JP2009014292A - Two throttle two-way expansion valve with filtering structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two throttle two-way expansion valve equipped with a filtering structure wherein a refrigerating process and a heat generating process satisfy a required flow rate and normal operation is secured in a refrigerating system of a heat pump type air conditioning device. <P>SOLUTION: The two throttle two-way expansion valve with the filtering device is constituted by a valve element 1, a steel ball 3, a valve opening throttle passage 6, valve opening throttle front (rear) passages 4 and 5, a valve opening throttle rear (front) passage 7, a left liquid body connection pipe 9, a right liquid body connection pipe 10, and a throttle hole 8. A cross section of a passage of the throttle hole 8 is smaller than a maximum cross section of the valve opening throttle passage 6, and a filtering net 2 is provided on both parts between both ends of the valve element 1 and the left liquid body connection pipe 9 and the right liquid body connection pipe 10. A liquid refrigerating agent passes through two time throttle, and as the passage cross section of the throttle hole 8 is a definite amount, the cross section of the valve opening throttle passage 6 is automatically adjusted. When the heat pump type air conditioning device works normally and reversely, the two throttle two-way valve corresponds with the flow rate of the refrigerating process and the heat generating process, and overcomes undulation and vibration, and foreign substances in the refrigerating system are prevented from intruding into an adjustment mechanism of the expansion valve, and normal operation of the system is secured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a double-throttle two-way expansion valve with a filtration structure, which belongs to the throttling technology area of a vapor compression heat pump refrigeration system, and in particular, heat pump air conditioning It is a throttle part applied to the refrigeration system of the apparatus.

  The two-way expansion valve in the throttle part of a known heat pump type air conditioner refrigeration system is a diaphragm that senses the temperature and automatically adjusts the cross-section of the valve mouth throttle passage. Both of the subsequent passage cross-sections are larger than the maximum cross-section of the valve orifice throttle passage, and neither the right or left liquid connecting pipe nor the valve body has a filtration structure. The flow rate required for the refrigeration process and the heat production process is different, and if the diaphragm of the valve orifice passage when the diaphragm senses the temperature does not match the required orifice passage cross section, the mixture left in the refrigeration system will expand into the expansion valve. The control mechanism of the refrigeration system enters and causes a catch or phenomenon, and the effect of the refrigeration system is reduced to make normal operation impossible.

  The problem to be solved is that the two-way expansion valve in the throttle portion of the known heat pump type air conditioner refrigeration system is a one-time throttle, does not have a filtration structure, and the mixture left in the refrigeration system This is the point that enters the adjustment mechanism of the expansion valve and causes clogging.

  The main object of the present invention to solve the above problems is to have a rational design, simple structure, satisfy different flow rates required for the refrigeration process and the heat production process in the refrigeration system of the heat pump type air conditioner, An object of the present invention is to provide a double-throttle two-way expansion valve with a filtration structure that guarantees normal operation of a refrigeration system.

  The double-throttle two-way expansion valve provided with the filtration structure of the present invention includes a valve disc, a steel ball, a valve throttle passage, a valve throttle front (rear) passage, a valve throttle rear (front) passage, and a left liquid connecting pipe. And a right connecting pipe, and a throttle hole is provided on the passage before (or after) the throttle opening (rear) or after (the front) passage of the valve opening, and the passage section of the throttle hole is smaller than the maximum section of the valve throttle passage. It is characterized in that a filtration net is provided between both ends of the valve body and between the left liquid connecting pipe and the right liquid connecting pipe.

  The throttle hole described above is formed by direct machining with the valve body on the passage before (rear) or after (throttle) the valve mouth. The throttle hole described above may be inserted into the passage before the throttle opening (rear) or after the throttle opening (front). The aforementioned throttle hole may be provided in the left liquid connecting pipe or the right liquid connecting pipe.

  The aforementioned filtration net is conical or polygonal pyramid. The filtration net described above may be hemispherical. The filtration net described above may be cylindrical or polygonal. The aforementioned filtration net may be a circular plane or a polygonal plane.

  The two-way throttle two-way expansion valve equipped with the filtration structure of the present invention is provided with a throttle hole on the passage before (rear) or after the throttle (front) passage, and both ends of the valve body and the left liquid connection. A filtration net is provided between the pipe and the right liquid connecting pipe, and in the heat pump type air conditioner refrigeration system, it can respond to different flow requirements of the refrigeration process and the heat production process. Waves or vibrations that frequently occur in the valve are fundamentally overcome, and at the same time, it is impossible to enter the expansion valve adjusting mechanism of the congestion in the refrigeration system, so that the normal operation of the refrigeration system can be guaranteed.

  FIG. 1 shows a first embodiment relating to a double-throttle two-way expansion valve equipped with the filtration structure of the present invention.

  The throttle hole 8 is formed by direct machining with the valve body 1, the passage cross section of the throttle hole 8 is smaller than the maximum cross section of the valve mouth throttle passage 6, and the filtration net 2 includes both ends of the valve body 1 and the left liquid connecting pipe. 9. Arrange between the right liquid connecting pipe 10 and the right liquid connecting pipe 10, respectively. The working process is as shown in FIG. 5 and FIG.

  If the heat pump type air conditioner refrigeration system is in the refrigeration process, the gas refrigerant is compressed by the compressor 41 to become a high-pressure and high-temperature gas refrigerant, enters the outdoor heat exchanger 43 through the four-way solenoid valve 42, and is cooled. When condensed, it becomes a high-pressure liquid freezing agent, and the high-pressure liquid freezing agent enters the double-throttle two-way expansion valve 44 with the filtration structure from the left liquid connecting pipe 9 of the double-throttle two-way expansion valve 44 with the filtration structure, Through the passages 4 and 5 before the throttle opening (rear), the temperature is sensed by the diaphragm and enters the throttle opening passage 6 in which the passage section is automatically adjusted, and the first throttle is applied. The high-pressure liquid cryogen becomes a low-pressure low-temperature gas-liquid mixed refrigerant after the first throttling, enters the throttling hole 8 via the post-throttle passage 7, and the second throttling is performed. The low-pressure low-temperature gas-liquid mixed refrigerant becomes a gas-liquid mixed refrigerant with a lower pressure and temperature and a higher ratio of the gas refrigerant after the second squeezing. Through the right liquid connecting pipe 10, it enters the heat exchanger 45 in the entrance room, absorbs heat and evaporates to become a low-pressure gas refrigerant, returns to the compressor 41 through the four-way solenoid valve 42, and ends the cycle of the refrigeration process.

  If the heat pump type air conditioner is in the process of producing heat, the gas refrigerant is compressed by the compressor 41 to become a high-pressure and high-temperature gas refrigerant, and enters the indoor heat exchanger 45 through the four-way solenoid valve 42. The high-pressure liquid cryogen is condensed from the right liquid connecting pipe 10 of the double-throttle two-way expansion valve 44 with the filtration structure, and the double-throttle two-way expansion valve with the filtration structure. 44, the first throttling is performed by the throttling hole 8, and the second throttling is performed through the valve throttling pre-passage 7 and the valve throttling passage 6. After the second throttling, the gas mixed freezing agent passes through the after-throttle passages 4 and 5 and the left liquid connecting pipe 9 and enters the outdoor heat exchanger 43, absorbs heat, evaporates, and becomes a low-pressure gaseous freezing agent. The four-way solenoid valve 42 returns to the compressor 41 to complete the heat production cycle.

  In the refrigeration process, the valve throttle passage 6 that automatically adjusts the cross section of the passage performs the first throttling, and the throttling hole 8 performs the second throttling. In the heat production process, the throttle hole 8 is the first throttle, and the second throttle is performed in the valve throttle passage 6 that automatically adjusts the passage cross section. In the heat pump type air conditioner, by working in the forward and reverse directions, different flow rates required for the refrigeration process and the heat production process can be satisfied. At the same time, the expansion valve is universal for the second throttle. It fundamentally overcomes the existing waves and vibrations and increases the efficiency of the refrigeration system. A filter net 2 is provided between the valve body 1 and the left liquid connecting pipe 9 and the right liquid connecting pipe 10, both of which are left in the refrigeration system regardless of whether the work is in the forward or reverse direction. In addition to preventing the adjustment mechanism of the expansion valve from clogging, it ensures normal operation of the refrigeration system.

It is a whole block diagram about the Example of the double-throttle two-way expansion valve provided with the filtration structure of this invention. It is a whole block diagram about the Example of the double-throttle two-way expansion valve provided with the filtration structure of this invention. It is a whole block diagram about the Example of the double-throttle two-way expansion valve provided with the filtration structure of this invention. It is a whole block diagram about the Example of the double-throttle two-way expansion valve provided with the filtration structure of this invention. It is a refrigeration system figure of the heat pump type air conditioner concerning the present invention.

