suction pipe, electrical wiring, etc. are provided in the outer side of a compressor, and the shape of a composite heat insulating material becomes extremely complicated.

In addition, since the synchronous is hot water is used and the water is heated at a high temperature, the compressor is driven at a high speed, the winding temperature is increased, and there is a risk that the overload protection device operates when the compressor is wound with a high-performance insulating material such as a vacuum insulating material.

As mentioned above, in the conventional heat pump water heater, various problems have arisen with the improvement of efficiency.

Accordingly, an object of the present invention is to provide a heat pump water heater that can effectively improve efficiency without causing the above problems.

The present invention focuses on the water refrigerant heat exchanger, which is a large heat dissipation source among the elements constituting the heat pump water heater, as a means for solving the problems of the conventional heat pump water heater.

That is, the heat pump water heater according to the present invention is a heat pump water heater including a water refrigerant heat exchanger for exchanging water and refrigerant refrigerant compressed by a compressor, wherein a storage chamber for accommodating the water refrigerant heat exchanger is provided, A vacuum insulator is provided at a portion of the wall portion that is formed to face the water refrigerant heat exchanger.

The present invention can reduce the heat loss (heat loss due to heat dissipation) of the water refrigerant heat exchanger, which is a large heat dissipation source, and can effectively improve the efficiency.

Other objects, features and advantages of the present invention will become apparent from the following description of the embodiments of the present invention taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structure of the heat pump water heater which concerns on 1st Embodiment of this invention.
It is a flowchart which shows the hot water supply operation | operation at the time of using cold / hot water from a hot water operation, and the tank water heating operation after that in the heat pump water heater according to 1st Embodiment of this invention.
It is a top view which shows the state which removed the upper surface of the box of the heat pump unit in the heat pump water heater according to the first embodiment of the present invention.
It is a front view which shows the state which removed the front surface of the box of the heat pump unit in the heat pump water heater according to the first embodiment of the present invention.
5 is a front sectional view showing a schematic structure of a vacuum insulator used in the heat pump water heater according to the first embodiment of the present invention.
FIG. 6 is a plan sectional view showing a heat insulation structure of the water refrigerant heat exchanger in the heat pump water heater according to the second embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to FIGS.

<1st embodiment>

1 shows a heat pump water heater to which the present invention according to the first embodiment is applied. The heat pump water heater is provided with a heat pump unit 30 accommodating the components of the heat pump refrigerant circuit, a water storage unit 9 accommodating the water storage tank 9 and the water heater circuit components, and an operation control means 50. have.

The heat pump refrigerant circuit sequentially cools the refrigerant-side heat transfer tubes 2a and 2b disposed in the compressor 1, the water refrigerant heat exchanger 2, the pressure reducing device 3, and the air heat exchanger 4, respectively, through the refrigerant pipe. It is constituted by connecting, as a refrigerant is filled in the carbon dioxide (CO _2).

The compressor 1 is controlled from low speed (e.g., 700 revolutions per minute) to high speed (e.g., 7000 revolutions per minute) by PWM control, voltage control (e.g., PAM control), and combination control thereof. It is possible to control the rotation speed.

The water refrigerant heat exchanger (2) is provided with refrigerant side heat transfer tubes (2a, 2b) and water supply side heat transfer tubes (2c, 2d), and exchanges heat between the refrigerant side heat transfer tubes (2a, 2b) and the water supply side heat transfer tubes (2c, 2d). It is configured to perform.

As described later, the water refrigerant heat exchanger 2 includes a heat exchange member group 2e (see FIG. 3), a refrigerant side heat transfer tube 2b, and a refrigerant heat transfer tube 2a and a water supply side heat transfer tube 2c. It consists of two system paths of the heat exchange member group 2f (refer FIG. 3) which consists of a water supply side heat exchanger tube 2d.

