JPH10111037A - Cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent trouble in a cooling unit of a heating medium by effecting cooling operation smoothly by the cooling unit. SOLUTION: A cooler is constituted so as to effect room cooling by cooling heating medium, conducted through a medium circulation passage 2 for cooling through a cooling device 9 provided with a refrigerant circulation system 48, having an evaporator 44, an absorber 45, a reproducer 46 and a condenser 47, and a circulation passage 61 of water, absorbing and radiating the heat of refrigerant vapor of the refrigerant circulation system 48. In this case, electrodes 1a, 1b are arranged so as to be opposed in the circulation passage 61 of water with an interval to impress an AC voltage on the electrodes 1a, 1b by an electrode driving unit 64 and restrain the deposit of scale constituents in the water of the circulation passage 61 while a conducted current between the electrodes 1a, 1b is detected by a current detecting sensor 69. When the detected current is higher than a set threshold value of the current, the amount of combustion heat of an absorbing liquid heating burner 60 is reduced to reduce a heat medium cooling efficiency by a cooling device 9 while the combustion of the absorbing liquid heating burner 60 is stopped and a control for stopping the cooling operation is effected by a cooling control unit 68 when the detected current is higher than a cooling stop reference current value, larger than the set threshold value of current.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling using a heat medium such as water.

[0002]

2. Description of the Related Art In recent years, air conditioners and air conditioners / heaters have been widely used. FIG. 6 shows an example of the main configuration of a cooling / heating system, which is unknown and has been prototyped by the applicant. The cooling / heating device includes an indoor unit 5, an outdoor unit 7, and an outdoor unit 5. And the pipelines 34 and 35 connecting the outdoor unit 7. The indoor unit 5 supplies cold / hot air to a cooling / heating area (indoor), and includes a radiating fan 6 and a radiating heat exchanger 23.
Is cooled and heated by heat of a heat medium (for example, water) flowing through the heat radiating heat exchanger 23 when the ventilation by the rotation of the heat radiating fan 6 passes through the heat radiating heat exchanger 23. The hot air is formed so as to blow out into the room, and the heat radiating heat exchanger 23 forms a heat radiating portion that also serves as a cooling radiating portion and a heating radiating portion of the heat medium.

[0003] One end of a pipe 34 is connected to the inlet side of the heat radiation heat exchanger 23, and the other end of the pipe 34 is led to the outdoor unit 7. One end of a pipe 35 is connected to the outlet side of the heat radiation heat exchanger 23, and the other end of the pipe 35 is led to the outdoor unit 7. Is a heat radiation heat exchanger
The heat medium flowing into the heat-dissipating heat exchanger 23 flows into the pipe 35
The pipe is configured to return to the outdoor unit 7 through the pipe.

[0004] The outdoor unit 7 includes a cooling device 9 and a heating device 4.
, A pump 18, a tank 19 for storing a heat medium, switching valves 33, 36, and pipes 37, 38, 39, and the pipe 35 is connected to the tank 19. I have. Tank 19
Is connected to a pipe 37 via a pump 18, and is branched to pipes 38 and 39 at a downstream side thereof. A switching valve 36 is provided at the branch portion, and the flow of the heat medium is controlled. It is configured to switch to either the road 38 side (cooling side) or the pipeline 39 side (heating side). The pipe 38 is a cooling device 9 for cooling the heat medium.
The pipes 39 pass through the heating device 4 for heating the heat medium, and the pipes 38 and 39 join the pipe 34. At the junction, a switching valve 33 is provided, and the heat medium is transferred from the pipe 38 to the pipe.
It is configured to switch between a cooling side (pipe 38 side) flowing into the pipe 34 and a heating side (pipe 39 side) from the pipe 39 to the pipe 34.

The tank 19, the pipe 37, the pump 18, the switching valve 36, the pipe 38, the switching valve 33, the pipe 34, and the radiating heat exchanger
The cooling medium circulation path 2 is constituted by 23 and the pipe 35, and the tank 19, the pipe 37, the pump 18, the switching valve 36 and the pipe
The heating medium circulation path 3 is constituted by 39, the switching valve 33, the pipe 34, the heat radiation heat exchanger 23, and the pipe 35. As described above, the cooling medium circulation path 2 and the heating medium circulation path 3 are configured such that the indoor unit 5 side of the switching valves 33 and 36 is formed by a common pipe, and a common heat medium is circulated. When the switching valves 33 and 36 are switched to the pipeline 38 (cooling side), the heat medium is transferred from the tank 19 to the pipelines 37, 38 and 34, the radiating heat exchanger 23 and the pipeline 35 by driving the pump 18. Through the tank
When the refrigerant circulates in the cooling medium circulation path 2 returning to 19 and the switching valves 33 and 36 are switched to the pipe 39 side (heating side), the heat medium is transferred from the tank 19 to the pipe 3 by driving the pump 18.
7, 39, 34, radiating heat exchanger 23, tank 19 via line 35
It is formed so as to circulate through the heating medium circulation path 3 returning to

