JP3413565B2 - Control device and control method for air-cooling absorption air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device and a control method for an air-cooled absorption cooling / heating machine, and more particularly to a control device and a control method for an air-cooling absorption cooling / heating machine for determining a vacuum abnormality of the air-cooling absorption cooling / heating machine. .

[0002]

2. Description of the Related Art Conventionally, many control apparatuses and control methods for absorption cooling / heating machines have been used for water-cooling absorption cooling / heating machines. In the case of a water-cooled absorption cooling / heating machine, the cooling temperature does not fluctuate as much as in the case of the air-cooling absorption cooling / heating machine, and it is possible to determine a vacuum abnormality by simply capturing the temperature of the evaporator. However, in the case of air-cooled absorption air conditioners,
Since the outside air temperature fluctuates greatly, it is difficult to determine a vacuum abnormality simply by capturing the temperature of the evaporator.

FIG. 4 is a principle diagram showing a control device 2 for an air-cooled absorption cooling / heating machine according to the prior art. The conventional air-cooled absorption air conditioner has a high temperature regenerator 16 having a heating source 22 for heating the dilute solution 25b and a dilute solution 2 heated by the high temperature regenerator 16.
Separator 17 for separating 5a into refrigerant vapor 28a and intermediate concentration solution 26a, and intermediate concentration solution 26a from separator 17
And the high temperature solution heat exchanger 18 for exchanging heat with the dilute solution 25c flowing into the high temperature regenerator 16, and the intermediate concentration solution 26b is heated by the refrigerant vapor 28a introduced from the separator 17 to form the refrigerant vapor 28b and the concentrated solution 27a. Low temperature regenerator 19
And a condenser 3 for condensing the refrigerant vapors 28a, 28b from the low temperature regenerator 19.

Further, the liquid refrigerant 29 condensed by the condenser 3
The refrigerant storage chamber 34 for storing a, and the liquid refrigerant 29a in the refrigerant storage chamber 34 are connected to the refrigerant pump 33 and the liquid refrigerant feed pipe 32a.
The low-pressure evaporator 4 which sprays the liquid refrigerant 29b sent out via the evaporator to evaporate it to cool the hot water 30a as the heat transfer medium 30 into the cold water 30b (expressed by the relative temperature difference of water).
And a low temperature heat exchanger 20 for cooling the concentrated solution 27a flowing from the low temperature regenerator 19 by exchanging heat with the dilute solution 25c flowing into the high temperature solution heat exchanger 18, and spraying the concentrated solution 27b from the low temperature heat exchanger 20. The absorber 13 that absorbs the refrigerant vapor flowing from the evaporator 4 to form the diluted solution 25d, and the absorber 13
It has a solution circulating pump 21 for pressure-feeding the dilute solution 25d generated in 1) to the high temperature regenerator 16 via the low temperature solution heat exchanger 20 and the high temperature solution heat exchanger 18. Note that reference numeral 12 is a blower that takes in outside air for cooling the condenser and the absorber.

[0005]

As described above, the air-cooled absorption air conditioner is a vacuum device for evaporating the liquid refrigerant, and when a non-condensable gas is generated and a vacuum leak occurs, the degree of vacuum is reduced. Lowers, the evaporation temperature of the evaporator 4 rises, and the cooling capacity decreases. Therefore, the control device 2 for the conventional air-cooled absorption cooling / heating machine has the evaporator 4
The evaporator temperature sensor 5 is provided in the control panel 14 to detect the evaporation temperature of the liquid refrigerant 29b, and the result is input to the controller 14.
I was trying to give an alarm at 5.

However, the control device 2 of the conventional air-cooling absorption cooling / heating machine cannot correct the temperature rise of the evaporator 4 when the outside air temperature rises to a value close to the upper limit of the operating range of the air-cooling absorption cooling / heating machine, and thus cannot be properly adjusted. I couldn't make a decision.

An object of the present invention is to provide a control device and a control method for a direct air-cooling absorption cooling / heating machine, which can easily and surely determine a vacuum abnormality which causes a non-condensable gas generation and a capacity deterioration due to a vacuum leak. An object is to provide a control device and a control method for an air conditioner.

