JPH02171558A - Heater and cooler with heated refrigerant - Google Patents

Abstract

PURPOSE:To simplify a refrigerant circuit, reduce the number of brazing locations and decrease a manufacturing cost by a method wherein a refrigerant heater and a radiator are arranged within an outdoor heat exchanger. CONSTITUTION:An outdoor heat exchanger 1 is constructed such that a refrigerant heater 6 for heating refrigerant within tubes 4 with a heat source 5 partly within a heat exchanger connected by a plurality of tubes 4 between a lower stage header 2 and an upper stage header 3, a radiator 7 to be utilized when the heat exchanger formed at the other region are arranged and integrally configured. Heat insulating shutters 20 and 21 are arranged at both surfaces of the radiating means 7, and the shutters 20 and 21 are opened or closed by a winding device 25 through a lever 22 and idlers 23 and 24, respectively. In case of heating operation, in order to prevent refrigerant heat from being radiated from both surfaces of the radiator 7, the winding device 25 is rotated in a reverse direction and then the heat insulating shutters 20 and 21 may close both surfaces of the radiator 7. The outdoor heat exchanger is integrally formed with the refrigerant heater and the radiator and further both surfaces of the radiator is provided with the heat insulating means, so that the components are reduced, the number of brazing locations is reduced and a manufacturing cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating/cooling machine that combines heating means and cooling means of a refrigerant heating type that performs space heating by heating a refrigerant from an external heat source such as oil or gas.

BACKGROUND OF THE INVENTION Conventionally, this type of heating/cooling machine has been configured with a heating/cooling circuit as shown in FIG. A heating forward refrigerant circuit which is sequentially connected to the valve 4, the indoor heat exchanger 5, the second check valve 6, the receiver 7, the third check valve 8, and the heating H2;
A heating device was constituted by a heating refrigerant control device configured by connecting the refrigerant heater 2 and the receiver 7 with a first electromagnetic valve 9. The cooling device also includes a compressor 10, a fourth reverse valve 11, the four-way valve 4, an outdoor heat exchanger 12, a fifth check valve 13, the refrigerant heater 2, the first electromagnetic valve 9, the receiver 7, A second electromagnetic valve 14, an expander 15 composed of a capillary tube, the indoor heat exchanger 5, and the four-way valve 4
, the accumulators 16 of the compressor 10 were successively connected. Therefore, the outdoor heat exchanger, which is normally used during cooling operation, is not used during heating operation. For this reason, during heating operation, refrigerant accumulates inside the outdoor heat exchanger, resulting in a shortage of refrigerant in the main refrigerant circuit, resulting in problems such as low heating capacity or abnormal overheating of the refrigerant in the heater. Ta. Also, when falling asleep,
When cooling operation starts, the lubricating oil inside the compressor is blown out at once, but because it flows through the outdoor heat exchanger to the refrigerant heater and receiver, it accumulates in these component parts and is difficult to recover. At the same time, there was a problem in that the lubricity of the compressor decreased, which affected its durability.

Problems to be Solved by the Invention Outdoor heat exchangers during heating operation are unnecessary parts and have poor operating efficiency, which is a factor in increasing costs. This often had a negative effect on recovery characteristics.

Therefore, the first object of the present invention is to reduce the number of refrigerant circuit components and to obtain a heating/cooling machine having a simple refrigerant circuit configuration.

The second purpose is to reduce material costs by simplifying the refrigerant circuit configuration.
The aim is to reduce manufacturing costs.

Means for Solving the Problems In order to achieve the first and second objects, the present invention utilizes a part of the outdoor heat exchanger as a refrigerant heater, and uses the other area as a radiator during cooling. The heat dissipation function and refrigerant heating function are installed inside the outdoor heat exchanger to simplify the configuration.
In addition to simplifying the refrigerant circuit, we also reduced the number of brazing locations, reducing component costs and manufacturing costs.