Then, as described above, the switching valves 33, 36
When the cooling medium is switched to the cooling side, the heat medium is cooled through the cooling device 9, and the cooled heat medium passes through the radiating heat exchanger 23 and blows cool air from the indoor unit 5.
The radiating heat exchanger 23 forms a cooling radiating section, and has switching valves 33 and 36.
Is switched to the heating side, the heat medium is heated through the heating device 4, and the heated heat medium is blown out of the indoor unit 5 through the radiating heat exchanger 23, and the radiating heat is The heat exchanger 23 is configured to switch the heat radiation heat exchanger 23 to one of the cooling heat radiation part and the heating heat radiation part by the switching operation of the switching valves 33 and 36 so as to form a heat radiation part.

The cooling device 9 functions as a cooling unit that cools the heat medium by removing the retained heat of the heat medium flowing through the pipe 38 of the cooling medium circulation path 2, and is a refrigerant (for example, water).
The refrigerant circulation system 48 includes an evaporator 44 for cooling the heat medium flowing through the pipe 38 of the cooling medium circulation path 2 by evaporation of the heat medium. The refrigerant circulation system 48 includes an evaporator 44, an absorber 45, and a regenerator.
46, a condenser 47 and lines 53, 54, 55,
The evaporator 44, the absorber 45, the regenerator 46, and the condenser 47 are connected to each other. The refrigerant circulation system 48 is provided with a water circulation path 61 passing through the absorber 45 and the condenser 47.

The internal space of the evaporator 44 is, for example, 6.5 mm.
A vacuum state of about Hg abs (absolute pressure) is maintained, and a cooling heat exchanger 22 is provided in this internal space through a pipe 38 of the cooling medium circulation path 2. A liquid refrigerant 50 (for example, water) is stored in the lower side of the cooling heat exchanger 22. In a vacuum state of, for example, 6.5 mmHabs, water as a refrigerant evaporates at a low temperature of about 5 ° C. Is cooled to about 7 ° C.

The cooling temperature of the heat medium is a predetermined cooling heat radiation temperature (the temperature of cold air blown from the indoor unit 5).
In general, the cooling heat radiation temperature is set at 7 to 10 ° C., and the evaporator 44 controls the heat medium at 7 to 10 ° C.
A vacuum is formed in its internal space so that the refrigerant that cools to 10 ° C. evaporates.

The refrigerant vapor generated in the evaporator 44 is supplied to a pipe 53
Through the absorber 45. A water circulation path 61 is passed through the internal space of the absorber 45, and a refrigerant absorbing liquid (for example, lithium bromide liquid) that takes in refrigerant vapor at the bottom side of the absorber 45.
51 is stored, and water as a cooling medium flowing through the water circulation path 61 absorbs the heat of the refrigerant vapor flowing into the absorber 45, that is, the water cools the refrigerant vapor, and this refrigerant vapor is cooled. The absorption liquid 51 takes in and absorbs. Heat is generated by the reaction of taking in the refrigerant vapor.
Absorbed in 61 water. The refrigerant-absorbed liquid diluted by the refrigerant is sent to the regenerator 46 through the pipe 54.

The regenerator 46 is provided with an absorbent heating burner 60 for heating the regenerator 46. The lean refrigerant absorbent is burned and heated by the absorbent heating burner 60, and the refrigerant in the refrigerant absorbent evaporates. -Separation occurs and the refrigerant absorption liquid is regenerated (concentrated). This regenerated refrigerant absorption liquid passes through a pipe 57,
The heat is deprived by the lean refrigerant absorbing liquid flowing through the inlet pipe 54 to the regenerator 46 in the heat exchange section, and is returned to the absorber 45. On the other hand, the refrigerant vapor generated in the regenerator 46 flows into the condenser 47 through the pipe 55.

A water circulation path 61 is passed through the condenser 47, and the refrigerant vapor flowing into the condenser 47 is deprived of heat by the water in the water circulation path 61, that is, is cooled and liquefied, and the liquid The refrigerant is returned to the evaporator 44 via the line 56.

As described above, the refrigerant evaporates in the evaporator 44 and cools the heat medium flowing through the cooling heat exchanger 22 (the pipe 38 of the cooling medium circulation path 2). Container 45,
Regenerated into liquid refrigerant via regenerator 46 and condenser 47 and evaporator
The refrigerant circulates through the refrigerant circulation system 48, such as returning to 44.

A cooling tower 62 for cooling the cooling medium by ventilation is provided in the water circulation path 61.
Usually, 31 is used to dissipate the heat of the water absorbed and retained in the absorber 45 and the condenser 47, and to allow the water to smoothly absorb the retained heat of the refrigerant vapor in the absorber 45 and the condenser 47. It is configured to cool the water to an absorption operating temperature of between 0C and 32C.

The heating device 4 includes a combustion chamber 8, a heating burner 10 provided in the combustion chamber 8, a gas supply path 11 for introducing gas to the heating burner 10, and a gas supply path 11. A solenoid valve 12 and a solenoid valve 14 for opening and closing the gas supply passage 11, a proportional valve 13 for controlling a gas supply amount to the heating burner 10 by an opening amount, and a pipe for the heating medium circulation passage 3. Road
The heat exchanger 16 includes a heat exchanger 16 provided above the heating burner 10 and a combustion fan 17 provided below the heating burner 10 to supply and exhaust air.

In the figure, reference numeral 26 denotes an outdoor unit inlet side temperature sensor for detecting the temperature of the heat medium flowing into the outdoor unit 7, and reference numeral 27 denotes a heating unit output for detecting the temperature of the heat medium flowing out of the heat exchanger 16. 30 indicates a heat-dissipating fan rotation speed detecting sensor for detecting the fan rotation speed of the heat-dissipating fan 6, 31 indicates a heat-dissipating fan airflow detecting sensor for detecting the fan airflow of the heat-dissipating fan 6, and 32 indicates a heat-dissipating fan. 3 shows an air temperature sensor that detects the temperature of the air taken into the heat radiating fan 6 by the rotation of the fan 6.

The cooling / heating device (apparatus) having the above-mentioned system configuration is usually provided with a control device 25 having a remote controller (not shown). And the like, the drive control of the pump 18, the heating control of the absorbent heating burner 60 of the cooling device 9, the heating burner of the heating device 4, etc.
It controls the operation of appliances such as the drive control of the 10 and the combustion fan 17, the rotation control of the radiating fan 6, and the switching control of the switching valves 33 and 36, and performs the cooling operation and the heating operation.

For example, during the cooling operation, the switching valve 33,
The heat medium is transferred from the tank 19 by switching the cooling device 36 to the cooling side (the pipe line 38 side), starting the cooling device 9 such as burning the absorption liquid heating burner 60 of the cooling device 9, and driving the pump 18. The heat flows into the cooling device 9 through the pipes 37 and 38 and is cooled to, for example, about 7 ° C. by the cooling operation of the cooling device 9, and the cooled heat medium is transferred to the heat-radiating heat exchanger 23 through the pipe 34. The heat is conveyed and cools the ventilation of the radiating fan 6 (absorbs the heat of the ventilation), and the cool air blows out to the cooling area (room) to perform cooling of the room. Then, the heat medium that has absorbed the ventilation heat (cooled and radiated heat) is returned to the outdoor unit 7 via the pipe 35, cooled by the cooling device 9, and sent to the indoor unit 5 again. As described above, while the heat medium is circulated in the cooling medium circulation path 2, the cooling of the cooling area is performed by repeatedly performing the cooling and the heat radiation of the heat medium (absorption of heat of ventilation).

The control device 25 is provided at an appropriate place as required, such as provided in the outdoor unit 7, provided in the indoor unit 5, or provided separately from the outdoor unit 7 and the indoor unit 5. Further, the temperature of the air taken into the radiating fan 6 is low.
When it is considered that the room temperature is substantially equal to the room temperature in the heating area, the air temperature sensor 32 may be configured to also serve as the room temperature sensor without providing the room temperature sensor separately from the air temperature sensor 32 shown in FIG.

FIG. 5 shows an example of the main configuration of a cooling device system prototyped by the present applicant, and this cooling device is also unknown. Note that, in the same figure, the same reference numerals are assigned to the same parts as those of the cooling / heating unit shown in FIG. The air conditioner shown in FIG. 5 has a configuration in which the heating device 4 side is omitted in the air conditioner / heater shown in FIG.
The heating medium circulation path 3 and the switching valves 33 and 36 are omitted, and the pipe line 38 of the heating medium circulation path 3 is directly connected to the pump 18. Further, in this appliance, the heat radiation heat exchanger 23 of the indoor unit 5 forms a cooling heat radiation part.

Also in this cooling device, the control device 25 controls the heating of the burner 60 for heating the absorbing liquid of the cooling device 9 to perform the cooling operation of the cooling device 9, and the cooling operation causes the cooling medium circulation path. The heat medium circulating in 2 is cooled,
The cooled heat medium allows the radiating fan 6 of the indoor unit 5 to operate.
Is cooled, and cooling in the cooling area is performed.

[0022]

In order to smoothly cool the heat medium circulating in the cooling medium circulation path 2 in this type of air conditioner or air conditioner / cooler / heater, a refrigerant circulation system 48 is required.
It is necessary to perform the circulation operation of the water smoothly, and for that purpose, it is important that the circulation operation of the water circulation system 61 that absorbs and radiates the heat obtained by the evaporation of the refrigerant in the refrigerant circulation system 48 can be performed smoothly. .

However, as is well known, water contains substances such as calcium and magnesium, and these calcium and magnesium generally precipitate as scales and silica (SiO ₂ ) contained in water precipitates. Is common. For this reason, it is conceivable that these precipitates adhere to and grow on, for example, the inner wall surface of the water circulation path 61. In such a case, the flow of the water flowing through the water circulation path 61 deteriorates.

Then, the operation performed by the water flowing through the water circulation path 61, that is, the operation of absorbing and releasing the heat of the vapor in the refrigerant circulation system 48 (the heat absorption of the refrigerant vapor in the absorber 45 and the condenser 47, etc.) ), And ultimately,
For example, a problem may be considered in which crystallization of the lithium bromide liquid used as the refrigerant absorbing liquid 51 causes crystallization of the cooling device 9.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air conditioner having a so-called absorption type cooling unit for absorbing and cooling heat of a heat medium by evaporating a refrigerant. It is an object of the present invention to provide a cooler that can smoothly perform a cooling operation by a cooling unit and that can prevent a failure of the device.

[0026]

Means for Solving the Problems To achieve the above object, the present invention provides means for solving the problems by the following constitution. That is, in the present invention, a cooling medium circulation path through which the heat medium circulates is provided, and the cooling medium circulation path takes in the heat retained in the heat medium and cools the heat medium. The cooling medium is circulated through a cooling radiator that absorbs the heat of the air into the heat medium and supplies the cooled air to the cooling area.The cooling unit includes an evaporator that cools the heat medium by evaporating the refrigerant and the evaporator. Refrigerant circulation system including an absorber that absorbs the steam generated by the cooler with the cooling absorbing liquid, and a regenerator that separates the steam by heating the cooling absorbing liquid that has absorbed the vapor with the burner for heating the absorbing liquid to separate the steam and regenerate the cooling absorbing liquid The refrigerant circulation system is provided with a water circulation path for absorbing and radiating heat obtained by evaporation of the refrigerant, and electrodes are provided in the water circulation path with an interval therebetween. The electrodes are arranged facing each other, and An electrode driving unit for applying pressure, a current detection sensor for detecting a current flowing between the electrodes, and comparing the detection current of the current detection sensor with a predetermined current setting threshold, and detecting the detected current with a current setting threshold or more. In this case, a cooling control unit is provided for reducing the amount of combustion heat of the burner for heating the absorbent to reduce the cooling efficiency of the heat medium by the cooling unit.

Further, a cooling stop reference current value larger than the current setting threshold value is provided, and the cooling control unit determines that the combustion of the absorbent heating burner is performed when the current detected by the current detection sensor is equal to or greater than the cooling stop reference current value. Is stopped, and the cooling by the cooling unit is stopped, which is a characteristic configuration of the present invention.

In the present invention having the above-described structure, electrodes are arranged opposite to each other with a space therebetween in a water circulation path provided in the refrigerant circulation system, and an AC voltage is applied to the electrodes by an electrode driving unit. You. Then, an alternating current (polarity reversal current) flows between the electrodes due to the AC applied voltage, and the inertia energy when the scale or the like is reversed by the polarity reversal switching breaks the bonds between the molecules such as the scale. Since the scale and the like become very small and are dissolved in water, the generation of the scale and the like is reduced and suppressed.

Therefore, the occurrence of scale and the like can be reduced.
By the suppression, the flow of water circulating in the water circulation path is performed almost without interruption, and the water smoothly absorbs and radiates heat obtained by evaporation of the refrigerant in the refrigerant circulation system. Thereby, the cooling operation of the refrigerant by the cooling unit is performed smoothly.

When the scale components and the like in the water are concentrated, the electric conductivity of the water increases. With the increase of the electric conductivity, the electric current flows between the electrodes arranged in the water and opposed to each other with an interval therebetween. The current also increases in accordance with the increase in the electric conductivity. Therefore, in the present invention having the above configuration, the enrichment state of scale components and the like in the water in the water circulation path is detected by detecting the current flowing between the electrodes when the voltage between the electrodes is kept constant by the current detection sensor. Is done. Then, the cooling control unit compares the current detected by the current detection sensor with a predetermined current setting threshold value, and when the current detection value is equal to or greater than the current setting threshold value, the cooling device absorbs refrigerant vapor in the refrigerant circulation system. Control is performed to reduce the amount of combustion heat of the absorbent heating burner that heats the absorbent to reduce the heat medium cooling efficiency of the cooling unit.

