JP2862614B2 - Bleed exhaust system for air-cooling absorption air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bleed / exhaust device for an air-cooling absorption air conditioner for an air conditioner, which uses water as a refrigerant and an aqueous solution of lithium bromide as an absorbent. In addition, in an air-cooling absorption air-conditioner of a type in which a liquid refrigerant is directly circulated to an indoor unit, particularly, to an air-extraction air-exhaust device of an air-cooling absorption air-conditioner suitable for maintaining high performance by improving the non-condensable gas extraction in the device. It is.

[Prior Art] Conventionally, non-condensable gas discharging means from an absorption cooling / heating machine is configured to condense or liquefy a refrigerant vapor or absorb it into an absorbent so as to prevent the liquid refrigerant in the device from being discharged outside the system as much as possible. After collecting the non-condensable gas, it was discharged out of the system by the following exhaust means.

. Method using a mechanical vacuum pump.

. A method in which the bleeding tank is filled with the solution discharged from the solution circulation pump, and the non-condensable gas is compressed to an atmospheric pressure or higher and exhausted.

. A method of evacuating using the hydrogen permeability of a palladium cell.

For example, Japanese Patent Application Laid-Open No. 1-179873 discloses a device in which a palladium cell heated by an electric heater is provided above a gas storage chamber for separating and discharging hydrogen gas.

. A method in which non-condensable gas is sucked and exhausted by a water ejector that uses cooling water as driving water.

For example, Japanese Patent Application Laid-Open No. 57-136076 discloses that a liquid ejector communicating with a non-condensable gas collecting section in a body is provided in a bleed chamber of an bleed device, and a liquid in a liquid storage tank of the bleed device is supplied to the ejector. A pump with a pump is disclosed. The liquid is composed of a refrigerant and an additive, and is configured to be cooled by a cooler connected to a cooling water pipe.

In Japanese Utility Model Publication No. 57-49103, non-condensable gas is collected in a bleeding tank and flows down to a separator in a gas-liquid mixed state.
There has been disclosed a technique in which gas-liquid separation is performed by this separator, and the separated non-condensable gas is removed to the outside together with the cooling water by an ejector action of the cooling water.

[Problems to be Solved by the Invention] In the above-described conventional technology, the following points have not been considered.

The mechanical vacuum pump method requires periodic oil exchange or maintenance because of the fact that water as a refrigerant corrodes and degrades equipment, and the sealing oil contains water, which lowers the degree of vacuum. there were.

The method of evacuating using the liquid pressure of the solution circulation pump requires a large-volume gas storage tank to compress the gas collected at low pressure to above atmospheric pressure. Therefore, it was necessary to make the excess solution stay on the cycle side.

Although the palladium cell exhaust method is effective for discharging hydrogen gas, it is not possible to discharge air such as nitrogen gas or oxygen gas leaked into the machine, so it is necessary to bring a mechanical vacuum pump for maintenance as well. there were.

The method of exhausting with a water ejector using cooling water as a driving water is widely used because there are no mechanical moving parts and it is small, but cold water and cooling water are frequently discharged, so replenishment is required A large amount of water was required, and it was necessary to lay water supply and drain pipes even on models that originally do not use cooling water, such as air-cooled absorption air conditioners.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the related art, and has as its object to provide an air extraction / exhaust device of an air-cooling absorption air conditioner that enables automatic air extraction and exhaust without the need for a water supply / drain pipe. is there.

[Means for Solving the Problems] In order to achieve the above object, a configuration of a bleeding exhaust device of an air-cooling absorption air conditioner according to the present invention includes a regenerator, an air-cooled condenser,
In an air-cooling absorption cooling and heating machine comprising an evaporator, an air-cooling absorber, a solution heat exchanger, a solution pump, a refrigerant pump, and a piping system operatively connecting these, an air storage tank and non-condensable gas in the machine are stored in the air storage tank. Extraction means for extracting and collecting air in the tank, means for detecting the amount of non-condensable gas retained in the air storage tank, the air storage tank, and a water ejector connected via an electromagnetic valve and a check valve, A gas-liquid separator located on the outlet side of the water ejector, means for circulating water from the gas-liquid separator to the water ejector, and means for cooling the driving water for the water ejector are provided.

[Operation] The operation of the above technical means is as follows.

The amount of non-condensable gas collected in the gas storage tank is the amount of non-condensable gas that has accumulated (the amount of non-condensable gas collected, such as a pressure switch, a gas concentration switch using heat transfer, or a float switch that detects the liquid level at the liquid seal height) ) The detection means detects that sufficient non-condensable gas has been collected in the gas storage tank and outputs a signal.

