JP2002243207A - Refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an adverse influence by condensate adhered to an accumulator 10. SOLUTION: The accumulator 10 is situated in a heat exchanger chamber E. This constitution prevents absorption of condensate adhered to the accumulator 10 by the sound insulation material of a compressor 6 and prevents the increase of humidity as a result of condensate adhered to the accumulator 10 being vaporized and a compressor C being filled therewith. An adverse influence exerted thereby can be eliminated. Further, by supplying air to the accumulator 10 by a fan 13, a low temperature refrigerant therein absorbs heat and heating performance of a refrigerating cycle is improved. Further, by situating the accumulator 10 in a space between an air heat exchanger 9 and the fan 13, the space can be effectively used and the device can be constituted in a small size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system using a refrigerant compression refrigeration cycle as a means for heating a fluid such as water or air, and more particularly to a structure of an outdoor unit.

[0002]

2. Description of the Related Art FIG. 7 shows the structure of an outdoor unit 20a of a conventional home air conditioner. Looking at the structure, a room (compressor room C) including the compressor 6, refrigerant circuit components, and electric circuit components, and a room including the heat exchanger 9 and the fan & motor 13 that blows outside air to the heat exchanger 9 (Heat exchanger room E) is divided by a partition plate 15 for partitioning the ventilation portion. The accumulator 10, which is a refrigerant circuit component, also returns oil to the compressor 6, and so on.
The compressor 6 is set in the compressor room C as a set.

[0003] In recent years, there is a heat pump water heater using the heat of condensation of refrigerant in a refrigeration cycle. FIG. 6 shows the structure of a water heater main body 1a. Also in this water heater, the compressor room C and the heat exchanger room E that exchanges heat with the outside air are divided by the partition plate 15, similarly to the outdoor unit 20a of the home air conditioner, and the accumulator 10 is 6 and set in the compressor room C.

[0004]

However, since this accumulator is a tank for storing low-pressure low-temperature refrigerant flowing out of a heat exchanger serving as an evaporator in a refrigerant compression refrigeration cycle, the refrigerant flows during operation. In such a state, the temperature is always low, and condensed water may adhere to the surface of the accumulator due to the temperature difference from the outside air.

Around the compressor, a sound insulating material such as felt is often wound around the compressor in order to isolate the operating noise generated by the compressor. There is a problem that the sound insulation effect is reduced.

Further, since the compressor room is partitioned from the ventilation portion by the fan with a partition plate, the air permeability is poor, and condensed water attached to the accumulator evaporates and stays in the compressor room to become highly humid. This may cause problems such as condensation and corrosion.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a refrigeration apparatus which can eliminate the adverse effect of condensed water on an accumulator.

[0008]

In order to achieve the above object, the present invention employs the following technical means.

The invention according to claim 1 is characterized in that the accumulator (10) is arranged in the heat exchanger chamber (E).

[0010] Accordingly, the sound insulating material of the compressor does not absorb the condensed water attached to the accumulator, and the condensed water attached to the accumulator does not evaporate and stay in the compressor room to increase the humidity. The adverse effects of them can be eliminated. In addition, by blowing air to the accumulator by the fan, the medium low-temperature refrigerant absorbs heat, and the heating performance of the refrigeration cycle is improved.

According to the second aspect of the present invention, the accumulator (1) is provided downstream of the air passing through the second heat exchanger (9).
0) is arranged.

Thus, the same effect as the first aspect can be obtained. In the accumulator, the refrigerant temperature is lower than that of the second heat exchanger by an amount corresponding to the pressure loss of the pipes or the like. Performance is improved. Further, for example, by inserting the accumulator into the space between the second heat exchanger and the fan, the space can be used effectively and the device can be made compact.

According to a third aspect of the present invention, the accumulator (10) is arranged so that outside air is blown in parallel with the second heat exchanger (9) and the accumulator (10).

Thus, the same effects as those of the first aspect can be obtained, and in particular, the external air directly hits the accumulator,
The larger the temperature difference with the low-temperature refrigerant, the greater the amount of heat absorption.

In the invention according to claim 4, the unit (1)
a) is a water heater main body.

Thus, the hot water supply performance can be improved without increasing the size of the main body.

In the invention according to claim 5, the unit (20)
a) is an outdoor unit of an air conditioner.

Thus, the heating performance can be improved without increasing the size of the outdoor unit.

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0020]

Next, a refrigerating apparatus of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 2 shows a first embodiment of the present invention.
It is a schematic diagram which shows the structure of the heat pump type water heater in 2nd Embodiment.

