KR100567650B1 - Oxygen-gas heat pump air-conditioner (oxygen ghp) improving efficiency of oxygen generation through heat exchanging between refrigerant piping of ghp and oxygen generator - Google Patents

Abstract

The present invention relates to a GHP air conditioner having an oxygen generator heat exchanged with the GHP refrigerant pipe to increase the oxygen generation efficiency, the object of which is to supply oxygen to the room by installing a PSA oxygen generator (2) to the GHP air conditioner, (2) Simplify the internal device configuration of oxygen generator (2) by not having a separate water separation system, and compressed air of lower temperature (below 30 ℃) without using air-cooled heat exchanger such as fan The present invention provides an apparatus having a high heat exchange efficiency so as to increase the oxygen concentration in the air supplied to the zeolite 211 in the 21.

The configuration of the present invention is a branch refrigerant pipe (1 ') branched from the refrigerant pipe (1) of the GHP air conditioner; An oxygen generator (2) which heat-exchanges with the branched refrigerant pipe (1 ') and supplies low-temperature compressed air to the zeolite (211) to supply air having increased oxygen purity to the room; It is characterized by consisting of a heat exchange unit (3) for heat exchange between the branch refrigerant pipe (1 ') and the oxygen generator (2).

GHP, branch refrigerant piping, oxygen generator, heat exchange

Description

Oxygen-Gas Heat Pump Air-conditioner (Oxygen GHP) improving efficiency of oxygen generation through heat exchanging between refrigerant piping of GHP and Oxygen Generator}             

1 is an overall refrigerant system diagram of a GHP air conditioner equipped with an oxygen generator according to an embodiment of the present invention for cooling,

2 is an overall refrigerant system diagram when heating a GHP air conditioner equipped with an oxygen generator according to an embodiment of the present invention.

3 is a schematic diagram of a schematic installation configuration of an embodiment of the present invention;

4 is a system diagram showing a refrigerant flow at the time of cooling of the embodiment 3,

FIG. 5 is a system diagram showing a refrigerant flow at the time of heating of FIG.

Figure 6 is a schematic view showing a schematic installation configuration of another embodiment of the present invention,

7 is a system diagram showing a refrigerant flow at the time of cooling of the embodiment of FIG.

8 is a schematic diagram showing a refrigerant flow during heating of the embodiment of FIG.

9 is a detailed configuration diagram of the drain portion of the present invention.

<Description of Symbols for Main Parts of Drawings>

(1): refrigerant piping (1 '): branch refrigerant piping

(2): oxygen generator (3): heat exchanger

(11 ', 13'): Solenoid Valve (12 '): Check Valve

(21): oxygen generating body (22): compressor

23: drain portion 211: zeolite

(212): nitrogen discharger (221): compressed air supply pipe

(231): Demister (232): floating valve

(233): outlet

The present invention relates to a GHP air conditioner having an oxygen generator which is heat-exchanged with a GHP refrigerant net environment furnace to increase oxygen generation efficiency.

The cooling and heating principle of the GHP system, which is recently increasing in usage, is as follows.

At the time of heating, the gas engine is operated to drive the refrigerant gas compressor, and the high-temperature, high-pressure refrigerant gas compressed by the compressor is sent to the indoor unit, and the heat exchanger of the indoor unit exchanges heat with indoor air (in this case, the room is heated). The refrigerant gas expands through the expansion valve, and the coolant liquid of medium temperature and medium pressure becomes the coolant liquid of low temperature and low pressure. The refrigerant liquid passing through the expansion valve is sent to the outdoor unit, and passes through the heat exchanger of the filter drier, removes a small amount of water and dust in the system, and changes to the refrigerant gas of low temperature and low pressure while passing through the outdoor cooler and outdoor heat exchanger. After returning to the accumulator through a double-tube heat exchanger (engine coolant and exhaust gas heat exchange), which is a device that recycles the exhaust heat generated when the engine is driven, the refrigerant compressor compresses the refrigerant gas and recompresses the refrigerant gas as described above. The gas is sent to the indoor unit to condense and the heating cycle operation is continued by performing the expansion and evaporation processes in the same manner as below.

In addition, during cooling, the refrigerant gas is compressed in the refrigerant compressor, and the refrigerant gas is condensed by passing through the outdoor unit's subcooler and the outdoor unit heat exchanger (when heating, it functions as an evaporator and when cooling, it serves as a condenser). The condensed refrigerant liquid expands on the expansion side of the indoor unit and evaporates in the heat exchanger of the indoor unit. At this time, the heat exchanger of the indoor unit serves as an evaporator, and the indoor air becomes cold by the heat of evaporation (when heating, it functions as a condenser and when cooling, it functions as an evaporator). The refrigerant gas from the heat exchanger (evaporator) of the indoor unit is collected into the accumulator through four directions and enters the refrigerant gas compressor. The cooling cycle operation is continued while repeating the above process.

However, the conventional GHP air conditioner having the configuration and operation conditions as described above can easily cool and heat the room, but since the heat exchange is continuously performed in an enclosed space, the oxygen concentration decreases and the air becomes cloudy. There is a risk of doing so. Of course, there may be opening and closing of some entrances and inhalation of air through the windows, but this is not a fundamental ventilation system, and the oxygen concentration in the air is lean and physiological and easy to clean due to normal human activities. It was difficult to maintain working environment.

In order to solve the above problem, it is possible to install a separate external air introduction device (ventilation device), but in this case, an expensive ventilation duct is required and still has the disadvantage that it cannot be installed at a limited ceiling height.

In order to solve this problem, an oxygen generator using PSA (Pressure Swing Absorption) method, which is used in an EHP type air conditioner, can be applied to a GHP method. A typical PSA oxygen generator is charged inside the device. The zeolite is used as a catalyst, and as the pressure applied to the zeolite increases, the affinity with nitrogen in the supplied air increases, so that the oxygen content is higher than that of general air during discharge. Compressed air discharged from the compressor is supplied to the zeolite to separate oxygen and nitrogen through the pressure decrease, and in this process, water in the air is also separated. In other words, the compressed air sucked into the zeolite generates oxygen through the process of water separation-nitrogen separation.

In addition, in the conventional oxygen generation system, a high temperature (about 100) is supplied using a heat exchanger such as a fan to solve the problem that the compressed air compressed in the compressor and supplied to the zeolite has a high temperature, thereby reducing the oxygen generation efficiency of the zeolite. The temperature of compressed air of ℃) is lowered to some extent. That is, the efficiency of the zeolite is because the higher the pressure and the lower the temperature of the air supplied is the lower the temperature.

Therefore, if the conventional oxygen generator is just applied to the GHP air conditioner, the complexity of the device configuration by having a separate water separation system in the oxygen generator, and also equipped with a heat exchanger such as a fan to lower the temperature of the compressed air The complexity of the device configuration to supply air to the zeolite in the state, and the air-cooled heat exchanger has a limit in lowering the temperature of the compressed air supplied to the zeolite in the state of high atmospheric temperature such as summer, and consequently the oxygen generator using the zeolite The problem is that efficiency is lowered.

An object of the present invention for solving the above problems is to supply oxygen to the room by installing a PSA-type oxygen generator in the GHP air conditioner, but does not have a separate water separation system in the oxygen generator to simplify the internal device configuration of the oxygen generator High heat exchange efficiency to increase oxygen concentration in the air generated from zeolite by supplying compressed air of lower temperature (below 30 ℃) to zeolite packed inside oxygen generator without using air-cooled heat exchanger such as fan. To provide a device having a.

The object of the present invention as described above is to allow the refrigerant pure environment path of the GHP air conditioner to be heat-exchanged by passing through the compressed air supply line of the oxygen generator installed in the GHP air conditioner, and the water in the compressed air supplied to the oxygen generator in advance at the front of the oxygen generator. It is achieved by providing a GHP air conditioner having an oxygen generator which is heat exchanged with a GHP refrigerant net environment furnace to be removed and supplied.

According to one aspect of the present invention, there is provided a branch refrigerant pipe branched on a refrigerant pipe returning to an outdoor unit after heat exchange in an indoor unit of a GHP air conditioner. An oxygen generator for supplying compressed air of the low temperature heat exchanged with the branched refrigerant pipe to the zeolite packed therein to supply air having increased purity of oxygen generated therefrom; It consists of a branch refrigerant pipe and a heat exchanger to heat exchange the oxygen generation period.

