Large-temperature-difference heat pump unit

Abstract

The utility model belongs to the technical field of heat exchange equipment, and particularly relates to a large-temperature-difference heat pump unit. A driving heat source inlet is connected with the regenerator and the high-temperature heat exchanger through pipelines, the evaporator is connected with the low-temperature heat exchanger through a pipeline, the evaporator is connected with a driving heat source outlet through a pipeline, and a heating water inlet is connected with the low-temperature heat exchanger through a pipeline. The condenser is connected with the absorber through a pipeline; the low-temperature heat exchanger is connected with the heating water outlet through a pipeline; the high-temperature heat exchanger is connected with the heating water outlet through a pipeline; and the absorber is connected with the heating water outlet through a pipeline. Through countercurrent flow heat exchange, the temperature of the heating water outlet of the large-temperature-difference heat pump unit is increased to 90 DEG C from 50-60 DEG C, higher outlet water temperature is achieved, the heat source utilization rate of the unit is greatly increased, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange equipment, and specifically relates to a large temperature difference heat pump unit. Background Art

[0002] With the rapid development of urbanization, housing area has increased sharply, and the demand for heating in cities has also increased. However, due to the insufficient capacity of the existing pipeline network, the investment in pipeline network transformation is huge and the cycle is long, resulting in limited heat network transmission. The large temperature difference heat pump unit belongs to the first type of lithium bromide absorption heat pump. It takes heat from the driving heat source and transfers the heat to the heating water. The existing large temperature difference heat pump unit can only heat the low-temperature hot water to a certain temperature, but now users often need the unit to provide higher temperature heating water and higher heat exchange efficiency. Therefore, how to meet the heating needs of users has become a problem that technicians in this field need to solve urgently. Utility Model Content

[0003] In order to solve the problem of increased heating demand, the utility model proposes a large temperature difference heat pump unit, which is composed of an evaporator, a regenerator, an absorber, a condenser, a driving heat source inlet, a driving heat source outlet, a heating water inlet, a heating water outlet, a low-temperature heat exchanger, a high-temperature heat exchanger and connecting pipes, wherein the driving heat source is divided into two paths, and the heating water is divided into three paths. The design of heating the heating water in three paths and then merging them into one path improves the utilization rate of the driving heat source and achieves the purpose of increasing the outlet temperature of the heating water from 50-60°C to 90°C.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a large temperature difference heat pump unit, characterized in that it includes an evaporator, a regenerator, an absorber, a condenser, a driving heat source inlet, a driving heat source outlet, a heating water inlet, a heating water outlet, a low-temperature heat exchanger, and a high-temperature heat exchanger, wherein the evaporator and the absorber are arranged in a cylinder, the regenerator and the condenser are arranged in a cylinder, the driving heat source inlet is connected to the regenerator and the high-temperature heat exchanger through a pipeline, the evaporator is connected to the low-temperature heat exchanger through a pipeline, the evaporator is connected to the driving heat source outlet through a pipeline, the heating water inlet is connected to the low-temperature heat exchanger through a pipeline, the heating water inlet is connected to the high-temperature heat exchanger through a pipeline, the heating water inlet is connected to the condenser through a pipeline, the condenser is connected to the absorber through a pipeline, the low-temperature heat exchanger is connected to the heating water outlet through a pipeline, the high-temperature heat exchanger is connected to the heating water outlet through a pipeline, and the absorber is connected to the heating water outlet through a pipeline.

[0005] The driving heat source inlet is connected to the unit regenerator, low-temperature heat exchanger, and evaporator in sequence through driving heat source branch 1; the driving heat source inlet is connected to the high-temperature heat exchanger and the driving heat source outlet in sequence through driving heat source branch 2.

[0006] The heating water inlet is connected to the low-temperature heat exchanger and the heating water outlet in sequence through the heating water branch one; the heating water inlet is connected to the condenser, the absorber, and the heating water outlet in sequence through the heating water branch two; the heating water inlet is connected to the high-temperature heat exchanger and the heating water outlet in sequence through the heating water branch three.

[0007] The beneficial effects of the utility model are as follows: by reasonably arranging the unit process, the driving heat source is used in multiple stages, the energy utilization efficiency of the driving heat source is improved, and the heating water is heated up multiple times by splitting the heating water to achieve the production of higher temperature heating water, and the outlet temperature of the heating water is increased from 50℃-60℃ to 90℃, which increases the heating capacity of the unit, greatly improves the heat exchange efficiency of the unit, and can meet the higher needs of users. At the same time, the higher outlet water temperature realizes the heating water transportation over a longer distance, and reduces the system pipeline cost. The utility model improves the energy utilization efficiency and achieves energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the structure of a large temperature difference heat pump unit provided by the utility model;

[0009] In the figure: 1-evaporator, 2-regenerator, 3-absorber, 4-condenser, 5-driving heat source inlet, 6-driving heat source outlet, 7-driving heat source branch one, 8-driving heat source branch two, 9-heating water inlet, 10-heating water outlet, 11-heating water branch one, 12-heating water branch two, 13-heating water branch three, 14-low-temperature heat exchanger, 15-high-temperature heat exchanger. DETAILED DESCRIPTION

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments: Example

[0011] like Figure 1 The large temperature difference heat pump unit shown is composed of an evaporator 1, a regenerator 2, an absorber 3, a condenser 4, a driving heat source inlet 5, a driving heat source outlet 6, a driving heat source branch one 7, a driving heat source branch two 8, a heating water inlet 9, a heating water outlet 10, a heating water branch one 11, a heating water branch two 12, a heating water branch three 13, a low-temperature heat exchanger 14, and a high-temperature heat exchanger 15.

