KR100367176B1 - Heat pump type air conditioning apparatus - Google Patents

Abstract

The present invention relates to a heat pump type air-conditioning apparatus, which prevents frost from forming in an outdoor heat exchanger when heating temperature is low during heating, or quickly removes frost caused by heating, thereby increasing heating efficiency and radiating heating simultaneously with convective heating. It is.

The present invention provides a conduit (8a) through a compressor (2), a four-way valve (3), an indoor heat exchanger (4), a pressure reducing mechanism (5) (6), an outdoor heat exchanger (7) and the four-way valve (3). 8d), in the refrigerant circuit (1) in which the four-way valve (3) and the compressor (2) are connected to the suction conduit (9), between the compressor (2) and the four-way valve (3). A second heating circuit (10) installed in the conduit (8a) and an auxiliary heat exchanger (24) connected to the second heating circuit (10) and installed on at least one side of the outdoor heat exchanger (7). It is.

Description

Heat Pump Air Conditioning Unit {HEAT PUMP TYPE AIR CONDITIONING APPARATUS}

The present invention relates to a heat pump type air conditioner.

As is well known, the heat pump type air conditioner is a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger, and the four-way valve in order to connect the conduit, and the four-way valve and the compressor to a suction conduit. In the heating operation, the 4-way valve is operated to circulate the refrigerant to the indoor heat exchanger, condensing the refrigerant gas of the high temperature and high pressure compressed by the compressor in the indoor heat exchanger acting as a condenser, and heating the indoor air by the heat of condensation. , The high temperature and high pressure refrigerant liquid condensed in the indoor heat exchanger is expanded by the expansion valve, and the outdoor heat exchanger acting as an evaporator evaporates the outside air as a heat source to make the gas state at low temperature and low pressure, and then repeats the cycle of being sucked into the compressor. It is.

In the cooling operation, the four-way valve is operated to circulate the refrigerant to the outdoor heat exchanger to condense the high-pressure and high-pressure refrigerant gas compressed by the compressor in the outdoor heat exchanger acting as a condenser, and the high-temperature high-pressure refrigerant condensed in the outdoor heat exchanger. After the liquid is expanded in the expansion valve, the refrigerant liquid is evaporated in the indoor heat exchanger acting as an evaporator to cool the indoor air by the evaporation heat to cool the air. The refrigerant gas of low temperature and low pressure evaporated from the indoor heat exchanger is sucked into the compressor. To repeat.

In addition, the heating methods in some Asian countries, including Korea, are generally equipped with a hot water or steam radiant heating method in which a radiating coil is installed on the floor or a radiator is installed in the room, and the radiant heating method has many advantages over the convection heating method. It is true.

On the other hand, the heat pump type air conditioner is a heat source in the outdoor heat exchanger during the heating operation, when the coolant liquid is evaporated when the outside air temperature is low, the frost on the surface of the outdoor heat exchanger is not good evaporation of the refrigerant liquid. Since the heating capacity is significantly lowered, much effort is being made to promote the evaporation of refrigerant gas sucked into the compressor.

For example, Japanese Patent Application Laid-open No. 54-45949 discloses a refrigerant heater in a heating circuit, which serves as an evaporator during heating operation, and condenses and liquefies the refrigerant gas compressed by the compressor in an indoor heat exchanger. A cooling and heating device is disclosed in which a heating capacity is not deteriorated even when the outside air temperature is low by evaporating the refrigerant liquid depressurized by a heating decompression mechanism in a refrigerant heater, and Japanese Patent Application Publication No. 55-5017. In the first cycle, a plurality of outdoor heat exchangers are installed to simultaneously operate the plurality of heat exchangers as a condenser when cooling, and to act as an evaporator during heating, and a high temperature and high pressure refrigerant gas flowing directly into the indoor heat exchanger from the compressor. Classifying a portion of the heat exchanger into the plurality of outdoor heat exchangers to A heat pump type air-conditioning apparatus is provided with a flow path switching device for switching a second cycle in which one acts as a condenser and the other as an evaporator. The present inventors also provide a compressor, a conversion valve, an indoor heat exchanger, and an air conditioner. A refrigerant circuit in which a pressure reducing device, a heating pressure reducing device, and an outdoor heat exchanger are connected to a first conduit and a refrigerant gas suction pipe, comprising: a first heat exchanger provided between the indoor heat exchanger of the first conduit and a pressure reducing device for heating, and the first conduit And a second heat exchanger installed between the outdoor heat exchanger and the conversion valve in a position above the first heat exchanger, the second heat exchanger being connected to form a closed circuit through a connection tube provided with the first heat exchanger and the valve. The working fluid is charged into the second heat exchanger and compressed using the refrigerant liquid condensed and liquefied in the indoor heat exchanger as a heat source. Refrigerant liquid and the refrigerant gas evaporated by the heat pump type air conditioner for facilitating ever entering the bar has an arc 1998 filed patent application No. 1344.

