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Air-conditioner

An air conditioner and air conditioning technology, applied in air conditioning systems, space heating and ventilation, heating methods, etc., can solve problems such as difficulty in condensing temperature, insufficient heating capacity, and inability to obtain condensing temperature.

Inactive Publication Date: 2007-03-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the influence on the indoor unit 102 that can output at a low condensation temperature is large, and even if a high hot water temperature is set, the necessary condensation temperature cannot be obtained in the intermediate heat exchanger 121.
[0015] In addition, in the air conditioner shown in FIG. 6, since the condensation temperature of the intermediate heat exchanger 205 is generally lower than the condensation temperature of the first use-side heat exchanger 203 as an indoor unit under the same operating state, it is lower than From the air conditioner shown in Figure 5, it is more difficult to obtain the necessary condensation temperature in the intermediate heat exchanger 205
[0016] Moreover, since the air conditioner shown in FIG. 6 is irrelevant to the operation mode, the refrigerant generally passes through the intermediate heat exchanger 205, so the efficiency of the case where only the first use-side heat exchanger 203 and the heat source-side heat exchanger 207 are used is reduced. got bigger
In addition, since the first use-side heat exchanger 203 and the intermediate heat exchanger 205 are connected in series, during heating operation, heat loss occurs in the first use-side heat exchanger 203, and the second use-side heat exchanger 212 The temperature cannot rise sufficiently
Therefore, sufficient radiant heating performance cannot be obtained, the heating capacity is insufficient, and there is a problem of feeling uncomfortable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Fig. 1 shows Embodiment 1 of the air conditioner of the present invention, especially the connection state during heating operation.

[0041] The air conditioner of the present invention has an outdoor unit 2, an indoor unit 4, and an intermediate unit 6, which are connected to each other in a ring shape to form a refrigerant circuit.

[0042] The outdoor unit 2 is composed of a compressor 8 for compressing refrigerant (primary refrigerant), an outdoor heat exchanger 10 for exchanging heat between outdoor air and refrigerant, and an electric expansion valve as a throttling device for refrigerant. 12. A four-way valve 14 for switching the circulation direction of the refrigerant, an outdoor control device 16 for controlling the outdoor unit 2 , and an outdoor fan 18 for supplying outdoor air to the outdoor heat exchanger 10 are constituted.

[0043] On the other hand, the outdoor unit 4 is composed of an indoor heat exchanger 20 for exchanging heat between indoor air and...

Embodiment 2

[0066] FIG. 2 shows Embodiment 2 of the air conditioner of the present invention, which includes the structure of Embodiment 1 shown in FIG. 1 , and two check valves 44, 46 are arranged on the intermediate unit 6.

[0067] In more detail, on the refrigerant piping between the intermediate heat exchanger 26, the electric on-off valve 28, and the electric regulating valve 30, a check valve 44 that allows only the refrigerant to flow during the heating operation is installed. The bypass pipe 48 connects the refrigerant piping between the electric on-off valve 28 and the electric regulating valve 30 and the indoor heat exchanger 20, and the refrigerant piping between the compressor 8 and the intermediate heat exchanger 26. At 48, a check valve 46 that allows only refrigerant flow during cooling operation is attached.

[0068] According to this configuration, during the heating operation, since the pressure of the refrigerant on the upstream side of the intermediate heat exchanger ...

Embodiment 3

[0071] Fig. 3 shows a third embodiment of the air conditioner of the present invention, in which a refrigerant circuit is constituted by an outdoor unit 2, an intermediate unit 6, and an indoor unit 4 connected to each other through refrigerant piping.

[0072] As shown in Fig. 3, the compressor 8 for compressing the refrigerant (primary refrigerant), the four-way valve 14 for switching the circulation direction of the refrigerant, and the first utilization side heat exchanger for heat exchange between the indoor air and the refrigerant. The exchanger 20, the first throttling device 50 that can perform throttling control of two-way flow and can be fully opened, the intermediate heat exchanger 26 that can perform heat exchange between the refrigerant and the second medium, and two-way flow The second throttle device 52 for throttling control, the outdoor heat exchanger 10 for exchanging heat between the outdoor air and the refrigerant, and the accumulator 54 for preventing liqui...

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Abstract

An air conditioner of high usability improved in its amenity and economical efficiency by raising a temperature of a secondary refrigerant used in floor heating or hot-water supply to a desired value, in performing the heating operation by an indoor machine. In a heating cycle, an intermediate unit (6) is mounted at an upstream side of the indoor machine (4), and an electric switch valve (28) and an electric adjustment valve (30) configurating a pressure reducing means are connected in parallel with each other between the indoor machine (4) and an intermediate heat exchanger (26).

Description

technical field [0001] The present invention relates to an air conditioner including an outdoor unit and an indoor unit constituting a vapor compression heat pump, and using the same outdoor unit to heat a secondary refrigerant. Background technique [0002] Conventionally, several types of air conditioners including a direct expansion indoor unit and an indoor terminal operated by a secondary refrigerant in a vapor compression heat pump have been disclosed. [0003] An example thereof is shown in FIG. 5 , and the entire device is composed of an outdoor unit 101 , an indoor unit 102 , a hot water unit 103 , and a hot water floor panel 104 . In this air conditioner, cooling and heating by the indoor unit 102 and floor heating by the hot water floor panel 104 can be performed. However, cooling and heating by the indoor unit 102 and floor heating by the hot water floor panels 104 cannot be performed simultaneously. [0004] The outdoor unit 101 is sequentially connected to a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F3/06F25B30/02
Inventor 川边义和渡边幸男安藤智朗
Owner PANASONIC CORP