JPS59210260A - Heat pump type hot-water reserving device - Google Patents

Abstract

PURPOSE:To make the whole of the device compact by accommodating other constituting equipments in an inside space enclosed by board wall like outdoor air heat exchanger. CONSTITUTION:The outdoor heat exchanger 11 is arranged with a radiator 12 thereabove and is constituted so as to have a board wall like configuration enclosing the outer periphery of the upper part of a hot-water reserving tank 1 while the shape thereof shows a ?-shaped configuration in the plan view thereof. The inside space, enclosed by the board wall like outdoor air heat exchanger 11 and the radiator 12, accommodates various equipments constituting a heat pump type cooling and heating device while a fan 13 for ventilation is provided at the center of the inside space. The outdoor air heat exchanger 11 does not occupy a large space, therefore, a comparatively large space for accommodating other constituting equipments therein may be formed. Accordingly, respective constituting equipments will never occupy useless spaces and the whole of the device may be made compact.

Description

[Detailed description of the invention] The present invention relates to a heat pump type hot water storage device.

For example, when installing a heat pump-type hot water storage device indoors that circulates refrigerant with a compressor and uses the heat of condensation of the refrigerant, the installation space becomes as small as possible, and there is no need to worry about large spaces in buildings (1). It is desirable to avoid occupying too much space. In particular, in the case of a hot water storage device for home installation, space saving is even more required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat pump type hot water storage device in which the entire device can be made compact in order to meet the above-mentioned technical problems.

To achieve the above object, the present invention provides a heat pump type hot water storage device in which a refrigerant circuit for compressing and circulating refrigerant by a compressor is provided with a hot water storage heat exchanger for exchanging heat with hot water in a hot water storage tank. An outdoor air heat exchanger is formed in the shape of a plate wall along the outer periphery of the upper part of the hot water storage tank, and other devices other than the outdoor air heat exchanger are placed in an inner space surrounded by the outdoor air heat exchanger in the form of a plate wall. It is characterized by housing component equipment.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

FIGS. 1 and 2 show an embodiment (2) in which the hot water storage device of the present invention is attached to a heat pump air-conditioning device.

In FIG. 1.2, a heating and cooling system equipped with a hot water storage tank 1 is housed inside an outer shell frame 51. As shown in FIG. Hot water tank 1
An engine 2 is installed at the top of the engine 2, and a compressor 3 that compresses and circulates a refrigerant such as Freon is connected to the engine 2. The outside of the hot water tank 1 is integrally covered with a heat insulating material 40 such as glass wool, and the engine 2 is similarly covered with a heat insulating material 40.
1. In addition, inside the hot water storage tank 1, a heat exchanger 14 for hot water storage of the refrigerant circuit (2) to be described later is inserted in the lower part, and an exhaust heat recovery heat exchanger 15 for recovering engine exhaust heat is inserted in the upper part. has been done.

The engine 2 is driven using, for example, kerosene as fuel,
It has a horizontal configuration in which the cylinder 2a extends laterally. The orientation of this cylinder may be oblique as shown by the chain line 2 al . An air cleaner 4 and a carburetor 5 are connected to the intake side of the engine 2, and a muffler 7 is provided to an exhaust pipe 6 on the exhaust side. Furthermore, this muff (3
) In the rough part, there is an exhaust gas heat exchanger 2 to absorb the heat of exhaust gas.
9 is provided. In the space below the stay 42 supporting the engine 2, an electronic control box 39 for controlling heating and cooling operation is provided, and above the engine 2, a water heat exchanger 9 of the refrigerant circuit (2) to be described later is provided. and a heating auxiliary heat exchanger 10 are provided.

11 is an outdoor air heat exchanger of the refrigerant circuit (■), which will be described later;
12 is a radiator for cooling water of the engine 2. The former outdoor heat exchanger 11 has the latter radiator 12 disposed at the top, is formed into a plate wall shape so as to surround the outer periphery of the upper part of the hot water storage tank 1, and is U-shaped in plan view. ing. Such a plate-walled outdoor air heat exchanger 1
In the inner space surrounded by the radiator 1 and the radiator 12, various devices constituting the above-mentioned heat pump air-conditioning system with a hot water storage device are housed, and a fan 13 for blowing air is provided at the center of the inner space.