[0008]

In order to achieve the above object, the present invention provides a condenser for condensing a refrigerant vapor into a liquid refrigerant, and a liquid refrigerant in the condenser to be sprayed and evaporated to be sent to an indoor unit. An air-cooled absorption cooling / heating machine that has a low-pressure evaporator that cools a heat carrier medium and an absorber that absorbs a refrigerant vapor generated by evaporation in the evaporator into a dilute solution and determines a vacuum abnormality In the control device, the evaporation temperature detecting means for detecting the evaporation temperature of the liquid refrigerant, the outside air temperature detecting means for detecting the outside air temperature, the detected evaporation temperature detected by the evaporation temperature detecting means and the outside air temperature detecting means are detected. The control unit compares the proper evaporation temperature of the liquid refrigerant corresponding to the outside air temperature, and determines that the vacuum is abnormal when the detected evaporation temperature is higher than the proper evaporation temperature.

Further, in the above invention, the proper evaporation temperature of the liquid refrigerant corresponds to the outside air temperature detected by the outside air temperature detecting means, and is determined by the solution characteristic in which the refrigerant vapor is absorbed by the absorbent.

Further, in any one of the above inventions, the control unit determines that the vacuum is abnormal when the detected evaporation temperature is higher than an upper limit evaporation temperature obtained by adding a predetermined temperature difference to the proper evaporation temperature.

Further, in any one of the above-mentioned inventions, the control device for the air-cooled absorption cooling / heating machine is provided with an alarm means for receiving an alarm of a vacuum abnormality from the control section and issuing an alarm.

In any one of the above inventions, the outside air temperature detecting means is provided on the cooling air intake side of the air-cooling absorption cooling / heating machine for sucking the cooling air which is the outside air.

Further, the refrigerant vapor is cooled and condensed by the outside air, and the condensed liquid refrigerant is sprayed and evaporated to cool the heat carrier medium sent to the indoor unit and absorb the evaporated refrigerant vapor of the liquid refrigerant. In the control method of the air-cooled absorption air conditioner that determines the vacuum abnormality of the air-cooled absorption air conditioner that absorbs the absorbed heat generated at this time by the outside air, it is detected evaporation that detects the evaporation temperature of the liquid refrigerant. The detected evaporation temperature is compared with the upper limit evaporation temperature obtained by adding a predetermined temperature difference to the evaporation temperature of the liquid refrigerant determined by the solution characteristics in which the refrigerant vapor is absorbed by the absorbent corresponding to the outside air temperature. It is to judge that the vacuum is abnormal when the temperature is higher than the temperature.

[0014]

According to the controller of the air-cooling absorption cooling / heating machine of the present invention, it is provided with the evaporation temperature detecting means and the outside air temperature detecting means, and the detected evaporation temperature detected by the evaporation temperature detecting means and the outside air temperature detected by the outside air temperature detecting means. Comparing with the appropriate evaporation temperature of the liquid refrigerant corresponding to, and the control unit for determining a vacuum abnormality when the detected evaporation temperature is higher than the appropriate evaporation temperature, the detection target is the evaporation temperature of the evaporator and the outside air temperature. The physical properties are relatively easy to measure, and the non-condensable property is easily compared with the detected evaporation temperature based on the appropriate evaporation temperature of the liquid refrigerant that corresponds to the outside air temperature that actually detected the outside air temperature that has easily fluctuated in conventional air-cooled absorption cooling and heating machines. It is possible to determine a vacuum abnormality that causes a capacity decrease due to gas generation and vacuum leakage.

Further, in the above invention, the proper evaporation temperature of the liquid refrigerant corresponds to the outside air temperature detected by the outside air temperature detecting means, and is determined by the solution characteristic in which the refrigerant vapor is absorbed by the absorbent. In addition, it is possible to provide a control unit that determines a vacuum abnormality based on a reliable proper evaporation temperature based on the solution characteristics.