This embodiment is a heat pump type water heater 1 using a refrigeration cycle, and a hot water storage tank 2 for storing hot water, and a flowing water pipe 3 connected to the hot water storage tank 2.
And a water pump 4 for flowing hot water for supply through the flowing water pipe 3 and a supercritical heat pump cycle, which will be described later, which is a heating means for hot water for hot water. A portion other than the hot water storage tank 2 (a portion surrounded by a two-dot chain line in FIG. 2) is configured as a water heater main body 1a.

The hot water storage tank 2 is made of a metal (for example, stainless steel) having excellent corrosion resistance and has a heat insulating structure, and can keep hot hot water for a long time. The hot-water supply water stored in the hot-water storage tank 2 is used mainly in kitchens and baths after mixing with cold water at the time of use and adjusting the temperature. In addition to hot water supply, for example, floor heating, indoor air conditioning, etc. Can also be used as a heat source.

The flowing water pipe 3 is composed of a cold water pipe 3a and a hot water pipe 3b for connecting the hot water storage tank 2 and a water heat exchanger 7 described later. The cold water pipe 3a has one end connected to a cold water outlet 2a provided at a lower portion of the hot water storage tank 2, and the other end connected to an inlet of a water passage (not shown) provided in the water heat exchanger 7. One end of the hot water pipe 3b is connected to the outlet of the water passage, and the other end is connected to a hot water inlet 2b provided at an upper part of the hot water storage tank 2.

As shown by the arrow in FIG. 2, the water pump 4 allows hot water supply water in the hot water storage tank 2 to flow from the cold water outlet 2a through the cold water pipe 3a, through the water passage, and through the hot water pipe 3b.
A water flow is generated so as to return to the hot water storage tank 2 from b.
This water pump 4 can adjust the amount of flowing water according to the rotation speed of a built-in motor (not shown).

As shown in FIG. 2, the supercritical heat pump cycle includes a compressor 6, a water heat exchanger 7 as a first heat exchanger, an electric expansion valve 8a as a pressure reducing means 8, and a second heat exchanger. Air heat exchanger 9, accumulator 10, and refrigerant pipes (high-pressure pipe 11 and low-pressure pipe 1
2) and the like, and carbon dioxide (CO ₂ ) having a low critical pressure is sealed as a refrigerant.

The compressor 6 is driven by a built-in motor (not shown), and compresses and discharges the sucked gas refrigerant to a critical pressure or higher. The refrigerant discharge amount of the compressor 6 varies according to the number of rotations of the motor.

The water heat exchanger 7 exchanges heat between high-temperature and high-pressure gas refrigerant pressurized by the compressor 6 and hot-water supply water. A refrigerant passage (not shown) is provided adjacent to the above-mentioned water passage. The flow direction of the refrigerant flowing through the refrigerant passage and the flow direction of the hot-water supply water flowing through the water passage are configured to face each other.

The electric expansion valve 8a is provided between the water heat exchanger 7 and the air heat exchanger 9, and supplies the air cooled by the water heat exchanger 7 to the air heat exchanger 9 under reduced pressure. The electric expansion valve 8a has a configuration in which the valve opening can be electrically adjusted.
The energization is controlled by a control device (not shown).

The air heat exchanger 9 receives the air blown by the outside air fan 13 and evaporates the refrigerant decompressed by the electric expansion valve 8a by heat exchange with the outside air.

The accumulator 10 includes the air heat exchanger 9
The refrigerant evaporated in the step is vapor-liquid separated to store the excess refrigerant in the cycle, and only the gas refrigerant is sucked into the compressor 6.

Next, normal cycle operation will be described.

The refrigerant is pressurized by the compressor 6 to become a high temperature and a high pressure, radiated to the hot water supply water by the water heat exchanger 7 and cooled, supplied to the electric expansion valve 8a, and adjusted according to the opening degree of the electric expansion valve 8a. The pressure is reduced. The depressurized low-temperature low-pressure refrigerant absorbs heat from the outside air in the air heat exchanger 9 (outside air fan: ON), evaporates, is separated into gas and liquid by the accumulator 10, and then only the gas refrigerant is sucked into the compressor 6. repeat.

The hot-water supply water is pressurized by the water pump 4, absorbs heat from the refrigerant in the water heat exchanger 7 to become hot water, and is sent to the hot water storage tank 2 to be stored. And hot water storage tank 2
When it is detected by a water temperature sensor (not shown) that the inside becomes hot water and the temperature of the water supply from the cold water pipe 3a becomes high, the circulation of the refrigerant and the hot water is stopped.

Next, the main part of the present invention will be described.