[0012] The condenser and the regenerator are arranged in one cylinder, and the evaporator and the absorber are arranged in one cylinder. The regenerator 2, the evaporator 1, the low-temperature heat exchanger 14, the high-temperature heat exchanger 15, the driving heat source inlet 5, and the driving heat source outlet 6 constitute a driving heat source cycle, that is, the driving heat source is divided into two paths after coming out of the driving heat source inlet 5. One path is the driving heat source branch 1 7 entering the unit regenerator 2 to heat the solution, and then entering the low-temperature heat exchanger 14 through the pipeline to continue to heat the heating water, and then transported to the evaporator 1 through the pipeline, and continue to transfer the heat to the refrigerant in the evaporator 1. After completing the heat exchange, it flows to the driving heat source outlet 6 through the pipeline. The other driving heat source branch 2 8 enters the high-temperature heat exchanger 15 through the pipeline, heats the heating water in the high-temperature heat exchanger 15, and then flows to the driving heat source outlet 6 through the pipeline, and merges with the driving heat source branch 1 7 from the low-temperature heat exchanger 14, and flows out of the unit together.

[0013] The condenser 4, absorber 3, low temperature plate exchanger 14, high temperature heat exchanger 15, heating water inlet 9, and heating water outlet 10 together form a heating water cycle, that is, the heating water flows out from the heating water inlet 9 and is divided into three paths, wherein the heating water branch 1 11 enters the low temperature heat exchanger 14 through the pipeline, is heated by the driving heat source branch 1 7 from the evaporator 1, and then comes to the heating water outlet 10 through the pipeline, and the heating water branch 2 12 enters the condenser 4 through the pipeline, is heated by the refrigerant steam from the regenerator 2, and then enters the absorber 3 to be further heated by the solution, and finally flows to the heating water outlet 10 through the pipeline. The heating water branch 3 13 enters the high temperature heat exchanger 15 through the pipeline, is heated by the driving heat source branch 2 8, and then comes to the heating water outlet 10 through the pipeline to merge with the other two heating water branches, and finally completes the heating of the heating water.

[0014] The utility model proposes a large temperature difference heat pump unit, which can make full use of the heat of the driving heat source by using the above-mentioned implementation mode, and increase the outlet temperature of the heating water to 90°C. At the same time, the process of the unit is reasonably distributed, and the countercurrent design of the heating water branch 12 first enters the condenser 4 and then enters the absorber 3 is used to improve the heat exchange efficiency of the unit and reduce the heat exchange area of ​​the regenerator 2. The utility model uses this reasonable arrangement to improve the energy utilization efficiency and achieve energy saving and emission reduction.

[0015] The unit is not limited to single-effect, single-stage, and single-section types, but is also applicable to multi-effect, multi-stage, and multi-section types, and other large temperature difference heat pump units. Any modifications, equivalent replacements, and improvements made under the new protection scope are included in the protection scope of this utility model. Any modifications, equivalent replacements, and improvements made without departing from the protection scope of this utility model are included in the protection scope of this utility model.

Claims

1. A large temperature difference heat pump unit, characterized in that: It includes an evaporator (1), a regenerator (2), an absorber (3), a condenser (4), a driving heat source inlet (5), a driving heat source outlet (6), a heating water inlet (9), A heating water outlet (10), a low-temperature heat exchanger (14), and a high-temperature heat exchanger (15), wherein the evaporator (1) and the absorber (3) are arranged in a cylinder, the regenerator (2) and the condenser (4) are arranged in a cylinder, the driving heat source inlet (5) is connected to the regenerator (2) and the high-temperature heat exchanger (15) through a pipeline, the evaporator (1) is connected to the low-temperature heat exchanger (14) through a pipeline, the evaporator (1) is connected to the driving heat source outlet (6) through a pipeline, the heating water inlet (9) is connected to the low-temperature heat exchanger (14) through a pipeline, the heating water inlet (9) is connected to the high-temperature heat exchanger (15) through a pipeline, the heating water inlet (9) is connected to the condenser (4) through a pipeline, the condenser (4) is connected to the absorber (3) through a pipeline, the low-temperature heat exchanger (14) is connected to the heating water outlet (10) through a pipeline, the high-temperature heat exchanger (15) is connected to the heating water outlet (10) through a pipeline, and the absorber (3) is connected to the heating water outlet (10) through a pipeline.

2. A large temperature difference heat pump unit according to claim 1, characterized in that: The driving heat source inlet (5) is connected in sequence to the unit regenerator (2), the low-temperature heat exchanger (14), and the evaporator (1) through the driving heat source branch 1 (7); the driving heat source inlet (5) is connected in sequence to the high-temperature heat exchanger (15) and the driving heat source outlet (6) through the driving heat source branch 2 (8).

3. A large temperature difference heat pump unit according to claim 1, characterized in that: The heating water inlet (9) is connected in sequence to a low-temperature heat exchanger (14) and a heating water outlet (10) via a heating water branch one (11); the heating water inlet (9) is connected in sequence to a condenser (4), an absorber (3), and a heating water outlet (10) via a heating water branch two (12); and the heating water inlet (9) is connected in sequence to a high-temperature heat exchanger (15) and a heating water outlet (10) via a heating water branch three (13).

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