Further, in any one of the above inventions, the controller determines that the vacuum is abnormal when the detected evaporation temperature is higher than an upper limit evaporation temperature obtained by adding a predetermined temperature difference to the proper evaporation temperature. In addition to the above function, it is possible to reliably detect the evaporation temperature exceeding the range of variation and to reliably determine the vacuum abnormality of the air-cooling absorption cooling / heating machine. To the contrary, it is possible to prevent an error in which the vacuum state of the air-cooled absorption cooling / heating machine operating under the normal evaporation temperature within the range of variation is determined to be abnormal.

Further, in any one of the above-mentioned inventions, the control device for the air-cooling absorption cooling / heating machine is provided with an alarm means for receiving a signal of a vacuum abnormality from the control unit to give an alarm. In addition, in the event of a vacuum abnormality in the air-cooled absorption cooling / heating machine, an alarm is issued by the alarm means, so that it is possible to take prompt action.

In any one of the above inventions, the outside air temperature detecting means is provided on the cooling air intake side of the air-cooling absorption cooling / heating machine for sucking the cooling air which is the outside air, in addition to the function of any one of the above inventions. By reliably detecting the outside air temperature, the operation of the control device of the air-cooling absorption cooling / heating machine can be ensured and the reliability can be made high.

Further, according to the control method of the air-cooling absorption cooling / heating machine of the present invention, the detected evaporation temperature of the liquid refrigerant is detected, and the evaporation temperature of the liquid refrigerant corresponding to the outside air temperature and determined by the solution characteristic is a predetermined temperature. This is to compare the upper limit evaporation temperature with the difference and judge that there is a vacuum abnormality when the detected evaporation temperature is higher than the upper limit evaporation temperature. Based on the proper evaporation temperature of the liquid refrigerant that corresponds to the outside air temperature, it is possible to easily and surely catch the evaporation temperature that exceeds the range of variation, and to reliably judge the vacuum abnormality of the air-cooled absorption cooling and heating machine. I can.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control device and control method for an air-cooled absorption cooling / heating machine according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a principle diagram showing an embodiment of a control device for an air-cooling absorption cooling / heating machine according to the present invention, and FIG. 2 is a relationship curve diagram between an outside air temperature and an evaporation temperature of a liquid refrigerant. The outside air temperature is plotted on the horizontal axis and the evaporation temperature is plotted on the vertical axis, and an appropriate evaporation temperature curve 6 and an upper limit evaporation temperature curve 7 are shown. The symbol Td represents the operating range lower limit outside air temperature of the air-cooling absorption cooling / heating machine, and the symbol Tu similarly represents the operating range upper limit outside air temperature.

Controller 1 for air-cooled absorption air conditioner / heater of this embodiment
Is the liquid refrigerant 29a by condensing the refrigerant vapors 28a and 28b.
Condenser 3, a refrigerant storage chamber 34 for storing the liquid refrigerant 29a concentrated by the condenser 3, and the refrigerant storage chamber 3
The liquid refrigerant 29a of No. 4 is supplied to the refrigerant pump 33 and the liquid refrigerant feed pipe 3
The liquid refrigerant 29b sent out via 2a is sprayed and evaporated, and the low-pressure evaporator 4 that cools the hot water 30a that is the heat transfer medium 30 to send it to the indoor unit as the cold water 30b, and evaporates in the evaporator 4. It has an absorber 13 that absorbs the generated refrigerant vapor into an absorbent to form a dilute solution 25d, and determines a vacuum abnormality of the air-cooled absorption cooling / heating machine.

The evaporator temperature sensor 5 which is the evaporation temperature detecting means for detecting the evaporation temperature of the liquid refrigerant 29b, the outside air temperature sensor 11 which is the outside air temperature detecting means for detecting the outside air temperature, and the evaporator temperature sensor 5 are provided. Detected evaporation temperature T
er and the upper limit evaporation temperature Tea obtained by adding a predetermined temperature difference to the proper evaporation temperature Teb of the liquid refrigerant which corresponds to the outside air temperature Ta detected by the outside air temperature sensor 11 and is determined by the solution characteristics in which the refrigerant vapor is absorbed by the absorbent. The control unit 14 determines that the vacuum is abnormal when the detected evaporation temperature Ter is higher than the upper limit evaporation temperature Tea. The outside air temperature sensor 11 is arranged at a position that is not affected by solar radiation, rainfall, etc. and is on the suction side of the cooling air that is the outside air.

