Refrigerant waste heat recovery device

Abstract

The utility model belongs to the technical field of cold water heating, and particularly relates to a refrigerant waste heat recovery device. Comprising a compressor, a high-pressure switch, a hot water heat exchanger, an evaporative condenser, a circulating pipeline, a capillary tube and a low-pressure switch, the compressor, the high-pressure switch, the hot water heat exchanger, the evaporative condenser and the low-pressure switch are sequentially communicated end to end, an electronic expansion valve is arranged on the circulating pipeline, and the two ends of the circulating pipeline are communicated with the evaporative condenser. And the capillary tube is respectively communicated with the first communicating tube and the low-voltage switch. The electronic expansion valve is arranged on the first communicating pipe, so that the low-temperature and low-pressure gaseous refrigerant can return to the evaporative condenser through the electronic expansion valve, residual heat in the evaporative condenser is absorbed by the low-temperature and low-pressure gaseous refrigerant, and heat loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold water heating, and particularly relates to a refrigerant waste heat recovery device. Background Art

[0002] Traditional air source heat pumps use finned evaporators to collect heat from the air for heating; water source heat pumps use water evaporators to collect heat from the water for heating.

[0003] However, when heat flows in the pipe with water and other media, it is easy to remain in the condenser, resulting in a large loss of heat. Therefore, it is necessary to design a refrigerant waste heat recovery device to solve the above problem. Utility Model Content

[0004] In view of the above problems, the utility model provides a refrigerant waste heat recovery device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a refrigerant waste heat recovery device, comprising a compressor, a high-pressure switch, a hot water heat exchanger, an evaporative condenser, a circulation pipeline, a capillary tube and a low-pressure switch, wherein the compressor, the high-pressure switch, the hot water heat exchanger, the evaporative condenser and the low-pressure switch are connected end to end in sequence, an electronic expansion valve is provided on the circulation pipeline, and both ends are connected to the evaporative condenser, and the capillary tube is respectively connected to the circulation pipeline and the low-pressure switch.

[0006] Furthermore, the refrigerant waste heat recovery device also includes a filter, which is arranged on the circulation pipeline and located between the electronic expansion valve and the filter, and the connection point between the capillary tube and the circulation pipeline is located between the electronic expansion valve and the filter.

[0007] Furthermore, the refrigerant waste heat recovery device also includes a solenoid valve, and the solenoid valve is arranged on the capillary tube.

[0008] Furthermore, the refrigerant waste heat recovery device also includes a separator, and the separator is arranged between the solenoid valve and the low-pressure switch.

[0009] Furthermore, the capillary tube is also connected to the evaporative condenser.

[0010] Technical effects and advantages of the utility model:

[0011] 1. By setting an electronic expansion valve on the circulation pipeline, the low-temperature and low-pressure gaseous refrigerant can return to the evaporative condenser through the electronic expansion valve, and the low-temperature and low-pressure gaseous refrigerant is used to absorb the residual heat in the evaporative condenser, thereby reducing heat loss.

[0012] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The schematic diagram of the structure of the refrigerant waste heat recovery device of the embodiment of the utility model is shown.

[0015] Figure numerals: 1. compressor; 21. high pressure switch; 22. low pressure switch; 3. hot water heat exchanger; 31. water inlet; 32. water outlet; 4. evaporative condenser; 51. circulation pipe; 52. capillary tube; 53. electronic expansion valve; 54. solenoid valve; 6. filter; 7. separator. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1 As shown, a refrigerant waste heat recovery device of an embodiment of the utility model includes a compressor 1, a high-pressure switch 21, a hot water heat exchanger 3, an evaporative condenser 4, a circulation pipe 51, a capillary tube 52 and a low-pressure switch 22. The compressor 1, the high-pressure switch 21, the hot water heat exchanger 3, the evaporative condenser 4 and the low-pressure switch 22 are connected end to end in sequence. An electronic expansion valve 53 is provided on the circulation pipe 51, and both ends are connected to the evaporative condenser 4. The capillary tube 52 is respectively connected to the circulation pipe 51 and the low-pressure switch 22.

[0018] In this embodiment, by starting the compressor 1, the high-temperature and high-pressure gaseous refrigerant passes through the high-pressure switch 21 and enters the hot water heat exchanger 3. The hot water heat exchanger 3 is provided with a water inlet 31 and a water outlet 32. Cold water is introduced into the water inlet 31, and the high-temperature and high-pressure gaseous refrigerant is converted into a high-temperature and high-pressure liquid refrigerant through heat exchange with the cold water. The cold water is heated into hot water, and the hot water is discharged from the water outlet 32; the high-temperature and high-pressure liquid refrigerant passes through the evaporative condenser 4 and is converted into a low-temperature and high-pressure gaseous refrigerant; the low-temperature and high-pressure gaseous refrigerant is diverted through the electronic expansion valve 53 and the capillary 52 and converted into a low-temperature and low-pressure gaseous refrigerant; the low-temperature and low-pressure gaseous refrigerant enters the compressor 1 through the low-pressure switch 22.