The compressor 3 driven by the engine 2 forms (4) a refrigerant circuit (2) that compresses and circulates a refrigerant such as Freon, as shown in FIGS. 11-14. This refrigerant circuit (2) includes the above-mentioned outdoor air heat exchanger 11, water heat exchanger 9, throttles 17, 18 and check valves 19, 20 provided adjacent to these heat exchangers, and furthermore, A heat exchanger 14 for storing hot water is provided. By switching the three-way switching valves 21, 23 and the four-way switching valve 22, the circulation path for sending refrigerant to these devices can be configured as a heating circuit, as described later.
It can be switched to the cooling circuit, hot water storage circuit, etc. In addition, an unload valve 33 is provided to bypass the discharge side and suction side of the compression TA3, and when the engine 2 is overloaded, a part of the high pressure gas on the discharge side is released to the suction side, causing the overload. This is so that it can be prevented.

A circulating water circuit (■) passes through the water heat exchanger 9, and the circulating water that has been heat-exchanged in the water heat exchanger 9 is forcedly circulated through this circulating water circuit (2) by a pump 24, thereby heating and cooling the room 25. There is. On the downstream side of the water heat exchanger 9 in the circulating water circuit (5) (5), a bypass circuit (2) is provided via valves 26 and 27, so that the flow path can be switched. An auxiliary heat exchanger 10 for heating is provided in the bypass circuit (1).

Cooling water for the engine 2 is supplied to the pump 2 via the cooling water circuit ■.
8 for forced circulation. The cooling water in the cooling water circuit ■ cools the cylinder 2a of the engine 2 and removes heat.
Furthermore, heat is taken away through the exhaust gas heat exchanger 29 in the muffler 7, and this taken engine exhaust heat is used in the exhaust heat recovery heat exchanger 15 provided in the hot water storage tank 1 and the above-mentioned auxiliary heat exchanger 1 for heating.
Release to 0.

The cooling water circuit ■ is provided with three valves 30, 31, and 32, and by selectively switching these, the cooling water is transferred to the exhaust heat recovery heat exchanger 15 and the heating auxiliary heat exchanger as shown by the solid arrows. 10, bypass the exhaust heat recovery heat exchanger 15 and pass directly only to the heating auxiliary heat exchanger 1O as shown by the chain arrow, or route the heat to the radiators 1 (6) and 2 in a tube layer. be able to.

In the above-mentioned device, the three-way valve 21 in the refrigerant circuit I
．． 23 and the four-way valve 22, the following operations such as heating, cooling, hot water storage, etc. can be performed.

(Heating Operation) As shown in FIG. 11, the three-way valves 21 and 23 and the four-way valve 22 are set so that the refrigerant compressed by the compressor 3 flows in the flow path shown by the arrow.

With this setting, the water heat exchanger 9 acts as a refrigerant condenser, and the outdoor air heat exchanger 11 acts as an evaporator. That is, the refrigerant, which has become a high-temperature, high-pressure gas through compression in N&3, is condensed by heat exchange in the water heat exchanger 9, and the condensation heat is given to the circulating water in the circulating water circuit (2). When the liquefied refrigerant then passes through the throttle 17, it becomes low temperature and low pressure due to adiabatic expansion, and in the outdoor air heat exchanger 11, it absorbs heat from the outside air, evaporates, and gasifies. Gasified low-temperature refrigerant is
Returning to the compressor 3 again, the above cycle is repeated.

(7) In the circulating water circuit (■), the valve 26 is closed and the valve 27 is opened, and the circulating water circulates as shown by the arrow. For this reason, the circulating water takes the heat of condensation from the refrigerant in the water heat exchanger 9 and
The circulating water that has reached a temperature of ~50°C is passed through the bypass circuit■'
and passes through the heating auxiliary heat exchanger 10. The heating auxiliary heat exchanger 10 removes engine exhaust heat to further raise the temperature. The circulating water whose temperature has been raised in this way enters the room 25 through the circulating water circuit (2) and is used for heating.

(Cooling operation) As shown in FIG.
and the four-way valve 22 is set.

With this setting, the water heat exchanger 9 acts as a refrigerant evaporator, and the outdoor air heat exchanger 11 acts as a condenser. That is, the refrigerant that has been turned into a high-temperature, high-pressure gas by the compressor 3 is condensed in the outdoor air heat exchanger 11, and radiates the heat of condensation to become a high-temperature, high-pressure liquid. The liquefied refrigerant then becomes a low-temperature, low-pressure liquid due to an adiabatic pressure drop as it passes through the throttle 18 in step (8), and further evaporates in the water heat exchanger 9 by taking heat from the circulating water in the circulating water circuit (2). The gasified refrigerant returns to the compressor 3 again and repeats the above cycle.

In the circulating water circuit (2), the valve 26 is opened and the valve 27 is closed, and the cooled low-temperature circulating water is circulated as shown by the arrow to cool the room 25.

(Cooling + hot water storage operation) As shown in FIG. 13, the three-way valves 21 and 23 and the four-way valve 22 are set so that the refrigerant compressed by compression ta3 flows in the flow path shown by the arrow. In this operation, the ninth
The three-way valve 21 in the cooling operation state shown in the figure is switched so that the refrigerant passage does not pass through the outdoor air heat exchanger 11 but passes through the hot water storage heat exchanger 14. For this reason, the hot water storage heat exchanger 14
acts as a condenser instead of the outdoor air heat exchanger 11,
The heat of condensation generated by the high temperature gas refrigerant is released into the hot water storage tank 1.

(9) (Hot water storage operation) As shown in FIG. 14, the three-way valves 21 and 23 and the four-way valve 22 are set so that the refrigerant compressed by the compressor 3 flows in the flow path shown by the arrow.

Due to this refrigerant flow path, the outdoor air heat exchanger 11 acts as an evaporator, and the hot water storage heat exchanger 14 acts as a condenser. The outdoor air heat exchanger 11 gasifies the refrigerant that has become low temperature and low pressure through the throttle 17, and the hot water storage heat exchanger 14 releases the condensation heat of the high temperature gas refrigerant pressurized by the compressor 3 into the hot water storage tank 1. do.

In the above-described device, the outdoor air heat exchanger 11 has a plate wall shape and is shaped to surround the upper outer periphery of the hot water storage tank 1.
The outdoor air heat exchanger 11 itself does not occupy a large space, and a relatively large space can be formed inside it for storing other components. Therefore, each component does not occupy unnecessary space, and the apparatus can be made compact as a whole.

Furthermore, if the outdoor air heat exchangers (10) 11 are formed into a U-shape in plan view as in the above embodiment, the openings that are not blocked by the plate walls can be effectively used as maintenance work openings. This makes it easier to change oil, replace air cleaner elements, replace oil filters, replace plugs, etc.

In the above-mentioned device, the other components surrounded by the inner space of the plate-walled outdoor air heat exchanger 11 do not have to be all of the devices constituting the heat pump type hot water storage device or the air conditioning device. As in the embodiment shown in FIG. 4, only the engine 2 and the compressor TA3 may be removed from the enclosed space.

Alternatively, as in the embodiments shown in FIGS. 5 and 6, only the engine 2 and compressor 3 may be housed. In this embodiment, the fan 13 is configured to be directly driven by the engine 2. When the fan 13 is directly connected to the engine 2 in this way, the fan 13 rotates in proportion to the rotation of the compressor 3, so that the amount of air blown according to the load of the compressor 3 is given to the outdoor air heat exchanger 11. be able to. In addition, as in the embodiment shown in FIGS. 1 and 2, the engine 2 and the compressor 3 are
is stored in the inner space of the outdoor air heat exchanger 11, the overall pipe length of the refrigerant circuit (■) can be shortened,
Therefore, flow loss in the refrigerant pipe can be reduced. Furthermore, during heating, the exhaust gas from the engine 2 can be blown onto the outdoor heat exchanger 11, so frost formation can be prevented and heat recovery efficiency can be increased.

In the embodiment shown in FIG. 5.6 above, the engine 2 has cylinder 2
Although the cylinder 2a is of a horizontal type, it may be of a vertical type with the cylinder 2a oriented vertically, as in the embodiment shown in FIG.