The outside air temperature sensor 11 is the condenser 3 in FIG.
Although it is shown on the cooling air suction side of the above, this is for convenience of drawing, and it may be arranged on the upstream side of the absorber 13, that is, on the cooling air suction side of the absorber 13 not passing through the condenser 3. Further, as shown in FIG. 1, the evaporator temperature sensor 5 is provided near the outlet of the liquid refrigerant feed pipe 32a in the evaporator 4.

Further, the control device 1 for the air-cooled absorption cooling / heating machine.
Is provided with an operation panel 15 having alarm means for receiving a vacuum abnormality signal from the control unit 14 and issuing an alarm. still,
The other parts in FIG. 1 which are the same as those in FIG. 4 described in the related art in the operation and function parts are designated by the same reference numerals, and the description thereof will be omitted.

The controller 1 of the air-cooled absorption cooling / heating machine of the embodiment shown in FIG. 1 having the above-mentioned structure operates as follows. That is, the detected evaporation temperature Ter detected by the evaporator temperature sensor 5
And a proper evaporation temperature Teb of the liquid refrigerant corresponding to the outside air temperature Ta detected by the outside air temperature sensor 11 and provided with a controller 14 for determining a vacuum abnormality when the detected evaporation temperature Ter is higher than the appropriate evaporation temperature Teb. Is a physical property that is relatively easy to measure, that is, the evaporation temperature of the evaporator 4 and the outside air temperature, and the proper evaporation of the liquid refrigerant corresponding to the outside air temperature that actually detects the outside air temperature that easily fluctuates in the conventional air-cooling absorption cooling and heating machine. Based on the temperature Teb, it becomes possible to easily determine the vacuum abnormality that causes the generation of the non-condensable gas and the deterioration of the performance due to the vacuum leak.

Further, the proper evaporation temperature Teb of the liquid refrigerant corresponds to the outside air temperature Ta detected by the outside air temperature sensor 11 and is determined by the solution characteristic in which the refrigerant vapor is absorbed by the absorbent, and the proper evaporation temperature Teb is ensured. It is possible to provide a control unit 14 that determines a vacuum abnormality based on the above.

Further, the control unit 14 controls the detected evaporation temperature Ter.
Is a vacuum abnormality when it is higher than the upper limit evaporation temperature Tea obtained by adding a predetermined temperature difference to the proper evaporation temperature Teb, the evaporation temperature exceeding the range of variation is reliably captured, and the vacuum abnormality of the air-cooled absorption cooling / heating machine is trusted. It can be judged highly. At the same time, this also prevents an error in which the vacuum state of the air-cooled absorption cooling / heating machine operating under normal evaporation temperature within the range of variation is determined to be abnormal.

In FIG. 2, the proper evaporation temperature curve 6 is an evaporator liquid refrigerant evaporation temperature-outside air temperature characteristic curve previously obtained from the characteristics of the absorbing solution or a product test, and corresponds to the outside air temperature detected by the outside air temperature sensor 11. It shows the evaporation temperature of the liquid refrigerant determined by the solution characteristic, and the solution characteristic means the characteristic of the solution in which the refrigerant vapor is absorbed by the absorbent. The proper evaporation temperature curve 6 is shown as a straight line in this embodiment, but is generally a curve. For the outside air temperature Ts detected by the outside air temperature sensor 11, the proper evaporation temperature is the symbol Tes.
It becomes the value shown in.

The upper limit evaporation temperature curve 7 is an abnormality determination curve obtained by shifting the appropriate evaporation temperature curve 6 higher in consideration of product variations or individual differences. A value obtained by adding a predetermined temperature difference, for example, a few degrees to the proper evaporation temperature curve 6, is a value determined in consideration of the dispersion of the solution, the air-cooling absorption cooling / heating machine, etc., and the normal evaporation temperature within the range of dispersion. It is possible to prevent an error in which the vacuum state of the air-cooling absorption cooling / heating machine which is operated by and is determined to be abnormal.

