Heat pump device, two-stage compressor, and operation method of heat pump device
A technology of two-stage compressor and heat pump device, applied in the direction of compressor, irreversible cycle compressor, pump, etc., can solve heating and other problems, and achieve the effect of reducing over-compression loss
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Embodiment approach 1
[0036] In Embodiment 1, a two-stage compressor 100 having a bypass port for bypassing a high-stage compressor will be described.
[0037] figure 1 It is a plan view of the two-stage compressor 100 of Embodiment 1.
[0038] figure 2 yes figure 1 A-A' sectional view in . In addition, in figure 2 In the figure, a-a' cross section is shown about the intermediate connection pipe 51 part.
[0039] image 3 yes figure 2 The enlarged view of the compression mechanism part 3 and the surrounding area of the compression mechanism part 3 in .
[0040] Figure 4 yes figure 1 B-B' sectional view in . Figure 5 yes figure 2 C-C' sectional view in .
[0041] Image 6 yes figure 2 D-D' sectional view in .
[0042] Figure 7 yes figure 2 E-E' section view in .
[0043] Figure 8 yes figure 2 The F-F' sectional view in .
[0044] First, the configuration of the two-stage compressor 100 will be described.
[0045] Such as figure 2 As shown, the two-stage compresso...
Embodiment approach 2
[0099] In Embodiment 2, a two-stage compressor 100 having a mechanism that causes refrigerant flowing into the suction muffler 7 to bypass the low-stage compression section 10 and be sucked into the high-stage compression section 30 will be described.
[0100] Figure 11 It is a block diagram of the two-stage compressor 100 of Embodiment 2.
[0101] About the two-stage compressor 100 of Embodiment 2, only the part which differs from the two-stage compressor 100 of Embodiment 1 is demonstrated.
[0102] In the two-stage compressor 100, in the middle of the suction pipe 8 connecting the suction muffler 7 and the low-stage suction port 21 of the low-stage compression part 10, and the intermediate outlet 22 of the low-stage cover 19 and the high-stage suction of the high-stage compression part 30 A four-way valve 54 (switching unit) is provided in the middle of the intermediate connecting pipe 51 connected to the port 41 .
[0103] The four-way valve 54 is used to switch the fol...
Embodiment approach 3
[0120] In Embodiment 3, the two-stage compressor 100 for supplying the suction refrigerant of the high-stage compression section 30 to the low-stage back pressure chamber 26 of the low-stage blade 13 of the low-stage compression section 10 will be described.
[0121] Figure 12 It is a cross-sectional view of the compression mechanism unit 3 of the two-stage compressor 100 according to the third embodiment.
[0122] About the two-stage compressor 100 of Embodiment 3, only the part which differs from the two-stage compressor 100 of Embodiment 2 is demonstrated.
[0123] The two-stage compressor 100 has a pressure introduction passage 55, which passes through the middle partition plate 50, and makes the low-stage back pressure of the high-stage suction flow path 42 between the high-stage suction port 41 and the high-stage compression chamber 35 and the low-stage compression part 10 Chamber 26 communicates.
[0124] Since the pressure introduction path 55 is provided, the refri...
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