KR910002288Y1 - Heat pump - Google Patents

Abstract

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Description

Heat pump type heating and cooling equipment

1 is a configuration cycle circuit diagram of a conventional apparatus.

2 is a Molieel diagram of a heating and cooling cycle of a conventional apparatus.

3 is a configuration cycle circuit diagram of the device of the present invention.

4 is a Molieel diagram of the heating and cooling cycle of the device of the present invention.

Figure 5 is an enlarged side cross-sectional view of a portion of one embodiment of the internal heat exchanger and hot water heat exchanger used in the present invention.

6 is a front view of an embodiment of an external heat exchanger of the present invention.

* Explanation of symbols for main parts of the drawings

1: external heat exchanger 2: internal heat exchanger

3: compressor 4: receiver

5: expansion valve 6, 7: first and second direction switching valve

8: hot water heat exchanger 9: moisture separator

13: automatic shutoff valve

The present invention relates to a heat pump type heating and cooling device capable of simultaneously heating and cooling, and more particularly, to a heat pump type heating and cooling device for improving the operating efficiency and supplying hot water in any operation state of heating and cooling. .

Conventional heat pump type air-conditioning apparatus driven by using various cooling heat sources such as air temperature, geothermal temperature, or well water temperature, as shown in FIG. 1, has a compressor between the external heat exchanger 1 and the internal heat exchanger 2. (4) and a receiver (4) and expansion valve (5) is operated by circulating the refrigerant, the summer heat exchanger (1) to the condenser (ie heat sink) to the internal heat exchanger (2) ) Is operated as an evaporator to cool the room and to operate in reverse during the winter season, thereby heating. This air-conditioning switching is composed of two directional valves (6, 7).

(The subscript S of the arrows not described is the cooling path, the subscript W is the refrigerant path when heating, and the arrows without the subscript are common for heating and cooling and are the same below).

However, in such a conventional heat pump type air-conditioning apparatus, as shown in the Mollier diagram of FIG. 2, the heat of condensation Q2 is higher than the heat of evaporation Q1 absorbed during evaporation. As it is large enough, the forced coolers (F1, F2), such as fans, should be installed in the external and internal heat exchangers (1, 2) to operate effectively as a condenser, in order to achieve effective condensation liquefaction. In addition, especially during cooling, the heat of condensation (Q2) must be released into the atmosphere as it is, so the operation efficiency of the device was low and the waste of energy was severe. On the other hand, even in the summer when cooling is in operation, even though hot water is required as a sanitary water for bathing, there is a problem that hot water supply is not possible with conventional devices. If the air temperature is lower than the dew point temperature, moisture in the air becomes frost on the heat exchanger fin.

Since frost contains a large amount of air, the thermal conductivity is very bad, which lowers the heat transfer action and thus lowers the evaporation temperature of the refrigerant. Therefore, the power consumption increases, and if the state is severe, it may become inoperable.

In order to prevent this, in the conventional method, a separate device (high pressure gas defrosting, sprinkling defrosting, electrothermal defrosting, etc.) is used to remove frost, which not only increases consumption power but also causes deterioration of operating efficiency.

The present invention improves the operation efficiency in view of the above-mentioned conventional problems, and optimizes the device, and allows the hot water to be heated in any case of cooling and heating by using the condensation heat discharged to the outside of the prior art. By heat-exchanging a large area heat collecting plate directly with all the heat sources (air, rain, sun, wind, etc.) in the air without any power, it absorbs heat, greatly improving the effect of frost on winter operation and improving operation efficiency. It is devised to reduce the power consumption by improving the defrosting device and the fan drive device, etc. will be described in detail based on the accompanying drawings.

The heat pump type heating and cooling device of the present invention has an external heat exchanger (1) communicating with the first and second directional valves (6, 7) having first to fourth passages, respectively, as shown in FIG. And a heat pump type and air conditioner comprising an internal heat exchanger (2), a compressor (3), a receiver (4), and an expansion valve (5), between the compressor (3) and the receiver (4). The cold water pipe 83 and the hot water pipe 84 communicate with each other to provide a hot water heat exchanger 8 for mutual heat exchange with the refrigerant, and a water separator 9 is provided on the downstream side thereof so that the gas discharge port 92 side has a first discharge port. The second passage of the direction switching valve 6, the liquid outlet port 93 side is provided in communication with the inlet port 41 side of the receiver 4 via the shut-off valve 13, respectively; A gas-liquid heat exchanger (16) communicates with the outlet (42) downstream of the receiver (4) so as to exchange heat with an upstream side of the compressor (3); Preferably, the temperature sensor 15 is installed on the hot water pipe 84 side, which is the discharge side of the hot water heat exchanger 8, to operate the automatic shutoff valve 13 through the detection pipe 14, and the gas-liquid heat exchanger 16 And a drier 17 such as a dry filter to remove water between the expansion valve 5 and the expansion valve 5, and a temperature sensor 51 behind the upstream gas-liquid heat exchanger 16 of the compressor 3. And a sensing tube 52 to adjust the expansion valve 5 and a pressure equalizing tube 53 is installed as necessary.

