Energy-saving heat pump unit for cleaning

Abstract

The utility model relates to the technical field of mold cleaning equipment, and discloses an energy-saving type cleaning heat pump unit which comprises a rack, a water-water heat exchanger, a second heat recoverer and two sets of heat pump unit assemblies are installed on the rack, and each heat pump unit assembly comprises a first heat recoverer, a condenser, a drying filter, an electronic expansion valve and an evaporator which are sequentially connected. The heat pump unit is used as a heat source, so that the energy utilization efficiency is improved; low-grade hot water obtained by means of factory air compressor heat recovery and the like is used as a heat source, and the energy utilization efficiency is improved; heat of discharged water of the cleaning machine is recycled, and the energy utilization efficiency is improved; double-compressor two-section type heating is adopted, the average condensation temperature is reduced, the heating efficiency of the heat pump unit is improved, a heat recovery mode is adopted, refrigerant high-temperature section sensible heat is used as a high-temperature section heating mode, the average condensation temperature is reduced, the heating efficiency of the heat pump unit is improved, energy is saved, and the electricity cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mold cleaning equipment, in particular to an energy-saving heat pump unit for cleaning. Background Art

[0002] Mould cleaning equipment is an effective cleaning equipment for cleaning sulfides, gas residues, plastic residues, oil, rust and other treatments on the mould surface.

[0003] Moulds are widely used in various fields of industrial production, and the energy consumption of heating hot water for mould cleaning is also an important part of factory energy consumption that cannot be ignored.

[0004] After searching, the patent with application number CN201510918593.4 discloses a water-source heat pump unit, including a four-way valve, a compressor, a user-side heat exchanger and a heat source-side heat exchanger. The four-way valve has four ports D, C, S and E. The D port is connected to the output end of the compressor through a pipeline, the S port is connected to the input end of the compressor through a pipeline, the C port is connected to one end of the heat source-side heat exchanger through a pipeline, the other end of the heat source-side heat exchanger is connected to one end of the user-side heat exchanger through a two-way pipeline, and the other end of the user-side heat exchanger is connected to the E port through a pipeline. The heat exchange area of ​​the user-side heat exchanger is 1.03 to 2.00 times that of the heat exchange area of ​​the heat source-side heat exchanger. The invention fully improves the energy efficiency ratio of cooling and heating by reasonably matching the heat exchange area of ​​the user-side heat exchanger and the heat source-side heat exchanger, making the condensation temperature during heating more reasonable, and reducing the input power of the entire unit. At the same time, it can also extend the cleaning cycle of the user-side heat exchanger and the heat source-side heat exchanger.

[0005] At present, there are two ways to heat hot water for mold cleaning: boiler and electric heating. With the improvement of environmental protection requirements, small boilers are gradually banned and electric heating is more popular. However, electric heating has low efficiency, high energy consumption and high electricity cost. Therefore, we need to propose an energy-saving heat pump unit for cleaning. Utility Model Content

[0006] The purpose of the utility model is to provide an energy-saving heat pump unit for cleaning, which adopts a heat pump unit as a heat source to improve energy utilization efficiency; uses low-grade hot water obtained by factory air compressor heat recovery and other methods as a heat source to improve energy utilization efficiency; recycles and utilizes the heat of cleaning machine drainage to improve energy utilization efficiency; adopts a dual-compressor two-stage heating method to reduce the average condensing temperature and improve the heating efficiency of the heat pump unit; adopts a heat recovery method to utilize the sensible heat of the high-temperature section of the refrigerant as a high-temperature section heating method, which reduces the average condensing temperature and improves the heating efficiency of the heat pump unit, thereby saving energy and reducing the cost of electricity use, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an energy-saving heat pump unit for cleaning, comprising a frame, on which a water-to-water heat exchanger, a heat recovery device 2 and two groups of heat pump components are installed, the heat pump components comprising a heat recovery device 1, a condenser, a drying filter, an electronic expansion valve and an evaporator connected in sequence, the two groups of condensers are connected by pipelines, a bypass valve is connected between the two groups of heat recovery devices 1, a low-pressure gauge is connected to the evaporator, a high-pressure gauge is connected to the heat recovery device 1, a compressor and a high-low pressure gauge arranged in parallel are connected between the low-pressure gauge and the high-pressure gauge, one end of the heat recovery device 2 is connected to one of the condensers, and both of the evaporators are connected to the water-to-water heat exchanger.

[0008] Preferably, it also includes a connected water filter, a cleaning machine and a hot water tank, a flow switch 1 is connected between the bypass valve and the hot water tank, a hot water pump is connected between the hot water tank and the cleaning machine, and one end of the water filter is connected to a heat recovery device 2.

[0009] Preferably, it also includes a connected cold water tank and purification equipment, the cold water tank is connected to the water-to-water heat exchanger, the water-to-water heat exchanger is also connected to a second flow switch, one end of the cold water tank is connected to a water pump, and the purification equipment and the water pump are both connected to a second heat recovery device.

[0010] Preferably, a pressure sensor is connected between the compressor and the evaporator.

[0011] Preferably, one end of the pipe connected to the bypass valve is provided with a hot water outlet one, one end of the three pipes connected to one side of the heat recovery device two is respectively provided with a hot water outlet two, a hot water inlet and a cold water inlet, and one end of the two pipes connecting the water-to-water heat exchanger and the two evaporators is respectively connected with a hot water outlet three and a hot water inlet.

[0012] Preferably, two pipes connected to one side of the water-to-water heat exchanger are respectively connected to a pure water outlet and a pure water inlet.

