KR100295093B1 - Control method of diluting operation of absorption air conditioner - Google Patents

Abstract

PURPOSE: A control method of diluting operation of absorption air conditioner is provided to prevent reduction of crystallizations by executing diluting operation on stop of a heating and cooling device. CONSTITUTION: An operation stopping switch on an indoor unit(6) is pushed to stop a heating and cooling device after cooling operation. Gas electric valves(411,412,413) shut gas supplied to a burner(414) to extinguish fire of the burner. The heating and cooling device stops after a blast fan(415) for combustion, a water coolant cycle(102) and a solution pump(7) are continuously operated for about eight minutes while a heating switching valve(902) and a refrigerant supply valve(901) keep open to lower concentration of solution in a solution pipe and an absorber(2) to prevent crystallization of the solution.

Description

Dilution control method of absorption type air conditioner

1 is a schematic configuration diagram of an absorption type heating and cooling apparatus to which the present invention is applied.

2 is a flow chart for explaining the dilution operation state after the cooling operation of the method of the present invention.

Figure 3 is a flow chart for explaining the dilution operation state after heating operation of the present invention method.

<Description of the symbols for the main parts of the drawings>

1: Boiler 2: Absorber

3: evaporator 4: high temperature regenerator

5: low temperature regenerator 6: indoor unit

7: solution pump 8: condenser

9: flow control valve 10: cooling tower

11: body 701: solution heat exchanger

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a method for controlling dilution operation of an absorption type air conditioner using an aqueous solution such as lithium bromide as an absorption liquid.

[Prior art]

In general, an absorption type air conditioner using an aqueous solution such as lithium bromide as an absorption liquid is composed of a heating source and a regenerator for regenerating the absorption liquid and generating a refrigerant, and a solution pump for circulating the solution, an evaporator for evaporating the refrigerant, and an evaporator from the evaporator. Absorber that absorbs refrigerant vapor, Cold water circuit that discharges evaporative heat from the evaporator to introduce cold water cooled in the evaporation engine to the indoor unit and supplies cold air to the room, and a cooling tower that discharges the absorption heat absorbed by the absorber to the outside. Or a cooling device.

In order to reduce the size and efficiency of the above components, an outdoor heat exchanger, an absorber heat pipe, and a condenser heat pipe are connected in an annular order to circulate the cooling water with a cooling water pump, and the refrigerant in the low concentration absorption liquid is vaporized by a heating source. A low temperature regenerator which separates the medium absorbent liquid into a high concentration absorbent liquid and a vapor refrigerant, and a condenser heat transfer tube, a condenser and an evaporator heat pipe supplied with a high temperature steam refrigerant from each regenerator, and a liquefied refrigerant liquefied in the condenser An evaporator for evaporating under reduced pressure, an absorber installed in the evaporator and absorbing the vapor refrigerant evaporated from the evaporator to the high concentration absorbent liquid supplied from the low temperature regenerator, and the low concentration absorbent liquid in the absorber to the high temperature regenerator. To return the solution pump An outdoor unit having an absorption circuit, a cold water pump for flowing cold water through the evaporator heat pipe, an outdoor controller for controlling the cooling water pump, the heating source, and the cooling water pump, a blower fan, and a vertical type of the evaporator. The furnace consists of a high temperature regenerator, a low temperature regenerator, an absorber, and an evaporator in order, and a condenser connected to the coolant circuit of the absorber in the upper part, and a burner part and a dome type boiling heater installed in the lower part of the high temperature regenerator. The evaporator is installed separately from the main body, and the circular evaporator heat pipe is installed horizontally from the top to the bottom, and the refrigerant flowing from the condenser flows into the upper part of the evaporator heat pipe, and the refrigerant flows from the top to the bottom of the evaporator heat pipe in the downward direction. The refrigerant evaporated from the evaporator heat pipe by The room is connected was provided to be absorbed enters the absorber.

The small absorption type air conditioner is a configuration that does not have to provide a cold / hot water circuit necessary for installing a conventional indoor unit, and furthermore, the air conditioner having a smaller body size.

[Problem to Solve Invention]

The absorption type air conditioner minimizes unnecessary space, and the size of the main body is small so that the device does not require a cold / hot water circulation circuit and a cold / hot water pump according to the indoor unit installed in the small sized absorption type air conditioner for the studio, especially in the home.

According to the present invention, in the method of operating the absorption type air conditioner, when the apparatus is stopped immediately after the cooling operation or the heating operation, if all the apparatuses including the burner are stopped, the regeneration is continuously performed because the high temperature regenerator maintains a high temperature state. It is an object of the present invention to provide a method for controlling the dilution operation of an absorption type air conditioner which prevents the problem of crystal precipitation by performing the dilution operation when the cooling and heating equipment is stopped because the solution in the solution pipe including the high temperature regenerator, the low temperature regenerator, and the absorber may crystallize. .

[Means for solving the problem]

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention employ | adopted the following structures.

(1) a high temperature regenerator (4) for vaporizing a refrigerant in a low concentration absorption liquid by a heating source during a cooling operation to separate the medium concentration absorption liquid and a vapor refrigerant; A low temperature regenerator (5) containing the high temperature regenerator (4) and separating the medium absorbent liquid into a high concentration absorbent liquid and a vapor refrigerant; An absorber (2) containing the low temperature regenerator (5) and supplied with a high concentration absorbent liquid separated from the low temperature regenerator by a tray device to absorb the refrigerant vaporized in the evaporator (3); The heat exchanger tube containing the absorber 2 is connected to the annular evaporator to introduce refrigerant vapor generated from the high temperature regenerator 4 and the low temperature regenerator 5 into the condenser 8 to condense the refrigerant condensed in the condenser. E) an evaporator (3) for forming a liquid film in the evaporator heat pipe to smooth the evaporation of the refrigerant through a tray on the heat pipe; A main body (11) having a condenser (8) condensing the refrigerant supplied from the low temperature regenerator (5) at the top and having an annular condensation coil on the evaporator (3); The evaporator 3 for receiving and evaporating the refrigerant condensed in the condenser 8 is separated from the main body 11 and installed in parallel.

The evaporator (3) is configured such that the refrigerant condensed in the condenser (8) flows into the evaporator tube (301) placed horizontally in the evaporator (3) above the evaporator and sequentially flows into the evaporator tube in the downward direction. 301 has a circular tube shape, and has a structure having a plate-shaped external heat dissipation fin 302. The inside of the evaporator (3) is connected to the inside of the absorber (2) by the pipe so that the vapor evaporated from the evaporator (3) has a structure that is absorbed into the absorbent in a high concentration of absorber.

The evaporator (3) flows air in the room by the blowing fan (303), passes through the fin of the evaporator (3) cooled by cold water flowing in the evaporator (3) heat pipe (301), and introduces cold air into the room. And cooling is carried out.

When the operation stop switch in the indoor unit 6 is pressed to stop the cooling operation, the gas supplied to the burner 414 is extinguished while the gas solenoid valves 411-413 are closed. However, the combustion blower fan 415, the cooling water circuit 102, and the solution pump 7 continue to operate for about 8 minutes, and at the same time, the heating switching valve 902 and the refrigerant supply valve 901 are kept open, To stop.

Continuous operation of the combustion blower fan 415 is for quickly cooling the heating part of the high temperature regenerator 4 and eliminating waste gas remaining, and continuing to operate the cooling water circuit 102 is for rapidly cooling the absorber 2. The reason why the refrigerant supply valve 901 and the heating switching valve 902 are opened and the solution pump 7 continues to operate is because the absorber 2 has a low concentration solution and refrigerant in the condenser 8 and the evaporator 3. By introducing into the high temperature regenerator (4) to lower the solution concentration in the high temperature regenerator and to lower the solution concentration in the low temperature regenerator (5), the solution tube and the absorber (2) to prevent the determination of the solution.

(2) During the heating operation, the heating switching valve 902 installed at the inlet of the solution pipe to the low temperature regenerator 5 via the heat exchanger 701 under the high temperature regenerator 4 is closed, and the inside of the high temperature regenerator 4 is closed. The high temperature steam generated in the inflow into the evaporator (3) to introduce the indoor air to the heat exchange fin installed outside the evaporator to supply the room again to the heating to be carried out.

When stopping the heating operation, press the operation stop switch in the indoor unit 6 as in the case of stopping the cooling operation, the gas supplied to the burner 414 closes the gas solenoid valves 411-413, and the burner is extinguished. However, the combustion blowing fan 415, the indoor unit 6 circulation fan, and the solution pump 7 continue to operate for about 5 minutes and at the same time, the heating switching valve 902 is kept closed and the refrigerant supply valve 901 is forced. Keep the air conditioner open and stop the air conditioner.

The continuous operation of the combustion blower fan 415 is for quickly cooling the heating part of the high temperature regenerator 4 and eliminating waste gas remaining, and continuing to operate the indoor unit 6 circulation fan for rapidly cooling the evaporator 3. The reason for opening the refrigerant supply valve and continuing the operation of the solution pump 7 is that the concentration of the low concentration solution and the refrigerant in the condenser 8 and the evaporator 3 are introduced into the high temperature regenerator 4 in the absorber 2 and the concentration is increased. The solution concentration in the high temperature regenerator is lowered to prevent crystal precipitation of the solution.