Function The refrigerant heating heating/cooling device of the present invention has a structure in which the outdoor heat exchanger has a refrigerant heating function and a heat dissipation function in an integrated manner due to the above structure, and since there are few connections with piping, the circuit structure is first of all simple. During operation, the outdoor heat exchanger functions as a refrigerant heater, and unlike conventional systems, there is no accumulation of refrigerant in the outdoor heat exchanger, and there is no shortage of refrigerant in the main refrigerant circuit during operation. It is operated with the appropriate amount of refrigerant. Moreover, since the refrigerant circuit is a simple circuit, even if the oil in the pressure 11 Li is once discharged, the recovery performance is highly improved. Therefore, the advantage of high system reliability is also obtained.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In Figure 1, ■ indicates the ladder 2 to the lower stage and the upper header 3.
In a heat exchanger connected by a plurality of finned tubes 4, a part of the heat exchanger is provided with a refrigerant heater 6 that heats the refrigerant in the tubes 4 by means of a heat source part 5, and a heat radiator formed in the other region. An outdoor heat exchanger integrated with a circuit 7, which includes the outdoor heat exchanger 1, a four-way valve 8, an indoor heat exchanger 9, a first reverse valve IO, a receiver 11, a second check valve 12, and the above-mentioned A heating forward refrigerant circuit sequentially connected to the lower header 2 of the outdoor heat exchanger l, the receiver 11, and the outdoor heat exchanger! a device 1
A heating means constituted by a heating refrigerant control circuit which connects the ladder 3 to the upper stage by a first electromagnetic valve 13, and a pressure 1i1 machine 14.
, a third reverse valve 15, and an upper header 3 of the outdoor heat exchanger l.
, the lower header 2, the second electromagnetic valve 16, the expander 17 constituted by a capillary tube, the indoor heat exchanger 9, the four-way valve 8, and the accumulator 18 of the compressor 14 are sequentially connected to provide cooling in the forward direction. a cooling means consisting of a circuit, the pressure 11 machine 14, the third check valve 15, the four-way valve 8,
The indoor heat exchanger 9, the first check valve 10, the receiver 11, and the third electromagnetic valve 19 are connected in sequence to form a refrigerant recovery means, which constitutes a refrigerant heating heating/cooling machine.

FIG. 3 shows an embodiment of the heat insulating means for the main parts of the outdoor heat exchanger shown in FIG. 1. A heat exchanger connected by a plurality of tubes 4 between the lower header 2 and the upper header 3 includes a refrigerant heater 6 that heats the refrigerant in the tubes 4 using a heat source section 5, and another area. The outdoor heat exchanger 1 is integrated with a heat radiator 7 that is used for cooling the heat exchanger, and the heat radiator 7 is provided with heat insulating shutters 20.2 on both sides of the heat radiator 7. The gloss 20.21 consists of a heat insulating means having the function of opening and closing the heat insulating shank 20.21 by means of a winding device 25 via a lever 22 and an idler 23.24.

Next, the operation of the configuration of this embodiment will be explained.

First, the function of the heating means will be explained. Refrigerant heater 6
The high-temperature, high-pressure refrigerant heated by the gas-liquid two-phase refrigerant rises in the same manner as the lifting force of the bubble pump, flows to the upper stage through the ladder 3, along the heating forward circuit, and is heated by the indoor heat exchanger 9. It becomes a low-temperature liquid refrigerant due to the condensation effect due to heat radiation,
This returns to the receiver 11 via the first check valve 10.The liquid refrigerant in this receiver is caused by the pressure difference between the upper header 3 and the lower header 2 at the same time as the first solenoid valve 13 is opened at regular intervals. It flows into the lower header 2 for balance through the second check valve 12 and is reheated by the refrigerant heater 6. At the same time, by the opening operation of the first electromagnetic valve 13 of the heating refrigerant control means, it flows from the upper header 3 to the receiver. The high-temperature superheated gas flowing into the receiver 11 is further condensed by the low-temperature liquid refrigerant flowing from the indoor heat exchanger 9 through the first check valve lO at the same time as the first electromagnetic valve 13 is closed. pressure decreases.

Therefore, the refrigerant pressure difference between the receiver 11 and the indoor heat exchanger 9 works in the direction of widening, so that the liquid refrigerant flows strongly into the receiver 11 in the same way as when it is pumped by the compressor, and at the same time, the When the first electromagnetic valve 13 is opened again, the refrigerant flows into the refrigerant heater 6 and is reheated, and the high temperature and high pressure refrigerant circulates along the heating refrigerant forward circuit, reaches the indoor heat exchanger 9, and heats the room.

Next, the function of the cooling means will be explained.