Explanation of symbols

1 Disc
2 Filtration net
3 Steel balls
4, 5 Passage before (rear) valve orifice
6 Valve throttle passage
7 Passage after throttle (front)
8 Aperture hole
9 Left liquid connecting pipe
10 Right fluid connection pipe
11 Disc
12 Filtration net
13 Steel balls
14, 15 Passage before (or after) throttle opening
16 Valve orifice passage
17 Aperture hole
18 Passage after throttle opening (front)
19 Left liquid connecting pipe
20 Right fluid connection pipe
21 Disc
22 Filtration net
23 Steel balls
24 Passage before (or after) throttle opening
25 Aperture hole
26 Valve orifice passage
27, 28 Passage after throttle opening (front)
29 Left liquid connecting pipe
30 Right liquid connecting pipe
31 Disc
32 Filtration net
33 steel balls
34 Aperture hole
35 Passage before (or after) throttle opening
36 Valve orifice passage
37, 38 Passage after throttle opening (front)
39 Left liquid connecting pipe
40 Right fluid connecting pipe
41 compressor
42 Four-way solenoid valve
43 Outdoor heat exchanger
44 Double-throttle two-way expansion valve with filtration structure
45 Indoor heat exchanger

Claims (8)

  The double-throttle two-way expansion valve with a filtration structure consists of valve body 1, 11, 21, 31, steel balls 3, 13, 23, 33, valve throttle passage 6, 16, 26, 36, before throttle (Rear) Passage 4, 14, 24, 34, 5, 15, 25, 35, After valve throttling (Front) Passage 7, 17, 27, 37, 8, 18, 28, 38, Left liquid connecting pipe 9, 19, 29, 39 and right liquid connecting pipe 10, 20, 30, 40, before throttle opening (rear) passage 4, 14, 24, 34, 5, 15, 25, 35 or valve opening The throttle holes 8, 17, 25, 34 are provided on the passages 7, 17, 27, 37, 8, 18, 28, 38 after throttling, and the passage cross sections of the throttle holes 8, 17, 25, 34 are Smaller than the maximum cross section of the mouth restricting passages 6, 16, 26, 36, both ends of the valve bodies 1, 11, 21, 31 and the left liquid connecting pipes 9, 19, 29, 39 and the right liquid connecting pipes 10, 20, 30 A double-throttle two-way expansion valve equipped with a filtration structure characterized in that filtration nets 2, 12, 22, and 32 are provided in both of 40 and 40.   The throttle holes 8, 17, 25, 34 are the passages 4, 14, 24, 34, 5, 15, 25, 35 before throttle opening (rear), or the passages 7, 17, 27, after throttle opening (front) The double-throttle two-way expansion valve with a filtration structure according to claim 1, wherein the double-throttle two-way expansion valve is provided with a filtration structure according to claim 1 formed directly on the valve bodies 1, 11, 21, and 31 on 37, 8, 18, 28, and 38.   The throttle holes 8, 17, 25, 34 are the passages 4, 14, 24, 34, 5, 15, 25, 35 before throttle opening (rear), or the passages 7, 17, 27, after throttle opening (front) The double-throttle two-way expansion valve provided with the filtration structure according to claim 1, which is fitted into 37, 8, 18, 28, and 38.   The said throttle hole 8, 17, 25, 34 is installed in the left liquid connecting pipe 9, 19, 29, 39 of the both ends, or the right liquid connecting pipe 10, 20, 30, 40 of Claim 1 characterized by the above-mentioned. Double-throttle two-way expansion valve with filtration structure.   2. The double-throttle two-way expansion valve with a filtration structure according to claim 1, wherein the filtration nets 2, 12, 22, and 32 have a conical shape or a polygonal pyramid shape.   2. The double-throttle two-way expansion valve with a filtration structure according to claim 1, wherein the filtration nets 2, 12, 22, and 32 are hemispherical.   2. The double-throttle two-way expansion valve with a filtration structure according to claim 1, wherein the filtration nets 2, 12, 22, and 32 are cylindrical or polygonal.   2. The double-throttle two-way expansion valve having a filtration structure according to claim 1, wherein the filtration nets 2, 12, 22, and 32 are circular planes or polygonal planes.