[Action]

[Claim 1]

The rare solvent in the boiling unit 1 under the high temperature regenerator 4 heated from the gas burner 414 which is a heating source under the absorption air conditioner main body 11 boils to generate steam refrigerant, and in the high temperature regenerator 4 The concentrated medium concentration solution is sprayed to the outside of the refrigerant vapor separator (501) surrounding the high temperature regenerator (4) to the outside via the solution heat exchanger (701), the outside of the refrigerant vapor separator is heated by a high temperature refrigerant vapor The refrigerant is regenerated by the heat source again to become a high concentration solution, flowed into the absorber 2 having the annular absorbing coil 201 and sprayed outside the absorber coil, and the refrigerant evaporated in the evaporator 3 forms a liquid film outside the coil of the absorber 2. After being absorbed by the constituent high concentration absorbent liquid, it becomes a rare solution and collects in the lower part of the absorber 2.

The collected rare solution is introduced into the boiler 1 again through the solution heat exchanger 701 by a solution pump 7 connected to the lower part of the absorber 2 to have an absorption solution regeneration cycle.

The high temperature refrigerant vapor vaporized by the high temperature regenerator (4) is condensed by the cooling water flowing into the condenser (8) consisting of an annular coil and flowing into the condenser coil, and the refrigerant vapor generated in the low temperature regenerator (5) The condenser 8 flows into the low temperature regenerator 5 and the condenser 8 which is open.

The refrigerant condensed in the condenser 8 is stored in the refrigerant reservoir 801 under the condenser, and the refrigerant in the refrigerant reservoir is transferred to the evaporator 301 heat pipe installed separately from the main body 11 by the refrigerant supply valve 901. The evaporated refrigerant flows under low pressure in the evaporator heat pipe opened inside the evaporator 3, and the evaporated refrigerant is introduced into the absorber 2 through a tube connected to the evaporator 3 and absorbed by the high concentration solution sprayed outside the absorber coil.

The evaporator (3) heat pipe is cooled by evaporation, the air introduced from the indoor unit (6) by the blower fan (303) hits the plate-shaped heat exchange fins 302 installed outside the evaporator heat pipe, the cold air is indoors To cool the room.

When the operation stop switch in the indoor unit 6 is pressed to stop the cooling operation, the gas supplied to the burner is closed while the gas solenoid valves 411-413 are closed.

However, the combustion blower fan 415 and the cooling water circuit 102 and the solution pump 7 are continuously operated for about 8 minutes, and at the same time, the heating switching valve 902 and the refrigerant supply valve 901 are kept open and the air conditioner To stop.

At this time, the operation of the combustion blower fan 415 is for cooling the heating part of the high temperature regenerator 4 and eliminating the waste gas remaining, and for continuously operating the cooling water circuit 102 to cool the evaporator 3 quickly. The reason why the cooled refrigerant flows into the high temperature regenerator (4) makes the cooling faster, opens the refrigerant supply valve (901), and keeps the solution pump (7) running. The low concentration solution and the condenser (8) in the absorber (2), The refrigerant in the evaporator (3) is introduced into the high temperature regenerator (4) to dilute the solution in the high temperature regenerator to lower the concentration to prevent crystal precipitation of the solution.

[Effects of the Invention]

[Claim 1]

Regeneration is continued by the heat of the high temperature regenerator after cooling operation, and the concentration of the solution increases in the solution pipe including the high temperature regenerator (4), the low temperature regenerator (5), and the absorber (2), thereby preventing the risk of precipitation of the crystal in advance. have.

In addition, by appropriate dilution operation, the concentration of the high temperature regenerator (4), the low temperature regenerator (5), and the absorber (2) is somewhat different, thereby reducing the starting time of starting operation.

[Claim 2]

When the absorption air conditioner is stopped after the heating operation, there is a risk of the same crystal precipitation as the above-mentioned cooling operation. Therefore, unlike the prior art, the solution is not heated by the solution but by the vapor of the refrigerant. Since only the solution in the high temperature regenerator 4 needs to be diluted during the dilution operation without moving to the heat exchanger 701, the low temperature regenerator 5, and the absorber 2, the dilution operation time is shortened.