The branch refrigerant pipe is composed of a solenoid valve installed on the side where the refrigerant is introduced and a check valve installed on the side where the refrigerant heat exchanged in the heat exchange part is discharged, and the refrigerant pipe of the GHP air conditioner between the solenoid valve and the check valve of the branch refrigerant pipe. The solenoid valve is installed to configure the entire refrigerant to circulate the refrigerant pipe of the GHP air conditioner.

The branched refrigerant pipe is composed of a solenoid valve installed on the side where the refrigerant is introduced and a check valve installed on the side where the refrigerant exchanged in the heat exchange unit is discharged, and the side end at which the refrigerant in the branched refrigerant pipe is introduced is the refrigerant of the GHP air conditioner. The side end where the refrigerant in the branched refrigerant pipe is discharged after heat exchange is formed by inserting the refrigerant at the inside of the pipe at right angles to the side where the refrigerant flows in the refrigerant pipe of the GHP air conditioner. It is configured to use a portion of the refrigerant circulating through the refrigerant pipe.

The shape of the bent branch pipe is installed using the principle of Bernoulli flow rate.

The oxygen generator includes an oxygen generator main body consisting of a zeolite and a nitrogen (N) discharger is filled inside; A compressor for supplying compressed air to the oxygen-generating body through a compressed air supply pipe; It consists of a drain installed between the compressor and the rear end of the heat exchanger and the front of the oxygen-generating body.

The drain portion is installed in the upper part of the demister (Demister) and the compressed air that is raised in the compressed air supply pipe side of the heat exchanger portion located on the lower side of one side passes oxygen through this demister (Demister) installed oxygen other than the demister (Demister) It is configured to be supplied to the compressed air supply pipe toward the main body, and the inner lower portion is composed of a floating valve 232 and a discharge port installed below the floating valve, the height of which varies depending on the storage space and the storage water level.

Hereinafter, the configuration and the operation of the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall refrigerant system diagram of the cooling of the GHP air conditioner equipped with an oxygen generator according to an embodiment of the present invention, Figure 3 is a schematic configuration of the configuration of one embodiment of the present invention, Figure 4 is a cooling time of the embodiment of Figure 3 The flow chart shows the overall flow of refrigerant during cooling. To explain the overall flow of refrigerant during cooling, refrigerant from multiple compressors or any one selected compressor of an outdoor unit flows through an oil separator to an outdoor heat exchanger via a four-way valve. . After that, in the outdoor heat exchanger, the refrigerant is condensed and liquefied by the outside air and flows to the indoor unit. Since the refrigerant decompressed by the electronic expansion valve of the indoor unit is evaporated by heat exchange with the indoor air in the indoor heat exchanger, at this time has a refrigerant flow rate to lower the indoor air to the desired temperature.

The heat exchange configuration of the oxygen generator 2 installed on the refrigerant pipe 1 of the GHP air conditioner is as follows. First, the cooling time will be described. The refrigerant vaporized indoors is returned to the outdoor unit. At this time, the solenoid valve 13 'in the refrigerant pipe 1 of the GHP air conditioner is turned off, and the refrigerant pipe circulating the GHP air conditioner installed at the front end of the solenoid valve 13' ( 1) The solenoid valve 11 'of the branched refrigerant pipe 1' branched on is turned on so that the refrigerant is led to the branched refrigerant pipe 1 'and the heat exchanger 3 installed on the oxygen generator 2 so that the oxygen generator After heat exchange with the compressed air of (2), it flows through the check valve 12 'on the branch refrigerant pipe 1' to the refrigerant pipe 1 of the GHP air conditioner at the rear end of the solenoid valve 13 '.

In the heat exchange part 3, the compressed air of the high temperature (about 100 degrees) discharged from the compressor 22 of the oxygen generator 2 circulates in the room and heat exchanges with the returned refrigerant, whereby the temperature is lowered to about 30 ° C. or less. . The compressed air discharged from the compressor 22 generates condensed water after heat exchange, and the condensed water is discharged to the outside through the drain portion 23, and only low-temperature, high-pressure air is filled in the oxygen generating body 21 (PSA Bed). It is introduced into the zeolite 211. The low-temperature, high-pressure air supplied to the zeolite 211 of the oxygen generating base 21 is discharged to the outside through the nitrogen discharger 212 through the pressurization and depressurization of the zeolite 211, and the oxygen concentration is high. Only is fed indoors.