The determination of the vacuum abnormality in the control unit 14 receives the respective signals and corrects the influence of the outside air temperature to make an appropriate determination. Detected evaporation temperature Ter detected by the evaporator temperature sensor 5
On the other hand, the outside air temperature Ta detected by the outside air temperature sensor 11 is used to compare with the upper limit evaporation temperature Tea obtained from the upper limit evaporation temperature curve 7 shown in FIG. 2, and Ter> Tea, that is, the detected evaporation temperature Ter is the upper limit. When the temperature is higher than the evaporation temperature Tea, it is determined that the non-condensable gas is generated or a vacuum leak occurs, and it is determined that the vacuum is abnormal.

Further, the determination of the vacuum abnormality by the control unit 14 is such that a predetermined time, for example, at least 30 minutes or more has elapsed after the start of the cooling operation, and a certain time after that, for example, at least 30 minutes or more, the high-temperature regenerator has high combustion. Is performed under stable and stable conditions. Further, the control device 1 of the present embodiment is provided with an operation panel 15 which receives a signal of a vacuum abnormality from the control unit 14 and gives an alarm. When the vacuum abnormality of the air-cooled absorption cooling / heating machine occurs, the control panel 15 is operated by the operation panel 15. An alarm will be issued and you can take immediate action.

Then, the detected evaporation temperature Ter detected by the evaporator temperature sensor 5 executed by the controller 14 and the appropriate evaporation temperature Teb of the liquid refrigerant or the upper limit evaporation temperature Tea corresponding to the outside air temperature Ta detected by the outside air temperature sensor 11 are set. Compare
When the detected evaporation temperature Ter is higher than the proper evaporation temperature Teb or the upper limit evaporation temperature Tea, the control operation for determining a vacuum abnormality and issuing an alarm is performed at a predetermined time interval, for example, several times or several tens of times per second. , Is constantly monitoring for vacuum abnormalities.

When it is determined that the vacuum is abnormal as described above,
For example, it can be processed by any of the following controls.

An alarm is issued.

The alarm stops the operation of the air-cooled absorption cooling / heating machine.

The alarm and an evacuation device such as a vacuum pump are interlocked with each other so that the evacuation is performed simultaneously with the alarm.

While the exhaust is being performed, the alarm is continuously issued, and the alarm is ended when the capacity is restored (the exhaust device is not shown).

Exhaust time is about 30 minutes, then 30 minutes
If the ability does not recover after continuing driving for a minute, stop the operation.

According to the controller 1 of the air-cooling absorption cooling / heating machine of the embodiment shown in FIG. 1, it is possible to easily and surely determine the vacuum abnormality by adding and controlling the outside air temperature sensor 11. The outside air temperature sensor 11 provided on the cooling air intake side of the air-cooling absorption cooling / heating machine that sucks the cooling air that is the outside air detects the outside air temperature, and thereby operates the controller 1 of the air-cooling absorption cooling / heating machine. It can be reliable and reliable.

Next, FIG. 3 is a principle view showing another embodiment of the control device for the air-cooling absorption cooling / heating machine according to the present invention. The control device for the air-cooled absorption air conditioner / heater of the embodiment shown in FIG. 3 is obtained by adding the following devices to the air-cooled absorption air conditioner-heater of FIG. That is, in the evaporator 4, the liquid refrigerant feed pipe 32a
A liquid refrigerant receiver 31 for receiving the unevaporated liquid refrigerant, and a liquid refrigerant return pipe 32b for returning the unevaporated liquid refrigerant to the refrigerant storage chamber 34, of the liquid refrigerant 29a sent through Is.

In FIG. 3, the outside air temperature sensor 11 is installed at the same place as the embodiment shown in FIG. Further, the evaporator temperature sensor 5 may be provided in the vicinity of the outlet of the liquid refrigerant feed pipe 32a in the evaporator 4 shown in FIG. 1, or in the middle of the liquid refrigerant receiver 31 or the liquid refrigerant return pipe 32b.

