Double-valve-needle type thermostatic expansion valve and method
A thermal expansion valve and valve needle technology, applied in lighting and heating equipment, fluid circulation arrangements, refrigeration components, etc., can solve problems such as poor working capacity, and achieve the effect of improving unit efficiency and ensuring stability
Pending Publication Date: 2022-02-25
SHANGHAI THERMOSTAT FACTORY
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is that the dual-valve needle thermal expansion valve in the prior art has poor working ability in the heat preservation stage due to the large load difference between the cooling stage and the heat preservation stage. Type thermal expansion valve and method
Method used
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[0020] The invention will be further described in detail below with reference to the accompanying drawings. It should be noted herein to help understand the invention, but does not constitute a limitation of the invention. Further, the technical features according to each of the various embodiments described below can be combined with each other as long as they do not constitute a collision between each other.
[0021] See figure 1 It is shown in the figure that a two-valve needle thermal expansion valve for a large unit of cooling load range.
[0022] The double valve needle thermal expansion valve is composed of a valve body 1, a spool assembly 2, a valve needle assembly 3, a power assembly 4, and the like.
[0023] The valve body 1 has a medium inlet 11, an upper chamber 12, a medium outlet 13 in communication with the medium inlet 11, and a lower chamber 14 in communication with the medium outlet 13, the upper chamber 12 and the The valve body valve port 15 between the lower c...
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The invention discloses a double-valve-needle type thermostatic expansion valve and method. The double-valve-needle type thermostatic expansion valve comprises a valve body, a valve element assembly, a valve needle assembly and a power assembly, wherein the valve body is provided with a medium inlet, an upper cavity, a medium outlet, a lower cavity, a valve body valve port and a valve vertical channel; the valve element assembly is provided with a valve element body, the valve element body is provided with a valve element upper section, a valve element lower section and a valve element connecting section, and a first throttling opening is defined by the outer circumferential face of the valve element connecting section and the inner circumferential face of the valve body valve opening; the valve needle assembly is provided with a valve needle base and a valve needle body, and a second throttling opening is defined by the outer circumferential surface of the valve needle body and the inner circumferential surface of the lower-section blind hole; and the power assembly is provided with a power diaphragm. The double-valve-needle type thermostatic expansion valve has the beneficial effects that the first throttling opening and the second throttling opening are formed, the first throttling opening can be selectively opened, the second throttling opening is always opened, the first throttling opening is mainly responsible for the large-load cooling working condition, and the second throttling opening is responsible for the small-load heat preservation working condition, so that the unit efficiency is improved, and the unit operation stability is guaranteed.
Description
Technical field [0001] The present invention relates to a two-valve needle thermal expansion valve and method. Background technique [0002] In a cryopreal system such as a refrigerator, a cold storage, when the unit is put into the item, the temperature is started, and the load required is the largest. Once the low temperature system reaches the design temperature, the load will minimize and remain normal. Among them, the maximum load at the low temperature system is much greater than the minimum load, which may be 2-4 times. At present, when the two-valve needle thermal expansion valve is selected, the cooling load is first considering, so the expansion valve of the larger refrigeration amount is selected, otherwise the amount of cooling amount in the evaporator is low in the evaporator during the cooling process. A disadvantage is that the specifications of the valve are excessively selected, and when the low temperature system reaches the design temperature, enter the insulat...
Claims
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Login to View More IPC IPC(8): F25B41/335
CPCF25B41/335
Inventor 杨敏辉杜鑫磊
Owner SHANGHAI THERMOSTAT FACTORY