[0019] Therefore, by arranging the electronic expansion valve 53 on the circulation pipe 51, the low-temperature and low-pressure gaseous refrigerant can return to the evaporative condenser 4 through the electronic expansion valve 53, and the low-temperature and low-pressure gaseous refrigerant is used to absorb the residual heat in the evaporative condenser 4, and then the low-temperature and low-pressure gaseous refrigerant is input into the compressor 1, which can reduce the energy consumption of the compressor 1 in converting the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, thereby reducing heat loss.

[0020] Alternatively, if Figure 1 As shown, the refrigerant waste heat recovery device also includes a filter 6, which is arranged on the circulation pipe 51 and located between the electronic expansion valve 53 and the filter 6, and the connection point between the capillary tube 52 and the circulation pipe 51 is located between the electronic expansion valve 53 and the filter 6.

[0021] In this embodiment, a filter 6 is provided on the circulation pipe 51. The low-temperature and high-pressure gaseous refrigerant in the evaporative condenser 4 passes through the filter 6 and then is diverted through the electronic expansion valve 53 and the capillary tube 52. The filter 6 can remove impurities in the low-temperature and high-pressure gaseous refrigerant to prevent the electronic expansion valve 53 and the capillary tube 52 from being blocked.

[0022] Alternatively, if Figure 1 As shown, the refrigerant waste heat recovery device further includes a solenoid valve 54 , and the solenoid valve 54 is disposed on the capillary tube 52 .

[0023] In this embodiment, a solenoid valve 54 is provided on the capillary tube 52, and the on and off of the solenoid valve 54 can be controlled. For example, after the solenoid valve 54 is closed, the low-temperature and high-pressure gaseous refrigerant circulates multiple times in the evaporative condenser 4 and the circulation pipe 51, so that the low-temperature and high-pressure gaseous refrigerant absorbs more heat in the evaporative condenser 4 and passes through the filter 6 for impurities removal multiple times.

[0024] Alternatively, if Figure 1As shown, the refrigerant waste heat recovery device also includes a separator 7, and the separator 7 is arranged between the solenoid valve 54 and the low-pressure switch 22.

[0025] In this embodiment, the low-temperature and low-pressure gaseous refrigerant passes through the capillary tube 52 and the low-pressure switch 22 and then enters the compressor 1. By setting up the separator 7, the moisture in the low-temperature and low-pressure gaseous refrigerant can be removed, so that only the low-temperature and low-pressure gaseous refrigerant is transmitted back to the compressor 1, thereby preventing the compressor 1 from heating substances other than the low-temperature and low-pressure gaseous refrigerant and reducing heat loss.

[0026] Alternatively, if Figure 1 As shown, the capillary tube 52 is also connected to the evaporative condenser 4 .

[0027] In this embodiment, the capillary tube 52 is also connected to the evaporative condenser 4, so a portion of the low-temperature and low-pressure gaseous refrigerant can return to the evaporative condenser 4, and further absorb the residual heat in the evaporative condenser 4, which is beneficial to further reduce heat loss.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigerant waste heat recovery device, characterized in that: The invention comprises a compressor (1), a high-pressure switch (21), a hot water heat exchanger (3), an evaporative condenser (4), a circulation pipeline (51), a capillary tube (52) and a low-pressure switch (22); the compressor (1), the high-pressure switch (21), the hot water heat exchanger (3), the evaporative condenser (4) and the low-pressure switch (22) are connected end to end in sequence; an electronic expansion valve (53) is provided on the circulation pipeline (51), and both ends are connected to the evaporative condenser (4); the capillary tube (52) is connected to the circulation pipeline (51) and the low-pressure switch (22) respectively.

2. The refrigerant waste heat recovery device according to claim 1, characterized in that: The invention also comprises a filter (6), wherein the filter (6) is arranged on the circulation pipe (51) and is located between the electronic expansion valve (53) and the filter (6), and the connection point between the capillary tube (52) and the circulation pipe (51) is located between the electronic expansion valve (53) and the filter (6).

3. The refrigerant waste heat recovery device according to claim 2, characterized in that: It also includes a solenoid valve (54), wherein the solenoid valve (54) is arranged on the capillary tube (52).

4. The refrigerant waste heat recovery device according to claim 3, characterized in that: It also includes a separator (7), which is arranged between the solenoid valve (54) and the low-pressure switch (22).

5. The refrigerant waste heat recovery device according to claim 1, characterized in that: The capillary tube (52) is also connected to the evaporative condenser (4).

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