JPH03152333A - Water-cooled air conditioner - Google Patents

Abstract

PURPOSE:To enable an amount of water to be adjusted to its most suitable range by a method wherein a less amount, a proper amount and an over amount of flowing water are discriminated, and when the less amount and the over amount are discriminated, an operation of the air conditioner is stopped and then a result of discrimination of a flowing water temperature and a flowing water amount is displayed. CONSTITUTION:A temperature sensor 31 detects an inlet water temperature of a cooling water pipe of a water heat exchanger 3 and an outlet water temperature. A water temperature amount displaying device 30 includes a water temperature amount discriminating means 32 for discriminating whether the inlet water temperature is proper or not in response to an output from the temperature sensor 31 and stopping its operation when the amount is improper, and a water temperature amount displaying device 33 for displaying a result of discrimination of the water temperature amount discriminating means 32. A less amount, a proper amount and an over amount of the inlet water temperature of a cooling water pipe in the water heat exchanger 3 are discriminated and when the discrimination is low or high, the operation is stopped. In addition, also in the event that a less amount, a proper amount and an over amount of flowing water during the operation are discriminated and when the less amount and over amount of the water are discriminated, the operation is stopped and at the same time a result of discrimination whether the flowing water temperature and the flowing water amount are proper or not is displayed. With such an arrangement, even an amatuer may adjust the water amount within the most suitable range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water-cooled air conditioner that forms a refrigeration cycle using a water heat exchanger as an evaporator or a condenser.

(Prior Art) This type of conventional air-button device, as shown in FIG.
A compressor 1, a four-way valve 2, a water heat exchanger 3, a capillary tube 4, and an air heat exchanger 5 form a well-known refrigeration cycle. In the cooling operation mode, the refrigerant circulates in the path of compressor 1 -> four-way valve 2 - water heat exchanger 3 -> cabinet reach knee 4 - air heat exchanger 5 - four-way valve 2 - compressor 1, and in the opposite direction. In the heating operation mode, the four-way valve is set so that the refrigerant circulates along the route of compressor 1 -> four-way valve 2 - air heat exchanger 5 - capillary tube 4 - water heat exchanger 3 - four-way valve 2 - compressor 1. 2 is controlled. Note that the water heat exchanger 3 acts as a condenser in the cooling operation mode, and acts as an evaporator in the heating operation mode. At this time, a high-pressure switch 6 is provided on the discharge side of the compressor 1, and a low-pressure switch 7 is provided on the suction side, so that when either one is activated, the operation is stopped to protect the compressor 1. .

In addition, in order to protect the water heat exchanger 'JSI3 from freezing during heating operation, anti-freeze 11 is installed on the cooling water discharge side. A thermostat 8 is installed to stop operation at a temperature at which freezing is predicted.

FIG. 7 shows a control circuit of this air conditioner.

Here, a compressor motor 9 constituting the compressor 1 is connected to three-phase power lines R, S, and T via an electromagnetic contactor contact 10a and an overcurrent relay 11, and a blower motor constituting the air heat exchanger 5 12 is a magnetic contactor contact 13a and a current relay?
It is connected to the three-phase power lines R, S, and T via the LI device 14. On the other hand, a four-way valve 2, an electromagnetic contactor coil 10, 13, and a relay 17.
18 are connected. In this case, the normally open contact 1 of the relay 17 is connected to the ga control power supply fF1 line connected to the three-phase power supply line R.
7a and the blower push button switch 16 are inserted in series,
Further, a series circuit of the stop push button switch 15 and the normally closed contact 18b of the relay 18 is connected in parallel to the push button switch 16 for blowing air. A relay 17 is connected to the front stage of these contact and push button switch circuits, and an electromagnetic contactor coil 13, a relay 18, an electromagnetic contactor coil 10, and a four-way valve 2 are connected to the rear stage. In addition, 1arlBW
The excitation circuit No. 17 includes a normally closed contact 14b of the current relay S14.
, normally closed contact 19b of overload relay (not shown), normally closed contact 11b of overcurrent relay 11, normally closed contact 6b of LA pressure switch 6, normally closed contact 7b of low pressure switch 7, and normally closed contact of antifreeze sensor 8 8b are inserted in series. The electromagnetic contactor coil 10 also includes a cooling push button switch 20 and a heating push button switch 21.
2 are inserted in series. Further, the four-way valve 2 is connected via a heating push button switch 21.