However, Japanese Patent Application Laid-open No. 54-45945, which is designed to use a refrigerant heater as an evaporator during heating operation, does not describe specific technical means of the refrigerant heater. Maintenance costs are inevitably high due to the use of easy heat transfer, and Japanese Patent Application Publication No. 55-5017 discloses high temperature and high pressure compressed by a compressor when frost is formed in an outdoor heat exchanger due to a decrease in outside temperature during heating. Since some of the refrigerant gas is classified and used, the capacity of the compressor must be increased to increase the installation cost and maintenance cost. Also, the inventors of the present invention do not sufficiently evaporate the refrigerant liquid in the outdoor heat exchanger when the outside air temperature is low. There is a problem in that the structure is complicated and the maintenance cost is high because it must use the auxiliary heating means.

In addition, the heat pump type air conditioner and the like is a convective heating method, compared to the radiant heating method, the indoor top and bottom temperature difference is a lot of noise, and the airflow is in contact with the skin of the occupant has a problem that the comfort falls.

In view of the above circumstances, an object of the present invention is to provide a heat pump type heating and cooling device that can increase the heating efficiency by preventing frost from occurring in an outdoor heat exchanger when the outdoor air temperature is low during heating or by removing the frost quickly. .

Another object of the present invention is to provide a heat pump type heating and cooling device capable of radiant heating simultaneously with convective heating.

In order to achieve the above object, the present invention connects the compressor, four-way valve, indoor heat exchanger, pressure reducing mechanism, outdoor heat exchanger and the four-way valve in order to the conduit, the four-way valve and the compressor to the suction conduit A refrigerant circuit connected therewith includes a second heating circuit provided in a conduit between the compressor and the four-way valve, and an auxiliary heat exchanger connected to the second heating circuit and installed on at least one side of the outdoor heat exchanger. .

1 is a block diagram of an embodiment of the present invention.

2 is an enlarged cross-sectional view of an essential part of an embodiment of the present invention;

<Description of Signs of Major Parts of Drawings>

1: refrigerant circuit 4: indoor heat exchanger 7: outdoor heat exchanger

10 second heating circuit 13 heat exchanger 14 endothermic heat exchanger

15: heat storage tank 17: radiant heat generating means

24: auxiliary heat exchanger 241: evaporation tube 242: heat dissipation tube

243: heating tube

1 is a configuration diagram of an embodiment of the present invention, 1 is a refrigerant circuit, the refrigerant circuit 1 is a compressor (2), a four-way valve (3), an indoor heat exchanger (4), a cooling pressure reducing mechanism ( 5), the pressure reducing mechanism (6) for heating, the outdoor heat exchanger (7), and the four-way valve (3) are connected by conduits (8a-8d), and the four-way valve (3) and the compressor (2) are connected to the suction conduit. By connecting to (9), the refrigerant is circulated by the arrow solid line during the heating operation and the arrow dotted line during the cooling operation so that the indoor heat exchanger 4 acts as a condenser when heating and as an evaporator when heating.

10 is a second heating circuit, and the second heating circuit 10 has a bypass conduit 11 connected to a conduit 8a connecting the compressor 2 and the four-way valve 3 to the inlet side thereof. The heat exchanger 13 is installed in the bypass conduit 11 at the same time as the valve 12, and maintains a heat exchange relationship with the heat exchanger 13 between the heat exchanger 13 and the heat storage tank 15. Radiant heat generating means such as a heat radiating coil or a radiator installed at the bottom of the heat storage tank 15 in which the endothermic heat exchanger 14 is installed as a circulation conduit 16, and the indoor heat exchanger 4 is installed at the other side of the heat storage tank 15. (17) is provided by connecting pipes 18 and 18 '.

