CN-119712892-B - Three-way reversing valve and refrigerating system

Abstract

The invention discloses a three-way reversing valve and a refrigerating system, wherein the three-way reversing valve comprises a main valve, the main valve is provided with a D connecting pipe, an E connecting pipe and a C connecting pipe, when a valve core component is positioned at a first position, the D connecting pipe is communicated with the E connecting pipe, when the valve core component is positioned at a second position, the D connecting pipe is communicated with the C connecting pipe, the E connecting pipe is provided with a capillary pipe, one end of the capillary pipe is connected with a first end cover part of the main valve, the E connecting pipe can be communicated with a compressor inlet of the refrigerating system through the capillary pipe, thus when the three-way reversing valve is positioned at the second position, the D connecting pipe is communicated with the C connecting pipe, the first condenser works normally, the E connecting pipe is isolated, the E connecting pipe is connected with a second condenser or a reheater to stop working, the capillary pipe is communicated with the compressor inlet, and refrigerant in the reheater pipeline or the second condenser can return to the circulating system through the capillary pipe, so that the refrigerant in the pipeline which does not participate can flow back to the system, and the utilization rate of the refrigerant can be relatively improved.

Inventors

• Request for anonymity
• Request for anonymity

Assignees

• 浙江三花智能控制股份有限公司

Dates

Publication Date

20260505

Application Date

20230928

Claims (6)

1. 1. The three-way reversing valve is characterized by comprising a main valve, wherein the main valve comprises a first end cover part, the main valve is provided with a D connecting pipe, an E connecting pipe and a C connecting pipe, the D connecting pipe is connected with a compressor outlet, the E connecting pipe is connected with a first condenser, and the C connecting pipe is connected with a second condenser or a reheater; The three-way reversing valve further comprises a pilot valve, wherein the inner end part of the three-way reversing valve is fixed on a first capillary tube, a second capillary tube, a third capillary tube and a fourth capillary tube of the pilot valve, and the outer end parts of the first capillary tube, the second capillary tube, the third capillary tube and the fourth capillary tube are respectively communicated with the D connecting tube, the first cavity, the second cavity and the inlet of the compressor; the three-way reversing valve further comprises a fifth capillary tube, one end portion of the fifth capillary tube is connected with the first end cover portion to be communicated with the first cavity, the other end portion of the fifth capillary tube is connected with the E connecting tube, the D connecting tube is communicated with the E connecting tube when the three-way reversing valve is in a first position, the D connecting tube is communicated with the C connecting tube when the three-way reversing valve is in a second position, and the fifth capillary tube is communicated with the inlet of the compressor through the first cavity, the second capillary tube, the pilot valve and the fourth capillary tube.
2. 2. The three-way reversing valve of claim 1, wherein said pilot valve is an electromagnetically controlled pilot valve further comprising a solenoid and a slide bowl, said solenoid controlling reciprocation of said slide bowl.
3. 3. The three-way directional valve according to any one of claims 1 to 2, wherein the fifth capillary tube is provided outside the housing.
4. 4. The three-way reversing valve of claim 3, wherein the housing comprises a hollow cylinder, the first end cap portion and the second end cap portion are respectively fixed at two ends of the hollow cylinder, the D-connection pipe, the E-connection pipe and the C-connection pipe are all arranged in the hollow cylinder, and the fifth capillary tube is fixedly connected to the first end cap portion.
5. 5. A refrigeration system comprising a compressor, a first condenser and a second condenser connected in parallel, and further comprising the three-way reversing valve according to any one of claims 1 to 4, wherein the D-connection of the three-way reversing valve is connected to the outlet pipe of the compressor, the E-connection of the three-way reversing valve is connected to the first condenser, and the C-connection is connected to the second condenser.
6. 6. A refrigeration system comprising a compressor and a reheater connected in series, and further comprising the three-way reversing valve according to any one of claims 1 to 4, and further comprising a direct-connection pipeline connected in parallel with the reheater, wherein the direct-connection pipeline is provided with a switch valve and a condenser, a D connecting pipe of the three-way reversing valve is communicated with an outlet pipe of the compressor, an E connecting pipe of the three-way reversing valve is communicated with an inlet of the reheater, and a C connecting pipe is communicated with the direct-connection pipeline.