The refrigerant compressed by the compressor 14 is passed through a third check valve 15,
It falls from the upper header 3 of the outdoor heat exchanger to the lower header 2, passes through the second solenoid valve 16 and the expander 17, and then reaches the indoor heat exchanger 9.
The air flows into the room, is evaporated by heat absorption from the room, and circulates again along the four-way valve 8, the compression a 14, and the cooling forward circuit.

Next, the operation of the refrigerant recovery means will be explained. At the time of startup, the refrigerant in the receiver 11 may be in a gaseous state, and may particularly accumulate in the indoor heat exchanger 9. In this case - Dan,
The third solenoid valve 13 of the refrigerant recovery means is opened, the compressor 14 is operated, and not only the gas refrigerant in the receiver 11 but also the liquid refrigerant in the indoor heat exchanger 9 is removed from the first check valve 10 and the receiver it.
After the refrigerant recovery means operates so as to suck up the liquid refrigerant through the third electromagnetic valve 13, the four-way valve 8, and the accumulator 18 and keep the liquid refrigerant in the receiver II, the heating refrigerant control means is operated again as described above. It is supposed to operate so that the heating operation is activated depending on the operation.

Next, the function of the heat insulating means of the outdoor heat exchanger will be explained.

In order to prevent refrigerant heat from being radiated from both sides of the outdoor heat exchanger 1 and the radiator 7 to the outside air during heating, the winding device 2 is installed.
5 is operated in reverse, and lever 2 passes through idler 23 and 24.
2, the heat insulating shacks 20, 21 close both sides of the radiator 7. Further, during cooling, the winding device 25 is operated normally, and an opening operation for opening both sides of the radiator 7 is performed via the lever 22. This configuration solves the problem that during heating, the high-temperature refrigerant that has been heated by the refrigerant heater 6 radiates heat from the radiator 7, resulting in less heat being radiated from the indoor heat exchanger 9 (which results in insufficient heating capacity). are doing.

Effects of the Invention As described above, since the outdoor heat exchanger is constructed by integrating the refrigerant heater and the radiator, and further includes heat insulating means on both sides of the radiator, l) the number of component parts is reduced and the cost is reduced. Become cheap.

2) There are few brazed parts and manufacturing costs are low.

3) The problem of refrigerant shortage in the main circuit due to accumulation in the outdoor heat exchanger during heating is solved.

4) During cooling, the compressor starts operating when it is asleep, and the discharged refrigerant and oil are configured to flow down from the upper header of the outdoor heat exchanger without passing through the receiver, so oil recovery characteristics are high and the heater , oil accumulates in the receiver,
The problem of lack of oil in the pressure jiIia is also solved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a refrigerant heating/cooling unit according to an embodiment of the present invention, Fig. 2 is a block diagram of a heat insulating means of an outdoor heat exchanger of the refrigerant heating/cooling unit, and Fig. 3 is a block diagram of a conventional refrigerant heating/cooling unit. It is a block diagram of an air conditioner. l... Outdoor heat exchanger, 2... Ladder to lower stage, 3... Upper header, 6... Refrigerant heater, 7...・Radiator, 8...Four-way valve,
9... Indoor heat exchanger, 10... First check valve, 11... Receiver, 12... Second check valve, 13... ...First solenoid valve, 14...
...Compressor, 15...Third check valve, 16...
...Second train! 1g valve, 17... Expander, 19
...Third solenoid valve, 20.21... Heat insulation shutter, 25... Winding device.

Claims (2)

[Claims] (1) An outdoor heat exchanger, a four-way valve, an indoor heat exchanger, a first check valve, a receiver, which integrates a refrigerant heater and a standstill device,
A second check valve, a heating forward refrigerant circuit sequentially connected to the refrigerant heater, and a heating refrigerant control circuit connected between the receiver and the outlet of the outdoor heat exchanger by a first electromagnetic valve. and a cooling forward circuit sequentially connected to a compressor, a third check valve, the outdoor heat exchanger, a second solenoid valve, an expander, the indoor heat exchanger, the four-way valve, and the accumulator of the compressor. the cooling means, the compressor, the third check valve, the indoor heat exchanger, the first check valve, the receiver, the third solenoid valve, the four-way valve, and the accumulator of the compressor, connected in sequence. A refrigerant heating heating/cooling machine comprising a refrigerant recovery means. (2) The refrigerant-heating heating/cooling system according to claim (1), wherein the outdoor heater is configured by integrating a refrigerant heater and a radiator with a heat insulating means for thermally insulating the radiator from outside air. Machine.