FIG. 1 is a plan structural view of a heat pump water heater main body 1a according to a first embodiment of the present invention. The inside is divided by a partition plate 15 for partitioning a ventilation portion, and a compressor room C in which one compressor 6 is accommodated is provided with:
In addition to the compressor 6, electric circuit components such as a water pump 4, a water heat exchanger 7, an electric expansion valve 8a, and a control device (not shown) are housed.

In the heat exchanger room E in which the other air heat exchanger 9 is accommodated, the air heat exchanger 9 and a fan & motor 13 for blowing outside air to the heat exchanger 9 are housed. According to the present invention, the accumulator 10 which has been conventionally arranged in the compressor room C as a set with the compressor 6 is arranged in the space between the air heat exchanger 9 and the fan 13 in the heat exchanger room E. ing.

Accordingly, the sound insulating material of the compressor 6 does not absorb the condensed water attached to the accumulator 10, and the condensed water attached to the accumulator 10 evaporates and stays in the compressor chamber C to increase the humidity. Will not be
The adverse effects of them can be eliminated.

The accumulator 10 also has a fan 1
When the air is blown by 3, the low-temperature refrigerant inside absorbs heat, and the heating performance of the refrigeration cycle is improved. This is because the refrigerant temperature in the accumulator 10 is lower than that of the air heat exchanger 9 by the pressure loss of the pipe or the like. That's why.

By inserting the accumulator 10 into the space between the air heat exchanger 9 and the fan 13, the space can be used effectively and the device can be made compact.

(Second Embodiment) FIG. 3 is a plan view of a heat pump water heater main body 1a according to a second embodiment of the present invention. The difference from the first embodiment in FIG. 1 is that the accumulator 10 is arranged so that outside air is blown in parallel with the air heat exchanger 9 and the accumulator 10.

As a result, the same effects as those of the first embodiment can be obtained, and in particular, the outside air directly hits the accumulator 10, and the amount of heat absorption increases due to a large temperature difference between the accumulator 10 and the low-temperature refrigerant.

(Third Embodiment) In this embodiment, the present invention is applied to a home heat pump air conditioner 20 using a refrigeration cycle. FIG. 4 is a schematic diagram illustrating a configuration of a heat pump air conditioner according to a third embodiment of the present invention.

The heat pump cycle in the air conditioner 20 is configured by connecting the respective functional members with refrigerant pipes. During indoor heating, the compressor 6 → the four-way valve 5 → the indoor heat exchanger 7 (first heat exchanger) The refrigerant flows in the order of → the capillary tube 8b (the decompression means 8) → the outdoor heat exchanger 9 (the second heat exchanger) → the four-way valve 5 → the accumulator 10 → the compressor 6 for heating (arrows in the figure) for heating.

At the time of indoor cooling, the refrigerant flows in the order of compressor 6 → four-way valve 5 → outdoor heat exchanger 9 → capillary tube 8b → indoor heat exchanger 7 → four-way valve 5 → accumulator 10 → compressor 6. It is cooling down.

The indoor heat exchanger 7 functions as a condenser during heating and functions as an evaporator during cooling. The outdoor heat exchanger 9 functions as an evaporator during heating and functions as a condenser during cooling. The indoor heat exchanger 7 and the outdoor heat exchanger 9 have fans 13 and 14 connected to a motor.
Is attached. The capillary tube 8b functions as the pressure reducing means 8 both during heating and during cooling.

In the heat pump type air conditioner 20 having the above configuration, the indoor heat exchanger 7 and the fan 14 among the constituent elements constitute an indoor unit 20b, and the others constitute an outdoor unit 20a. Each of the outdoor units 20a has a structure in which each of the above-described components is incorporated in a storage case made of resin or metal, and is installed at appropriate locations inside and outside the room.

The heat pump type air conditioner 20
It has a control device that is a control means including an electronic circuit (not shown), and the control device inputs information from a controller (not shown) provided in a room, an outside air temperature sensor, a refrigerant temperature sensor, a water temperature sensor, and the like (not shown). The operation of the indoor unit 20b and the outdoor unit 20a is controlled.

Next, a basic operation in the present embodiment will be described based on the above configuration.

The control unit is a heat pump type air conditioner 20
When the power is supplied to the controller, either the control process during the heating operation or the control process during the cooling operation is executed based on information from a controller (not shown).

First, the operation during the heating operation will be described.

