CN209910226U

CN209910226U - Capillary tube parallel double electronic expansion valve throttling device

Info

Publication number: CN209910226U
Application number: CN201920376309.9U
Authority: CN
Inventors: 洪宇峰; 夏克盛; 张红岩; 郭宋; 梁志勇; 王丹; 刘丰盛; 傅超; 高连生; 王振宁
Original assignee: Panasonic Appliances Air Conditioning and Refrigeration Dalian Co Ltd
Current assignee: Panasonic Appliances Air Conditioning and Refrigeration Dalian Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2020-01-07
Anticipated expiration: 2029-03-25

Abstract

The utility model provides a capillary tube parallel double electronic expansion valve throttling device, which comprises a capillary tube, an electronic expansion valve a and an electronic expansion valve b; the electronic expansion valve a is connected to the electronic expansion valve branch pipe a through an electronic expansion valve connecting pipe a, and the electronic expansion valve a is connected to the electronic expansion valve branch pipe b through an electronic expansion valve connecting pipe d; the electronic expansion valve b is connected to the electronic expansion valve branch pipe a through an electronic expansion valve connecting pipe b, and the electronic expansion valve b is connected to the electronic expansion valve branch pipe b through an electronic expansion valve connecting pipe c; the electronic expansion valve branch pipe a is connected to an outdoor unit pipe through the branch pipe a, the electronic expansion valve branch pipe b is connected to an indoor unit pipe through the branch pipe b, and the branch pipe a and the branch pipe b are communicated with each other through a capillary tube. The device uses the capillary tube to ensure the basic refrigerant flow, and uses two electronic expansion valves to accurately control the refrigerant flow, thereby finally realizing the purpose of accurately controlling the large flow.

Description

Capillary tube parallel double electronic expansion valve throttling device

Technical Field

The utility model relates to a throttling arrangement, especially a parallelly connected two electronic expansion valve throttling arrangement of capillary.

Background

The throttling devices used by the heat exchangers of the one-to-one air conditioning unit in the market at present are mainly divided into two categories, wherein one category is a capillary tube, and the other category is an expansion valve. On a unit using a capillary tube as a throttling device, a common method is to select a capillary tube to be installed between heat exchangers of an indoor unit and an outdoor unit, and achieve the purpose of refrigerant throttling by selecting the diameter and the length of the capillary tube, the device has no big problem and low cost when being matched with a constant speed compressor, but along with the development of the society, higher requirements are provided for the energy saving property, the control precision, the operation range and the like of an air conditioner, a full frequency conversion air conditioner is operated, a corresponding cut-off device is also converted into an electronic expansion valve control with higher precision, however, for a large-capacity unit, particularly a unit with more than 10 horsepower, the refrigerant flow of two parallel electronic expansion valves cannot meet the requirement of the refrigerant circulation amount, and when 3 or 4 electronic expansion valves are adopted, the cost is high, and the control difficulty is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem that large capacity unit selection two parallelly connected electronic expansion valve refrigerant flow can't satisfy the refrigerant circulation volume requirement, the utility model provides a parallelly connected two electronic expansion valve throttling arrangement of capillary can solve above-mentioned technical problem to realized the requirement of energy-conservation nature, high accuracy control, large capacity operating range of air conditioner on reduce cost's as far as possible basis.

The technical scheme adopted by the utility model for solving the technical problems is to provide a capillary tube parallel double electronic expansion valve throttling device, which comprises a capillary tube, an electronic expansion valve a and an electronic expansion valve b; the electronic expansion valve a is connected to the electronic expansion valve branch pipe a through an electronic expansion valve connecting pipe a, and the electronic expansion valve a is connected to the electronic expansion valve branch pipe b through an electronic expansion valve connecting pipe d; the electronic expansion valve b is connected to the electronic expansion valve branch pipe a through an electronic expansion valve connecting pipe b, and the electronic expansion valve b is connected to the electronic expansion valve branch pipe b through an electronic expansion valve connecting pipe c; the electronic expansion valve branch pipe a is connected to an outdoor unit pipe through the branch pipe a, the electronic expansion valve branch pipe b is connected to an indoor unit pipe through the branch pipe b, and the branch pipe a and the branch pipe b are communicated with each other through a capillary tube.