As the decompression device 3, a motorized expansion valve is generally used, and the medium temperature high pressure refrigerant sent through the water refrigerant heat exchanger 2 is reduced in pressure and sent to the air heat exchanger 4 as a low pressure refrigerant that is easily evaporated. In addition, the pressure reduction apparatus 3 plays two roles. The first role is to adjust the circulating amount of refrigerant in the heat pump refrigerant circuit by changing the throttle amount of the refrigerant circuit, and the second role is when the frost is attached to the air heat exchanger 4 by operating the heat pump at synchronous low temperature. It is a role as a defrosting apparatus which melt | dissolves frost by sending a middle temperature refrigerant in a large quantity to the air heat exchanger 4 by making the said throttle amount fully open.

The air heat exchanger 4 introduces outside air by the rotation of the blower fan 5, performs heat exchange between the air and the refrigerant, and absorbs heat from the outside air.

The water storage unit 40 is equipped with the water circulation circuit for performing water storage (water storage to the water storage tank 9), and tank water supply (water supply from the water storage tank 9).

The water storage circuit is a water circuit for storing hot water in the water storage tank 9 by tank boiling operation, and is again stored in the water storage tank 9 through the tank circulation pump 14 and the water supply side heat transfer pipes 2c and 2d. It consists of the water piping to (9), the said water storage tank 9, the tank circulation pump 14, and the water supply side heat exchanger tubes 2c and 2d.

The tank hot water supply circuit includes a water supply metal member 6, a pressure reducing valve 7, a water supply water sensor 8, a water storage tank 9, a cold / hot water mixing valve 11, a tapping metal member 12, and these water supply metal members 6. ), The pressure reducing valve 7, the water supply water supply sensor 8, the water storage tank 9, the cold / hot water mixing valve 11, and the tapping metal member 1 are sequentially formed by a water pipe.

Moreover, the water supply metal member 6 is connected to water supply sources, such as water supply, and the tapping metal member 12 is connected to the kitchen faucet 13 etc.

In addition, the hot water supply metal member 12 can also be hot water to a washing face, a bath water supply circuit (not shown).

Next, the operation control means 50 performs the operation / stop of the heat pump refrigerant circuit and the rotation speed control of the compressor 1, and also controls the operation of the refrigeration cycle other than the refrigerant throttle amount adjustment of the pressure reduction device 3, and mixes hot and cold water. The hot water supply operation is performed by controlling the valve 11 or the like.

In addition, when the operation control means 50 is heated at a high temperature (for example, 90 ° C.) at the time of synchronous low temperature, since the temperature difference between the ambient temperature, the water supply temperature, and the boiling water is large, and the heating load is large, , 3000 to 4000 revolutions per minute, and on the contrary, the temperature difference between the ambient temperature, the water supply temperature and the boiling water, and thus the heating load can be reduced. For example, 1000 to 2000 revolutions per minute).

In addition, the heat pump water heater includes a tank thermistor for detecting the boiling water temperature and the amount of boiling water of the boiling water tank 9, each thermistor for detecting the refrigerant temperature and the water temperature of each part, a pressure sensor for detecting the discharge pressure of the compressor 1, and the like. (All not shown) are provided, and each detection signal is comprised so that it may be input to the operation control means 50. As shown in FIG. The driving control means 50 controls each device based on these signals.

Next, the operation of the heat pump water heater of the present embodiment will be described based on the embodiment of the flowchart of FIG. 2 with reference to the heat pump refrigerant circuit, the water heater circuit, and the water heater circuit of FIG. 1.

FIG. 2 is a flowchart showing an embodiment of a one-day driving operation from the night's hot water operation to the end of the next day's hot water supply use.

The operation control means 50 memorizes and learns the daily hot water consumption, estimates the hot water usage of the next day, determines the hot water temperature and the hot water amount at night, and the hot water amount is the night discount time of the electric charge (for example, 23 Learning control means for setting the boiling water operation start time so as to boil within the hour to 7 o'clock).

When the set time is reached, the driving control means 50 starts the boiling water operation. That is, the heat pump in FIG. 1 is operated and the tank circulation pump 14 is operated, and the water refrigerant heat exchanger 2 exchanges heat with the hot refrigerant and the tank cold water circulated from the boiling water tank 9 to store the water. The water in the tank 9 is boiled with hot water (step 61). That is, water storage operation is performed.