Regarding the operation of the embodiment of FIG. 3, in addition to the operation of the embodiment of FIG. 1, by supplying sufficient liquid refrigerant 29b to the evaporator 4, the hot water 30a is sufficiently cooled and the liquid not yet evaporated By receiving the refrigerant 29b by the liquid refrigerant receiver 31 and returning it to the refrigerant storage chamber 34, the false alarm of the vacuum abnormality is prevented.

In the embodiment of FIG. 3, the same structure and function as those of the embodiment of FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

Further, in the description of the embodiments of FIGS. 1 and 3, the heat carrier medium 30 sent from the air-cooling cooling / heating machine of this embodiment to the indoor unit etc. is explained as cold / hot water (30a, 30b). The heat carrier medium 30 in the embodiment is not limited to this, and other than water, a mixture of CFC, alcohol and water + latent heat agent can be used.

Further, in the conditions of the embodiment shown in FIGS. 1 and 3, the following conditions are added to prevent false alarms in consideration of the case where the air-cooled absorption cooling / heating machine is overloaded.

When the heat transfer medium 30 is water, alcohol, or the like (in the case of sensible heat transfer): (Temperature difference ΔT of heat transfer medium 30 × heat transfer medium 3)
(Flow rate of 0 x specific gravity of heat carrier medium 30 x specific heat of heat carrier medium 30) is lower than the rated capacity of the absorption cooling and heating machine by a certain amount or more, for example, 30% lower. Here, the inlet / outlet temperature difference ΔT of the heat carrier medium 30 is obtained by attaching, detecting, and calculating a temperature sensor (not shown) near the heat carrier medium 30 inlet / outlet of the air conditioner.

Regarding the flow rate of the heat carrier medium 30, the rated flow rate of the air conditioner is stored in the controller in advance. However, it is assumed that the actual flow rate is adjusted to the rated flow rate when the air conditioner is installed.

When the heat carrier medium 30 is chlorofluorocarbon, water + latent heat agent, etc. (in the case of latent heat carrier): The air-cooled absorption cooling / heating machine is equipped with the liquid refrigerant receiver 31, the liquid refrigerant return pipe 32b, and the medium pump 33. The amount of liquid refrigerant that has been vaporized in the evaporator 4 is being sent sufficiently (see FIG. 3).

A. Based on the above premise, the outlet of the refrigerant pump 33 and the liquid refrigerant return pipe 32b are equipped with flowmeters (not shown), and the flow rate difference between the outlet of the refrigerant pump 33 and the liquid refrigerant return pipe 32b is below a predetermined flow rate, for example, 10RT. If it is an air-cooled absorption cooling / heating machine with the capacity, it should be 40-50 l / h.

B. Further, the flow meter should be attached only to the liquid refrigerant return pipe 32b, and its flow rate should exceed a certain flow rate.

The determination of the overload state of the above a and b is also valid for the heat carrier medium 30 of the above item.

Next, the control method of the air-cooled absorption air conditioner of this embodiment is such that the refrigerant vapor is cooled and condensed by the outside air, and the condensed liquid refrigerant is sprayed and evaporated to send it to the indoor unit. By cooling 30 and absorbing the evaporated refrigerant vapor of the liquid refrigerant by the absorbent to form a dilute solution, the absorption heat generated at this time is absorbed by the outside air to determine the vacuum abnormality of the air-cooled absorption cooling / heating machine. Then, the detected evaporation temperature Ter that detects the evaporation temperature of the liquid refrigerant, and FIG.
As shown in, the upper limit evaporation temperature Tea obtained by adding a predetermined temperature difference to the evaporation temperature of the liquid refrigerant, which corresponds to the outside air temperature Ta and is determined by the solution characteristics in which the refrigerant vapor is absorbed by the absorbent, is compared, and the detected evaporation temperature Ter Is higher than the upper limit evaporation temperature Tea.