For example, when the outside air temperature is low, a heating switch of a controller (not shown) is turned on, and when an ON signal is input to the control device, the control device executes a control process during a heating operation. The control device switches the four-way valve 5 to the heating side (solid line), starts the motor, and drives the compressor 6. The high-temperature gas refrigerant that has exited the compressor 6 passes through the four-way valve 5, condenses in the indoor heat exchanger 7 and performs heating, is decompressed in the capillary tube 8b, evaporates in the outdoor heat exchanger 9, and evaporates. After passing through the valve 5 again, the gas and liquid are separated by the accumulator 10 and returned to the compressor 6.

Next, the operation during the cooling operation will be described.

For example, when the outside air temperature is high, a cooling switch of a controller (not shown) is turned on, and when an ON signal is input to the control device, the control device executes control processing during cooling operation. The control device switches the four-way valve 5 to the cooling side (broken line) and starts the motor to drive the compressor 6. The high-temperature gas refrigerant that has exited the compressor 6 passes through the four-way valve 5, condenses in the outdoor heat exchanger 9, is depressurized in the capillary tube 8b, evaporates in the outdoor heat exchanger 9, and performs cooling. After passing through the valve 5 again, gas-liquid separation is performed by the accumulator 10 and the flow returns to the compressor 6.

Next, the features of this embodiment will be described.

FIG. 5 is a plan structural view of the outdoor unit 20a. The interior is divided by a partition plate 15 for partitioning a ventilation portion, and a compressor room C in which one compressor 6 is accommodated.
In addition to the compressor 6, the four-way valve 5, the capillary tube 8b, and electric circuit components such as a control device (not shown) are stored.

The heat exchanger room E, in which the other outdoor heat exchanger 9 is accommodated, houses the air heat exchanger 9 and a fan & motor 13 for blowing outside air to the heat exchanger 9. Also in the present embodiment, the accumulator 10 which has conventionally been arranged as a set with the compressor 6 in the compressor room C is arranged in the space between the outdoor heat exchanger 9 and the fan 13 in the heat exchanger room E. are doing.

Thus, the heat pump air conditioner 20
In this case, the same effect as the heat pump water heater 1 of the first embodiment can be obtained, and the heating performance can be improved without increasing the size of the outdoor unit 20a.

[Brief description of the drawings]

FIG. 1 is a plan structural view of a heat pump water heater main body according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a configuration of a heat pump water heater according to first and second embodiments of the present invention.

FIG. 3 is a plan structural view of a heat pump water heater main body according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a configuration of a heat pump air conditioner according to a third embodiment of the present invention.

FIG. 5 is a plan structural view of an outdoor unit of a heat pump air conditioner according to a third embodiment of the present invention.

FIG. 6 is a plan structural view of a conventional heat pump water heater main body.

FIG. 7 is a plan view of an outdoor unit of a conventional heat pump air conditioner.

[Explanation of symbols]

 1a Water heater main unit (unit) 6 Compressor 1 Water heat exchanger, indoor heat exchanger (first heat exchanger) 2 Decompression means 9 Air heat exchanger, outdoor heat exchanger (second heat exchanger) 10 Accumulator 15 Partition plate 20a Outdoor unit (unit) of air conditioner C Compressor room E Heat exchanger room

Claims (5)

[Claims] Heat exchange between a compressor (6) for pressurizing and discharging a sucked refrigerant, a refrigerant pressurized by the compressor (6), and a fluid supplied separately from the refrigerant. A first heat exchanger (7) for performing pressure reduction, a decompression means (8) for decompressing the refrigerant flowing out of the first heat exchanger (7), and a refrigerant decompressed by the decompression means (8) with air and heat. A second heat exchanger (9) to be exchanged, and a second heat exchanger (9) provided between the second heat exchanger (9) and the compressor (6) to store excess refrigerant in the refrigeration cycle and to remove only gas refrigerant from the refrigerant. A refrigerating cycle including an accumulator (10) to be sucked by the compressor (6); and at least the compressor (6) and the second heat exchanger (9).
Is divided into two spaces by a partition plate (15), and one of the units is a compressor chamber (C) containing at least the compressor (6). And the other is a refrigeration apparatus having a heat exchanger chamber (E) accommodating at least the second heat exchanger (9), wherein the accumulator (10) is provided in the heat exchanger chamber (E).
A refrigeration apparatus characterized by being arranged in a refrigerator. 2. The refrigeration system according to claim 1, wherein the accumulator (10) is arranged downstream of the air passing through the second heat exchanger (9). 3. The accumulator (10) is arranged so that outside air is blown in parallel with the second heat exchanger (9) and the accumulator (10). Refrigeration equipment. 4. The refrigeration apparatus according to claim 1, wherein the unit (1a) is a water heater main body. 5. The air conditioner according to claim 1, wherein the unit (20a) is an outdoor unit of an air conditioner.
The refrigeration apparatus according to any one of the above.