The oxygen generator is conveniently configured by using a space provided on one side of the case forming the exterior of the outdoor unit. In addition, the oxygen generated from the oxygen generator is supplied to the room through a pipe, such a pipe can be piped in large number depending on the number of indoor space.

FIG. 2 is an overall refrigerant system diagram when heating a GHP air conditioner equipped with an oxygen generator according to an embodiment of the present invention, FIG. 3 is a schematic diagram of a configuration of an embodiment of the present invention, and FIG. 5 is a heating diagram of the embodiment of FIG. 3. It is a schematic diagram showing the flow of refrigerant, and the refrigerant from the compressor is led to the indoor heat exchanger after passing through the oil separator and the four-way valve. At this time, the high-temperature refrigerant passing the four-way valve by turning on the solenoid valve (1) and turning off the solenoid valve (2) The oxygen generator flows into the indoor heat exchanger without passing through the heat exchange unit 3. In an indoor heat exchanger, the refrigerant releases heat inside the room and condenses and liquefies it. The refrigerant depressurized by the electronic expansion valve of the indoor unit is depressurized again by the liquid flow control valve (electronic expansion valve) and the capillary tube of the outdoor unit, and the refrigerant passing through the capillary tube is the outdoor heat exchanger. Flows to the plate heat exchanger. The outdoor heat exchanger absorbs heat from the outside air, and the plate heat exchanger absorbs and evaporates waste heat from the engine.

The refrigerant passing through the four-way valve through the outdoor heat exchanger and the refrigerant from the plate heat exchanger are combined and returned to the compressor through the accumulator.

In the above configuration, a separate heat exchange process is not required for the oxygen generator 2 as shown in FIG. 1 because the temperature of the outside air is low during heating.

Figure 6 is a schematic view showing a schematic installation configuration of another embodiment of the present invention, Figure 7 is a schematic diagram showing the refrigerant flow at the cooling of the embodiment 6, Figure 8 shows the refrigerant flow at the heating of Figure 6 embodiment It's a schematic,

1 to 5, the overall flow of the refrigerant or the heat exchange action is the same, only the refrigerant refrigerant heat exchanged in the solenoid valve (11 ') and the heat exchanger (3) installed on the side where the refrigerant refrigerant pipe 1' is introduced into the refrigerant discharged. It is composed of a check valve (12 ') installed on the side, the side end of the refrigerant flow in the branch refrigerant pipe (1') is formed by inserting the bent side toward the refrigerant flow inside the refrigerant pipe (1) of the GHP air conditioner. , The side end at which the refrigerant of the branched refrigerant pipe 1 'is discharged after heat exchange has only a different structure formed by inserting the refrigerant at the inside of the refrigerant pipe 1 of the GHP air conditioner at right angles to the side where the refrigerant flows. When installed in such a structure, the solenoid valve 13 'does not need to be installed in the refrigerant pipe 1 of the GHP air conditioner between the solenoid valve 11' and the check valve 12 'of the branch refrigerant pipe 1'.

9 is a detailed configuration of the drain portion of the present invention, the drain portion 23 is installed in the upper portion of the demister (Demister) is installed in the compressed air supply pipe 221 on the heat exchange portion 3 side heat exchanger 3 located on the lower side of the lower side Is passed through the demister to be supplied to the compressed air supply pipe 221 toward the oxygen generating body 21 installed on the other side higher than the demister. The floating valve 232 and the discharge port 233 installed in the lower portion of the floating valve is configured to vary according to.

The floating valve 232 is provided with a stopper means for blocking the outlet 233 in the lower portion. Such a closure means may be connected by a means such as a floating valve and a string, or may be connected by a means such as a stick. It is only necessary to have a closure means actuated in conjunction with the floating valve.

By such a configuration, the high temperature and high speed compressed air discharged from the compressor 22 of the oxygen generator 2 is reduced in temperature through the heat exchange unit 3. In this process, condensate is generated, and the mixed fluid of the dry air and the condensate is decelerated by moving to the point of "go" through the compressed air supply pipe 221, and the condensate is first separated from the mixed fluid, and the condensate not separated is demister At 231, the lower floating valve 232 is discharged to the outside by the outlet 233 of the bottom when the lower floating valve 232 is raised, and only the low-temperature dry air is sucked into the oxygen generating base body 21 (PSA BED). Therefore, since the condensate separation process is already pretreated in the previous stage in the oxygen generating body 21, the efficiency of the oxygen generator 2 is increased.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention returns the compressed air supplied from the compressor 22 constituting the oxygen generator 2 to the zeolite 211, which is charged inside the oxygen generating body 21 and installed in the GHP chamber, after heat exchange in a GHP indoor unit. Through the heat exchanger using all (or part of) the refrigerant on the refrigerant pipe (returned), the temperature of the compressed air is lowered (about 30 ° C. or lower), and the condensed water condensed through this process is sucked into the zeolite 211. By separating before the zeolite 211 to increase the efficiency of the generation of a higher purity oxygen than the existing oxygen generator is a useful invention having the advantage that can be supplied to the room is an invention that is expected to be used industrially greatly.

Claims (5)

A branch refrigerant pipe (1 ') branched on the refrigerant pipe (1) returning to the outdoor unit after heat exchange in the indoor unit of the GHP air conditioner; An oxygen generator (2) which supplies the compressed air of low temperature exchanged with the branched refrigerant pipe (1 ') to the zeolite (211) filled therein, and supplies the air with increased purity of oxygen generated therefrom to the room; A GHP air conditioner having an oxygen generator heat exchanged with a GHP refrigerant pipe, characterized in that the heat exchange portion (3) for heat exchange between the branch refrigerant pipe (1 ') and the oxygen generator (2). The method of claim 1, The branch refrigerant pipe 1 'is composed of a solenoid valve 11' installed at the side into which the refrigerant is introduced and a check valve 12 'installed at the side at which the refrigerant heat exchanged from the heat exchange unit 3 is discharged. A solenoid valve 13 'is installed in the refrigerant pipe 1 of the GHP air conditioner between the solenoid valve 11' and the check valve 12 'of the refrigerant pipe 1' to circulate the refrigerant pipe 1 of the GHP air conditioner. GHP air conditioner having an oxygen generator heat exchanged with the GHP refrigerant pipe, characterized in that configured to use the entire refrigerant to increase the oxygen generation efficiency. The method of claim 1, The branch refrigerant pipe (1 ') is composed of a solenoid valve installed on the side where the refrigerant is introduced and a check valve (12') installed on the side where the refrigerant heat exchanged in the heat exchange unit (3), branch refrigerant pipe (1 '). The side end where the refrigerant is introduced is bent into the refrigerant flow inside the refrigerant pipe (1) of the GHP air conditioner, and the side end where the refrigerant in the branch refrigerant pipe (1 ') is discharged after heat exchange is the GHP air conditioner. It is formed by inserting the refrigerant at right angles to the refrigerant flowing inside the refrigerant pipe 1 of the refrigerant pipe circulating the refrigerant pipe 1, characterized in that configured to use a portion of the refrigerant circulating refrigerant pipe 1 of the GHP refrigerant heat exchanger to generate oxygen efficiency GHP air conditioner having a high oxygen generator. The method of claim 1, The oxygen generator 2 includes an oxygen generator base body 21 composed of a zeolite 211 and a nitrogen discharger 212 filled therein; A conventional oxygen generator configuration comprising a compressor 22 for supplying compressed air to the oxygen generating base 21 through the compressed air supply pipe 221; GHP having an oxygen generator which heat exchanges with a GHP refrigerant pipe, which is composed of a drain portion 23 provided between the compressor 22, the heat exchange part 3, and the front end of the oxygen generating base 21. Air conditioner. The method of claim 4, wherein The drain portion 23 is provided with a demister 231 in the upper portion of the inside of the compressed air supply pipe 221, the compressed air supply pipe 221 side heat exchanger 3 located on the lower side of one side passes through the demister 231 Floating valve 232 is configured to be supplied to the compressed air supply pipe 221 toward the oxygen-producing base 21 side installed on the other side higher than the Mr. 231, the upper and lower heights vary depending on the space and the storage level of the condensate is stored in the lower part GHP air conditioner having an oxygen generator heat exchanged with the GHP refrigerant pipe, characterized in that consisting of a discharge port 233 is installed in the lower portion of the floating valve (232).

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