JP-7856202-B1 - Heat pump cycle device

JP7856202B1JP 7856202 B1JP7856202 B1JP 7856202B1JP-7856202-B1

Abstract

[Problem] To provide a heat pump cycle device that can reduce pressure loss. [Solution] The heat pump cycle device is a heat pump cycle device in which a plurality of compressors are arranged in parallel, wherein at least one of the pipe lengths is equal: the length of a plurality of supply pipes that supply refrigerant to each compressor from a branching point from a supply pipe on the suction side of the plurality of compressors, or the length of a plurality of outlet pipes that discharge refrigerant from each compressor to a confluence point on the discharge side of the plurality of compressors. [Selection Diagram] Figure 1

Inventors

杉原弘太

Assignees

富士電機株式会社

Dates

Publication Date: 20260511
Application Date: 20250730

Claims (7)

A heat pump cycle device in which multiple compressors are arranged in parallel, On the suction side of the aforementioned multiple compressors, the refrigerant is configured to flow to each compressor through multiple supply pipes that branch off from the supply pipe at a branching point. On the discharge side of the aforementioned plurality of compressors, the refrigerant is configured to flow from the respective outlet pipes of each compressor to a confluence section and then into a confluence pipe. The pipe lengths of the multiple supply pipes are equal, A heat pump cycle device characterized in that the heights of the branching section and the merging section are equal .
A heat pump cycle device in which two compressors are arranged in parallel, On the suction side of the two compressors, two supply pipes that supply refrigerant to each compressor from a branch point of the supply piping are arranged in the horizontal plane. On the discharge side of the two compressors, two outlet pipes for discharging refrigerant from each compressor to the junction pipe are arranged in the horizontal plane. The pipe lengths of the two supply pipes are equal, A heat pump cycle device characterized in that the heights of the branching section and the merging section are equal .
It is equipped with an evaporator that recovers heat from the hot water heat source and evaporates the refrigerant, The heat pump cycle apparatus according to claim 1 or 2 , characterized in that the height of the outlet of the evaporator and the height of the branching section are equal.
A subcooler that preheats the supplied water by exchanging heat with a refrigerant, A condenser that heats the water from the subcooler to condense the refrigerant, Equipped with, The heat pump cycle apparatus according to claim 3 , characterized in that the supercooler is located below the condenser.
The heat pump cycle apparatus according to claim 4 , characterized in that the evaporator and the supercooler are arranged at the same height.
Equipped with two compressors, The connection points for each supply pipe to each compressor are: They are placed at the same height. The heat pump cycle device according to claim 1 or 2 , characterized in that the components are arranged such that the distance from the branching portion is equal in the horizontal direction.
The heat pump cycle device according to claim 1, comprising three or more compressors, wherein, when viewed from a direction along the supply piping, the connection points of each supply pipe to each compressor are arranged to be the vertices of a regular polygon centered on the branching point.

Description

This invention relates to a heat pump cycle device capable of reducing pressure loss. One type of steam generation device is a steam generation heat pump system, which generates steam by recovering heat from waste hot water such as factory wastewater or used cooling water. In a steam generation heat pump system, the evaporator of the heat pump cycle system functions as a waste heat recovery unit, where heat is recovered from the heat source hot water into a refrigerant, and the recovered heat is used to heat the water to be heated in the condenser to generate steam. Therefore, compared to combustion-type steam generation devices that generate steam using boiler equipment, etc., it has the advantage of reducing running costs and CO2 emissions. Patent Document 1 describes a steam generating device that circulates a refrigerant in the following order: compressor, heat radiator, heat exchanger, expansion section, and evaporator. Japanese Patent Publication No. 2023-132164 Figure 1 is a block diagram showing the configuration of a steam generation heat pump device according to an embodiment of the present invention.Figure 2 is a side view of the compression device.Figure 3 is a front view of the compression device.Figure 4 is a side view of the compression device.Figure 5 is a front view of the compression device.Figure 6 is a side view of the compression device.Figure 7 is a front view of the compression device. The following describes embodiments for carrying out this invention with reference to the attached drawings. <Overall Structure> Figure 1 is a block diagram showing the configuration of a steam generation heat pump device 1 according to an embodiment of the present invention. The steam generation heat pump device 1 is a device that recovers heat from waste hot water, uses the recovered heat to generate saturated steam, and outputs it to an external heat utilization facility (not shown). The waste hot water is a heat source medium supplied from a factory or the like. As shown in Figure 1, the steam generation heat pump device 1 comprises a heat pump cycle device 10 that supplies a heat source for steam generation, and a steam generation unit 20 that heats the water to be heated by the condenser 13 of the heat pump cycle device 10 to generate saturated steam. The heat pump cycle device 10 forms a heat pump cycle by connecting a compressor 12 for compressing a refrigerant, a condenser 13 for condensing the refrigerant compressed by the compressor 12 by heat exchange with heated water, a subcooler 14 for heat exchange with the refrigerant from the condenser 13, an expansion valve 15 which is an expansion mechanism for reducing the pressure of the refrigerant condensed in the condenser 13, and an evaporator 11 for recovering the refrigerant expanded by the expansion valve 15 from the heat source medium and evaporating the refrigerant. The steam generation unit 20 preheats the water supplied from the water supply pump 22 by exchanging heat with the refrigerant in the subcooler 14. The water to be heated from the subcooler 14 is then heated by the refrigerant in the condenser 13. The heated water is then separated into saturated steam and hot water via a steam separator 21, where the hot water is combined with the water to be heated and circulated. The saturated steam is also output to the outside via the steam separator 21. <Compressor Configuration> The compression device 12 comprises multiple compressors arranged in parallel. Each compressor is basically installed in the same position and orientation in the refrigerant flow path. In the heat pump cycle device 10, multiple compressors are arranged in parallel according to the system capacity. Depending on the operating state of the system, some of the multiple compressors may be stopped. In the compressor 12, the length of each pipe in the supply pipe 33 that supplies refrigerant from the branch section 32 of the supply pipe 31 to each compressor is equal on the suction side of the multiple compressors. As a result, each compressor in the compressor 12 can draw in refrigerant evenly, reducing pressure loss. It is particularly preferable that the length of each pipe in the supply pipe 33 is equal, as the effect of pressure loss is greater on the suction side piping, which is at a relatively low pressure. Furthermore, in the compressor 12, the pipe lengths of each outlet pipe 34 that discharges refrigerant from each compressor to the confluence section 35 of the confluence pipe 36 are equal on the discharge side of the multiple compressors. As a result, each compressor in the compressor 12 discharges refrigerant evenly, reducing pressure loss. <When there are two compressors> Figure 2 is a side view of the compressor 12A. Figure 3 is a front view of the compressor 12A, showing the compressor 12A as viewed from a direction along the merging pipe 36. Figure 2 is a view taken along arrow A2 in Figure 3, and Figure 3 is a view taken along arrow A1 in Figure 2. The