The present invention heat pump type air-conditioning and hot water supply device configured as described above operates as follows, and the refrigerant adiabaticly compressed at high temperature and high pressure by the compressor 3 is the first refrigerant passage 81 of the hot water heat exchanger 8. Cooled and condensed by the cold water introduced into the cold water pipe (83) to discharge the condensation heat to heat the cold water to discharge to the hot water pipe (84), flows into the inlet (91) of the gas-liquid separator (9) to condense The gaseous components which have not been provided are supplied to the second passage of the first direction switching valve 6 through the gas discharge port 92, and the condensed heat is released through the liquid discharge port 93 to discharge the condensed heat. Is supplied to the inlet (41), wherein the automatic shut-off valve 13 installed in this path is a discharge temperature of the hot water pipe 84 detected by the temperature sensor 15 is a predetermined temperature (for example, hot water required for bathing) Cooling temperature is automatically shut off when the temperature exceeds Is sent toward the room line, this automatic control is capable of cooling or heating the first way that following the cooling or heating state because it is heated first method a configuration and operation.

The above operation is common to air-conditioning, and the operation after the first direction switching valve 6 is first performed in the heating case of the winter season, and the first refrigerant passage 21 of the internal heat exchanger 2 acting as a condenser through the second and third passages. ) Is introduced into the condensation and discharges the heat of condensation to supply the amount of heat (q) of the working fluid, such as water or air supplied to the working fluid inlet (24) to discharge it to the heating working fluid outlet (23) to provide heating The liquid refrigerant is discharged into the second refrigerant passage 22 and supplied to the inlet 41 of the receiver 4 through the fourth and third passages of the second direction switching valve 7, and the liquid refrigerant having the condensation is completed. Subcooled by supplying heat to the gaseous refrigerant flowing into the gas-liquid heat exchanger 16 and returned from the external heat exchanger 1, passes through the dryer 17, removes moisture and is supplied to the expansion valve 5 to reduce the pressure External heat exchanger acts as an evaporator in an easy to evaporate state by expansion It is supplied to the second refrigerant passage 12 of (1), heat-exchanged by a heat source such as solar heat or outside temperature, absorbs evaporation heat, is evaporated and discharged into the first refrigerant passage 11, and is switched to the first direction. The amount of heat (q) is supplied from the liquid refrigerant supplied from the gas-liquid heat exchanger (16) to the expansion valve (5) via the first and fourth passages of the valve (6), and the remaining vaporized liquid component is evaporated completely. The hot water hot water supply and heating cycle is completed by vaporizing and supplying the compressor 3 in a superheated vapor state.

In the cooling of the summer, the first and second directional valves 6 and 7 switch the refrigerant path to the subscript S side, so that the external heat exchanger 1 acts as a condenser and the internal heat exchanger 2 acts as an evaporator. The heating cycle is operated in reverse, but even in this case, the hot water supply cycle in the hot water heat exchanger 8 does not change its operation, so the hot water hot water supply continues even during cooling.

3 is an embodiment in which the internal heat exchanger 2 and the hot water heat exchanger 8 used in the present invention are configured, and is configured in a double tube type to form the first refrigerant passages 21 and 81 and the second refrigerant passage 22. The working fluid pipe surrounds the outer circumference of the spiral refrigerant conduit between the two pipes, 82, and the working fluid inlet 24 or the cold water pipe 83 and the working fluid outlet 23 or the hot water pipe 84 are installed on both sides thereof. It is irrelevant to any type of shell and tube or any other heat exchanger. Especially in the case of an internal heat exchanger, if the working fluid is air, the refrigerant conduit is a capillary tube and a fan is installed to install a fan coil unit. It is also preferable to comprise.

FIG. 6 is a diagram illustrating an example of an external heat exchanger 1 used in the present invention, and a second component connected to a first distribution pipe 25 and a second refrigerant passage 12 communicated with the first refrigerant passage 11. Branched between the pipes 26, and is installed by communicating with the capillary tube 27 is fixed on the heat transfer plate 28, such as a fixed fixture or a fixture 29, such as a fixed plate, the heat transfer plate 28 of the capillary tube 27 It is preferable to construct a large contact area because it serves to expand the heat transfer area. It is formed of a material with good thermal conductivity such as copper plate or aluminum plate, and is manufactured by roll bond processing of aluminum to prevent efficiency decrease by contact area. It is preferable that the external heat exchanger 1 is installed vertically with respect to the ground because it serves as a heat sink as well as a heat collecting plate.

The heat pump type air-conditioning and hot water supply device configured as described above is operated as a cooling device in the summer, and is not only discharged to the outside as waste heat, but also without additional power consumption by using condensation heat that consumes additional power for the discharge. Hot water can be heated and heated to have a great effect on energy saving.

In addition, the heat quantity q moves from the upstream side of the expansion valve (i.e., the end state of the condensation stroke) to the upstream side of the compressor (i.e., the end state of the evaporation stroke) in the liquid heat exchanger. As it is made of supercooling and overheating, the freezing effect is improved from Q1 to Q1 + 2q and the grade factor is improved from Q1 / W to (Q1 + 2q) / W, compared to the conventional refrigeration cycle shown in the second. Significantly improved, reducing power consumption and minimizing the equipment capacity of the device.

Claims (2)

It consists of an external heat exchanger 1 and an internal heat exchanger 2 communicating with the first and second valves 6 and 7, a compressor 3, a receiver 4, and an expansion valve 5. In the heat pump type air-conditioning unit having a hot water heat exchanger (8) and a gas-liquid separator (9), the gas-liquid heat exchanger (16) which is heat-exchanged mutually on the downstream side of the receiver (4) and the downstream side of the compressor (3). Heat pump type cold, characterized in that for installing. Heating and hot water supply. According to claim 1, wherein the external heat exchanger (1) between the first distribution pipe 25 communicated to the first refrigerant passage (11) and the second distribution pipe (26) communicated to the second refrigerant passage (12) Heat pump type cold, heating and hot water supply device characterized in that the branched from the first and second distribution pipe (25, 26) is connected to the capillary (27) in contact with the heat transfer plate (28).