In the low water amount determination (step 62), the operation control means 50 determines whether the low water amount reaches the prescribed amount based on the detection signal from the tank thermistor, and performs the low water operation while not reaching the prescribed amount. Subsequently, when the prescribed amount is reached, the heat pump operation is stopped and the boiling water operation ends (step 63).

In the morning, for example, when the kitchen faucet 13 is opened and the use of cold / hot water is started (step 64), the operation control means 50 adjusts the amount of water supplied from the cold / hot water mixing valve 11 so that the hot water temperature is kept at a low temperature. , Tank water supply circuit of the water supply metal member 6, the pressure reducing valve 7, the water supply water sensor 8, the water storage tank 9, the cold and hot water mixing valve 11, the hot water metal member 12, and the kitchen faucet 13. Hot water is heated by the step (step 65). Then, the hot water supply is stopped when the faucet is closed and cold / hot water is finished (step 66).

In addition, the operation control means 50 detects the storage temperature of the storage tank 9 and the storage temperature of the storage tank 9 by the tank thermistor during the tank hot water supply operation (step 65) and the stop of the hot water supply operation. (Step 67), but normally, if the amount of residual water is more than the prescribed amount, reheating operation is not performed. If the amount of hot water supply is too large than the estimated amount of learning up to the previous day, and the tank residual quantity is less than the amount specified, the heat pump To perform a tank reheating operation (step 68), and in the low water amount determination (step 69), after the low temperature and the low water amount reach the prescribed amount, the heat pump operation is stopped to terminate the low temperature operation (step 70). .

When the use of the hot and cold water and the determination of the remaining amount of water in the tank by the operation control means 50 are repeated (step 71), the operation control means 50 functions the next learning control means. That is, the tank residual temperature, the amount of remaining water, the amount of hot water used, etc. are detected to calculate the amount of cold and hot water used on the day, and the estimation of the amount used for the next day is performed to set the night reheating conditions such as the night reheat temperature and amount, and the reheat operation start time. (Step 72).

When the operation start time is reached, the night water storage operation is performed again so as to become the prescribed tank reheating amount (step 61).

In the embodiment of the driving operation, the example in which the learning control means estimates the amount of cold / hot water usage for the next day has been described. However, more preferably (or generally), for example, the past 7 Based on the daily outside air temperature, water supply temperature, and cold / hot water usage, the cold / hot water usage of the next day is estimated to be sufficient for night reheating, or the amount of low hot water in which the efficiency is most improved is estimated.

Next, the heat insulation structure of the water refrigerant heat exchanger 2 in the heat pump water heater of the first embodiment will be described with reference to FIGS. 3 to 5.

FIG. 3 shows a plan view of a state in which the upper surface of the box 20 of the heat pump unit 30 is removed, and FIG. 4 shows a front view of a state in which the front face of the box 20 is removed. 4, the compressor 1 and the air heat exchanger 4 of the back side are abbreviate | omitted.

The box 20 of the heat pump unit 30 has a substantially rectangular shape, and an air heat exchanger 4 is provided on the rear and left sides thereof, and the fan 5 which rotates by the fan motor 21 is opposed to this. ) Is installed.

In addition, the fan 5 has a suction type and a blowout type, whereby the front and rear directions of the fan 5 are different, but in this embodiment, a blower type propeller fan is used, and the air heat exchanger 4 is provided from the back and the left side. Inhaling the outside air through, and is ejected to the front surface.

The box 20 is partitioned left and right by the partition plate 22. The space on the left and right sides (right side of the drawing) partitioned by the partition plate 22 is a storage chamber in which the compressor 1 or the water refrigerant heat exchanger 2 is accommodated. This storage chamber is generally called a machine chamber. That is, the storage space S in which the compressor 1 and the water refrigerant heat exchanger 2 are accommodated is separately installed in the inner space of the box 20. The compressor 1 and the water refrigerant heat exchanger 2 are arranged side by side in the horizontal direction in the storage chamber S. The water refrigerant heat exchanger 2 is provided at the front side of the storage chamber S, and the compressor 1 is provided at the rear side.