The heat storage tank 15 has a heat storage container 19 in which a heat storage material 20 such as a normal latent heat is sealed and a plurality of distribution pipes 21 are installed therein, and a heat storage heater for a late night electric under the heat storage container 19. (22) and a hot water heating tube 23 for circulating the hot water generated in, for example, bathroom waste hot water, a solar collector, and the like as an unheated heat source.

24 is an auxiliary heat exchanger, and the auxiliary heat exchanger 24 is installed on at least one side of the outdoor heat exchanger 7 and preferably on both sides of the outdoor heat exchanger 7 to connect the heat storage tank 15 to the connection pipe. It is connected to the return pipe 26 provided with the supply pipe 25 and the circulation pump 26 'on the 18' side.

In addition, the auxiliary heat exchanger (24) is installed in the evaporator tube 241 vertically to the heat dissipation tube 242 as shown in Figure 2 to vacuum the working fluid such as distilled water, alcohol, etc. And a heat pipe having a heating tube 243 connected to the supply pipe 25 and the return tube 26 in the evaporation tube 241, and a baffle 244 in the heating tube 243. The internal heat transfer efficiency is increased, and the evaporator tube 241 is wound with a freeze prevention heat transfer heater 245.

Reference numerals 27 and 28 are shank valves, 29 are valves, and 30 and 31 are fans.

In the present invention as described above, the three-way valve 12 is operated to circulate the refrigerant only to the conduit 8a side during the heating operation, and the four-way valve 3 is operated to circulate the refrigerant in the solid arrow line and then the compressor 2 ), The high-temperature, high-pressure refrigerant gas compressed by the compressor (2) flows into the indoor heat exchanger (4), which acts as a condenser, and condensation heats the room air by the heat of condensation. After expanding under reduced pressure in the cooling pressure reducing mechanism (6) via the check valve (27), the outdoor heat exchanger (7) serving as an evaporator evaporates the outside air to a heat source to form a refrigerant gas of low temperature and low pressure, and then supplies it to the compressor (2). Repeated suction cycle, when cooling, the three-way valve 12 is operated so that the refrigerant flows only to the conduit (8a) side, the four-way valve (3) is operated to circulate the refrigerant in the dotted line of the compressor (2) ), The high temperature and high pressure cold compressed by the compressor (2) Medium gas flows into the outdoor heat exchanger 7 acting as a condenser, and the condensed refrigerant liquid is expanded through the check valve 28 in the cooling decompression mechanism 5 and then acts as an evaporator. As the inlet evaporates, the air is cooled and cooled by the heat of evaporation, and the cycle suctioned by the compressor 2 is repeated.

As described above, when the outside air temperature is low during the heating operation, the evaporation of the coolant liquid is low in the outdoor heat exchanger 7, and the heating capacity is lowered. In this case, the three-way valve 12 passes through the refrigerant gas bypass conduit. When operating to circulate also to the (11) side, the high-temperature, high-pressure refrigerant gas compressed by the compressor (2) forms the heating cycle as described above and condenses heat when passing through the heat exchanger (13) while circulating the bypass conduit (11). The heat medium circulating through the endothermic heat exchanger 14 which maintains a heat exchange relationship with the heat exchanger 13 by the heat of condensation is heated and stored in the heat storage tank 15.

The heated heating medium stored in the heat storage tank 15 closes the valve 29 installed in the connecting pipe 18 of the radiant heat generating means 17, and drives the circulating pump 26 ′ via the supply pipe 25. By circulating the heating tube 243 embedded in the evaporation tube 241 of the auxiliary heat exchanger 24, the heat exchanger with the working fluid filled in the evaporation tube 241 to evaporate the working fluid and then through the return tube 26. The circulation cycle returned to the heat storage tank 15 is repeated.

