JP3310712B2 - Water-cooled 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 water-cooled air conditioner provided with a water heat exchanger.

[0002]

BACKGROUND ART One example of a conventional water-cooled air conditioner is shown in FIG. During the heating operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 enters the indoor heat exchanger 4 via the four-way switching valve 2 as shown by the dashed arrow, and the indoor air blown by the indoor blower 6 here. By radiating heat to the air, it is condensed and liquefied to become a liquid refrigerant. The liquid refrigerant is adiabatically expanded by being throttled by a throttle mechanism 5 such as an expansion valve, and then enters the water heat exchanger 3, where it evaporates by absorbing heat from the heat source water flowing through the heat transfer tube 3a. It becomes a gas refrigerant. This gas refrigerant returns to the compressor 1 via the four-way switching valve 2.

During this time, the heat source water flows into the heat transfer pipe 3a of the water heat exchanger 3 through the solenoid valve 9 and the heating water control valve 10 interposed in the water supply pipe 7, and flows through the heat transfer pipe 3a. In the process, the temperature is lowered by exchanging heat with the refrigerant outside the pipe, and then flows out through the outflow pipe 14. During this heating operation, the solenoid valve 12 is closed.

[0004] During the cooling operation, the four-way switching valve 2 is switched in the reverse manner. Thus, the refrigerant discharged from the compressor 1 passes through the four-way switching valve 2, the water heat exchanger 3, the throttle mechanism 5, the indoor heat exchanger 4, and the four-way switching valve 2 to the compressor 1 as shown by the solid arrow. Return.

During this time, the heat source water passes through a solenoid valve 12 interposed in the water supply pipe 7, a cooling water control valve 13, and a heat transfer pipe 3a of the water heat exchanger 3.
After flowing through the heat transfer tube 3a, the temperature rises by exchanging heat with the refrigerant outside the tube, and then flows out through the outflow tube 14. During the cooling operation, the solenoid valve 9 is closed.

[0006]

In THE INVENTION It is an object of the conventional air conditioner, the time of the heating operation, low in Yorri refrigerant circuit to increase or decrease the flow rate of the heat source water by heating system water valve 10
Adjust the pressure pressure, also for cooling system water valve during cooling operation 1
3 adjusts the high- pressure pressure in the refrigerant circuit by adjusting the flow rate of the heat source water.
And the characteristics of the cooling water control valve 13 are completely different. Therefore, the heating water control valve 10 and the cooling water control valve 13 are connected to the solenoid valves 9 and 12.
Was switched by opening and closing the solenoid valve 9.
And 12 and a control device for controlling these,
There has been a problem that the costs for these and their piping and wiring are increased.

[0007]

The present invention SUMMARY OF] is a which has been invented to solve the above problems, it is an Abstract of their will, functions as a condenser during cooling operation, as an evaporator during heating operation in the functional water-cooled air conditioner comprising a heat source side water heat exchanger which, the water heat exchanger for heating system water valve in the flow path of <br/> Ru heat source water to flow out from the cold tufts for system water valve in parallel And the heating water control valve senses the temperature of the heat source water.
When the temperature exceeds the minimum temperature during cooling operation,
Temperature-controlled water control valve, and heat the cooling water control valve.
Sensing the temperature of the source water and this is below the maximum temperature during heating operation
The water-cooled air conditioner is characterized in that the temperature-controlled water control valve has a characteristic of being fully closed at the time of (1).

[0008]

[0009]

[0010]

According to the present invention, in the heating operation , the heating water control is performed.
The valve senses the temperature of the heat source water flowing out of the water heat exchanger.
When it is higher than the minimum temperature during cooling operation, it is fully closed. Ma
During cooling operation, the cooling water control valve flows out of the water heat exchanger.
The temperature of the heated heat source water is detected and this is the maximum temperature during heating operation.
It is fully closed when it is less than degrees .