In FIG. 7, if the three-phase power supply voltage is established, the relay 17 is energized and its contact 17a is closed. Here, the indoor temperature rises and the room thermostat 22
While the air conditioner push button switch 20 is closed to perform cooling operation, the air blower push button switch 1 is connected to the side.
6 is momentarily closed, the relay 18 is energized and self-retained by its contacts 18a. In addition, relay 18
At the same time, electromagnetic contactor coils 10 and 13 are also excited. Therefore, the compressor motor 9 is driven by closing the electromagnetic contactor contact 10a, and the blower motor 12 is driven by opening the electromagnetic contactor contact 13a. As a result, cooling operation is performed.

During this cooling operation, when the pressure on the discharge side of the compressor 1 becomes excessive, the high-pressure switch 6 operates, and the relay 17 becomes de-energized by opening its contact 6b. Since all contactor coils 13 are de-energized, the operation is stopped +L. Similarly, when the pressure on the suction side of the compressor 1 becomes too low, the low pressure switch 7 is operated and the relay 17 is de-energized by its contact 7b, so that the operation is also stopped.

Also, if the stop push button switch 15 is momentarily opened during cooling operation, the electric appliance 18, the electromagnetic contactor coil 10,
Since all the electromagnetic contactor coils 13 are de-energized, the operation is stopped.

On the other hand, in winter, etc., when the air blowing push button switch 16 is momentarily closed while the heating push button switch 21 is closed to perform heating operation with the room thermostat 22 connected to side a, the four-way valve 2 is excited and heating operation is performed.

Even during this heating operation, if the high pressure switch 6 or the low pressure switch 7 operates, the relay 17 becomes de-energized and the operation is stopped. Also, freezing of water heat exchanger 3]'
In a situation where the freeze prevention thermometer 8 is activated and its contact 8b is opened, the relay 17 becomes de-energized and the operation is stopped.

(Problem to be Solved by the Invention) In a water-cooled air conditioner, it is required to maintain the flow rate of cooling water in the water heat exchanger 3 within an appropriate range. There is no guideline to judge whether or not it is being maintained within an appropriate range; for example, if the flow rate of cooling water becomes excessive, the loaf-in tube will be scraped and a hole will open, causing water to enter the refrigeration cycle and leaking refrigerant at the same time. leading to the situation. In addition, when the cooling water flow rate becomes zero or too low, the pressure on the discharge side of the compressor 1 increases during cooling and the high pressure switch 6 is activated, and conversely, the pressure on the suction side of the compressor 1 decreases during heating and the low pressure switch 7 is activated. or

In this case, there is a need to change the amount of cooling water depending on the water temperature, but as the number of air-cooled air conditioners has increased, there tends to be a shortage of skilled workers for water-cooled air conditioners. Trouble caused by inappropriate section 21 of cooling water m is increasing.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a water-cooled air conditioner that allows even non-experts to adjust the amount of water within an optimal range.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a water-cooled air conditioner in which a water heat exchanger is used as an evaporator or a condenser to form a refrigeration cycle. Based on a temperature sensor that detects each water temperature and the detected inlet water temperature of the water heat exchanger, it is determined whether the inflow water temperature of the water heat exchanger is too low, appropriate, or too high, and whether it is too low or too high. When the determination is made, the operation is stopped, and based on the inlet water temperature and outlet water temperature of the water heat exchanger detected during operation, it is determined whether the flow rate is too low, appropriate, or excessive, and when it is determined that the water flow is too low or too high, the operation is started The present invention is characterized by comprising a water temperature amount determining means for stopping the water temperature amount determining means, and a water temperature display device for displaying the determination results of the inflow water temperature and the flowing water amount determined by the water temperature amount determining means.

(Function) In this invention, the water temperature at the inlet of the cooling water pipe of the water heat exchanger is excessively low, appropriate, or excessively high (hereinafter abbreviated as "do", "low", "suitable", "high").
The operation is stopped when the amount of water flowing is determined to be low or high, and the operation is also stopped when the amount of water flowing is determined to be too low, appropriate, or excessive while the operation is continued. Since the judgment result of whether the water temperature and water flow rate are appropriate or not is displayed, the operation stop + 1. t1. You can easily find the cause of the problem by looking at the display, and even non-experts can adjust the water temperature to the optimum range.

