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Refrigeration cycle device

A refrigeration cycle and refrigerant cycle technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as complexity, increased failure factors, and multiple valve components.

Inactive Publication Date: 2019-01-04
MITSUBISHI HEAVY IND THERMAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since Patent Document 1 is configured to include a throttling mechanism (throttle valve) connected to the upstream side of the cooler of the branch circuit and a throttle valve connected to the downstream side of the cooler of the branch circuit, there are many valves. However, the composition is complicated, and the number of failure factors increases, and the risk of failure may become higher.
In addition, since a throttling mechanism (throttle valve) is connected to the upstream side of the cooler, the power element may be overcooled by the cooler by excessively expanding the refrigerant from the upstream side, and dew condensation may occur on the power element.

Method used

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Examples

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no. 1 Embodiment approach

[0048] Below, use Figure 1 to Figure 4 , the first embodiment of the present invention will be described.

[0049] figure 1 An example of the application of the air conditioning apparatus 1 as a refrigeration cycle apparatus is shown in FIG. In addition, although not shown clearly in the drawings, the refrigeration cycle apparatus can be applied to a heat pump. The air conditioner 1 includes an outdoor unit 2 , gas side piping 3 and liquid side piping 4 led out from the outdoor unit 2 , and an indoor unit (not shown) connected between the gas side piping 3 and the liquid side piping 4 .

[0050] The outdoor unit 2 includes a reverse-phase-driven compressor 11 that compresses the refrigerant, a four-way switching valve 12 that switches the circulation direction of the refrigerant, and an outdoor heat exchanger (heat source side heat exchanger) 13 that allows the refrigerant to circulate with outside air. Heat exchange; outdoor expansion valve for heating (EEVH) 14; accumula...

no. 2 Embodiment approach

[0083] Next, use Figure 5 and Image 6 A second embodiment of the present invention will be described.

[0084] In the second embodiment, the configuration of the cooling device 60 and the control contents of the control unit 34 are partially different from those of the first embodiment. The same reference numerals are assigned to the same configuration as that of the first embodiment, and the description thereof will be omitted.

[0085] like Figure 5 As shown, the cooling device 60 includes a cooling branch pipe 61 , a cooler 32 , a control unit 34 , and an element temperature detector 35 . The cooling branch pipe 61 has an upstream side of the cooler 32 ( Figure 5 The upstream side piping 61A and the upstream side piping 61A on the downstream side ( Figure 5 low pressure side) downstream side piping 61B. The cooler 32 is provided in the cooling branch pipe 61 , and the cooling branch pipe 61 is in thermal contact with the cooler 32 . An upstream capillary 62A is ...

no. 3 Embodiment approach

[0095] Next, use Figure 7 and Figure 8 A third embodiment of the present invention will be described.

[0096] In the third embodiment, the configuration of the cooling device 70 and the control contents of the control unit 34 are partially different from those of the first embodiment. The same reference numerals are assigned to the same configuration as that of the first embodiment, and the description thereof will be omitted.

[0097] like Figure 7 As shown, the cooling device 70 includes a cooling branch pipe 71 , a cooler 32 , a control unit 34 , and an element temperature detector 35 . The cooler 32 is provided in the cooling branch pipe 71 , and the cooling branch pipe 71 is in thermal contact with the cooler 32 . The branch pipe 71 for cooling has upstream piping 71A located on the upstream side of the cooler 32 and downstream piping 71B located on the downstream side of the cooler 32 .

[0098] The upstream piping 71A includes a first upstream piping 71C and a ...

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Abstract

The purpose of the present invention is to provide a refrigeration cycle device having a simple configuration, and to provide a refrigeration cycle device in which excessive cooling and condensation in a power element can be prevented. An air conditioner to which this refrigeration cycle device is applied is provided with a cooling branched pipe (31) that allows some refrigerant between heat exchangers in a refrigerant circuit to bypass to an inlet side of a compressor, a cooler (32) that is in thermal contact with the cooling branched pipe (31) and uses some refrigerant to cool a power element (36) provided to an electric circuit that controls the operation of the compressor, and an expansion valve (33) provided only to a side of the cooling branched pipe (31) that is further downstream than the cooler (32).

Description

technical field [0001] The invention relates to a refrigeration cycle device. Background technique [0002] In an air conditioner that circulates a refrigerant to perform a vapor compression refrigeration cycle, circuits such as an inverter circuit are mounted to control the operating state of a motor of a compressor. Usually, this inverter circuit uses a power element that generates high heat, and conventional air conditioners are provided with a mechanism for cooling the power element so that the temperature of the power element does not exceed the operable temperature. [0003] For example, Patent Document 1 describes a refrigeration device including: a refrigerant circuit that performs refrigeration by connecting a compressor, a heat source-side heat exchanger, an expansion mechanism, and a utilization-side heat exchanger. A circulating main circuit and a branch circuit for branching a part of the high-pressure liquid refrigerant flowing through the main circuit and gui...

Claims

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Application Information

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IPC IPC(8): F25B1/00
CPCF24F1/24F25B13/00F25B31/006F25B2341/062F25B2400/13F25B2600/021Y02B30/70
Inventor 三苫惠介盐谷笃五十住晋一仓地正也吉田纯一
Owner MITSUBISHI HEAVY IND THERMAL SYST