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Refrigeration cycle device

A refrigeration cycle and control device technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of long defrosting time, achieve the effect of improving defrosting efficiency, suppressing temperature reduction, and realizing defrosting time

Active Publication Date: 2019-05-10
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the heat of multiple refrigeration cycles and the heat of the hot water circuit cannot be effectively utilized, and the defrosting time may become relatively long.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0046] Below, use Figure 1 to Figure 5 The first embodiment of the present invention will be described in detail. use figure 1 The structure of the refrigeration cycle apparatus which shows 1st Embodiment of this invention is demonstrated. This vehicle air conditioner has a first refrigeration cycle circuit 1, a second refrigeration cycle circuit 2, a hot water circuit 5 (heat source cooling water circuit) for cooling a heat source 3, and a cooling circuit for the first refrigeration cycle circuit 1 and the second refrigeration cycle circuit. The control device 6 for controlling the circuit 2 and the hot water circuit 5.

[0047] The control device 6 controls the following components: the switching valve 7 composed of a three-way valve; the first electronic expansion valves 8a, 8b in the first refrigeration cycle circuit 1 and the second refrigeration cycle circuit 2; compressors 9a, 9b; a first solenoid valve 10a, 10b; and a second solenoid valve 11a, 11b. However, the i...

no. 2 approach

[0089] Next, a second embodiment of the present invention will be described. In addition, in each of the following embodiments, the same symbols are assigned to the same constituent elements as in the above-mentioned first embodiment, and description thereof will be omitted, and different configurations will be described. In addition, after 2nd Embodiment, the same code|symbol as 1st Embodiment shows the same structure, and the previous description is referred.

[0090] The second embodiment, such as Image 6 As shown, basically hot water from the engine as the heat source 3 flows to the first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 14 in parallel. However, it is possible to change the flow of hot water to the first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 14 in series by operating a plurality of flow path switching valves (also referred to as three-way valves).

[0091] use Image 6 A re...

no. 3 approach

[0118] Next, a third embodiment of the present invention will be described. Portions different from the above-mentioned embodiment will be described. This third embodiment realizes the simplification of the flow path switching valve of the second embodiment, and realizes the switching of the analog parallel flow path and the series flow path. The structure of the third embodiment can be applied to the first embodiment.

[0119] exist Figure 11 In this case, the hot water flows from the hot water circuit 5 through the main switching valve 7 in series to the first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 14 , respectively. The first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 14 are connected in series, and hot water is supplied from the hot water circuit 5 through the main switching valve 7 .

[0120] On the upstream side and the downstream side of the series body 1314 of the first water refr...

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Abstract

The refrigeration cycle device comprises: a first refrigeration cycle circuit (1); a second refrigeration cycle circuit (2); a hot water circuit (5), which cools the heat source (3); a first water refrigerant heat exchanger (13), the first water refrigerant heat exchanger enables heat exchange between the refrigerant in the first refrigeration cycle circuit and the cooling water in the hot water circuit; and the second water refrigerant heat exchanger (14), the second water refrigerant heat exchanger The refrigerant heat exchanger exchanges heat between the refrigerant in the second refrigeration cycle circuit and the cooling water in the hot water circuit. The first refrigerating cycle and the second refrigerating cycle are controlled so that one performs a heating operation while the other performs a defrosting operation. Accordingly, the defrosting operation is not performed simultaneously. When it is determined that the first refrigeration cycle is in the defrosting operation and the first refrigeration cycle can absorb heat from the hot water, the control device (6) directs the hot water in the hot water circuit (5) to the second A water-refrigerant heat exchanger (13) flows to exchange heat between hot water and refrigerant. The heat absorbed in one refrigeration cycle can be utilized for defrosting the other refrigeration cycle via the hot water circuit, so that the defrosting efficiency can be improved and the defrosting time can be shortened.

Description

[0001] Cross-references to related applications [0002] This application is based on Japanese patent application 2014-150103 filed on July 23, 2014, and Japanese patent application 2015-133794 filed on July 2, 2015, the disclosures of which are incorporated herein by reference. technical field [0003] The present invention relates to a refrigerating cycle device which has a refrigerating cycle circuit constituting a plurality of heat pumps and a plurality of water-refrigerant heat exchangers, and moves the heat absorbed by one of the heat pumps from the air through a hot water circuit. To the other heat pump side, it can be utilized for the other defrosting operation. Background technique [0004] Patent Document 1, which is a prior art, discloses an apparatus having a plurality of refrigeration cycles. An object of this device is to provide a heat pump device capable of defrosting while continuing to supply heat and capable of suppressing fluctuations in the amount of he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60H1/22B60H1/08F25B27/02F25B47/02
CPCF25B27/02Y02A30/274B60H2001/00961B60H1/00921B60H1/3228B60H1/323F25B2339/047F25B49/02F25B2600/2513F25B2600/2519F25B2700/21152F25B2700/2117F25B47/022F25B2400/0409F25B2400/0411F25B2400/0401F25B2400/0403F25B41/42F25B2700/21162
Inventor 藤田明谷口雅巳滝泽亮仓田丈裕
Owner DENSO CORP