(Embodiment) FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.
The same reference numerals as in the figures indicate the same elements. A water temperature total display device 30 with a temperature sensor 31 is added to the configuration shown in FIG. Here, the temperature sensor 31 detects the inlet water temperature and outlet water temperature of the cooling water piping of the water heat exchanger 3. Further, the water temperature total display device 30 determines whether the inlet water temperature and water flow rate are appropriate based on the output of the temperature sensor 31,
It includes a water temperature amount determining means 32 that shuts down the operation when it is inappropriate, and a water temperature type display 33 that displays the determination result of the water temperature state determining means 320.

FIG. 2 is a control rh circuit diagram of this embodiment, in which a water temperature amount determining means 32 is connected to the front stage of the normally open contact 17a of the relay 17, and a relay (not shown) included in this water temperature state determining means 32 is connected. The point where the contact 32b is inserted into the excitation circuit of the relay 17 is a hole in the configuration as shown in FIG. The water temperature amount determination stage 32 is comprised of a microcomputer that determines whether the water temperature and water amount are appropriate or inappropriate based on the output of the temperature sensor 31, and a relay that outputs the determination result.

3(a) and 3(b) are a front view and a side view of the water temperature total display device 30, in which a water temperature type display 33 is attached to the outer surface of the casing 34. As shown in FIG. 4, the water temperature indicator 33 includes a water inlet temperature indicator 41, a water outlet temperature indicator 42, an appropriate temperature indicator 43, an appropriate amount indicator 44, a zero water level indicator 45, and an excessive water level indicator 46. , low water level indicator light 47
, a low water temperature indicator light 48 and a high water temperature indicator light 49.

Regarding the operation of this embodiment configured as described above, which is newly added to the conventional device, the water temperature amount determining means 3
This will be explained with reference to FIG. 5, which shows the processing procedure of the microcomputer No. 2.

First, when the water-cooled air conditioner is operated, the water temperature determining means 32 takes in the signal from the temperature sensor 31 and detects the water inlet temperature and water outlet temperature (Steps 101 and 102).
, outputs a signal to display each detected temperature on the water inlet temperature indicator light 41 and the water outlet temperature indicator light 42 (step 10).
3,104).

Next, it is determined whether the water inlet temperature is below 9°C, within the range of 10 to 35°C, or above 36°C (step 105). If it is determined that the water temperature is 9 degrees Celsius or lower, the contact 32b is opened and the water temperature is determined to be low (step 1). ~108).

Further, when it is determined that the water temperature is 36° C. or higher, the operation is also stopped, the water temperature is determined to be 9, and a lighting signal for the water temperature high indicator light 49 is output (steps 109 to 111). Assuming that the water temperature is adjusted due to this operation stop (step 112) and operation is restarted, +Ij and these processes are repeated.

On the other hand, if it is determined that the water inlet temperature is in the range of 10 to 35 degrees Celsius, the appropriate temperature indicator 43 continues to output other signals (steps 113 and 114), and it is necessary to confirm that 30 seconds have passed. Step 115), then it is determined whether the difference between the water inlet water temperature and the water outlet water temperature is within ±0.5°C or 1°C or more (step 116). Here, ±0. If it is determined that the water amount is within 5° C., the water amount is determined to be zero, the operation is stopped LL, and a lighting signal for the zero water amount indicator light 45 is output (steps 117 to 119). If the lighting state of the indicator light is confirmed when the operation is stopped and the water is flushed (step 120), the operation is restarted and the above process is repeated.

On the other hand, if Z between the water inlet temperature and the water outlet temperature is determined to be less than ±1°C, please confirm that 3 minutes have passed in step 1.
21), the water inlet temperature is again in the range of 10 to 20°C, but it is determined whether it is outside these ranges (step 122).
).

Here, if it is determined that the temperature is 10 to 20℃, then the difference between the water inlet temperature and the water outlet temperature is ±7℃ or less, or the soil temperature is 8 to 14℃.
It is determined whether the temperature is within the range of .degree. C. or ±15.degree. C. or more (step 123). If the temperature is below ±7°C, the operation will be stopped, and the water quantity indicator light will be turned on when it is determined that there is too much water.
6 lighting signals are output (steps 124 to 126).