Upon receiving this signal, the water pump connected to the gas-liquid separator is operated, and the water ejector driving water is circulated.

This driving water is cooled by, for example, the liquid refrigerant of the evaporator and becomes low in temperature, and when a predetermined time has elapsed, when an electromagnetic valve provided in a pipe connecting the air storage tank and the water ejector is opened, the air is stored. If the water ejector suction pressure is lower than the tank pressure, the non-condensable gas in the storage tank is sucked into the water ejector via the check valve and sent to the gas-liquid separator, and the exhaust operation starts.

The water containing the non-condensable gas is slowed down in the gas-liquid separator to separate light gas bubbles at the top. The separated gas is released from the exhaust pipe to the atmosphere.

On the other hand, the water from which the gas has been separated is again supplied to the water ejector by the water pump. When the evacuation operation is performed for a predetermined time in this manner, the electromagnetic valve is closed and the water pump is stopped.

Only during this operation, the cooling capacity is used for cooling the water ejector driving water, resulting in heat loss, but there is no heat loss when the exhaust operation is not performed. The water ejector is also called an aspirator, and has a vacuum reaching pressure up to a pressure close to the saturated steam pressure of the driving water temperature. Therefore, the lower the driving water temperature is, the higher the exhaust speed is, and the lower the pressure of the storage tank can be. The gas storage tank does not need to store gas until the pressure becomes high, and has an advantage that the system can be simplified. In addition, since the gas is not exhausted until the pressure becomes very low, the exhaust operation is terminated when the partial pressure of the non-condensable gas is higher than the partial pressure of the refrigerant vapor, so that the amount of exhausting the refrigerant is small, and maintenance such as additional refrigerant is not required. is there.

That is, the pressure of the air tank Is the refrigerant vapor partial pressure Non-condensing gas partial pressure Is the sum of

If so, the discharge of the refrigerant in the machine is small, and maintenance such as addition of the refrigerant is unnecessary.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

First, FIG. 1 is a cycle system diagram of an air-cooling absorption cooling and heating machine according to one embodiment of the present invention.

An air-cooling absorption example air conditioner shown in FIG.
Low-temperature regenerator 2, air-cooled condenser (hereinafter simply referred to as condenser)
3, evaporator 4, air-cooled absorber (hereinafter simply referred to as absorber)
5, a low-temperature heat exchanger 6 relating to the solution heat exchanger 6, a high-temperature heat exchanger 7, a solution circulation pump (hereinafter simply referred to as a solution pump) 8,
It comprises a water heater 9, an indoor unit 10, and a piping system operatively connecting them, and includes a cooling fan 13 for supplying cooling air to the condenser 3 and the absorber 5 in a thick arrow direction.

The absorber 5 and the condenser 3 are formed in a spiral groove (not shown).
Is formed in a pipe, and is constituted by a plurality of vertical pipes 11 provided with a number of horizontal fins 12 outside the pipe.

The absorber 5 has a plurality of vertical pipe flow paths (hereinafter, referred to as paths) in which a plurality (three in FIG. 1) of the vertical pipes 11 are arranged in parallel along the flow direction of the cooling air. . The absorber 5 has three spray pumps 14 (collectively 14a to 14c), a first spray pump 14a in a first pass, and a second spray pump 14a in a second pass.
The spray pump 14b and the third spray pump 14c in the third pass are connected to the lower header 15 (collectively, 15a to 15c). The lower header 15 includes the lower header 15a of the first pass,
It is divided into a lower header 15b of the pass and a lower header 15c of the third pass. Sprayers 16a, 16b, 16 above the vertical pipe of each pass
The upper part of each path is connected to the refrigerant vapor duct 17 from the evaporator 4.

The condenser 3 is disposed in the middle of the third pass of the absorber 5 with respect to the second pass, and the upper part of the condenser 3 is connected to the refrigerant vapor supply duct 18 from the low-temperature regenerator 2, The lower header 19 of 3 is connected to the evaporator 4 via a refrigerant pump 20.

 Next, the operation of the cycle will be described.

 First, the cooling cycle will be described.

The low-temperature liquid refrigerant of the evaporator 4 is supplied to a refrigerant circulation pump 21 and a check valve.
The refrigerant is sent to the indoor unit 10 via the refrigerant conduit 23 having the cooling medium 22, is supplied to the cooling unit, is heated, and is again dispersed in the evaporator 4 via the second gas-liquid separator 51, and a part of the refrigerant is supplied. Evaporates into a low-temperature liquid refrigerant.

