JPS586368A - Heater for refrigerant of air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an air conditioner equipped with a refrigerant heating device. To realize a refrigeration cycle that can be attached to the refrigeration cycle of a separate type air conditioner exclusively for cooling, or attached to the refrigeration cycle of a newly installed separate type air conditioner exclusively for cooling, to enable heating operation in the winter as well as cooling operation in the summer. The purpose is to

Conventionally, a separate heat exchanger such as a hot water coil is attached to the indoor unit of a separate cooling air conditioner to enable heating operation using a separate cooling air conditioner. The structure was such that piping for sending hot water to this hot water coil was installed to perform heating operation.

Therefore, it was necessary to carry out internal construction work.

On the other hand, things that enable both cooling and heating operations include:
There are air conditioners that function as air conditioning/heating systems, but the heating method of these air conditioners absorbs heat from the air outside the room, so when the outside temperature drops, the amount of heat absorbed from the outside air decreases and the heating capacity decreases. It has its drawbacks.

The present invention eliminates the drawbacks of the conventional technology described in -F, and makes it possible to perform heating operation using a separate type cooling-only air conditioner by simply installing a refrigerant heater unit and at a low outside temperature. Even in this case, it is possible to obtain a separate type air conditioner for both cooling and heating without a decrease in heating capacity.

Hereinafter, the accompanying drawings showing one embodiment of the present invention are shown in Figs.
This will be explained with reference to FIG.

First, the refrigeration cycle will be explained with reference to FIG.

In FIG. 1, 1 indicates an indoor unit, and 2 indicates an outdoor unit. 3 is a compressor, 4 is an outdoor heat exchanger, 6 is a pressure reduction mechanism, and 6 is an indoor heat exchanger.
The refrigeration cycle of the well-known separate type cooling-only air conditioner is constructed by connecting them in an annular manner via the . 7
, 8 and 10 are on-off valves, respectively, and the on-off valves 8 and 10 are provided in the path pipes 81L and 10a. 9 is a check valve that regulates the flow direction of the refrigerant in the refrigeration cycle.

Next, the refrigerant heater unit will be explained with reference to FIG.

In the figure, 12 is a refrigerant heater unit, 13 is a pressure reducing mechanism for refrigerant heating operation, 14 is a heat source for refrigerant heating, 16 is a refrigerant heating device such as a boiler, and 16 is an on-off valve. Piping connectors 12a and 12b are provided so that they can be attached to the low pressure side of the separate air conditioner for cooling.

In the above configuration, when performing heating operation by refrigerant heating using the refrigerant heater unit 12 in winter, the refrigerant heater unit 12 is arranged in the refrigeration cycle as shown in FIG. The valve 1° is opened and the on-off valve 16 is controlled to be closed.

Therefore, since the on-off valve is closed, the refrigerant discharged from the compressor 3 passes through the on-off valve 10 without passing through the outdoor heat exchanger 4, and radiates heat and condenses in the indoor heat exchanger 6.
Since the on-off valve 16 is closed, the pressure is reduced in the pressure reducing mechanism 13 for refrigerant heating operation, and the refrigerant pressure decreases.
It constitutes a refrigeration cycle for a refrigerant heating operation in which the refrigerant is heated by the refrigerant heating device 16, receives and absorbs heat, and returns to the compressor 3. The refrigeration cycle in this case is a conventional outdoor heat exchanger 4. The pressure reduction mechanism 6 is not used.

Therefore, if you want to perform heating using a separate type cooling-only air conditioner, simply use the refrigerant heater unit 1.
By simply attaching 2 to the refrigeration cycle of the above-mentioned separate type air conditioner for cooling, heating operation can be easily performed without any problems such as adding piping or reducing capacity at low outside temperatures as in the past. can. Furthermore, since the bypass circuit 8a is open at this time, refrigerant does not accumulate in the outdoor heat exchanger 4. For normal cooling after installing the refrigerant heater unit 12, open the on-off valve 6 of the refrigerant heater unit 12, close the on-off valves 8 and 10, open the on-off valve 7, and operate the compressor 3. , the refrigerant is transferred from the compressor 1 to the outdoor heat exchanger 4. Check valve9. Pressure reduction mechanism 6, indoor heat exchanger 6. Open/close valve 1
6. It flows through a cycle such as compressor 3, and performs a predetermined cooling operation.

In this embodiment, even if the on-off valves 7 and 1o are replaced with a three-way valve 11 as shown in FIG. 4, a similar cycle can be obtained and the same effect can be obtained. It is also possible to use the refrigerant heating device 16 as a refrigerant circuit without attaching the valve 16 and the pressure reducing mechanism 13 to provide a cooling cycle.

As is clear from the second embodiment, the refrigerant heating device for an air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, and a bypass connected in parallel with the outdoor heat exchanger and equipped with a flow path switching valve. An outdoor unit consisting of a circuit and an indoor unit equipped with an indoor heat exchanger that constitutes a refrigeration cycle together with the outdoor unit are connected via a piping connection, and the low-pressure piping of the refrigeration cycle is connected to and disconnected from the piping connection. a refrigerant heater unit with possible connections, comprising a boiler through which suction refrigerant to the compressor flows and a heating source for heating the boiler, and further configured to open the bypass circuit when the heating source is activated. The structure allows the refrigerant heater unit to be attached and detached at will, so heating functions can be added to the cooling-only functions as needed.
Users can freely make their own selections, and there is no need for additional piping work.Furthermore, when heating, the heating capacity does not change in response to changes in outside air temperature, providing stable heating capacity. Further, by adding a refrigerant heater unit, effects such as not complicating the freezing cycle can be obtained.

[Brief explanation of drawings]

Fig. 1 is a refrigeration cycle diagram of a cooling-only air conditioner according to an embodiment of the present invention, Fig. 2 is a piping circuit diagram of a refrigerant heater unit in the air conditioner, and Fig. 3 is an assembly diagram of the refrigerant heater unit. FIG. 4 is a refrigeration cycle diagram of a cooling-only air conditioner according to another embodiment of the present invention. 1...Indoor unit, 2...Outdoor unit, 3...Compressor, 4...Outdoor heat exchanger, 6...Indoor heat Exchanger, 7, 10...
Opening/closing valve, 12... Refrigerant heater unit, 14...
...Heat source for heating refrigerant, 16...Refrigerant heating device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure? Figure 2

Claims (1)

[Claims] Equipped with an outdoor unit consisting of a compressor, an outdoor heat exchanger, a bypass circuit connected in parallel with the outdoor heat exchanger and a tongue and a flow path switching valve, and an indoor heat exchanger that together with the outdoor heat exchanger constitutes a refrigeration cycle. A refrigerant heater unit is connected to the low-pressure piping section of the refrigerating cycle through a piping connection section, and a refrigerant heater unit having a connection fitting that can be attached and detached from the piping connection section is connected to the Consisting of a flowing boiler and a heating source that heats this boiler,
Furthermore, the refrigerant heating device for an air conditioner is configured to open the bypass circuit when the heating source is activated.