If the temperature is within the range of ±8 to 14°C, the operation is continued, the flow rate is determined to be appropriate, and a lighting signal for the appropriate amount indicator lamp 44 is output (steps 127 to 129). Furthermore, ±15
If it is determined that the water level is higher than 0.degree. C., the operation is stopped, and the water Q is determined to be too low, and a lighting signal for the low water quantity indicator lamp 47 is output (steps 130 to 132). Here, if the water amount has been adjusted (step 133), the flow rate is determined to be appropriate and a lighting signal for the appropriate amount indicator light 44 is output (step) 281
29).

Next, as determined in step 122, the water inlet temperature is 21
If it is determined that the temperature is within the range of ~35°C, it is determined whether the difference between the water inlet temperature and the water outlet temperature is ±2°C or less, ±3 to 8°C, or ±9°C or more ( Step 134). When it is determined that the temperature is below ±2°C, the operation is stopped (step 135), and the processes from step 125 described above are performed.

Further, when it is determined that the temperature is ±3 to 8° C., the operation is continued and the processing from step 128 described above is performed in step 136). Further, if it is determined that the temperature is ±9° C. or higher, the operation is stopped (step 137), and the processes from step 131 described above are performed.

In this way, when the water inlet water temperature is not appropriate or the flow rate is not appropriate, the operation is stopped and the determination result is displayed on the water temperature amount display 33.
The person in charge of construction can adjust any inappropriate points according to this display.

In addition, since operation continues only when the water inlet temperature is appropriate and the flow rate is appropriate, accidents such as holes opening in the water piping system due to excessive flow rate are eliminated, and at the same time, water is removed during heating operation. It is also possible to prevent an accident in which the heat exchanger '1it3 freezes.

Further, when the operation is stopped, the cause is displayed on the water temperature display 33, so that the water temperature and flow rate can be adjusted without using specialized construction tools.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, there is provided a temperature sensor that detects the inlet water temperature and the outlet water temperature of the cooling water piping of the water heat exchanger, and a , determines whether the inflow water temperature of the water heat exchanger is low, appropriate, or high, and when it is determined to be low or high, the operation is stopped, and the water heat exchanger inlet water temperature and outlet water temperature detected during operation are A water temperature amount determining means that determines whether the amount of water flowing is too low, appropriate, or excessive based on the water temperature amount determining means, and stops operation when it is determined that the amount of water flowing is too little or too much; Since it is equipped with a water temperature display, even non-experts can adjust the amount of water to the optimum range.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram showing the configuration of a control circuit of the embodiment, and FIG. 3(a)
, (b) is a front view and a side view of a water temperature display device constituting the same embodiment, FIG. 4 is a front view of a water temperature display device constituting the same embodiment, and FIG. 5 shows the operation of the same embodiment. FIG. 6 is a schematic diagram of a conventional water-cooled air conditioner, and FIG. 7 is a circuit diagram showing the configuration of a control circuit of the same device. 1...Compressor, 2...Four-way valve, 3...Water heat exchanger, 4...Capillary tube, 5...Air heat exchanger, 8...Anti-freeze thermo, 9...・Compressor motor,
10.13...Magnetic contactor coil, 11.14...
Overcurrent relay, 12...Blower motor, 15...Push button switch for stop, 16...Push button switch for blower, 1
7.18...Relay, 20...Push button switch for cooling, 21...Push button switch for heating, 22...Room thermometer, 30...Water temperature display device, 31...Temperature sensor, 32 ...Water temperature amount determination means, 33...Water temperature type display device.

Claims (1)

[Claims] In a water-cooled air conditioner that forms a refrigeration cycle using a water heat exchanger as an evaporator or a condenser, a temperature sensor detects an inlet water temperature and an outlet water temperature of cooling water piping of the water heat exchanger, and Based on the inlet water temperature of the water heat exchanger, whether the inflow water temperature of the water heat exchanger is too low or too low,
In addition to determining whether the water is too high, if it is determined to be too low or too high, the operation is stopped, and based on the inlet water temperature and outlet water temperature of the water heat exchanger detected during operation, the water flow rate is determined to be too low or too low.
A water temperature amount determining means that determines whether the water temperature is appropriate or excessive and stops operation when it is determined to be too little or too much, and a water temperature amount display device that displays the determination results of the inflow water temperature and the water flow rate determined by the water temperature amount determining means. A water-cooled air conditioner characterized by: