JPS6352297B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature pulsating air conditioner, and more particularly to a cooling mechanism for a temperature pulsating air conditioner.

Conventionally, in a temperature pulsating air conditioner that has two heat exchangers, that is, a two-stage heat exchanger in a case, the temperature at the inlet and outlet of the heat exchanger is adjusted according to the air conditioning capacity of each of the two heat exchangers. The temperature difference of the cooling water and the flow rate of the cooling water were set separately. This makes piping complicated, the cooling water is wasted without fully utilizing its heat capacity, and it is difficult to maintain the temperature of the conditioned air at a predetermined value in response to fluctuations in outside temperature. Since the temperature difference between the water at the inlet and the outlet of the exchanger, that is, the temperature difference between cold and hot water, is small, a large amount of cooling water is used, which is uneconomical.

The object of the present invention is to provide a temperature pulsating air conditioner that has simple piping, uses a small amount of cooling water, and can reliably provide conditioned air at a desired temperature even when the outside temperature fluctuates.

In order to achieve the above object, the present invention includes a first heat exchanger having an inlet and an outlet for a heat medium opposite to the inlet in a case having an air inlet, A partition plate is provided to form a first air conditioning chamber between the first heat exchanger and the first heat exchanger, and on the downstream side of this partition plate, second and third air conditioning chambers each having an air outlet are configured to supply a heat medium. a second heat exchanger having an inlet and an inlet and a partition plate;
In a temperature pulsating air conditioner, a part of the partition plate belonging to the third air conditioning room is provided with a damper that periodically opens and closes an opening provided in the same part.
The outlet of the heat exchanger and the inlet of the first heat exchanger are connected to each other by a communication passage, the outlet of the first heat exchanger is connected to the outlet of the heat medium, and either the communication passage or the outflow passage is connected to the outlet of the first heat exchanger. One side is provided with a flow control valve that communicates with the other, and the communication path is provided with a flow control valve, and the flow rate of the flow divided by the flow control valve is adjusted based on the detected temperature of the first air conditioning room and the first set temperature. a flow rate control means for maintaining the temperature at the first set temperature; and a flow rate control means for controlling the flow rate at the flow rate control valve based on the detected temperature of the second and third air conditioned rooms and the second set temperature, and controlling the flow rate in the second and third air conditioned rooms. The flow rate control valve control means is configured to maintain the arithmetic mean value of the temperatures at the second set temperature.

The present invention will be described below based on drawings showing embodiments. In FIG. 1, a filter 16 is provided downstream of an air intake port 2 of a box-shaped case 1 of an air conditioner, and a first heat exchanger 9 is provided downstream of the filter 16. 9a and 9b are an inlet and an outlet for cooling water (heat medium) of the heat exchanger 9. A suction chamber 5 is formed between the filter 16 and the first heat exchanger 9. A partition plate 19 is installed horizontally downstream of the first heat exchanger 9, and a first air-conditioned room 8 is formed between the partition plate 19 and the first heat exchanger 9. Partition plate 1
On the downstream side of the heat exchanger 9, there is a second heat exchanger 9 in a direction perpendicular to the first heat exchanger 9.
A heat exchanger 15 is provided, and the second heat exchanger 15 is connected to the second heat exchanger 15 by the partition plate 19 and the case 1.
A second air conditioning chamber 6 and a third air conditioning chamber 7 having approximately the same volume are formed on both sides of the air conditioner. The partition plate 19 belonging to each air-conditioned room 6, 7 is provided with openings 20, 21 and dampers 10, 11 for opening and closing the openings. The dampers 10 and 11 are connected to a rod 13 of an air cylinder 12 via a link mechanism 14, and openings 20 and 21 are alternately opened and closed by reciprocation of the air cylinder 12. The second and third air conditioned rooms 6 and 7 are provided with outlet ports 3 and 4, respectively.
Blow fans 17 and 18 are housed inside.

A cooling water inlet passage 22 is connected to the inlet 15a of the second heat exchanger 15, and an outlet 15b of the second heat exchanger 15 communicates with the inlet 9a of the first heat exchanger 9 through a communication passage 23. Outlet 9b of first heat exchanger 9
An outflow passage 24 is connected to. A flow control valve 25 is provided in the communication path 23 . The flow rate control valve 25 is controlled by a control circuit 28 which outputs a signal to set the arithmetic mean value of the temperatures T ₂ and T ₃ of the second and third air conditioned rooms 6 and 7 to a desired second set value.
Temperature signals from thermistors 26 and 27 placed in the second and third air conditioned rooms 6 and 7 are input to the control circuit 28 . On the other hand, the outflow passage 24 is provided with a branch valve 30 that communicates with the communication passage 23 through a branch passage 29 . The flow dividing valve 30 divides the flow rate Q ₃ of the cooling water flowing through the communication path 23 into the flow rate Q 1 to the first heat exchanger 9 and the merging valve so that the temperature T ₁ of the first air conditioned room 8 becomes a desired _first set value. The flow rate is divided into _Q2 and 30. Control of this flow dividing valve 30 is performed by a signal from a thermistor 31 provided in the first air conditioned room 8. In addition, the diversion valve 30
may be provided in the communication path 23 downstream of the flow rate control valve 25.

