Defrosting flow path of shunting capillary tube of lowest flow path of heat pump

Abstract

The invention relates to a defrosting flow path of a shunting capillary tube of a lowest flow path of a heat pump. The defrosting flow path is characterized by comprising a capillary tube, a one-way valve, a refrigerating capillary tube and a heating capillary tube, the capillary tube is respectively communicated with one end of the heating capillary tube and the one-way valve, the refrigerating capillary tube is respectively communicated with the one-way valve and the other end of the heating capillary tube, and a plurality of winding capillary tubes are arranged on the heating capillary tube, so that the length of the heating capillary tube is increased, and the flow and the pressure of a refrigerant are better controlled. The method has the advantages that the defrosting time is proper, the defrosting time is reduced, the defrosting efficiency is improved, the heating energy efficiency is not influenced, the occupation time ratio of the defrosting time in the defrosting period is ensured to be less than 15%, the national standard of a heat pump is met, and finally, the performance of a unit is not influenced.

Description

Technical Field

[0001] The invention relates to a defrosting flow path of a shunt capillary tube in the lowest flow path of a heat pump. Background Art

[0002] At present, the daily use of the heat pump swimming pool group has found that the heat pump swimming pool group may frost after the heating mode. When the defrost mode is started, the heat pump switches from heating to cooling mode. Due to the longer length of the capillary in the heating mode, the defrosting capacity in the cooling mode is relatively low and the speed is slower. The capillary in the lowest route is the longest, and the defrosting time is about 30 to 60 seconds longer than that of the capillaries in other routes, resulting in a long defrosting time process for the heat pump. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a defrost flow path with a capillary tube at the bottom flow path of a heat pump, which has a suitable defrost time, reduces the defrost time, improves the defrost efficiency without affecting the energy efficiency of heating, ensures that the defrost time is less than 15% of the time occupied in the defrost cycle, meets the national standard of the heat pump, and finally, does not affect the performance of the unit.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented as follows: it is a defrost flow path of a heat pump's lowest flow path shunt capillary, comprising a capillary, a one-way valve, a cooling capillary and a heating capillary; the capillary is respectively connected to one end of the heating capillary and the one-way valve, the cooling capillary is respectively connected to the one-way valve and the other end of the heating capillary, and a plurality of winding capillaries are provided on the heating capillary to increase the length of the heating capillary to better control the flow and pressure of the refrigerant.

[0005] The advantages of the present invention compared with the prior art are: suitable defrost time, reduced defrost time, improved defrost efficiency without affecting the energy efficiency of heating, ensuring that the defrost time occupies less than 15% of the time in the defrost cycle, meeting the national standard for heat pumps, and finally, will not affect the performance of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0007] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0008] In the description of the present invention, the terms "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0009] In the present invention, unless otherwise clearly specified and limited, the terms "set", "connect" and "install" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a detachable set, or an integrated one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, which can make the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0010] like Figure 1 It is shown that it is a defrost flow path of a heat pump's lowest flow path shunt capillary, comprising a capillary 1, a one-way valve 2, a cooling capillary 3 and a heating capillary 4; the capillary 1 is respectively connected to one end of the heating capillary 4 and the one-way valve 2, the cooling capillary 3 is respectively connected to the one-way valve 2 and the other end of the heating capillary 4, and a plurality of winding capillaries 41 are provided on the heating capillary 4 to increase the length of the heating capillary 4 to better control the flow and pressure of the refrigerant.

[0011] Winding the capillary tube 41 can increase its length, thereby improving the sensitivity and measurement accuracy of the capillary tube. In the heating mode, the increase in the length of the capillary tube can better control the flow and pressure of the refrigerant, ensuring the stability and efficiency of the system during the heating process. The winding of the capillary tube in the heating mode is to improve the heat exchange efficiency, balance the system pressure, and ensure the stable operation of the system.

[0012] The measured comparison data are as follows: Defrost test: Comparison of defrost time for different capillary lengths in the lowest flow path under the same working conditions, water temperature and operating frequency.

[0013] Ambient temperature dry bulb temperature 2℃, wet bulb temperature 1.8℃, water inlet temperature 38℃ Take the 12KW variable frequency R290 swimming pool prototype test as an example (the lowest flow path uses capillaries of different lengths): In summary, under the same operating conditions, the same operating frequency, and a similar degree of frost, the time required for defrosting is significantly shortened when the capillary tube in the lowest flow path is shortened.

[0014] In this solution, the defrost time is suitable, the defrost time is reduced, the defrost efficiency is improved without affecting the energy efficiency of heating, and it is ensured that the defrost time occupies less than 15% of the time in the defrost cycle, meeting the national standard of heat pumps. Finally, it will not affect the performance of the unit.

[0015] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and deformations of these embodiments without departing from the principles and purposes of the present invention still fall within the scope of protection of the present invention.

Claims

1. A defrosting flow path of a heat pump with a capillary tube at the bottom of the flow path, characterized in that The invention comprises a capillary tube (1), a one-way valve (2), a cooling capillary tube (3) and a heating capillary tube (4); the capillary tube (1) is respectively connected to one end of the heating capillary tube (4) and the one-way valve (2); the cooling capillary tube (3) is respectively connected to the one-way valve (2) and the other end of the heating capillary tube (4); and a plurality of winding capillary tubes (41) are provided on the heating capillary tube (4) so ​​that the length of the heating capillary tube (4) is increased to better control the flow rate and pressure of the refrigerant.

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