For this reason, as described above, even though the generation of scale components and the like in water is reduced or suppressed by the drive of the electrodes (application of an AC voltage) as described above, the scale components are concentrated only by the drive of the electrodes. Even if the flow in the water circulation path is slightly deteriorated without completely preventing scale precipitation and the like caused by the above, at this time, the cooling medium is controlled by the cooling medium by the combustion control of the absorption liquid heating burner by the cooling control section. Because control to reduce the cooling efficiency is performed,
Even when the heat generated by the evaporation of the refrigerant in the refrigerant circulation system is reduced, and the flow of water in the water circulation path is slightly deteriorated, the heat generated by the evaporation of the refrigerant is sufficiently absorbed and dissipated. Therefore, since the heat generated by the evaporation of the refrigerant in the refrigerant circulation system is not sufficiently absorbed and dissipated, it is possible to prevent, for example, the crystallization of the cooling absorption liquid from causing the failure of the cooling unit. Thus, the above problems are solved.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same reference numerals are given to the same parts as those of the cooling device and the cooling / heating device described so far, and the overlapping description will be omitted.
FIG. 1 shows a main configuration of a cooling unit according to an embodiment of the present invention. The main system configuration of the cooling unit according to the embodiment is the same as the main system configuration of the cooling unit shown in FIG. The configuration is almost the same.

The present embodiment is different from the air conditioner shown in FIG. 5 in that the electrodes 1a and 1b are opposed to each other with a space therebetween in the water circulation path 61, and the control device 25
Inside, a control circuit unique to the present invention shown in FIG. 1 is provided. This circuit includes an electrode driving unit 64 and a current value memory unit 6
6. It has a current detection sensor 69 and a cooling control unit 68.

The electrodes 1a and 1b are made of, for example, stainless steel. As shown in FIG. 2 (a), the electrodes 1a and 1b are provided inside a housing 29 made of stainless steel or the like, and the conductor 49 and the conductor 49 are shown. It is hermetically attached to the housing 29 via an insulating member. As described above, in the present embodiment, the electrodes 1 a and 1 b are unitized by the housing 29, and the connection portions 43 provided at both ends of the housing 29 are connected to the water circulation path 61 to circulate the water. It can be easily attached to the road 61. The housing 29 may be provided with a communication hole 42 as needed.

The electrode drive section 64 applies an AC voltage to the electrodes 1a and 1b to energize and drive the electrodes 1a and 1b. The AC applied voltage has an appropriate value in a voltage range of, for example, 1V to 15V. The voltage is applied to the voltage driver 64, and the voltage driver 64 applies the given AC voltage. In the present embodiment, by this energization drive, a rectangular polarity inversion voltage as shown in FIG. 2B is applied to flow a polarity inversion current between the electrodes 1a and 1b. The surface of the electrodes 1a and 1b is hardly contaminated with dirt or an oxide film, and sufficient activation energy is given to water in the water circulation path 61 to suppress or prevent deposition of scale and the like. The voltage applied between the electrodes 1a and 1b may be a voltage other than a rectangle, for example, a sine wave.

The current detecting sensor 69 detects a current flowing between the electrodes 1a and 1b, and detects a current flowing between the electrodes 1a and 1b when a low voltage is applied to the electrodes 1a and 1b from the electrode driving unit 64. The cooling current is detected and the detected current value is
Add to

The current value memory unit 66 is provided with a predetermined current setting threshold value and a cooling stop reference current value larger than the current setting threshold value.

The cooling control unit 68 includes a current setting threshold value and a cooling stop reference current value provided to the current value memory unit 66.
The detection current of the current detection sensor 69 is compared, and the combustion control of the absorbent heating burner 60 is performed. In particular,
For example, as shown by a characteristic line a in FIG.
Of when the detected current is greater than the current set threshold value R, the heat medium cooling efficiency of the absorption liquid heating burner 60 for cooling medium circulation path 2 a combustion heat by A ₁ level to reduce to a cooling device 9 A ₀ level When the detection current of the current detection sensor is equal to or larger than the cooling stop reference current value, the combustion of the absorbent heating burner 60 is stopped, and the cooling device 9 controls the heating medium in the cooling medium circulation path 2. Control to stop the cooling operation is performed.

The present embodiment is configured as described above. In this embodiment, the operation of the cooling device 9 in the cooling device shown in FIG. 5 and the cooling / heating device shown in FIG. Is performed, and the cooling medium 9 is cooled by the operation of the cooling device 9 to cool the heating medium in the cooling medium circulation path 2.
Cooling of the cooling area via the indoor unit 5 is performed.

In this embodiment, the cooling device 9
In the cooling operation by the above, in the absorber 45 and the condenser 47, the heat of the refrigerant vapor is absorbed by the water flowing through the water circulation path 61 in the same manner as in the apparatus of FIGS. The electrode 1 provided in the water circulation path 61
An AC voltage is applied between the electrodes a and 1b by the electrode driving section 64 of the control device 25. When a polarity reversal voltage as shown in FIG. 2B is applied between the electrodes 1a and 1b, a polarity reversal current having a similar shape flows between the electrodes 1a and 1b. Due to the momentary inertial energy at the time of the reversal, the bond between molecules such as scale is broken. Then, the scale or the like becomes very small and becomes soluble in water, thereby suppressing the generation (precipitation) of the scale or the like.

Further, in this embodiment, as shown in FIG. 4, for example, when the operation switch of the cooler is turned on (step 101 in FIG. 4), in step 102, the electrodes 1a,
The current detection sensor detects the current flowing between the electrodes 1a and 1b when the current driving between the electrodes 1a and 1b is performed at a constant voltage.
Done by 69. Next, in step 103, the cooling control unit 68 compares the detected current I with a current setting threshold value (for example, R in FIG. 3) predetermined in the current value memory unit 66, and the detected current I When the current is equal to or larger than the current set threshold, the process proceeds to step 104, and when the detected current I is smaller than the set threshold, the process proceeds to step 105.

When proceeding to step 105,
The combustion of the absorbent heating burner 60 is continued without changing the heat of combustion of the absorbent heating burner 60.
When the process proceeds to 4, the cooling control unit 68 reduces the amount of heat of combustion of the absorbent heating burner 60 to, for example, the _A0 level, and burns the absorbent heating burner 60. Then, the cooling efficiency of the heat medium (heat medium flowing through the pipe 38 of the cooling medium circulation path 2) cooled by the cooling device 9 is controlled to be small by the reduced combustion of the combustion heat of the absorbent heating burner 60. . During the combustion control of the absorbent heating burner 60 in steps 104 and 105, the current detection sensor 69 continuously detects the current flowing between the electrodes 1a and 1b.

Next, at step 106, the cooling control unit 68 detects the detected current I detected by the current detecting sensor 69.
Is compared with the cooling stop reference current value provided to the current value memory unit 66. When the detected current I is equal to or larger than the cooling stop reference current value, the process proceeds to step 107. When the detected current I is smaller than the cooling stop reference current value, the process proceeds to step 104.
Or return to step 103. When the detection current I of the current detection sensor 69 is equal to or more than the cooling stop reference current value and the process proceeds to step 107, the cooling control unit 68
As a result, the combustion of the burner 60 for heating the absorbing liquid is stopped, and the cooling operation by the cooling device 9 is stopped.

When the combustion control of the absorbent heating burner 60 is performed by the cooling control unit 68 as described above, the heat medium cooling efficiency of the cooling device 9 is displayed on the outdoor unit 7 or the indoor unit 5 by using a display or an alarm. A notifying device or the like for notifying the temperature is provided, and the cooling control unit 68 controls the combustion heat reduction of the absorbent heating burner 60 in step 104 in FIG. 4 and the combustion stop control of the absorbent heating burner 60 in step 107. In conjunction with the cooling device 9
The heat medium cooling efficiency may be lowered or the cooling may be stopped.

According to the present embodiment, as described above, by causing the polarity inversion current to flow between the electrodes 1a and 1b by the electrode driving section 64, the scale and the like are deposited in the water circulation path 61. The current flowing between the electrodes 1a and 1b is detected by the current detection sensor 69, and the combustion control of the burner 60 for heating the absorbent is performed based on the detected current. , Cooling device 9
Can be prevented beforehand.

That is, even if the deposition of the scale or the like is suppressed by the drive of the electric current between the electrodes 1a and 1b as described above, the deposition of the scale cannot be completely prevented. If the flow of water flowing through the circulation path 61 becomes poor, the absorber 45
There is a concern that the operation of absorbing and radiating the heat of the refrigerant vapor in the condenser 47 may not be performed sufficiently.
Circulation path of water detected by detection of current flowing between 1b
When it is determined that the enrichment of the scale component or the like has increased in accordance with the scale component enrichment state in 61, if the heat medium cooling efficiency of the cooling device 9 is reduced, the refrigerant circulation system
Since the heat generated by the evaporation of the refrigerant 50 generated at 48 becomes small, even if the flow of the water flowing in the water circulation path 61 becomes poor, the heat of the refrigerant vapor absorbed by the water in the water circulation path 61 is absorbed.・ Sufficient heat radiation. Therefore, the refrigerant circulating operation of the refrigerant circulating system 48 and the heat medium cooling operation by the cooling device 9 can be smoothly performed, and for example, crystallization of the lithium bromide liquid as the refrigerant absorbing liquid is prevented from occurring,
The failure of the cooling device 9 can be prevented.

Further, according to the present embodiment, when the detection current I detected by the current detection sensor 69 becomes equal to or larger than the cooling stop reference current value larger than the current setting threshold value, the absorption liquid heating burner 60 is controlled. In order to stop the combustion of the water, the concentration of scale components and the like in the water circulation path 61 is further increased, and the efficiency of absorption and heat radiation of the refrigerant vapor by the water in the water circulation path 61 is further reduced. When the determination is made, by stopping the cooling operation itself by the cooling device 9, it is possible to more reliably prevent the failure of the cooling device 9 or the like.

The present invention is not limited to the above-described embodiment, but can adopt various embodiments. For example, in the above-described embodiment, the current setting threshold value and the cooling stop reference current value are predetermined and given to the current value memory unit 66. However, a variable setting unit and the like for variably setting the current setting threshold value and the cooling stop reference current value are provided. The current setting threshold value and the cooling reference current value may be variably set and determined.

In the above-described embodiment, one current setting threshold is given, and when the current detected by the current detection sensor 69 is equal to or greater than the current setting threshold, the amount of combustion heat of the absorbent heating burner 60 is reduced. In addition, a plurality of current setting thresholds may be provided. For example, as shown in characteristic curve b in FIG. 3, when the detected current of the current detecting sensor 69 becomes a first current preset threshold R ₁ or more, the absorption liquid heating burner 60
Of combustion heat from A ₀ to A ₁ level (A ₀ > A
_1), the detection current of the current detecting sensor 69 is, when it becomes the first current setting threshold R ₁ second is greater than the current setting threshold R ₂ or more, the heat of combustion of the absorbent heating burner 60 A ₁
The cooling control unit 68 gradually reduces the amount of combustion heat of the absorbent heating burner 60 in correspondence with the plurality of current setting thresholds, such as reducing the level from the level to the level A ₂ (A ₁ > A ₂ ). You may do so.

When the current detected by the current detection sensor 69 is equal to or greater than the current setting threshold, instead of performing control to reduce the amount of combustion heat of the absorbent heating burner 60 to a certain level by the cooling control unit 68, As shown by the characteristic line c in FIG.
The amount of combustion heat of the absorbent heating burner 60 after the detected current has become equal to or greater than the current setting threshold may be continuously reduced.

Further, in the above embodiment, a cooling stop reference value larger than the current setting threshold is given, and the cooling control unit 68
Although the combustion of the absorbent heating burner 60 is stopped when the current detected by the current detection sensor 69 is equal to or more than the cooling stop reference current value, the setting of the cooling stop reference current value may be omitted. However, given the cooling stop reference current value,
When it is determined that the enrichment of scale components in the water circulation path 61 has become extremely high by performing the combustion stop control of the absorbent heating burner 60 by the cooling control unit 68 based on the cooling stop reference current value. If the cooling operation of the cooling device 9 is stopped by stopping the combustion of the absorbent heating burner 60, the failure of the cooling device 9 can be more reliably prevented.

Further, the electrodes 1a,
The magnitude of the AC voltage applied between 1b and the like is not particularly limited and may be appropriately set. For example, a variable setting section for the AC applied voltage is provided so that the AC applied voltage can be variably set. You may.

Further, for example, a water temperature detection sensor for detecting the temperature of water passing between the electrodes 1a and 1b is provided, and the current detected by the current detection sensor 69 is corrected based on the temperature detected by the water temperature detection sensor. You may make it.

Further, in the above embodiment, the cooling device having the system configuration shown in FIG. 1 has been described as an example. However, the cooling device of the present invention is not limited to the cooling device having the system configuration shown in FIG. A cooling device having another system configuration may be used as long as cooling of the cooling region is performed by using a heat medium and cooling of the heat medium is performed by a cooling unit having a refrigerant circulation system and a water circulation path. . Further, the present invention can be applied to, for example, a cooling / heating device having both a cooling function and a heating function as shown in FIG.

[0055]

According to the present invention, in a cooling device provided with a cooling unit for cooling the heat medium by removing heat possessed by the heat medium by evaporating the refrigerant, the heat obtained by the evaporation of the refrigerant in the cooling unit is absorbed and absorbed. By applying an AC voltage to the electrodes disposed opposite to each other with an interval in the circulation path of the radiating water, the molecules such as scale components in the water are cut off the bonds between the molecules, and the precipitation of scales and the like is suppressed. The current flowing between the electrodes is detected, and based on this current detection value, when it is determined that the current detection value has increased and the scale component enrichment in the water circulation path has increased, the heat medium cooling efficiency of the cooler is reduced. Because it is made to do, while applying the AC voltage between the electrodes to effectively suppress the deposition of scale and the like,
Even if the electrode is energized, suppression of deposition such as scale becomes insufficient, and when deposition of scale or the like is concerned,
By reducing the heat medium cooling efficiency of the cooling unit, the heat generated by the evaporation of the refrigerant is reduced, and even if the flow of water flowing in the water circulation path is somewhat deteriorated, the heat generated by the evaporation of the refrigerant is absorbed.・ Sufficient heat radiation can be achieved.

Therefore, since the refrigerant in the water circulation path does not sufficiently absorb and dissipate the heat of evaporation of the refrigerant by the water, it is ensured that, for example, the cooling absorption liquid in the cooling unit crystallizes and the cooling unit breaks down. Can be prevented beforehand.

Further, a cooling stop reference current value larger than the current setting threshold value is provided, and the cooling control unit determines that the combustion of the burner for heating the absorbent is performed when the current detected by the current detection sensor is equal to or greater than the cooling stop reference current value. According to the present invention in which the cooling by the cooling unit is stopped by stopping the cooling, the detection current of the current detection sensor becomes equal to or larger than the cooling stop reference current value, and the enrichment of scale components and the like in the water circulation path is further increased. When it is determined that the size has increased, the cooling operation by the cooling unit is continued by continuing the cooling operation by the cooling unit in that state even if scale components and the like are deposited in the water circulation path in order to stop the cooling itself by the cooling unit. Can be completely prevented.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram showing cooling of an embodiment of a cooling device according to the present invention.

FIG. 2 is an explanatory diagram showing an arrangement state (a) of electrodes provided in the embodiment, and an example (b) of a drive voltage to the electrodes and a polarity reversal current generated by the voltage.

FIG. 3 is a graph showing an example of controlling the amount of heat of a burner for heating an absorbent by a cooling control unit in the air conditioner according to the present invention.

FIG. 4 is a flowchart showing an example of the operation of the air conditioner of the embodiment.

FIG. 5 is an explanatory diagram showing a system configuration of an example of a cooler previously proposed by the present applicant.

FIG. 6 is an explanatory diagram showing a system configuration of an example of a cooling / heating device proposed by the present applicant before.

[Explanation of symbols]

 1, 1a, 1b Electrode 2 Cooling medium circulation path 9 Cooling device 22 Cooling heat exchanger 44 Evaporator 45 Absorber 46 Regenerator 47 Condenser 48 Refrigerant circulation system

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tatsuo Fujimoto 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd.

Claims (2)

[Claims] A cooling medium circulation path through which a heat medium circulates is provided. The cooling medium circulation path takes a heat retained in the heat medium and cools the heat medium, and a cooling section that takes in air and converts the air into air. The cooling medium is circulated through a cooling radiator that absorbs the heat of the heat medium into the heat medium and supplies the cooled air to the cooling area.The cooling unit includes an evaporator that cools the heat medium by evaporating the refrigerant and the evaporator. The refrigerant circulating system includes an absorber that absorbs the steam generated by the cooling absorption liquid, and a regenerator that separates the steam by heating the cooling absorption liquid that has absorbed the vapor with an absorption liquid heating burner to regenerate the cooling absorption liquid. It is provided connected,
The refrigerant circulation system is provided with a water circulation path that absorbs and radiates heat obtained by evaporation of the refrigerant.In the water circulation path, electrodes are arranged to face each other with an interval therebetween. An electrode driving unit that applies an AC voltage to the electrodes; a current detection sensor that detects a current flowing between the electrodes; and a detection current that is detected by comparing the detection current of the current detection sensor with a predetermined current setting threshold. A cooling unit configured to reduce the amount of combustion heat of the burner for heating the absorbent when the temperature is equal to or greater than a set threshold value, thereby reducing the efficiency of cooling the heat medium by the cooling unit. 2. A cooling stop reference current value greater than a current setting threshold value is provided, and the cooling control unit performs combustion of the absorbent heating burner when a detection current of the current detection sensor is equal to or greater than the cooling stop reference current value. The air conditioner according to claim 1, wherein the air conditioner is stopped to stop cooling by the cooling unit.