With the above configuration, the air taken in from the inlet 2 is removed by the filter 16, passes through the first heat exchanger 9, and enters the first air conditioning chamber 8, but the air temperature in the first air conditioning chamber 8 is controlled by the thermistor. 31. Because the required flow rate of cooling water is supplied to the first heat exchanger 9 by the action of the diverter valve 30, the desired amount of cooling water is supplied even if the outside air temperature T fluctuates (for example, from 33°C to 38°C) as shown in Fig. 2. The first set temperature T ₁ (for example, 29° C.) is obtained. Next, the conditioned air enters the second air conditioning room 6 and the third air conditioning room 7 alternately from the first air conditioning room 8, but the air passing through the second heat exchanger 15 passes through the thermistors 26, 27, the control circuit 28, and the flow rate control valve. 25, the temperature is adjusted so that T ₂ + T ₃ /2 becomes the second set temperature (for example, 27°C) as described above, and the temperature becomes T ₂ or T ₃ and the air does not pass through the second heat exchanger 15. The air flows out from the outlet ports 3 and 4 as a temperature pulsating air flow. Figure 2 shows the first set temperature T ₁
This shows a state in which the temperature of the air is adjusted to a further second set temperature by the second heat exchanger 15. Further, FIG. 3 shows the change over time in the temperature of the air discharged from the outlet ports 3 and 4, with the solid line showing the airflow from the outlet port 3 and the dotted line showing the airflow from the outlet port 4.

As can be seen from the above description, since the cooling water passes through the two heat exchangers 9 and 15, the operating temperature range of the cooling water is wider than that of the conventional temperature pulsating air conditioner.

Since the present invention has the above-described configuration, it has the following excellent effects.

(a) Since the heat medium that was conventionally used only in one heat exchanger is also used in other heat exchangers, the temperature range in which the heat medium can be used is widened, and therefore the amount of heat medium used is reduced, making it economical.

(b) Piping is simpler than the conventional two-stage temperature pulsating air conditioner.

(c) Temperature pulsating conditioned air that always has the desired set temperature even when the outside temperature fluctuates can be obtained.

[Brief explanation of the drawing]

FIG. 1 shows a plan view of an embodiment of the present invention,
FIG. 2 shows a diagram showing changes in temperature of conditioned air according to the present invention, and FIG. 3 shows a temperature characteristic diagram of discharged air. 1... Case, 2... Inlet, 3, 4... Outlet, 6... Second air conditioning room, 7... Third air conditioning room, 8...
...First air conditioning room, 9...First heat exchanger, 10, 11
... Damper, 15 ... Second heat exchanger, 19 ... Partition plate, 20, 21 ... Opening, 23 ... Communication path,
24...Outflow passage, 25...Flow control valve, 30...
...Diversion valve.

Claims (1)

[Claims] 1. A first heat exchanger having an inlet and an inlet for a heat medium is provided in a case having an air inlet and facing the inlet, and a space between the first heat exchanger and the first heat exchanger is provided downstream of the first heat exchanger. A partition plate is provided to form a first air-conditioned room, and on the downstream side of this partition plate, second and third air-conditioned rooms each having an air outlet are connected to a second heat exchanger having a heat medium inlet and outlet. A temperature pulsating air conditioner, in which a damper is provided in a portion of the partition plate belonging to the second and third air conditioning chambers to periodically and alternately open and close an opening provided in the same portion. The outlet of the second heat exchanger and the inlet of the first heat exchanger communicate with each other through a communication passage, the outlet of the first heat exchanger is connected with an outlet passage for heat medium, and the communication passage and the inlet of the first heat exchanger communicate with each other. Either one is provided with a diversion valve that communicates with the other, and the communication path is provided with a flow control valve,
a diverter valve control means that adjusts the diverted flow rate in the diverter valve based on the detected temperature of the first air-conditioned room and the first set temperature to maintain the temperature of the first air-conditioned room at the first set temperature;
Flow rate control valve control means that adjusts the flow rate in the flow control valve based on the detected temperature of the third air conditioned room and the second set temperature, and maintains the arithmetic mean value of the temperatures of the second and third air conditioned rooms at the second set temperature. A temperature pulsating air conditioner characterized by comprising: