Double-source heat pump liquid cooling driving system

Abstract

The utility model relates to the related technical field of heat pump systems, in particular to a double-source heat pump liquid cooling driving system. The system comprises an air source side, a water source side, a user side, a liquid cooling driving piece, an economizer and an electronic expansion valve. The air source side, the water source side and the user side are communicated to the liquid cooling driving part, and one-way valves are arranged on respective lines; the liquid cooling driving part is connected with a first circuit and a second circuit, the first circuit is directly communicated to a user side, the second circuit is communicated to the economizer firstly and then communicated to the user side, and the two circuits are each provided with an electronic expansion valve and a one-way valve in sequence; wherein the first line is provided with a first branch line communicated to the water source side, and the first branch line is provided with an electric ball valve B; a second branch line communicated to the air side is arranged on the second line, and an electric ball valve A is arranged on the second branch line. When the double-source heat pump liquid cooling driving system operates in different modes, a high-pressure side refrigerant can be prevented from being bypassed to a pressure balance side through the one-way valve, and stable operation of the system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of heat pump system especially relates to a double -source heat pump liquid cooling drive system. BACKGROUND

[0002] Double -source heat pump is the system that integrates traditional air -cooled heat pump and water -cooled heat pump, relative to traditional heat pump system, double -source heat pump is divided into four kinds of operation modes totally, is air -cooled cold water (refrigeration), water -cooled cold water (refrigeration), air -cooled heat pump (heating), water -cooled heat pump (heating) respectively, thus need through check valve to guarantee under different mode, refrigerant can circulate according to correct loop. SUMMARY

[0003] In order to solve the above technical problem, the utility model discloses a double -source heat pump liquid cooling drive system, which can prevent the high-pressure side refrigerant from bypassing the check valve to the pressure balance side when the double -source heat pump liquid cooling drive system operates in different modes, ensuring stable operation of the system.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A double -source heat pump liquid cooling drive system, it includes input / output part and operation component, the input / output part includes air source side, water source side and user side, the operation component includes liquid cooling drive piece, economizer and electronic expansion valve;The air source side, water source side and user side all are connected to the inlet end of liquid cooling drive piece through separate line, and are provided with check valve on respective line;The outlet end of liquid cooling drive piece is connected with first line and second line, first line is directly connected to user side, second line is connected to economizer first, then is connected to user side, and the electronic expansion valve and check valve are provided on the two lines in turn;

[0006] Among them, first line is provided with the first branch line connected to water source side between electronic expansion valve and check valve, and the first branch line is provided with electric ball valve B;Second line is provided with the second branch line connected to air source side between electronic expansion valve and check valve, and the second branch line is provided with electric ball valve A.

[0007] As preferred, the economizer is provided with an external enthalpy increasing line and a parallel electronic expansion valve.

[0008] In summary, the utility model has the following advantages:

[0009] Prevent the high-pressure side refrigerant from bypassing the check valve to the pressure balance side when the double -source heat pump liquid cooling drive system operates in different modes, ensuring stable operation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Diagram of an existing dual-source heat pump system driven by liquid cooling;

[0011] Figure 2 This is a system diagram of the liquid-cooled drive for the dual-source heat pump of this utility model;

[0012] Reference numerals: 1. Air source side; 2. Water source side; 3. User side; 4. Liquid-cooled drive unit; 5. Economizer; 6. Electronic expansion valve; 7. Electric ball valve B; 8. Electric ball valve A; 9. Check valve. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0015] It should also be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-2 As shown, a dual-source heat pump liquid-cooled drive system includes an input / output section and an operating component. The input / output section includes an air source side 1, a water source side 2, and a user side 3. The operating component includes a liquid-cooled drive component 4, an economizer 5, and an electronic expansion valve 6. The air source side 1, water source side 2, and user side 3 are all connected to the inlet end of the liquid-cooled drive component 4 via separate lines, and a one-way valve 9 is installed on each of their respective lines. The outlet end of the liquid-cooled drive component 4 is connected to a first line and a second line. The first line is directly connected to the user side 3, and the second line is first connected to the economizer 5 and then to the user side 3. The electronic expansion valve 6 (EEV2 and EEV1, respectively) and the one-way valve 9 are installed sequentially on both lines.

[0018] Due to the above structure and principle of the prior art, Figure 1 therefore, no more description is made.

[0019] As shown in Figure 1 the current liquid-cooled driving system of the dual-source heat pump, a one-way valve 9 is used. When the unit is in air-cooled chilled water mode, the water source side 2 is in a pressure balance state, and then a part of the refrigerant on the high-pressure side of the air source side 1 bypasses the water source side 2 system through the one-way valve A. Similarly, when the unit is in water-cooled chilled water mode, a part of the refrigerant on the high-pressure side of the water source side 2 bypasses the air source side 1 system through the one-way valve B, causing abnormal system operation.

[0020] As shown in Figure 2 , a first branch line connected to the water source side 2 is arranged between the electronic expansion valve 6 and the one-way valve 9 on the first line, and an electric ball valve B7 is arranged on the first branch line; a second branch line connected to the air source side 1 is arranged between the electronic expansion valve 6 and the one-way valve 9 on the second line, and an electric ball valve A8 is arranged on the second branch line.

[0021] The one-way valves 9 at positions A and B are replaced by electric ball valves, and the control logic is as follows:

[0022] 1. When the unit is in air-cooled chilled water mode, the electric ball valve A8 is closed to separate the high-pressure side and the low-pressure side of the air source side 1; the electric ball valve B7 is closed to separate the high-pressure side of the air source side 1 and the pressure balance side of the water source.

[0023] 2. When the unit is in water-cooled chilled water mode, the electric ball valve B7 is closed to separate the high-pressure side and the low-pressure side of the water source side 2; the electric ball valve A8 is closed to separate the high-pressure side of the water source side 2 and the pressure balance side of the air source.

[0024] 3. When the unit is in air-cooled heat pump mode, the electric ball valve A8 is opened to ensure that the refrigerant on the air source side 1 forms a complete circulation system; the electric ball valve B7 is closed to separate the high-pressure side of the air source side 1 and the pressure balance side of the water source side 2.

[0025] 4. When the unit is in water-cooled heat pump mode, the electric ball valve B7 is opened to ensure that the refrigerant on the water source side 2 forms a complete circulation system; the electric ball valve A8 is closed to separate the high-pressure side of the water source side 2 and the pressure balance side of the air source side 1.

[0026] This structure can prevent the refrigerant on the high-pressure side from bypassing the one-way valve 9 to the pressure balance side when the dual-source heat pump liquid-cooled driving system is operated in different modes, and ensure stable operation of the system.

[0027] As shown in Figures 1-2 , the economizer 5 is provided with an external enthalpy-increasing line and a parallel electronic expansion valve (EEV3).

[0028] The above is the description of the embodiments of the present application. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-source heat pump liquid cooling drive system, comprising an input / output part and a running assembly, the input / output part comprising an air source side (1), a water source side (2) and a user side (3), the running assembly comprising a liquid cooling drive (4), an economizer (5) and an electronic expansion valve (6); the air source side (1), the water source side (2) and the user side (3) are all connected to the inlet end of the liquid cooling drive (4) through separate lines, and are provided with one-way valves (9) on the respective lines; the outlet end of the liquid cooling drive (4) is connected with a first line and a second line, the first line is directly connected to the user side (3), and the second line is connected to the economizer (5) and then to the user side (3), and the two lines are both provided with the electronic expansion valve (6) and the one-way valve (9) in sequence; characterized in that, The first line is provided with a first branch line connected to the water source side (2) between the electronic expansion valve (6) and the one-way valve (9), and the first branch line is provided with an electric ball valve B (7); the second line is provided with a second branch line connected to the air source side (1) between the electronic expansion valve (6) and the one-way valve, and the second branch line is provided with an electric ball valve A (8).

2. A dual-source heat pump liquid cooling drive system according to claim 1, wherein, The economizer (5) is provided with an external enthalpy increasing line and a parallel electronic expansion valve (6).

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