That is, the storage chamber (S) is formed of the side and front surfaces of the box body 20 of the heat pump unit 30 and the partition plate 22, and these side surfaces, the front surface and the partition plate 22 are It corresponds to the wall of the wall part mentioned later. The storage chamber S has a shape cut out at an angle with respect to the depth direction and the width direction of the box 20 so that it may not interfere with the said air heat exchanger 4. More specifically, the partition plate 22 is the depth direction part 22A which extends along the depth direction of the box 20 toward the back side from the front surface side of the box 20, and the depth direction. And an inclined portion 22B inclined with respect to the width direction, and a width direction portion 22C extending along the width direction. These depth direction parts 22A, the inclination part 22B, and the width direction part 22C have a flat shape, respectively. That is, the inclined portion 22B of the partition plate 22 is a relief portion corresponding to the air heat exchanger 4.

The water refrigerant heat exchanger 2 is configured to distribute the refrigerant from one end to the other end. As shown in FIG. 4, the water refrigerant heat exchanger 2 is disposed so that each end is positioned up and down. That is, the water refrigerant heat exchanger (2) is arranged in the storage chamber (S) in a state where the direction between both ends coincides with the vertical direction and stands up.

In addition, the water refrigerant heat exchanger 2 is composed of a plurality of heat exchange members 2e, 2f, 2g, 2h disposed adjacent to each other. Although four heat exchange members 2e to 2h are used in the water refrigerant heat exchanger 2 shown in FIGS. 3 and 4, the present invention is not limited thereto. Each of the heat exchanging members 2e to 2h is formed by overlapping the refrigerant-side heat transfer tube 2a and the water supply-side heat transfer tube 2c (FIG. 1) and winding in a coil shape, respectively, and have a substantially cylindrical shape. In addition, the plurality of heat exchange members 2e to 2h are arranged side by side in a row.

The heat pump water heater is provided with a vacuum insulator 23 so as to surround the water refrigerant heat exchanger 2. Specifically, the vacuum heat insulating material 23 is provided in the part of the wall part which forms the said accommodation chamber S facing the said water refrigerant heat exchanger 2. This configuration will be described in detail below.

First, the structure of the vacuum heat insulating material 23 is demonstrated. As the vacuum insulator 23, one having a substantially rectangular shape is used. In this way, the shape of the vacuum insulator 23 becomes a simple rectangular shape, such as an advantage that automatic production of the vacuum insulator 23 is possible, and the installation work is easy, and the cost of parts and processing can be reduced. There is an advantage.

In addition, the vacuum heat insulating material 23 is provided with the heat insulating material main body 27 and the protection members 28a and 28b which protect this heat insulating material main body 27, as shown in FIG. The protection members 28a and 28b are for preventing the heat insulating material main body 27 from being damaged and the vacuum state being destroyed to lose the heat insulating effect. Specifically, the protection members 28a and 28b are joined to both surfaces of the heat insulating material body 27. Therefore, the vacuum heat insulating material 23 is a triple structure comprised by the protection member 28a, the heat insulating material main body 27, and the protection member 28b.

However, it is not limited to this, The protection members 28a and 28b may be provided only in the part which should be especially protected among the heat insulating material main bodies 27, For example, what is joined to only one surface, or the heat insulating material main body 27 is It may be provided only in a part of surface which has. In addition, when there is no protrusion etc. around the vacuum heat insulating material 23, you may use only the heat insulating material main body 27 as the vacuum heat insulating material 23, without using the protection members 28a and 28b.

The heat insulating material main body 27 is provided with core materials 27c, such as glass wool (fiber material made of glass fiber), and metal members, such as aluminum and stainless steel, and vacuums the said core material 27c with this metallic member. It is formed by enclosing in a state. That is, in the heat insulating material main body 27, the core material 27c is enclosed in the metal member. Specifically, the heat insulating material main body 27 has the structure which pinched | interposed the core material 27c between metal thin plates (or metal film) 27a, 27b. More specifically, the heat insulating material body is arranged using metal thin plates 27a and 27b having a larger area than the core material 27c so that the metal thin plates 27a and 27b are pushed out of the core material 27c and pushed out. It is produced by closely contacting the peripheral edge portion. When installing the protruding peripheral edge part to the heat insulating material main body 27, it folds inward, for example.

In addition, although the cushioning materials, such as urethane, or a heat insulating material are used as protective members 28a and 28b, it is not limited to this, You may use films, such as vinyl.

In addition, when the metal thin plates 27a and 27b used for the heat insulating material main body 27 are aluminum, there exists a problem that it is easy to be damaged at the time of handling, and it protects according to the position of the core material 27c of the heat insulating material main body 27. It is preferable to join the members 28a and 28b from both surfaces.

By the way, since the metal thin plates 27a and 27b used for the heat insulating material main body 27 have good heat transfer property, when a dimension is small, the heat insulation effect is reduced by the heat transfer of the peripheral edge part of the metal thin plates 27a and 27b. Therefore, the vacuum insulator 23 preferably has a dimension at least equal to the heat transfer distance of the metallic thin plates 27a and 27b, and is preferably as large as possible. According to such a vacuum heat insulating material 23, the heat insulation effect can be made reliably compared with the method of using a plurality of small vacuum heat insulating materials arranged and used.

According to our experiment, when the thickness A of the core material 27c is about 5 mm, sufficient thermal insulation effect is achieved when the dimension (width or length) B of each side of the core material 27c is about 200 mm or more. When the thickness A of the core material 27c is about 10 mm, a sufficient thermal insulation effect can be exhibited if the dimension (width or length) B of each side of the core material 27c is about 100 mm or more. I could see.

Next, the arrangement form of the vacuum heat insulating material 23 is demonstrated using FIG. 3, FIG. In the heat pump water heater according to the present embodiment, the vacuum insulator 23 is provided in a portion surrounding the compressor 1 and the water refrigerant heat exchanger 2 among the wall portions forming the storage chamber S. Specifically, the vacuum insulator 23 is formed in at least a portion of the wall portion of the storage chamber S surrounding the compressor 1 and the water refrigerant heat exchanger 2 facing the water refrigerant heat exchanger 2. Is provided. More specifically, the vacuum insulators 23a to 23e are provided on the front face, the right face, the upper face, and the partition plate 22 of the box 20 facing the water refrigerant heat exchanger 2. That is, the vacuum insulator 23a is provided on the front face of the box 20, the vacuum insulator 23b is on the right side of the box 20, the vacuum insulator 23e is on the top surface of the box 20, and the partition plate 22 is provided. The vacuum heat insulating materials 23c and 23d are provided in this. In addition, below, when referring to the whole vacuum heat insulating material 23a-23e, it only shows "vacuum heat insulating material 23", and when referring to the individual vacuum heat insulating material 23a-23e, respectively, "vacuum heat insulating material 23a-23e is referred to. ) ".

The wall portion is composed of a wall and the vacuum insulator 23 provided on the wall. That is, the wall and the vacuum insulator 23 are provided as separate members. However, this invention is not limited to this, The wall and the vacuum heat insulating material 23 may be integrally provided, and the wall part may be comprised only by the vacuum heat insulating material 23, without using a wall.

The wall is provided with engaging portions (or mounting pieces) 20a, 20b, 22a for engaging the vacuum insulator 23 (i.e., hanging with each other). By such a structure, positioning of the vacuum heat insulating material 23, the lower heat insulating materials 24c and 25b mentioned later, etc. becomes easy, and the installation workability can be improved significantly. However, it is not limited to this, What adheres by an adhesive tape may be sufficient. In addition, when attaching the vacuum insulator 23 to the wall, since the wall to be attached is lower than the water refrigerant heat exchanger, it is not necessary to use an adhesive, a tape or the like which is particularly resistant to high temperatures, and to reduce the material cost. can do.