Further, the capillary tube is connected to the branch tube a through a capillary connection tube a.

Further, the capillary tube is connected to the branch tube b through a capillary connection tube b.

Further, a filter a is provided in the outdoor unit pipe near the capillary tube connection tube a.

Further, a filter b is provided in the indoor unit pipe in the vicinity of the capillary tube connection pipe b.

Further, the branch pipes a and b adopt a U-shaped structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has simple structure, the device with double throttle is adopted to replace the original single capillary tube throttle device or single electronic expansion valve cut-off device, the throttle device is arranged at the outlet of the condenser on the liquid pipe, firstly, the basic unit operation refrigerant quantity is satisfied through the capillary tube, then, the refrigerant flow is accurately controlled through the electronic expansion valve a and the electronic expansion valve b, when the system load is low, the refrigerant flow is less, the capillary tube can satisfy the system throttle requirement, at the moment, the capillary tube is mainly throttled through the capillary tube, the opening degree of the electronic expansion valve a and the electronic expansion valve b is very small or closed, when the system load is high, the refrigerant flow is increased, the capillary tube can not satisfy the system throttle requirement, at the moment, the opening degree of the electronic expansion valve a and the electronic expansion valve b is increased, the capillary tube and, the circulation amount of the system refrigerant is increased.

2. The utility model discloses set up filter a and filter b respectively on the main line, prevent that capillary, electronic expansion valve an and electronic expansion valve b from blockking up.

3. The branch pipe a and the branch pipe b in the device adopt a U-shaped structure, the length is shortened, and the wind resistance caused by the heat exchanger assembly is reduced.

4. By the device, the requirements of low cost, energy conservation, high precision and large operation range of the large-capacity one-to-one air conditioning unit are met.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the working principle of the present invention.

The system comprises an outdoor unit, a filter a, a capillary tube connecting pipe a, a branch pipe b, an electronic expansion valve connecting pipe a, an electronic expansion valve connecting pipe b, an electronic expansion valve a, an electronic expansion valve connecting pipe 10, an electronic expansion valve b, an electronic expansion valve connecting pipe c, a filter b, a capillary tube 3, a capillary tube connecting pipe a, a branch pipe b, an electronic expansion valve connecting pipe 6; 12. electronic expansion valve connecting pipes d and 13, electronic expansion valve branch pipes b and 14, branch pipes b and 15, capillary connecting pipes b and 16, filters b and 17, indoor unit piping 18, indoor unit 19 and outdoor unit.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1, a capillary parallel double electronic expansion valve throttling device comprises a capillary 3, an electronic expansion valve a 9 and an electronic expansion valve b 10; the electronic expansion valve a 9 is connected to the electronic expansion valve manifold a6 through an electronic expansion valve connection pipe a 7, and the electronic expansion valve a 9 is connected to the electronic expansion valve manifold b 13 through an electronic expansion valve connection pipe d 12; the electronic expansion valve b10 is connected to the electronic expansion valve manifold a6 through an electronic expansion valve connection pipe b 8, and the electronic expansion valve b10 is connected to the electronic expansion valve manifold b 13 through an electronic expansion valve connection pipe c 11; the electronic expansion valve manifold a6 is connected to the outdoor unit pipe 1 through a manifold a 5, the electronic expansion valve manifold b 13 is connected to the indoor unit pipe 17 through a manifold b 14, and the manifold a 5 and the manifold b 14 are communicated with each other through a capillary tube 3.

Further, the capillary tube 3 is connected to the branch tube a 5 through a capillary connection tube a 4.

Further, the capillary tube 3 is connected to the branch tube b 14 through a capillary connection tube b 15.

Further, a filter a 2 is provided in the outdoor unit pipe 1 near the capillary tube connection tube a 4.

Further, a filter b16 is provided in the indoor unit pipe 17 near the capillary tube connection pipe b 15.

Further, the branch pipes a 5 and b 14 adopt a U-shaped structure.

As shown in fig. 1, during cooling operation, the refrigerant passes through an outdoor unit pipe 1 and a filter a 2, and then a part of the refrigerant passes through a capillary tube connection tube a 4, a capillary tube 3, and a capillary tube connection tube b 15; the other part of the gas enters an electronic expansion valve a 9 and an electronic expansion valve b10 respectively through a branch pipe a 5, an electronic expansion valve branch pipe a6, an electronic expansion valve connecting pipe a 7 and an electronic expansion valve connecting pipe b 8 in sequence, and then returns to an electronic expansion valve branch pipe b 13 and a branch pipe b 14 through an electronic expansion valve connecting pipe d 12 and an electronic expansion valve connecting pipe c 11 respectively; the refrigerant that has passed through the capillary tube connecting tube b 15 merges into the branch tube b 14, passes through the filter b16, enters the indoor piping 17, and flows back to the main circuit. The refrigerant flow direction is opposite when the heating operation is performed.

As shown in fig. 2, the working principle of the device is as follows: when the flow rate of the refrigerant in the low-load operation of the system is low, most of the refrigerant flows through the capillary loop and is throttled by the capillary 3; when the flow rate of the refrigerant is high during the high-load operation of the system, the refrigerant flow rate of the capillary tube loop is increased, the opening degrees of the electronic expansion valve a 9 and the electronic expansion valve b10 are increased, and the refrigerant is throttled through the capillary tube 3, the electronic expansion valve a 9 and the electronic expansion valve b 10.

The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a parallelly connected two electronic expansion valve throttling arrangement of capillary which characterized in that: comprises a capillary tube (3), an electronic expansion valve a (9) and an electronic expansion valve b (10); the electronic expansion valve a (9) is connected to the electronic expansion valve branch pipe a (6) through an electronic expansion valve connecting pipe a (7), and the electronic expansion valve a (9) is connected to the electronic expansion valve branch pipe b (13) through an electronic expansion valve connecting pipe d (12); the electronic expansion valve b (10) is connected to the electronic expansion valve branch pipe a (6) through an electronic expansion valve connecting pipe b (8), and the electronic expansion valve b (10) is connected to the electronic expansion valve branch pipe b (13) through an electronic expansion valve connecting pipe c (11); an electronic expansion valve branch pipe a (6) is connected to an outdoor unit pipe (1) through a branch pipe a (5), an electronic expansion valve branch pipe b (13) is connected to an indoor unit pipe (17) through a branch pipe b (14), and the branch pipe a (5) and the branch pipe b (14) are communicated with each other through a capillary tube (3).

2. The capillary parallel double-electronic expansion valve throttling device according to claim 1, wherein: the capillary tube (3) is connected with the branch tube a (5) through a capillary tube connecting tube a (4).

3. The capillary parallel double-electronic expansion valve throttling device according to claim 1, wherein: the capillary tube (3) is connected with the branch tube b (14) through a capillary tube connecting tube b (15).

4. The capillary parallel double-electronic expansion valve throttling device according to claim 1, wherein: a filter a (2) is provided in the outdoor unit pipe (1) near the capillary tube connection tube a (4).

5. The capillary parallel double-electronic expansion valve throttling device according to claim 1, wherein: a filter b (16) is provided in the indoor unit piping (17) near the capillary tube connection tube b (15).

6. The capillary parallel double-electronic expansion valve throttling device according to claim 1, wherein: the branch pipe a (5) and the branch pipe b (14) adopt a U-shaped structure.