[0011]

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIG. A temperature-sensitive heating water control valve 16 that senses the temperature of the heat source water and automatically increases or decreases the opening in accordance with the temperature is detected in an outflow path 14 of the heat source water that has flowed out of the water heat exchanger 3. A cooling water control valve 18 is provided in parallel. Although the solenoid valves 9 and 12 are omitted, other configurations are the same as those of the conventional one shown in FIG. 5, and corresponding members are denoted by the same reference numerals.

[0014] characteristics of the heating system water valve 16 is shown in solid lines in FIG. 2, in the fully open until the water temperature is 15 ℃, water temperature above the 15 ℃
The opening degree gradually decreases as the temperature rises, the amount of water decreases, and the temperature is set to be fully closed at a minimum temperature during cooling operation, for example, 25 ° C. or higher.

On the other hand, the characteristic of the cooling water control valve 18 is shown by a broken line in FIG.
Until the water temperature rises from 30 ° C.
Gradually opening water is increased larger, is set so as to run through the maximum amount of water becomes fully open at 40 ° C. or more with
Have been. It is desirable that the minimum temperature during the cooling operation and the maximum temperature during the heating operation are set so that there is a large difference between them.

However, the cooling water control valve 16 is kept fully closed during the cooling operation, and the cooling water control valve 18 is kept fully closed during the heating operation. Therefore, during the heating operation, the heating water control valve 16 reduces the amount of the heat source water in accordance with a rise in the temperature of the heat source water flowing through the heat transfer tube 3a of the water heat exchanger 3 functioning as an evaporator . Thereby, the high pressure in the refrigerant circuit is maintained almost constant. Also,
During the cooling operation, the cooling water control valve 18 increases the amount of the heat source water in accordance with the rise in the temperature of the heat source water flowing through the heat transfer tube 3a of the water heat exchanger 3 functioning as a condenser , thereby increasing the amount of water in the refrigerant circuit. The low pressure is kept almost constant.

[0017]

[0018]

[0019]

[0020]

[0021]

According to the present invention, during the heating operation, the cooling water control valve is fully closed, and the heating water control valve is connected to the water heat exchanger.
Flowing past the sensing to water heat exchanger the temperature of the heat source water flowing out
Controlling the flow rate of the heat source water, also heating system water valve is fully closed at the time of cooling operation, to sense the temperature of the heat source water-cooling tufts for system water valve flows out <br/> from the water heat exchanger water and controls the flow rate of the heat source water flowing past the heat exchanger, because that can omit the conventional solenoid valve and a control system, can be significant cost savings.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a first embodiment of the present invention.

FIG. 2 is a graph showing characteristics of a heating water control valve and a cooling water control valve of the embodiment.

FIG. 3 is a system diagram of a conventional water-cooled air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 3 Water heat exchanger 5 Throttle mechanism 4 Indoor heat exchanger 14 Outflow passage 16 Water control valve for heating 18 Water control valve for cooling

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazumi Honma 1 Nagoya Research Laboratory, Nagoya City, Nagoya City, Nagoya Research Institute (72) Inventor Tokuharu Asahina Tokuharu Nagoya City No. 1 Mitsuhishi Heavy Industries, Ltd., Nagoya Research Laboratory (56) Reference Jikken Sho 56-24370 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 13/00 F24F 11/02

Claims (1)

(57) [Claims] 1. A functions as a condenser during cooling operation, the water-cooling type air conditioner comprising a heat source side water heat exchanger during heating operation functions as an evaporator, from the water heat exchanger
The outflowing for heating the flow path of the heat source water system water valve and a cold tufts for system water valve interposed in parallel, senses the temperature of the heat source water the heating system water valve
When the temperature is above the minimum temperature during cooling operation, it will be fully closed
A temperature-sensitive water control valve with characteristics, and the cooling water control
The valve senses the temperature of the heat source water and this is the maximum temperature during heating operation.
Temperature-controlled water control valve that has the characteristic of being fully closed when the temperature is below
A water-cooled air conditioner characterized by the following.