4, the vacuum insulator 23 is provided at a height position corresponding to at least an upper portion of the water refrigerant heat exchanger 2. That is, in the vacuum insulator 23, vacuum insulators 23a (not shown in Fig. 4), 23b, 23c are provided at least from 1/2 of the height of the water refrigerant heat exchanger 2, and the vacuum insulator ( The lower part of the heat insulating material 24c, 25b comprised by general heat insulating materials, such as urethane foam, is provided in the part below 23). In general, a pipe or the like is provided on the lower side, and it is sometimes difficult to manufacture a vacuum insulator having a shape that does not interfere with the arrangement of the pipe. However, a general insulator other than the vacuum insulator is used as the lower insulators 24c and 25b. By doing so, it becomes easy to ensure heat insulation without disturbing the arrangement of the pipe.

In the compressor 1, the water refrigerant heat exchanger 2, and the air heat exchanger 4, refrigerant pipes or water pipes are arranged, and these apparatuses and pipes are connected to each other so that the heat pump refrigerant circuit shown in FIG. Although a part of the tank storage circuit is formed, it abbreviate | omits in FIG. 3, FIG.

3 and 4, a plurality of vacuum insulators are used, and a vacuum insulator is formed on each of the front face, the right face, the upper face, and the partition plate 22 of the box 20 to face the water refrigerant heat exchanger 2. By setting it as the structure which provides 23a-23e, the simple rectangular vacuum heat insulating materials 23a-23e can be used. In addition, these vacuum heat insulating materials 23a-23e are fixed by the locking parts 20a, 20b, 22a, etc. Therefore, both the parts cost and the work cost can be reduced. In this way, the vacuum insulators 23a to 23e and the wall to be installed are each flat, so the installation work is very easy.

In addition, the water refrigerant heat exchanger (2) is surrounded by the vacuum insulators (23a to 23c) from at least three directions on the front side and the two side side, and the compressor (1) that becomes hot at the time of operation is disposed on the other back side. do. As a result, the compressor 1 and the water refrigerant heat exchanger 2 are kept warm to each other, and as a result, leakage of heat from four directions is prevented. Therefore, the effect of reducing the heat radiation loss can be obtained very well.

In addition, the place where the vacuum heat insulating materials 23a-23e are installed, and the magnitude | size can be changed suitably with respect to manufacture cost, and the front surface side of the box body with the largest area which opposes the water refrigerant heat exchanger 2 is provided. The vacuum heat insulating material 23a of considerable magnitude may be provided in the water refrigerant heat exchanger 2 only. Even in this case, a good heat radiation loss reduction effect can be obtained in comparison with the compressor 1 and the partition plate 22 compared with the case where no heat insulation is performed.

<2nd embodiment>

Next, 2nd Embodiment is described using FIG. About a common structure, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As shown in FIG. 6, the heat pump water heater according to the second embodiment is such that the vacuum insulator 26 is disposed so as to substantially surround the water refrigerant heat exchanger 2, but open the part facing the compressor 1. In this embodiment, since the arrangement | positioning structure in which the vacuum heat insulating material 26 is not provided in the part between the compressor 1 and the water refrigerant heat exchanger 2 is carried out, heat radiation from the water refrigerant heat exchanger 2 to the circumference | surroundings is prevented. While preventing, the water refrigerant heat exchanger 2 is capable of receiving heat radiation from the compressor 1.

In addition, this vacuum heat insulating material 26 is what integrated the vacuum heat insulating materials 23a, 23b, 23c in 1st Embodiment. That is, the vacuum insulator 26 has a substantially C-shape and is provided on the front face, the right face, and the partition plate 22 of the box 20, and the both ends 26a and 26b face the water refrigerant heat exchanger 2 side. It is inclined. As a result, the water refrigerant heat exchanger 2 can be surrounded by a single vacuum insulator 26 without substantially a gap, so that the heat insulating property can be improved, and the parts cost and installation work cost can be reduced by integrating the vacuum insulator. can do.