The refrigerant vapor is absorbed by the solution in the absorber 5, and the heat of absorption at that time is cooled via the air-cooled fins 12. The solution which has absorbed the refrigerant vapor and has become thinner is sent to the high-temperature regenerator 1 and the low-temperature regenerator 2 where it is heated, generates refrigerant vapor, becomes a thick solution, and returns to the absorber 5 again.

The refrigerant vapor generated in the high-temperature regenerator 1 is condensed and liquefied in the heating tube of the low-temperature regenerator 2, and the heat of condensation at that time is used as a heating heat source of the low-temperature regenerator 2. The liquefied refrigerant is sent to the condenser 3. Further, the refrigerant vapor generated in the low-temperature regenerator 2 is sent to the condenser 3 through the refrigerant vapor supply duct 18 and is cooled by the cooling air to be condensed and liquefied. These liquid refrigerants are sent to the evaporator 4 by the refrigerant pump 20. The cooling cycle is configured as described above.

 Next, the heating cycle will be described.

The steam generated by the high-temperature regenerator 1 is led to the water heater 9 and the indoor unit 10
Is directly condensed with the refrigerant returned from the heater and heated, and the high-temperature liquid refrigerant is sent to the indoor unit 10 by the refrigerant pump 24 through the warm refrigerant pipe 25 for heating or reheating after dehumidification.

When the refrigerant liquid level of the water heater 9 becomes higher than a predetermined level, the refrigerant is returned to the high temperature regenerator 1 via the U-shaped seal 26.

Since the heating refrigerant is released to the gas phase even though it is in a closed circulation cycle, there is no need for a cistern (liquid tank), a bladder for adjusting the liquid pressure due to temperature fluctuations, and make-up water in this warm refrigerant circulation system. , The system is very simple. Therefore, there is an advantage that the reliability is high.

Next, the automatic bleeding exhaust system (device) will be described. In the present embodiment, this system includes an automatic bleeding system and an exhaust device, and is classified as follows.

1) Automatic bleeding system This is an air storage tank that collects non-condensable gas from the cycle.
It is a system that stores 30.

The location of the bleeding from the cycle to the air storage tank 30 is the location where the flow of the refrigerant vapor is blocked in the equipment, where the partial pressure of the non-condensable gas is the highest and the bleeding can be performed efficiently.

Bleeding element devices and bleeding methods can be classified as follows.

i) High pressure bleeding High pressure bleeding of the gas phase part of the high temperature regenerator 1. The bleeding point is bleeding from the refrigerant outlet of the refrigerant vapor condensing part of the low-temperature regenerator 2.

In this embodiment, the non-condensable gas on the high pressure side is mixed into the liquid refrigerant conduit 27 flowing out to the condenser 3 and the gas is extracted to the condenser 3.

ii) Water heater extraction Air extraction from the water heater 9. In the present embodiment, no special bleeding means is taken for high-pressure bleeding.

iii) Medium pressure bleeding Bleeding from the condenser 3. In the present embodiment, the gas phase of the lower header 19 and the gas phase of the air storage tank 30 are connected by a bleed pipe 32 having an orifice 31.

iv) Low pressure bleeding Bleeding from the absorber 5. In the present embodiment, the lower header 15a,
15b, 15c are connected to the low-pressure bleeding tank 34 by bleeding pipes 33a, 33b, 33c, and bleeding is performed. The low-pressure extraction tank 34 and the storage tank 30
A non-condensable gas is sent to the gas storage tank 30 by a reverse bubble pump operation, which is connected by a gas-liquid conduit 35 having a liquid seal portion 39.

v) Indoor unit system bleeding Indoor unit 10, refrigerant conduit 23 for circulating low-temperature liquid refrigerant piping system,
And bleeding from the warm refrigerant pipe 25 related to the circulation warm refrigerant pipe system.

In the present embodiment, a second gas-liquid separator 51 is provided near the inlet of the evaporator 4 in the refrigerant conduit 23, and the upper part thereof is connected to the gas storage tank 30 via an electromagnetic valve 52.

The gas-liquid separator 51 is provided with a float switch 53 as means for detecting the amount of non-condensable gas staying (gas collection detecting means).

A similar device is not shown in the drawing and can be disposed also in the warm refrigerant pipe 25. If the liquid level of the gas-liquid separator 51 drops while the refrigerant pump 21 is operating, it can be determined that the non-condensable gas has accumulated, and the solenoid valve 52 is opened to exhaust the gas into the gas storage tank 30. Thus, the non-condensable gas in the indoor unit 10 and the refrigerant conduit 23 can be extracted. A few seconds after receiving the signal from the float switch 53 is sufficient for the opening time of the solenoid valve 52. If this is frequent, there is a leak in the piping system.

Medium pressure bleed, low pressure bleed,
The indoor unit extraction will be described below.