Therefore, the control method of the air-cooled absorption air conditioner according to the present embodiment operates as follows. That is, the objects to be detected are relatively easy to measure physical properties such as the evaporation temperature and the outside air temperature, and based on the appropriate evaporation temperature of the liquid refrigerant corresponding to the easily changing outside air temperature, it is possible to easily and surely evaporate beyond the range of variation. It is possible to reliably detect the temperature and reliably determine a vacuum abnormality in the air-cooling absorption cooling / heating machine.

Although the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to these embodiments by using the embodiments, and various modifications can be made without departing from the spirit of the present invention. In addition, it goes without saying that various modifications can be made.

[0055]

According to the controller of the air-cooling absorption cooling / heating machine of the present invention, it is provided with the evaporation temperature detecting means and the outside air temperature detecting means, and the detected evaporation temperature detected by the evaporation temperature detecting means and the outside air temperature detecting means are detected. The one provided with a control unit for comparing the proper evaporation temperature of the liquid refrigerant corresponding to the outside air temperature has relatively easy measurement physical properties such as the evaporation temperature of the evaporator and the outside air temperature, and easily non-condensates. It is possible to determine a vacuum abnormality that causes performance deterioration due to generation of volatile gas and vacuum leak.

Further, in the above invention, the proper evaporation temperature of the liquid refrigerant corresponds to the outside air temperature detected by the outside air temperature detecting means and is determined by the solution characteristics. It is possible to provide a control unit for determining a vacuum abnormality based on the above.

Further, in any one of the above inventions, in the case where the control unit judges that the vacuum is abnormal when the detected evaporation temperature is higher than the upper limit evaporation temperature, in addition to the effect of any one of the above inventions, the range of variation is exceeded. Be sure to capture the evaporation temperature,
The vacuum abnormality of the air-cooled absorption air conditioner can be reliably determined.

Further, in any one of the above inventions, there is provided an alarm means for issuing an alarm in response to a vacuum abnormality signal from the control section. In addition to the effect of any one of the above inventions, the vacuum of the air-cooled absorption cooling / heating machine is provided. In the event of an abnormality, an alarm is issued by the alarm means, so that appropriate countermeasures can be taken.

In any one of the above inventions, the outside air temperature detecting means is provided on the cooling air suction side of the air-cooling absorption cooling / heating machine for sucking the cooling air which is the outside air, in addition to the effects of any one of the above inventions. The operation of the control device for the air-cooling absorption cooling / heating machine can be ensured and the reliability can be improved.

Further, according to the control method of the air-cooled absorption cooling / heating machine of the present invention, the detected evaporation temperature is compared with the upper limit evaporation temperature, and when the detected evaporation temperature is higher than the upper limit evaporation temperature, it is judged that the vacuum is abnormal. The objects to be detected are the evaporation temperature and the outside air temperature, which are relatively easy to measure, and can easily and surely catch the evaporation temperature beyond the range of variation, and reliably judge the vacuum abnormality of the air-cooled absorption cooling and heating machine. Is a method that can be done.

[Brief description of drawings]

FIG. 1 is a principle diagram showing an embodiment of a control device for an air-cooled absorption cooling / heating machine according to the present invention.

FIG. 2 is a relationship curve diagram between an outside air temperature and an evaporation temperature of a liquid refrigerant.

FIG. 3 is a principle view showing another embodiment of the control device for the air-cooled absorption cooling / heating machine according to the present invention.

FIG. 4 is a principle diagram showing a control device for an air-cooled absorption cooling / heating machine according to a conventional technique.

[Explanation of symbols]

1 Air-cooled absorption air conditioner control device 3 condenser 4 evaporator 5 Evaporator temperature sensor (evaporation temperature detection means) 11 Outside air temperature sensor (outside air temperature detecting means) 13 absorber 14 Control unit 15 Control panel (alarm means) 25a-25d dilute solution 28a, 28b Refrigerant vapor 29 liquid refrigerant 30 heat transfer medium 30a hot water 30b cold water