Embodiment of the Invention

The evaporator 3 has a vertical structure including a high temperature regenerator 4, a steam refrigerant separator 501, a low temperature regenerator 5, and an absorber 2, and a condenser 8 at the top and a heating part at the bottom. It is installed separately from the absorption air conditioner main body 11, and the evaporator 3 is configured to install a plurality of circular horizontal evaporator heat pipes from the top to the bottom, and to be opened inside the evaporator 3, and the heat pipe outside the evaporator (3) Is composed of a plate-shaped heat exchanger fin, the indoor air is introduced into the blower fan, the heat exchanged air is introduced into the room through heat exchange with the evaporator (3) heat pipes to separate the indoor unit (6) and cold water circuit In the absorptive heating and cooling system that is not necessary, when the air conditioner is stopped after the cooling operation as shown in FIG. 2, when the operation stop switch on the indoor unit 6 is pressed, the gas supplied to the burner is extinguished and burned by the gas supply valves 411-413. The blower fan 415 (and the coolant circuit 102 and the solution pump 7) is continuously operated for about 8 minutes and at the same time, the heating switching valve and the refrigerant supply valve are kept open to carry out the dilution operation, thereby rapidly increasing the temperature of the main body. While cooling, the solution concentration in the solution tube and the absorber is lowered to prevent the determination of the solution, and a heating / heating switching valve is installed in the pipe connected to the solution heat exchanger in the high temperature regenerator without installing a separate heating tube in the air conditioner. By closing the switching valve to prevent the solution from entering the solution heat exchanger, the heated refrigerant vapor is separated from the solution refrigerant separator and flows into the condenser, and the hot steam flows into the evaporator through the refrigerant supply pipe and blows the air from the stream. The heating operation is performed by introducing the air heated in the indoor unit through the heat exchange with the evaporator by the fan. In absorption type air conditioner, when stopping the air conditioner after heating operation as shown in the third diagram, if the operation stop switch in the indoor unit is pressed, the gas supplied to the burner is extinguished by the gas supply valve and the combustion blower fan, the indoor air circulation fan and the solution pump Continue to operate for about 5 minutes and at the same time, the heating switching valve is closed and the refrigerant supply valve is kept in the same state as in operation, and then the air conditioner is stopped to cool down each part of the absorption air conditioner while lowering the solution concentration of the high temperature regenerator. To prevent the determination of the system and to stop the operation of all absorption air conditioners.

Claims (2)

A vertical structure including the high temperature regenerator (4), the steam refrigerant separator (501), the low temperature regenerator (5), and the absorber (2); It is installed separately from the absorption type air conditioner main body 11 having a condenser 8 at the top and a heating part at the bottom, and the evaporator 3 is provided with a plurality of circular horizontal evaporator heat pipes from the top to the bottom, and inside the evaporator 3. It is configured to open, the evaporator (3) the outside of the heat pipe is composed of a structure having a plate-shaped heat exchange fin, the air is heat exchanged through the heat exchange with the evaporator (3) heat pipe by introducing the indoor air into the blowing fan (303) In the absorption type air-conditioning apparatus which does not need a separate indoor unit 6 and a cold water circuit by introducing the gas into the room, when the air-conditioner is stopped after the cooling operation, the gas supplied to the burner is gaseous by pressing the operation stop switch on the indoor unit 6. The burner 414 is extinguished with the valves 411-413, and the combustion blower fan 415, the cooling water circuit 102, and the solution pump 7 are continuously operated for about 8 minutes, and at the same time, the heating switching valve 902 andSheet supply valve 901 of the absorption Cooling & Heating then remains open to the Cooling & Heating stopped by lowering the solution concentration of the solution tube and the absorption-flight, characterized in that to prevent the determination of the solution was diluted with operation control method. Without installing a separate heating tube in the air conditioning system, the heating / cooling switching valve 902 is installed in the pipe connected from the high temperature regenerator 4 to the solution heat exchanger 701, and the heating / cooling switching valve 902 is closed during heating operation. The refrigerant vapor heated by preventing the solution from flowing into the solution heat exchanger 701 is separated from the solution refrigerant separator and flows into the condenser 8, and the hot steam flows into the evaporator 3 through the refrigerant supply pipe and enters the room. In an absorption type air conditioner in which a heated air is introduced into an indoor unit 6 through heat exchange with an evaporator 3 by a blower fan 303 to perform a heating operation, when the air conditioner is stopped after heating operation. When the operation stop switch in the indoor unit 6 is pressed, the gas supplied to the burner 414 is extinguished by the gas solenoid valves 414-413, and the combustion blower fan 415 and the indoor unit 6 circulation fan and the solution pump are burned. Continue to (7) for about 5 minutes At the same time, the heating switching valve 902 is closed and the refrigerant supply valve 901 maintains the same open state as in operation, and then stops the air conditioner to lower the solution concentration, characterized in that to prevent the precipitation of the solution. Dilution operation control method of the absorption air-conditioner.