 First, the low pressure bleeding of the present embodiment will be described.

Piping 28 on the upper side of low pressure bleeding tank 34 and on the discharge side of solution pump 8
Is communicated with the branch pipe 36. Branch pipe 36 is a cooler
37 is provided and is cooled by cooling air, the vapor pressure of the solution is made lower than that of the evaporator 4, and the refrigerant vapor is passed from the lower header 15a, 15b, 15c of the absorber 5 through the bleed pipes 33a, 33b, 33c. At the same time, the non-condensable gas is collected in the low-pressure bleeding tank. A third gas-liquid separator 38 is provided at a branch point between the pipe 28 and the branch pipe 36, and the branch pipe 36 is configured to take out liquid from a lower part of the gas-liquid separation pipe 38, A solution containing a small amount of non-condensable gas bubbles in the solution sent by the jet is sent to 34. A gas-liquid conduit 35 is connected to the lower part of the low-pressure bleeding tank 34, and the non-condensable gas is taken into the solution as bubbles by the liquid flow. Note that a part of the refrigerant vapor is absorbed by the solution. The gas-liquid conduit 35 forms a U-shaped liquid seal portion 39, and separates the non-condensable gas bubbles that the solution gently flows out and takes in in the gas storage tank 30.

The U-shaped liquid seal portion 39 is a means for maintaining the pressure difference between the absorber 5 and the gas storage tank 30, and is trapped by the absorber 5 in the gas storage tank 30 even if the exhaust operation is not performed from the gas storage tank 30. Since the collected non-condensable gas does not flow out, the partial pressure of the non-condensable gas in the absorber 5 can be constantly reduced, and there is an effect of improving the absorption heat transfer.

 Thus, low-pressure bleeding is performed.

 Next, supplementary explanation of medium pressure bleeding will be given.

The solution flowing into the gas storage tank 30 from the low-pressure bleeding tank 34 has a vapor pressure lower than that of the absorber and still has a sufficient absorption capacity. The refrigerant vapor extracted from the condenser 3 is absorbed by the solution having a low refrigerant vapor pressure. Therefore, the partial pressure of the refrigerant vapor in the air storage tank 30 can be kept low. A float switch 40 is provided below the gas storage tank 30 as means for detecting the amount of non-condensable gas retained in the gas storage tank 30.

The solution that has flowed into the gas storage tank 30 from the lower part of the gas storage tank 30 via the inverted U-shaped liquid seal part 41 and the solution return pipe 42 returns to the suction of the solution pump 8. If the liquid seal height of the inverted U-shaped liquid seal part 41 is set slightly lower than the liquid seal height of the U-shaped liquid seal part 39, the gas-liquid contact of the solution flowing into the gas storage tank 30 can be performed well. The liquid seal height of the inverted U-shaped liquid seal part 41 is approximately
About 400 mm is good, and lithium bromide-water system has the ability to collect non-condensable gas up to a pressure of about 50 mmHg (6 kPa). The storage tank 30 may be evacuated under conditions lower than this pressure.

Note that, even at this pressure, if the condensation temperature of the air-cooled condenser 3 is higher than 38 ° C., the condition is lower than the internal operating pressure, and the air can be extracted from the condenser 3 into the air storage tank 30.

2) Exhaust device This is a system for discharging the non-condensable gas collected in the air storage tank 30 to the outside of the machine.

First, the configuration of the exhaust device according to the present embodiment will be described.

An exhaust device is connected to an outlet of the water ejector 48 by a water ejector (also referred to as an aspirator) 48 connected to the air storage tank 30 by an exhaust pipe 47 via a manual valve 44, an electromagnetic valve 45, and a check valve 46. A gas-liquid conduit 49, a first gas-liquid separator 50 located below the water ejector 48, a water pump 54 connected to the gas-liquid separator 50, a water conduit 55, and a cooler 56. The air tank 30 is provided with a float switch 40 of a non-condensable gas retention amount (gas storage amount) detecting means.

From the lower part of the gas-liquid separator 50, the water is exchanged with low-temperature liquid refrigerant by a water pump 54 through a water conduit 55 in a cooler 56 provided in the second gas-liquid separator 51 to become low-temperature water. After that, the water is supplied to the water ejector 48.

The evacuation operation is limited to the cooling operation. The water pump 54 is first operated by the evacuation signal of the float switch 40 of the air storage tank 30, then the solenoid valve 45 is opened, and the air is discharged by the suction action of the water ejector 48. The non-condensable gas collected in the tank 30 is discharged to the gas-liquid separator 50, gas bubbles are separated at the top, and the check valve
It is exhausted from the exhaust pipe having 57. At this time, the driving water of the water ejector is cooled only during the evacuation operation, and at all other times, there is no heat loss at all. Also,
There is no need to keep the gas-liquid separator 50 cool, so that there is an advantage that the device can be made compact.