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Tonomiya 1370 Koyasu-cho, Hamamatsu-shi, Shizuoka Yazaki General Co., Ltd. (72) Inventor Masayuki Kondo 1370 Koyasu-cho, Hamamatsu-shi, Shizuoka In-house (72) Inventor Yasuhiro Omori 1370 Koyasu-cho, Hamamatsu-shi, Shizuoka Yazaki Sogo Co., Ltd. (72) Inventor Naoshi Takahashi 1370 Koyasu-cho, Hamamatsu-shi, Shizuoka Pref. In-house (72) Inventor Seiichiro Fujimaki 3-1-4-304 Edahigashi, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor ▲ Takataka Kawakami 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Osaka Gas Incorporated (72) Inventor Mitsuharu Matsubara 19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi Toho Gas Co., Ltd. (56) Reference JP-A-6-159851 (J , A) JP-A-2-33584 (JP, A) JP-A-7-13637 (JP, A) JP-A-64-85280 (JP, A) JP-A-3-91664 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 15/00 306 F25B 43/04 F25B 49/04

Claims (6)

(57) [Claims] 1. A condenser (3) for condensing a refrigerant vapor (28a, 28b) into a liquid refrigerant, and heat for spraying and evaporating the liquid refrigerant (29) of the condenser (3) to an indoor unit. A low-pressure evaporator (4) for cooling the carrier medium (30) and an absorber (13) for absorbing a refrigerant vapor generated by evaporation in the evaporator (4) by an absorbent to form a dilute solution (25d). In the control device (1) of the air-cooling absorption cooling / heating machine for determining a vacuum abnormality, the evaporation temperature detecting means (5) for detecting the evaporation temperature of the liquid refrigerant (29), and the outside air temperature for detecting the outside air temperature. Proper evaporation temperature of the liquid refrigerant corresponding to the detection means (11), the detected evaporation temperature (Ter) detected by the evaporation temperature detection means (5) and the outside air temperature (Ta) detected by the outside air temperature detection means (11). (Teb), and the detected evaporation temperature (Ter) is appropriate. A controller for an air-cooled absorption cooling / heating machine, comprising: a control section (14) for determining a vacuum abnormality when the temperature is higher than an evaporation temperature (Teb). 2. The solution characteristic according to claim 1, wherein the proper evaporation temperature (Teb) of the liquid refrigerant corresponds to the outside air temperature Ta detected by the outside air temperature detecting means (11) and the refrigerant vapor is absorbed by the absorbent. A control device for an air-cooled absorption air conditioner / heater characterized by being determined by. 3. The control unit (14) according to claim 1, wherein the detected evaporation temperature (Ter) is higher than an upper limit evaporation temperature (Tea) obtained by adding a predetermined temperature difference to the proper evaporation temperature (Teb). A control device for an air-cooled absorption air conditioner, which is characterized in that it is judged as a vacuum abnormality when the temperature is high. 4. The air-cooled absorption according to claim 1, further comprising an alarm means (15) for receiving an alarm of a vacuum abnormality signal from the control section (14). Control device for air conditioners. 5. The outside air temperature detecting means (11) according to claim 1, wherein the outside air temperature detecting means (11) is provided on a cooling air intake side of the air-cooled absorption cooling / heating machine that sucks cooling air that is the outside air. A control device for an air-cooled absorption air conditioner. 6. The heat transfer medium sent to the indoor unit is cooled by cooling and condensing the refrigerant vapor by the outside air, and then spraying and evaporating the condensed liquid refrigerant to absorb the evaporated refrigerant vapor of the liquid refrigerant. In the control method of the air-cooled absorption air conditioner that determines the vacuum abnormality of the air-cooled absorption air conditioner that absorbs the absorbed heat generated at this time by the outside air, it is detected evaporation that detects the evaporation temperature of the liquid refrigerant. The detected evaporation temperature is compared with the upper limit evaporation temperature obtained by adding a predetermined temperature difference to the evaporation temperature of the liquid refrigerant determined by the solution characteristics in which the refrigerant vapor is absorbed by the absorbent corresponding to the outside air temperature. A method for controlling an air-cooled absorption cooling / heating machine, which is characterized in that a vacuum abnormality is determined when the temperature is higher than the temperature.