JPS58208569A - Refrigeration cycle of heat pump type air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the refrigeration cycle of a heat pump type air conditioner.

The refrigeration cycle of conventional heat pump air conditioners is the first
This will be explained with reference to FIGS. 1 is the outdoor unit, 2 is the indoor unit, 3 is the compressor, 4 is the four-way switching valve, 4'' is the valve body of the four-way switching valve 4, 5 is the heat exchanger, 6 is the check valve, 7 is for cooling Capillary tube of pressure reducing device, 8 is heat exchanger, 9
1 is a low pressure gas pipe, and 10 is a capillary tube of a pressure reducing device for heating. Figures 2 and 3 are detailed views of the check valve 6 and capillary tube 7.10, and 6 and 1 are the bodies;
61+ is a valve body, 6c is a valve seal stopper, 6d is a large refrigerant passage provided in the center of the valve seal stopper 6c, and 6e is a valve stopper. To perform cooling operation with this configuration, set the valve body 4'' of the four-way switching valve 4 to the position shown by the solid line and operate the compressor 3, and the refrigerant will flow from the compressor 3 to the four-way switching valve 4 to
Heat exchanger 5 → check valve 6-1 - capillary tube 7 →
The refrigerant circulates through the heat exchanger 8, the four-way switching valve 4, the low-pressure gas pipe 9, and the compressor 3, and the refrigerant is depressurized through the capillary valves 1 to 7 to perform a well-known cooling operation. At this time, the capillary tube I'f+ and .)1;
1+ is the small droplet position in Figure 3, the refrigerant is flowing, and the check valve installed in the =lle row with the capillary tube 7 has a valve body (
il+ is in the position shown in FIG. If the pressure line machine 3 is operated with the body 4 in the position shown by the broken line, the refrigerant will be transferred to the compressor 3, the four-way switching valve 4-→heat exchanger 8, and the reverse 11-
Valve 6 - capillary tube 10 - heat exchanger 5 -> four-way switching valve - 1 - - low, waste pipe 5] -> circulates with compressor 3, and the refrigerant is depressurized in capillary tube 10. Carry out the well-known heating operation. do. At this time, the valve body 61) of the check valve 6 installed in parallel with the capillary tube 7 is in the position shown in FIG. The valve body 61) is the second
The position shown in the figure is 1, and the refrigerant is not flowing. With this configuration, there are check valves in rows 1 and 1 for each of the capillary tube 7, which is a pressure reducing device for cooling, and the capillary tube 10 for heating. There were disadvantages in that the number of parts was increased due to the casing, and the refrigeration cycle configuration was complicated, resulting in poor workability.

The present invention has been made to improve the above-mentioned drawbacks.

In other words, a refrigerant pressure reducing device and a check valve are integrated, and when the refrigerant flows in a certain direction, a predetermined refrigerant pressure reducing effect (1' L) is created, but when the refrigerant flows in the opposite direction, the valve device has no pressure reducing effect. This is a refrigeration cycle for a heat pump type air conditioner characterized by the following:

The present invention will be explained below with reference to an embodiment shown in FIGS. 5 to 8.

11.11' is a valve device of the present invention; 11. I is a hotty, 111), ll'b is a valve body, ++c is a valve seal stopper, 11 (1 is a large refrigerant passage provided in the center of the valve seal stopper 11), 11(* is a valve stopper) , In, 11'f are valve bodies 1112.11, respectively.
゛A narrow refrigerant passage installed in I. 1, same as the conventional example.
”] The bows indicate the same thing. 1. With such a configuration, cold
To operate the 4-way switching valve 4, set the valve element 1" of the four-way switching valve 4 to the position indicated by the solid line. To operate the heavy condensation valve 3, the refrigerant is transferred to the compressor 3.
Four-way switching valve 4-heat exchanger 5→valve device 11→valve device 11'
-・Heat exchanger 8 → four-way J exchange valve 4・Low pressure waste pipe 9−・
It circulates with the compressor 3. At this time, the valve body 111 of the valve device 11
) is in the position shown in FIG. 7, and the refrigerant passes through the refrigerant passage 11.I and flows without being depressurized. Valve device 11" is valve body 11
'l+ is the valve seal stopper 1j as shown in Figure 6.
C, the refrigerant passes through the narrow refrigerant passage 11''1 and is depressurized. In this way, the cooling operation of 11 is obtained.

In addition, for heating operation, the valve body 4' of the four-way switching valve 4 should be placed in the position shown by the broken line. 1-・Heat exchanger 8 → Valve device 11° Valve device 11 ・Heat exchanger 5 ・Four-way 1.7J switching valve 4 ・Low heavy waste pipe () ・Compressor: 3 and! Itl'l rings. At this time, the valve body 11'l of the valve device 11;
The refrigerant passes through the refrigerant passage 11.I and flows without being depressurized.The valve device 11 and the valve body 11;)
1 (as shown in FIG. 1), the refrigerant passes through the narrow refrigerant passage In and is depressurized. In this way, the well-known heating operation is obtained.

Since the present invention is constructed in this way, by providing a valve device with a simple structure in which a thin refrigerant passage is provided in the valve body of a conventional check valve, other pressure reducing devices for cooling and heating devices are not required, and the number of parts can be reduced. This has the effect that the refrigeration cycle is reduced, and the refrigeration cycle structure is simplified and workability is improved. Furthermore, it has the great effect that the effect of reducing the pressure of the refrigerant can be easily adjusted simply by changing the cross-sectional area of the narrow refrigerant passage provided in the valve body.

[Brief explanation of drawings]

Figure 1 is a refrigeration cycle diagram of a conventional heat pump air conditioner, Figures 2 and 3 are detailed diagrams of a conventional check valve and refrigerant pressure reducing device, Figure 4 is a valve seal stopper, and Figure 5 is a diagram of a conventional heat pump air conditioner. Refrigeration cycle diagram of the heat pump type air conditioner of the present invention, No. 6
7 are detailed views of the valve device of the present invention, and FIG. 8 is a perspective view of the valve body of the present invention. 1...Outdoor unit, 2...Indoor unit, 3...
・Compressor, 4... Four-way switching valve, 5.8... Heat exchange valve, 7.10... Capillary tube, II, 11'
...Valve device of the present invention, 11;1...Body, llb
, ll'b... Valve body, 11c... Valve seal slot -
Flange 111d...refrigerant passage, l] c-...valve stopper, llf, ll'f...valve body 11b, 11'
A narrow refrigerant passage installed in h. Figure 2 10.7 10.7 Tomi 4 Figure Rod 5 Shi 1

Claims (1)

[Claims] 1. In the refrigeration cycle of a heat pump 2′ and an air conditioner, which are composed of a compressor, a heat exchanger, a four-way switching valve, etc., when the refrigerant flows in a certain direction, a predetermined refrigerant is used as a refrigerant pressure reduction device. A refrigeration cycle of a heat pump type air conditioner having a 9.1° characteristic that a device is provided that has a pressure reduction effect but does not have a pressure reduction effect when the refrigerant flows in the opposite direction. 2. Body (In,), valve stopper (ll'l, valve seal month 1 stopper (, I I t: ), valve body (111, 1) with a large refrigerant passage (1, 1, 1) in the center.
, 11"b), etc., and the valve body 11I,
Narrow refrigerant passage (111, Il'r) in I I'll
A refrigeration recycle for a heat pump type air conditioner according to claim 1, wherein a valve device (11, 11'') provided with a valve device (11, 11'') is provided as a refrigerant pressure reducing device.