As described above, the heat pump water heater according to the first and second embodiments of the present invention has a structure capable of minimizing the material cost and the work cost and improving the heat insulating property of the water refrigerant heat exchanger 2, so that the heat dissipation loss is completely new. The reduction measures can improve energy savings.

In particular, when the capacity of the storage tank is small, or when the water is frequently used for commercial use, the storage of water is not enough by using only the night storage, and the present invention is applied to a heat pump water heater that performs reheating even during the day. A large effect, such as an energy saving effect by the heat retention improvement of the refrigerant | coolant heat exchanger 2, and a shortening of a heating operation rise time, can be acquired.

In addition, since the vacuum insulators 23 and 26 do not directly contact the water refrigerant heat exchanger 2, the risk of damaging the vacuum insulators 23 and 26 can be reduced.

In addition, the heat pump hot water supply machine which concerns on this invention is not limited to the structure of each said embodiment, A various change is possible within the range which does not deviate from the meaning of invention.

For example, the vacuum insulator may be provided over the entire circumferential direction of the wall portion forming the storage chamber.

In addition, the partition plate 22 which partitions the box body 20 is not essential, and the storage chamber may be formed in the side surface, front surface, back surface, etc. of the box body 20 of the heat pump unit 30. As shown in FIG. .

Although the foregoing description has been made with respect to the examples, it is apparent to those skilled in the art that various changes and modifications can be made within the spirit of the invention and the scope of the appended claims.

1: compressor
2: water refrigerant heat exchanger
4: air heat exchanger
9: water storage tank
11: hot and cold water mixing valve
13: kitchen faucet
14: tank circulation pump
20: box
22: partition plate
23a to 23e, 26: vacuum insulation
24c, 25b: lower insulation
30: heat pump unit
40: water storage unit
50: driving control means

Claims (8)

With compressor,
A water refrigerant heat exchanger configured to exchange heat with the refrigerant compressed by the compressor;
An accommodation chamber formed by a wall part to accommodate the water refrigerant heat exchanger;
And a vacuum insulator provided at a portion of the wall portion facing the water refrigerant heat exchanger. The method of claim 1, wherein the compressor is further accommodated in the compressor,
The vacuum insulator is provided in a portion of the wall surrounding the compressor and the water refrigerant heat exchanger, heat pump water heater. The heat pump hot water heater according to claim 1, wherein the vacuum insulator is provided at a height position corresponding to at least an upper portion of the water refrigerant heat exchanger. The method of claim 2, wherein the compressor and the water refrigerant heat exchanger are arranged side by side in the horizontal direction,
The said heat insulating water heater is provided in the wall part of the said accommodating chamber which surrounds the said compressor and a water refrigerant heat exchanger at least in the part which opposes the said water refrigerant heat exchanger. According to claim 1, The wall portion is composed of a wall and the vacuum insulator installed on the wall,
The wall is provided with a locking portion for locking the vacuum insulator, heat pump water heater. With compressor,
A water refrigerant heat exchanger configured to exchange heat with the refrigerant compressed by the compressor;
An accommodation chamber formed by a wall to accommodate the compressor and the water refrigerant heat exchanger;
The water refrigerant heat exchanger and the compressor are arranged side by side in the horizontal direction,
A heat pump hot water heater, characterized in that a vacuum insulation is arranged to surround the water refrigerant heat exchanger and extend towards the compressor. The said vacuum heat insulating material is a heat insulating material main body of Claim 1 or 6 provided by surrounding a core material in a vacuum state by the metal member,
The heat pump hot water heater, characterized in that the core material has a substantially rectangular shape in a flat state, the thickness is about 5 mm, and the dimension of each side is set to at least about 200 mm or more. The said vacuum heat insulating material is a heat insulating material main body of Claim 1 or 6 provided by surrounding a core material in a vacuum state by the metal member,
The core material has a substantially rectangular shape in a flat state, and has a thickness of about 10 mm and a dimension of each side is set to at least about 100 mm or more, the heat pump hot water heater.

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