Description

Three-way reversing valve and refrigerating system Technical Field The invention relates to the technical field of refrigeration control, in particular to a three-way reversing valve and a refrigeration system. Background The three-way reversing valve is widely applied to a fluid medium pipeline system and is used for switching the flow direction of a medium, a plurality of parallel pipelines or serial reheaters exist in the current system, a selectable runner can be selected from two ways, the unselected pipelines do not participate in work, and for the person skilled in the art, the refrigerant of the pipeline which does not participate in the process needs to automatically flow back into the system as much as possible so as to improve the utilization rate of the refrigerant and the energy efficiency. Disclosure of Invention The invention provides a three-way reversing valve which can relatively improve the utilization rate of a refrigerant and the energy efficiency of a product. The invention provides a three-way reversing valve which is characterized by comprising a main valve, wherein the main valve comprises a first end cover part, the main valve is provided with a D connecting pipe, an E connecting pipe and a C connecting pipe, the D connecting pipe is connected with a compressor outlet, the E connecting pipe is connected with a first condenser, the C connecting pipe is connected with a second condenser or a reheater, when the three-way reversing valve is positioned at a first position, the D connecting pipe is communicated with the E connecting pipe, and when the three-way reversing valve is positioned at a second position, the D connecting pipe is communicated with the C connecting pipe; The three-way reversing valve further comprises a capillary tube, one end portion of the capillary tube is connected with the first end cover portion, the other end portion of the capillary tube is connected with the E connecting tube, and the capillary tube can be communicated with an inlet of the compressor. According to the invention, through the optimal design of the three-way reversing valve, the capillary tube is additionally arranged, one end part of the capillary tube is connected with the first end cover part, and the other end part of the capillary tube is connected with the E connecting tube, so that when the three-way reversing valve is positioned at the second position, the D connecting tube is communicated with the C connecting tube, the first condenser works normally, the E connecting tube is isolated, the E connecting tube is connected with the second condenser or the reheater to stop working, the capillary tube is communicated with the inlet of the compressor, and refrigerant in a reheater pipeline or the second condenser can return to the compressor through the capillary tube and return to the circulating system, so that the refrigerant in the pipeline which does not participate in the system flows back, the utilization rate of the refrigerant can be relatively improved, and the energy efficiency of a product can be improved. Drawings FIG. 1 is a schematic three-dimensional structure of a three-way reversing valve according to the present invention; FIG. 2 is a schematic cross-sectional view of the three-way reversing valve of FIG. 1; FIG. 3 is a schematic diagram of a first embodiment of a refrigeration system according to the present invention; fig. 4 is a schematic diagram of a second embodiment of a refrigeration system according to the present invention. Wherein the one-to-one correspondence between component names and reference numerals in fig. 1-4 is as follows: 10-compressor, 11-first condenser, 12-second condenser, 13-evaporator, 14-filter element; 20-compressor, 21-reheater, 22-condenser, 23-switch valve, 24-evaporator, 25-filter unit; 30-three-way reversing valve, 311-capillary tube, 32-piston, 33-slider, 34-pilot valve, 35-slide bowl, 36-solenoid, 37-main valve, 370-hollow cylinder, 371-first end, 372-second end. Detailed Description The core of the invention is to provide a three-way reversing valve which can improve the refrigerant utilization rate and the energy efficiency of a system. As described in the background art, when the three-way reversing valve works, part of the pipeline system of the whole system participates in the work, and part of the pipeline system does not participate in the work. The three-way reversing valve is used for a refrigerating system, and a refrigerating medium is necessarily present in a pipeline system which does not participate in the work, and the part of the refrigerating medium is remained in the pipeline and cannot enter the system to perform the circulating work, so that the integral working performance of the system is seriously affected. In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying draw