Compression and absorption combined type heat pump capable of being used in winter and summer

Abstract

The utility model discloses a compression and absorption combined type heat pump capable of being used in winter and summer, which is characterized by comprising an absorption type heat pump, a compression type refrigerating machine and a refrigerant three-way valve, the absorption heat pump comprises a generator, a high-temperature condenser, an absorber and a high-temperature evaporator, and the compression refrigerating machine comprises a low-temperature evaporator, a low-temperature condenser, a compressor and a throttling valve. Waste heat water enters the low-temperature evaporator to be cooled, and high-temperature heat generated through pressurization of the compressor enters the low-temperature condenser to be released in summer and enters the high-temperature evaporator to be cooled in winter; in winter, a high-temperature heat source enters the generator, and after absorption type circulation, heat of the generator and the high-temperature evaporator is released outwards through the absorber and the condenser. Independent compression type circulating refrigeration can be realized in summer, and the refrigeration efficiency is high; the compression and absorption combined type heating function is achieved in winter, the outlet water temperature is high, and the heat supply requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, ventilation and air conditioning, and in particular relates to a compression-absorption composite heat pump for both winter and summer use. Background Art

[0002] There are a large number of processes in the industrial field that require lower temperatures. When the outdoor temperature is high during the non-heating season, cooling is required to meet user needs. At the same time, this part of the heat will also be discharged during the heating season, resulting in energy loss. Generally, electric refrigerators are required for cooling, and waste heat recovery is required for winter heating, while higher hot water temperatures are generated to meet heating needs. At this time, conventional electric refrigerators cannot meet the needs. There is also a large amount of high-temperature heat in the industrial field. Winter heating generally uses heat exchange between high-temperature heat and hot water network water. The heat transfer temperature difference is large, the energy grade is seriously wasted, and the waste heat cannot be recovered. In view of this situation, there is an urgent need for a winter and summer dual-purpose unit that can realize the cooling function in the summer and generate high-temperature hot water while recovering waste heat in the winter to meet heating needs. Utility Model Content

[0003] (1) Purpose of the utility model

[0004] The purpose of the utility model is to provide a composite heat pump which can perform electric compression refrigeration in summer, recover waste heat in winter and generate high-temperature hot water.

[0005] (2) Technical solution

[0006] In order to solve the above problems, the utility model provides a compression-absorption composite heat pump for both winter and summer use, comprising an absorption heat pump, a compression refrigerator and a refrigerant three-way valve.

[0007] An absorption heat pump consists of a generator, a high-temperature condenser, an absorber, and a high-temperature evaporator; a compression chiller includes a low-temperature evaporator, a low-temperature condenser, a compressor, and a throttle valve. The refrigerant three-way valve is connected to the compressor refrigerant outlet, the low-temperature condenser refrigerant inlet, and the high-temperature evaporator refrigerant inlet, respectively. The refrigerant flows from the compressor to the low-temperature condenser or the high-temperature evaporator. The opening of the refrigerant three-way valve is adjustable, allowing the refrigerant at the compressor outlet to be directed entirely to the low-temperature condenser, entirely to the high-temperature evaporator, or divided into two parts, one for the low-temperature condenser and the other for the high-temperature evaporator.

[0008] The external pipeline of the absorption heat pump generator is connected to the external high-temperature heat source, the absorber is connected in series with the high-temperature condenser and is connected to the external hot water supply, the low-temperature evaporator of the compression refrigerator is connected to the external waste hot water, and the low-temperature condenser is connected to the external cooling water.

[0009] (3) Beneficial effects

[0010] The above-mentioned technical solution of the present invention has the following beneficial technical effects: the present invention can be divided into two working conditions: cooling and heating. In cooling working condition, only the compression heat pump works, which is driven by electricity, has high energy efficiency and low power consumption; in heating working condition, the compression heat pump and the absorption heat pump work in series, and the cooling function of the compression heat pump can still be maintained. The cooling capacity is used as waste heat, and after the combined temperature increase of the compression heat pump and the absorption heat pump, sufficient temperature is generated to be supplied to the outside, which makes full use of the high temperature rise characteristics of the absorption heat pump, and the overall operation management is reasonable. In addition, the three-way valve can also ensure the stability of the cooling capacity and adjust the heat load of the absorption heat pump according to the heat load demand. The present invention can meet all heating working conditions while ensuring the cooling demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an implementation method of the present utility model.