In addition, as a device to be placed in the inner space of the outdoor air heat exchanger 11, as shown in the embodiment 7 of FIG. It is also possible to do so. In this way, the capacity of the hot water storage tank 1 can be expanded, and the truncated conical part 1a can also be used as a rectifier for the air blown by the fan 13. It can also be used as a support part for supporting the 13 motors 13a.

Further, as shown in the embodiment of FIG. 5 or FIG. 10, when the electronic control box 39 is housed inside the outdoor air heat exchanger 11, the electronic control box 39 is constantly in contact with the outside air. Because it can always be kept at a low temperature,
Improved temperature resistance can extend life.

Additionally, compared to those stored in the engine compartment, it is possible to eliminate condensation.

The embodiment of FIG. 9 differs from the engine 2 in the embodiment of FIG.
Similar to the stay 42 that supported the electronic control box 39
is housed inside the stay 42' of the motor 13a for the fan 13.

In the embodiment shown in FIG. 10, the hot water storage tank 1 is separated into two tanks, and a low temperature tank I is inserted with a hot water storage heat exchanger 14 in the refrigerant circuit (2).
A and a high-temperature tank IB into which an exhaust heat recovery heat exchanger 15 in cooling water circuit (13) is inserted. When two tanks are provided in this manner, the upper surface area of the hot water storage tank increases, so that the inner space surrounded by the plate wall-shaped outdoor air heat exchanger 11 can be further enlarged. Therefore, even though the device becomes larger due to the use of two hot water storage tanks, the other devices can be stored compactly, resulting in a more compact device as a whole.

As described above, the present invention provides a heat pump hot water storage device in which a hot water storage heat exchanger for exchanging heat with hot water in a hot water storage tank is provided in a refrigerant circuit that compresses and circulates refrigerant using a compressor. The outdoor air heat exchanger is formed in the shape of a plate wall along the upper outer periphery of the hot water storage tank, and other structures other than the outdoor air heat exchanger are provided in an inner space surrounded by the outdoor air heat exchanger in the form of a plate wall. Since the configuration is such that the devices are housed, each device constituting the heat pump type hot water storage device is compactly housed above the hot water storage tank, and as a result, the entire device can be made compact (14).

[Brief explanation of drawings]

FIG. 1 is a partially cutaway schematic side view of a device according to an embodiment of the present invention, FIG. 2 is a schematic diagram as viewed from the ■ arrow in FIG. 1, and FIG. 3 is a main part of a device according to another embodiment. FIG. 4 is a schematic side view taken in the direction of the ■ arrow in FIG. , FIG. 6 is a schematic diagram as viewed from the arrow ■ in FIG. 5, FIG. 7 is a schematic side view showing a partially cutaway main part of a device according to another embodiment, and FIG. 8 is a still another embodiment. FIG. 9 is a schematic side view partially cut away showing a device according to another embodiment, FIG. 9 is a schematic side view partially cut away showing a main part of a device according to another embodiment, and FIG. A partially cutaway schematic side view, and Figures 11 to 14 are circuit diagrams of the refrigerant, etc. in the above device.
Figure 12 is during cooling operation, Figure 13 is during cooling + hot water storage operation,
FIG. 14 shows the hot water storage operation. 1. Hot water tank, 2. Engine, 'LA- cylinder, 3. Compressor, 11. Outdoor air heat exchanger,
12...Radiator, 14...Hot water storage heat exchanger, 1
5. Exhaust heat recovery heat exchanger. Agent Patent Attorney Shin Ogawa − Patent Attorney Ken Noguchi Teru Patent Attorney Kazuhiko Saishita Figure 8 Figure 9

Claims (1)

[Claims] In a heat pump hot water storage device, in which a refrigerant circuit that compresses and circulates refrigerant by a compressor is provided with a hot water storage heat exchanger that exchanges heat with hot water in a hot water storage tank, the outdoor air heat exchanger provided in the refrigerant circuit is connected to the hot water storage tank. The tank is formed into a plate wall shape along the upper outer periphery of the tank, and other components other than the outdoor air heat exchanger are housed in an inner space surrounded by the plate wall shaped outdoor air heat exchanger. A heat pump type hot water storage device.