On the other hand, the working fluid evaporated in the evaporation tube 241 is condensed by the outside air while descending to the heat dissipation tube 242, and the operation of repeatedly descending to the evaporation tube 241, and at the same time the heat of the condensation of the outdoor heat exchanger (7) Is to release the outside air to heat the outside air. The outside air heated as described above is sucked into the outdoor heat exchanger 7 by driving the fan 31 to promote or encourage the evaporation of the refrigerant liquid in the outdoor heat exchanger 7. By quickly removing frost or condensation, the heating capacity is not reduced even when the outside air temperature is low.

In addition, as described above, when the room is convectionly heated by the condensation heat discharged from the indoor heat exchanger 4, the valve 29 is opened and the radiant heat generating means 17 embedded or installed in the floor where the indoor heat exchanger 4 is installed. When radiant heating is performed by circulating the heat medium and radiating heat in the room, the heating in the room is the convective heating and the radiant heating at the same time, thereby reducing the temperature difference in the room, and controlling the three-way valve 12 to heat the indoor heat exchanger (4 By reducing the amount of refrigerant gas circulating) and reducing the heat of condensation emitted from the indoor heat exchanger (4) and at the same time reducing the number of revolutions of the fan 30, the noise is reduced and the amount of air flow to reach the skin of the occupant is less Comfortable heating is possible.

In addition, as described above, during the late-night time zone during the evaporation promotion and radiant heating operation of the coolant liquid in the outdoor heat exchanger (7), the heat medium is heated by the heat heater with heat or the like during the daytime to the heat storage material (20). By storing and using it, not only the efficiency can be increased but also the driving maintenance cost of the compressor 2 can be reduced.

In addition, since the baffle 244 is embedded in the heating tube 243, the heat medium circulating in the heating tube 243 performs turbulent flow, so that the heat exchange between the heat medium and the working fluid is good, and the evaporation efficiency of the working fluid is increased. The freezing prevention heat transfer heater 245 is wound around the tube 241 to prevent freezing when the auxiliary heat exchanger 24 is not in operation.

As described above, the present invention provides a second heating circuit in a conduit between the compressor and the four-way valve of the heat pump system, and connects the auxiliary heat exchanger installed around the outdoor heat exchanger to the second heating circuit, even when the outside air temperature is low. It is possible to quickly remove frost or condensation on the outdoor heat exchanger, so that the evaporation of the coolant liquid in the outdoor heat exchanger is good and the coefficient of performance is improved, so that the heating capacity can be maintained satisfactorily and the radiant heat to the second heating circuit. By installing the generating means and radiating heating simultaneously with convective heating, the temperature difference in the room can be reduced, the noise can be reduced, and the comfortable heating can be achieved.

In addition, by installing a heat storage tank in the second heating circuit, by installing a hot water heating tube heated by a midnight electric heater and a non-heating heat source thereunder, the efficiency can be increased and the maintenance cost of the compressor can be reduced.

Claims (5)

In a refrigerant circuit in which a compressor, a four-way valve, an indoor heat exchanger, a pressure reducing device, an outdoor heat exchanger, and the four-way valve are connected in sequence with a conduit, and the four-way valve and the compressor are connected with a suction conduit, And a second heating circuit provided in a conduit between the valves and an auxiliary heat exchanger connected to the second heating circuit and installed on at least one side of the outdoor heat exchanger. The heat pump type air-conditioning apparatus according to claim 1, wherein radiant heat generating means attached to one side of the second heating circuit is installed at an indoor heat exchanger installation position. The heat exchanger of claim 1, wherein the second heating circuit connects a bypass conduit to a conduit connecting the compressor and the four-way valve, and installs a heat exchanger, and installs an endothermic heat exchanger maintaining a heat exchange relationship with the heat exchanger between the heat exchanger and the heat storage tank. One heat pump air conditioner. The heat pump type air-conditioning apparatus according to claim 1, wherein the auxiliary heat exchanger has a heat dissipation tube installed vertically in the evaporation tube to vacuum-fill the working fluid therein and a heating tube in the evaporation tube. The heat storage type air conditioner according to claim 3, wherein the heat storage tank includes a heat storage container in which a heat storage material is sealed, and a hot water heating tube for circulating hot water generated by a midnight electric heater and a non-heating heat source below the heat storage container. .