[0012] Reference numerals:

[0013] 1: Absorption heat pump; 2: Compression heat pump; 3: Refrigerant three-way valve; 11: Generator; 12: High-temperature condenser; 13: Absorber; 14: High-temperature evaporator; 21: Low-temperature evaporator; 22: Low-temperature condenser; 23: Compressor; 24: Throttle valve. DETAILED DESCRIPTION

[0014] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0015] Figure 1 It is a structural schematic diagram of an implementation method of the present utility model.

[0016] like Figure 1 As shown, the winter-summer dual-use compression-absorption composite heat pump comprises an absorption heat pump 1, a compression refrigerator 2, and a refrigerant three-way valve 3;

[0017] The absorption heat pump 1 includes a generator 11, a high-temperature condenser 12, an absorber 13, and a high-temperature evaporator 14. Each heat exchanger is internally connected via a solution pipe, a refrigerant water pipe, and a refrigerant steam pipe. The generator 11 and its external piping are connected to an external high-temperature heat source. The absorber 13 is connected in series with the high-temperature condenser 12 and is also connected to an external hot water supply.

[0018] The compression refrigerator 2 includes a low-temperature evaporator 21, a low-temperature condenser 22, a compressor 23, and a throttle valve 24. Each component is connected by a refrigerant pipe. The low-temperature evaporator 21 is connected to the external waste water, and the low-temperature condenser 22 is connected to the external cooling water.

[0019] The refrigerant three-way valve 3 is respectively connected to the refrigerant outlet of the compressor 23, the refrigerant inlet of the low-temperature condenser 22, and the refrigerant inlet of the high-temperature evaporator 14. Through the adjustment of the refrigerant three-way valve 3, the high-pressure refrigerant generated by the compressor 23 can flow entirely to the low-temperature condenser 22, entirely to the high-temperature evaporator 14, or partially to the low-temperature condenser 22 and the remainder to the high-temperature evaporator 14.

[0020] When the unit is operating, the compression chiller 2 cools according to the cooling load demand, and the heat generated can be discharged through the low-temperature condenser 22. If heating is required, the refrigerant three-way valve 3 can be adjusted according to the heat load to guide part or all of the high-temperature refrigerant into the high-temperature evaporator 14, and then the temperature is raised by the absorption heat pump 1. Driven by the high-temperature heat source of the generator 11, the waste heat is recovered and heated to heat the hot water flowing through the absorber 13 and the high-temperature condenser 12.

Claims

1. A compression absorption composite heat pump for both winter and summer use, characterized in that: It comprises an absorption heat pump (1), a compression refrigerator (2), and a refrigerant three-way valve (3); The absorption heat pump (1) comprises a generator (11), a high-temperature condenser (12), an absorber (13), and a high-temperature evaporator (14); The compression refrigerator (2) includes a low-temperature evaporator (21), a low-temperature condenser (22), a compressor (23), and a throttle valve (24); The refrigerant three-way valve (3) is respectively connected to the refrigerant outlet of the compressor (23), the refrigerant inlet of the low-temperature condenser (22), and the refrigerant inlet of the high-temperature evaporator (14), and the refrigerant flows from the compressor (23) to the low-temperature condenser (22) or the high-temperature evaporator (14).

2. The composite heat pump according to claim 1, characterized in that: The external pipeline of the generator (11) is connected to an external high-temperature heat source; The absorber (13) is connected in series with the high-temperature condenser (12) and is connected to an external hot water supply; The low-temperature evaporator (21) is connected to the external waste water; The low-temperature condenser (22) is connected to external cooling water.

3. The compound heat pump according to claim 1, characterized in that: The opening of the refrigerant three-way valve (3) is adjustable, and the refrigerant at the outlet of the compressor (23) can be introduced entirely into the low-temperature condenser (22), entirely into the high-temperature evaporator (14), or introduced in two parts into the low-temperature condenser (22) and the high-temperature evaporator (14).

Images