JPS6337617Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat medium circuit of a heat exchanger that circulates a heat medium to perform heating or cooling.

Conventionally, as shown in FIG. 1, heat exchanger bodies 10a, 10b, 10c, and 10d having different head heights are connected by a heat medium pipe line 20, and a heat medium is transferred to the heat exchanger bodies 10a, 10b having a lower head height. Heat medium pipe 2 that flows out
0 is provided with a resistor 30, and each heat exchanger main body 10a, 10b, 10 when in an open circuit (heating circuit).
A heat medium circuit of a heat exchanger is known that includes an open circuit and a closed circuit (cooling circuit) in parallel, which are set so that the flow rates of the heat medium in the heat medium flow rates are equal.

However, in the heat medium circuit of such a heat exchanger, during heating operation, the resistor 30 compensates for the imbalance in heat medium flow due to the difference in head between the heat exchanger bodies 10a, 10b and the heat exchanger bodies 10c, 10d. Adjustment does not result in a decrease in heat exchange effect, but since a closed circuit is used during cooling operation, the heat medium flow rate is not affected by the difference in head, and on the contrary, the resistor 30 Heat exchanger main body 10a, 10b
The disadvantage was that the flow rate of the heat medium was significantly reduced, leading to a decrease in the cooling effect.

In view of the above-mentioned drawbacks of the conventional technology, the present invention has been developed to provide a heat exchanger that maintains a uniform flow rate of heat medium in each heat exchanger body at all times, not only during heating operation but also during cooling operation, and which does not reduce the heat exchange effect. The purpose is to provide a heat medium circuit.

An embodiment of the present invention will be described below with reference to FIG. 2, in which the same components as those of the conventional example are denoted by the same reference numerals. That is, in the drawing, 10a and 10b are heat exchanger bodies with a low head, 10c and 10d are heat exchanger bodies with a high head, and 20 is a heat medium pipe connecting each of the heat exchanger bodies 10a, 10b, 10c, and 10d. 30 is a resistor provided in the heat medium pipe line 20 through which the heat medium flows out to the heat exchanger bodies 10a, 10b, and in the case of an open circuit, each heat exchanger body 10a, 1
The heat medium flow rates of 0b, 10c, and 10d are set to be equal.

40 is a three-way switching valve body attached to the heat medium conduit 20 on the heat medium inflow portion 30a side of the resistor 30;
To the resistor 30 when using an open type circuit, and to the bypass conduit 6 described later when using a closed type circuit.
The controller 50 controls the heating medium to flow out to the zero point. 60 is a bypass pipe, one end of which is connected to the valve body 40 and the other end of which is connected to the heat medium outlet portion 30b of the resistor 30.
It is connected to the heat medium pipe 20 on the side.

In addition, 70a and 70b are three-way switching valve bodies that control an open type circuit and a closed type circuit, 80 is a compressor, 81 is a condenser, 82 is an expansion valve, 83 is an evaporator, 90 is a circulation pump, and 100 is a hot water storage Tank, 101
1 is a strainer, 110 is a check valve that prevents the heating medium from flowing back, and 111 is a two-way switching valve body that controls the inflow of the heating medium.

Since the embodiment of the present invention is constructed as described above, when heat is exchanged using an open circuit (heating circuit) for the heat medium circuit of the heat exchanger, hot water is sent from the hot water storage tank 100 by the circulation pump 90. A part of the heat medium exchanges heat through the heat exchanger bodies 10c and 10d, and the other heat medium, that is, the heat exchanger bodies 10a and 1
The heat medium flowing out to the 0b side is made to flow to the resistor 30 by the valve body 40 controlled by the controller 50, and the flow rate is adjusted by the resistor 30 to each heat exchanger main body 1.
It is equal to the flow rate flowing to 0c and 10d.

In addition, when heat exchange is performed using a closed circuit (cooling circuit) for the heat medium circuit of the heat exchanger, a part of the heat medium sent out from the evaporator 83 by the circulation pump 90 is the same as in the open circuit. heat exchanger body 10c, 10
d, but other heat medium, that is, heat medium flowing out to the heat exchanger bodies 10a and 10b, is transferred to a bypass pipe by a valve body 40 controlled by a controller 50. 60, and its flow rate is not affected by the difference in head between the heat exchanger bodies 10c and 10d.
It becomes equal to the heat medium flow rate of c, 10d.

As explained above, according to the present invention, a plurality of heat exchanger bodies having different head heights are connected by a heat medium pipe, and the heat medium pipe line that flows out of the heat medium to the heat exchanger body having a lower head is resisted. In a heat medium circuit of a heat exchanger that includes an open circuit and a closed circuit, the heat medium flow rate of each heat exchanger body is set to be equal when the circuit is an open circuit. A three-way switching valve body is attached to the heat medium conduit on the inflow side, and a bypass conduit is connected to the valve body at one end and to the heat medium conduit on the heat medium outflow side of the resistor at the other end. The valve body was controlled so that the heat medium flowed into the resistor when using an open circuit and to the bypass pipe when using a closed circuit, so even if multiple heat exchanger bodies with different head When in use, it has the practical effect that the heat medium is uniformly supplied to each heat exchanger body at all times, not only during heating but also during cooling, and the heat exchange effect in the heat exchanger body is not reduced. .

[Brief explanation of the drawing]

The drawings serve to explain the present invention, and FIG. 1 is a circuit diagram showing a heat medium circuit of a conventional heat exchanger, and FIG. 2 is a circuit diagram showing a heat medium circuit of a heat exchanger according to the present invention. . In the figure, 10a, 10b, 10c, 10d... heat exchanger body, 20... heat medium pipe line, 30... resistor, 40... valve body, 50... controller, 60... bypass pipe line.

Claims (1)

[Scope of utility model registration request] A plurality of heat exchanger bodies with different head heights are connected by heat medium pipes, and a resistor is provided in the heat medium pipe line through which the heat medium flows out to the heat exchanger body with a lower head, thereby creating an open circuit. In a heat medium circuit of a heat exchanger that includes both an open circuit and a closed circuit, which are set so that the heat medium flow rate of each heat exchanger body is equal, the heat medium pipe on the heat medium inlet side of the resistor is When using an open circuit by installing a three-way switching valve body and providing bypass pipes with one end connected to the valve body and the other end connected to the heat medium pipe on the heat medium outlet side of the resistor. A heat medium circuit for a heat exchanger, characterized in that when a closed circuit is used for the resistor, the valve body is controlled so that the heat medium flows out to a bypass pipe.