Further, the partial pressure of water vapor in the gas storage tank 30 is substantially the same as the solution at the outlet of the absorber 5 and can be made extremely low, so that there is an effect that the discharge of water in the evacuation operation is extremely small.

According to the present embodiment, the bleeding means of the absorber 5 on the low pressure side;
A water pump 54 and a gas-liquid separator 50, which have an extraction means for the condenser 3 on the high pressure side and discharge the non-condensable gas collected in the gas storage tank 30.
And a water ejector 48, a cooler 56 related to a driving water cooling means,
Since the automatic exhaust system including the float switch 40 according to the non-condensable gas stagnation detection means of the air storage tank 30 is provided, an automatic bleeding operation that does not require a water supply / drain pipe, an effect of realizing an air-cooling absorption air conditioner equipped with an exhaust system can be achieved. is there.

Next, another embodiment (second embodiment) of the present invention will be described with reference to FIG.

FIG. 2 is a system diagram of a main part of an air-cooling absorption air conditioner according to another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts, and a description thereof will be omitted.

The difference between the embodiment of FIG. 2 and the embodiment of FIG. 1 is as follows.

1) The branch pipe 36 on the discharge side of the solution pump 8 connected to the absorber 5 (lower header 15b, 15c) is divided into two, and one conduit 36a is connected to the cooler 37, and the other conduit 36b is connected to the gas storage tank 30A. Connected.

The solution that has passed through the cooler 37 is passed through a conduit 36a to a liquid refrigerant heat exchanger 59.
Is supplied to the low-pressure bleeding tank 34 via the In addition, storage tank 30
The solution sent to A by the conduit 36b is scattered on the filling portion 61 so that the air vapor storage tank 30 absorbs the refrigerant vapor in A.

With this configuration, there is an effect that the refrigerant vapor can be efficiently recovered in the air storage tank 30A.

2) The connecting pipe 43 into which the solution in the lower header 15c of the absorber is sucked into the solution pump 8 enters in a U-shape from below as shown in FIG.

With such a configuration, there is an effect that the gas bubbles separated from the solution do not flow back into the absorber 5 when stopped.

In addition, at the time of starting, the solution is directly sent to the high pressure side where the influence of the non-condensable gas is small.

3) The liquid refrigerant in the liquid refrigerant heat exchanger 59 operates only when the liquid level of the evaporator 4 rises and overflows.

As a result, severe conditions such as i) when the concentration of the solution is high due to poor extraction of the non-condensable gas in the vessel, and ii) when the concentration of the solution is too high due to a high load or outside air temperature, which are conditions under which the solution is excessively concentrated. Under the proper operating conditions, a refrigerant overflow occurs, and the solution in the low-pressure bleeding tank 34 can be cooled to a low temperature by the liquid refrigerant heat exchanger 59, so that the refrigerant vapor pressure in the low-pressure bleeding tank 34 can be lowered, and in particular, the bleeding capacity from the absorber 5 is reduced There is an effect that it can be enlarged.

In addition, the bleeding was improved by utilizing the heat loss of the liquid solvent overflowing.

4) A vacuum pump exhaust pipe 60 communicating with the low-pressure bleeding tank 34 was provided.

Thus, the non-condensable gas in the absorber 5 is collected in the low-pressure bleeding tank 34 along with the flow of the refrigerant vapor, so that low-pressure bleeding can be performed efficiently during maintenance.

Next, still another embodiment (third embodiment) of the present invention will be described with reference to FIG.

FIG. 3 is a partial configuration diagram of a bleed exhaust device of an air-cooled absorption and heating machine according to still another embodiment of the present invention. Components having the same functions as those of the embodiment of FIG. 1 and the embodiment of FIG. 2 are denoted by the same reference numerals.

The embodiment of FIG. 3 is different from the embodiments of FIGS. 1 and 2 in the following points.

1) The check valve 63 is connected to the bleed pipe 32 from the lower header 19 of the condenser 3.
Was provided.

Thereby, the diffusion of the non-condensable gas into the condenser 3 at the time of stopping the operation can be prevented, and the exhaust at the time of startup can be efficiently performed.

2) Separation and recovery of the refrigerant vapor in the air storage tank 30B was performed by the heat exchanger 62 for cooling with the liquid refrigerant in the evaporator 4 (not shown). Further, the condensed and liquefied liquid refrigerant is returned to the lower header 19 of the condenser 3 via the U-shaped liquid seal 65 by the refrigerant return pipe 64 via the float switch 40 relating to the non-condensed gas retained amount detection means in the gas storage tank. did.

The liquid refrigerant flow path to the evaporator 4 in the lower header 19
The outlet of the refrigerant return pipe 64 was positioned lower than the inlet of 66.

As a result, the liquid refrigerant in the U-shaped liquid seal 65 is stored in the air storage tank 30B.
Even if the liquid level rises and falls due to the evacuation operation, the liquid does not run short.

According to the embodiment shown in FIG. 3, there is an effect that it is not necessary to use an expensive solution in the bleeding system as in the embodiment shown in FIG. 1 or FIG.

Next, still another embodiment (fourth embodiment) of the present invention will be described with reference to FIG.

FIG. 4 is a partial configuration diagram of a bleed / exhaust device of an air-cooling absorption cooling / heating machine according to still another embodiment of the present invention. 1st, 2nd
Components having the same functions as those of the embodiment shown in FIG. 3 and the embodiment shown in FIG. 3 are denoted by the same reference numerals.

The embodiment of FIG. 4 differs from the embodiments of FIGS. 1, 2, and 3 in the following points.

1) The storage tank 30C was arranged along the wall of the evaporator 4, and cooling of the refrigerant condensed and recovered in the storage tank 30C was performed using the outer wall of the evaporator 4.

Thereby, the heat exchanger 62 in the embodiment of FIG. 3 can be used also as the outer wall of the evaporator 4.

2) The drive water cooling of the exhaust system is performed by the heat exchanger 56A provided in the refrigerant conduit 23 of the liquid refrigerant flowing back from the indoor unit 10. Only when the water pump 54 is operating, the driving water of the aspirator 48A related to the water ejector is cooled to a low temperature.

3) A float chamber 67 is provided in the middle of the liquid refrigerant flow path 66 connecting the lower header 19 of the condenser 3 and the evaporator 4, so that the float valve 68 prevents outflow of non-condensable gas and refrigerant vapor.

In addition, the jet pump 20A driven by the refrigerant in the branch pipe 70 branched from the discharge side of the refrigerant pump 21 sends the liquid refrigerant to the upper evaporator 4 and prevents the liquid refrigerant from flowing into the condenser 3 when stopped. A check valve 69 is provided.

4) Stop the low pressure bleeding tank 34 shown in the embodiment of FIGS.
The non-condensable gas is taken into the solution by the gas entrainment (gas-liquid mixing) action of the suction part of the solution pump 8, and is sent to the high pressure part where the influence of the gas is small.

The dilute solution tank 71 and the suction part of the solution pump 8 are connected by a communication pipe 72 having a seal part 73, and operate as a liquid amount adjusting mechanism at the time of concentration adjustment.

Next, still another embodiment (fifth embodiment) of the present invention will be described with reference to FIG.

FIG. 5 is a schematic cycle system diagram of an air-cooling absorption air conditioner according to still another embodiment of the present invention.

In the drawing, those having the same functions as those in the embodiment of FIGS. 1 and 2 are denoted by the same reference numerals.

1) The bleeding means of the air-cooled absorber 5 includes a low-pressure bleed chamber 34A connected to a branch pipe 36 branched from the lower part of a third gas-liquid separator 38 provided on the discharge-side pipe of the solution pump 8; A bleed pipe 33 from the lower header 15 of the absorber is connected to the chamber 34A, and the non-condensable gas is mixed into the solution as bubbles by the gas-liquid entrainment effect when the liquid flows out of the low-pressure bleed chamber 34A. 8 and is sent to the gas-liquid separator 38.

With this configuration, a solution with a large amount of non-condensable gas bubbles is sent to the regenerator, and a solution with a small amount of non-condensable gas bubbles circulates in the low-pressure bleed chamber 34A, so that the extraction efficiency can be increased. There are advantages.

Further, since the dilute solution from the absorber 5 is sucked into the solution pump 8 through the U-shaped liquid seal portion 39, even if the solution flows backward when the cooling operation is stopped, the low-pressure bleeding is performed at a lower pressure than the absorber 5. There is an advantage that non-condensable gas easily accumulates in the chamber 34A side.

Further, in the present embodiment, the branch pipe 36 is provided between the flash evaporator (hereinafter simply referred to as evaporator) 4A and the upper part of the vertical pipe of the air-cooled absorber (hereinafter simply referred to as absorber) 5 where cold refrigerant vapor passes. That is, the heat exchanger 59A is provided at a location where the liquid refrigerant that has flowed down falls, and the absorbing solution is cooled by the latent heat of vaporization of the refrigerant vapor and the liquid refrigerant.

The solution is cooled to reduce the refrigerant vapor pressure,
The pressure of 34A is made lower than that of the absorber 5 to suck the non-condensable gas together with the refrigerant vapor, and the refrigerant vapor is absorbed in the solution to increase the non-condensable gas concentration (partial pressure). In this way, the bleeding efficiency is increased.

The solution containing a large amount of non-condensable gas bubbles in the gas-liquid separator 38 is sent to the high-temperature regenerator 1 via the low-temperature heat exchanger 6 and the high-temperature heat exchanger 7 and is heated. It is led to 3 and bled.

2) The non-condensable gas in the condenser 3 is sucked by the bleed pipe 32 into the bleed condenser 30D related to the storage tank together with the refrigerant vapor. The bleed condenser 30D is cooled by the return liquid refrigerant from the indoor unit 10, and the condensed refrigerant is returned to the evaporator 4 via the U-shaped liquid seal 74. The refrigerant is detected by a signal of a liquid level detector (not shown) that detects the liquid level of the U-shaped liquid seal 74 on the side of the bleed condenser 30D and detects the decrease, or a signal of the operation elapsed time by a timer (not shown). The solenoid valve 80 arranged in the branch pipe branched from the discharge side of the pump 21 is opened, and the water ejector is
48B operates. In addition, receiving the signal, the water ejector 4
The electromagnetic valve 45 of the exhaust pipe 47 of 8B is opened, and the non-condensable gas of the bleed condenser 30D is sucked by the water ejector 48B through the manual valve 44, the check valve 46, the electromagnetic valve 45, and the exhaust pipe 47, and the first Gas-liquid separator 5
It is discharged to 0A together with the liquid refrigerant.

In the gas-liquid separator 50A, the liquid surface is sealed by a partition plate 82 at the time of stop so that the tail pipe of the water ejector 48B is in the liquid, and air is injected into the device via the check valves 81 and 46. I try not to leak. When the liquid level of the liquid refrigerant that has exceeded the partition plate 82 rises in the liquid refrigerant return chamber, a signal from the liquid level switch 83 opens the solenoid valve 84 to return the liquid refrigerant to the suction part of the refrigerant pump 21 via the return pipe 85. It is.

If the liquid refrigerant return point is the condenser 3, there is an advantage that even if a little air returns, the air can be immediately extracted.

In addition, as in the above embodiments, the present invention is a system for circulating water, and algae may be generated when light is applied to the stored water. The use of plastics or the like having poor light transmission properties in the system or the incorporation of chemicals can prevent the occurrence of algae, bohula and the like.

[Effects of the Invention] As described above in detail, according to the present invention, it is possible to provide a bleeding / exhausting device of an air-cooling absorption cooling / heating machine which enables automatic bleeding and exhausting without requiring a water supply / drain pipe.

[Brief description of the drawings]

FIG. 1 is a cycle system diagram of an air-cooling absorption air conditioner according to one embodiment of the present invention, FIG. 2 is a main part system diagram of an air cooling absorption air conditioner according to another embodiment of the present invention, and FIG. FIG. 4 is a partial configuration diagram of a bleed / exhaust device of an air-cooling absorption cooling / heating device according to still another embodiment of the present invention. FIG. 4 is a partial configuration of a bleed / exhaust device of an air-cooling absorption cooling / heating device according to still another embodiment of the present invention. FIG. 5 is a schematic cycle system diagram of an air-cooling absorption cooling / heating machine according to still another embodiment of the present invention. 1 ... high temperature regenerator, 2 ... low temperature regenerator, 3 ... condenser
4,4A evaporator, 5 absorber, 6 low temperature heat exchanger,
7 High-temperature heat exchanger, 8 Solution pump, 10 Indoor unit, 15 Lower header, 19 Lower header, 20, 21 ...
Refrigerant pump, 20A ... Jet pump, 23 ... Refrigerant conduit, 25 ... Hot refrigerant pipe, 30,30A, 30B, 30C ... Air storage tank, 30
D ... Bleed condenser, 31 ... Orifice, 32,33a, 33b, 33c
…… Bleed tube, 34 …… Low pressure bleed tank, 34A …… Low pressure bleed chamber, 3
5 ... gas-liquid conduit, 36 ... branch pipe, 36a, 36b ... conduit, 37 ...
... cooler, 38 ... gas-liquid separator, 39 ... U-shaped liquid seal part,
40: Float switch, 41: Reverse U-shaped liquid seal, 42
…… Solution return pipe, 45 …… Solenoid valve, 46 …… Check valve, 47 ……
Exhaust pipe, 48… Water ejector, 49… Gas-liquid conduit, 50, 50A…
... gas-liquid separator, 51 ... gas-liquid separator, 52 ... solenoid valve, 53 ...
… Float switch, 54 …… Water pump, 55 …… Water conduit,
57 ... check valve, 56 ... cooler, 59 ... liquid refrigerant heat exchanger,
64: refrigerant return pipe, 65: U-shaped liquid seal, 71: dilute solution tank, 72: communication pipe, 74: U-shaped liquid seal, 80: solenoid valve, 81: check valve.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Daisuke Hisashima 502 Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. In the Mechanical Research Laboratory (56) References JP-A-63-201463 (JP, A) JP-A-63-254363 (JP, A) JP-A-61-71873 (JP, U) JP-A-58-96485 (JP, A) U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) F25B 43/04

Claims (10)

(57) [Claims] 1. An air-cooled absorption air conditioner comprising a regenerator, an air-cooled condenser, an evaporator, an air-cooled absorber, a solution heat exchanger, a solution pump, a refrigerant pump, and a piping system for operatively connecting them. A tank; an extraction unit for extracting and collecting non-condensable gas in the machine into the storage tank; a unit for detecting an amount of non-condensable gas remaining in the storage tank; the storage tank; a solenoid valve; A water ejector connected via a stop valve, a gas-liquid separator located on the outlet side of the water ejector, a means for circulating the water of the gas-liquid separator to the water ejector, and cooling the drive water of the water ejector And a bleeding and exhausting device for an air-cooling absorption cooling and heating machine. 2. An outdoor unit comprising a regenerator, an air-cooled condenser, an evaporator, an air-cooled absorber, a solution heat exchanger, a solution pump, a refrigerant pump, and a piping system operatively connecting them, An air-cooling absorption cooling / heating machine provided with a refrigerant pump and a piping system circulating through the machine, comprising: at least an air storage tank; a gas extraction means for extracting non-condensable gas in the machine to the air storage tank for collection; A water ejector connected via an electromagnetic valve and a check valve, a first gas-liquid separator located on the outlet side of the water ejector, and a first gas-liquid separator located in the middle of a pipe of a liquid refrigerant returning from the indoor unit. A gas-liquid separator, an extraction pipe connecting an upper part of the second gas-liquid separator and the gas storage tank via an electromagnetic valve, and an amount of non-condensable gas retained in the second gas-liquid separator. Extraction means for air-cooled absorption cooling / heating machine characterized by comprising means for detecting Exhaust device. 3. The bleeding means includes: an air-cooled condenser gas-phase portion and an air storage tank connected by an bleed pipe via an orifice; The bleed / exhaust device for an air-cooling absorption cooler / heater according to claim 1, wherein the bleed / exhaust device is connected via a seal. 4. The bleeding means includes: an air-cooled condenser gas-phase portion connected to an air storage tank via an bleed pipe via an orifice; and a lower part of the air storage tank and a suction part of a solution circulation pump are connected in an inverted U-shape. The bleed / exhaust device for the air-cooling absorption cooling / heating machine according to claim 1 or 2, wherein the bleeding / exhausting device is connected via a liquid seal. 5. A bleed means of the air-cooled absorber comprises: a branch pipe separated from the solution pump discharge side pipe; a low-pressure bleed chamber connected to the branch pipe; a gas suction part of the low-pressure bleed chamber; and a lower part of the air-cooled absorber. A bleeding pipe connecting the header and the bleeding chamber, a discharge part of the low-pressure bleeding chamber is connected to a solution pump suction part, and a third gas-liquid separator is provided at a branch part of the branch pipe, and a regenerator side is provided. 5. The bleeding exhaust device for an air-cooling absorption cooler / heater according to claim 1, wherein the gas-mixed solution flows out and a solution with a small gas-mixed amount is supplied to the solution ejector side. 6. The bleeding / exhausting device for an air-cooling absorption cooling / heating machine according to claim 5, wherein a solution cooling means is provided in the middle of the branch pipe. 7. The bleeding / exhaust device for an air-cooling absorption chiller / heater according to claim 1, wherein the bleeding means of the air-cooling absorber is based on a gas-liquid mixing action of a solution pump suction part. 8. The bleed / exhaust device for an air-cooling absorption cooler / heater according to claim 1, wherein a check valve is provided in an exhaust pipe of the first gas-liquid separator. 9. A bleed / exhaust device for an air-cooling absorption cooling / heating machine according to claim 1, wherein the driving water for the water ejector is cooled by a liquid refrigerant of an evaporator. 10. A bleed / exhaust device for an air-cooling absorption cooler / heater according to claim 1, wherein the drive water for the water ejector is cooled by a liquid refrigerant flowing back from the indoor unit. .