[0013] Preferably, the hot water outlet one is a ℃ hot water outlet, the hot water outlet two is a ℃ hot water outlet for a cleaning machine, the hot water outlet three is a ℃ hot water outlet for heat recovery of an air compressor, the hot water inlet is a ℃ hot water inlet for heat recovery of an air compressor, the hot water inlet is a ℃ hot water inlet for a cleaning machine, the cold water inlet is a ℃ cold water inlet, the pure water outlet is a ℃ pure water outlet, and the pure water inlet is a ℃ pure water inlet.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model adopts a heat pump unit as a heat source to improve energy utilization efficiency; uses low-grade hot water obtained by factory air compressor heat recovery and other methods as a heat source to improve energy utilization efficiency; recycles and utilizes the heat of cleaning machine drainage to improve energy utilization efficiency; adopts a dual-compressor two-stage heating method to reduce the average condensing temperature and improve the heating efficiency of the heat pump unit; adopts a heat recovery method to utilize the sensible heat of the high-temperature section of the refrigerant as a high-temperature section heating method, reduces the average condensing temperature and improves the heating efficiency of the heat pump unit, thereby saving energy and reducing electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric drawing of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a front view of the utility model;

[0019] Figure 4 It is a top view of the utility model;

[0020] Figure 5 It is a schematic diagram of the cleaning process of the utility model.

[0021] In the figure: 1. Rack; 101. Low pressure gauge; 102. High pressure gauge; 2. Electric control box; 3. Compressor; 4. High and low pressure; 5. Heat recovery device 1; 6. Condenser; 7. Evaporator; 8. Water-to-water heat exchanger; 9. Heat recovery device 2; 11. Hot water outlet 1; 12. Hot water outlet 2; 13. Hot water outlet 3; 14. Hot water inlet; 15. Hot water inlet; 16. Cold water inlet; 17. Pure water outlet; 18. Pure water inlet; 19. Bypass valve; 20. Flow switch 1; 201. Flow switch 2; 21. Dry filter; 22. Electronic expansion valve; 23. Pressure sensor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0023] See also Figure 1-5The utility model provides a technical solution: an energy-saving heat pump unit for cleaning, comprising a frame 1, an electric control box 2 is installed on the frame 1, comprising a water-to-water heat exchanger 8, a heat recovery device 2 9 and two groups of heat pump components are installed on the frame 1, the heat pump component comprises a heat recovery device 1 5, a condenser 6, a drying filter 21, an electronic expansion valve 22 and an evaporator 7 connected in sequence, the two groups of condensers 6 are connected by pipelines, a bypass valve 19 is connected between the two groups of heat recovery devices 1 5, a low pressure gauge 101 is connected to the evaporator 7, a high pressure gauge 102 is connected to the heat recovery device 1 5, a compressor 3 and a high and low pressure gauge 4 arranged in parallel are connected between the low pressure gauge 101 and the high pressure gauge 102, one end of the heat recovery device 2 9 is connected to one of the condensers 6, and the two evaporators 7 are both connected to the water-to-water heat exchanger 8.

[0024] Two low-pressure meters 101 and two high-pressure meters 102 are provided, and the two low-pressure meters 101 and the two high-pressure meters 102 are arranged alternately.

[0025] A temperature sensor is installed between the evaporator 7 and the compressor 3, and a temperature sensor is also installed on the pipes between the two condensers 6 and between the two heat recovery devices 5. Temperature sensors are also installed on the 20°C pure water inlet pipe on the water-to-water heat exchanger 8, the air compressor heat recovery hot water outlet pipe of the water-to-water heat exchanger 8, the air compressor heat recovery hot water inlet pipe of the water-to-water heat exchanger 8, the pipe between the water-to-water heat exchanger 8 and the cold water tank, the pipe between the heat recovery device 29 and the water pump, the pipe between the heat recovery device 29 and the purification equipment, the pipe between the heat recovery device 29 and the water filter, and the pipe between the heat recovery device 15 and the hot water tank.

[0026] It also includes a connected water filter, a cleaning machine and a hot water tank. A flow switch 20 is connected between the bypass valve 19 and the hot water tank. A hot water pump is connected between the hot water tank and the cleaning machine. One end of the water filter is connected to a heat recovery device 9.

[0027] It also includes a connected cold water tank and purification equipment. The cold water tank is connected to a water-to-water heat exchanger 8. A flow switch 201 is also connected to the water-to-water heat exchanger 8. A water pump is connected to one end of the cold water tank. The purification equipment and the water pump are both connected to a heat recovery device 29.

[0028] The cold water tank delivers 45°C cold water to the heat recovery device 29 through a water pump. The heat recovery device 29 heats the 45°C cold water to 60°C. The condenser 6 heats the 60°C hot water to 75°C. The 75°C hot water passes through the drying filter 21 and is throttled by the electronic expansion valve 22 to become a low-temperature and low-pressure refrigerant. The refrigerant absorbs the heat of the air compressor heat recovery hot water in the evaporator 7 and is completely vaporized, and then returns to the suction port of the compressor 3, and the cycle continues.

[0029] The heat recovery device 29 heats the cold water at 45°C to 60°C, and the condenser 6 in another low-temperature section heats it to 70°C, and then the condenser 6 in the high-temperature section heats it to 75°C, and then the heat recovery device 29 in the two refrigerant sections heats it to 80°C and is sent to the cleaning machine for use.

[0030] A pressure sensor 23 is connected between the compressor 3 and the evaporator 7 .

[0031] One end of the pipe connected to the bypass valve 19 is provided with a hot water outlet 11, one end of the three pipes connected to one side of the heat recovery device 2 9 are respectively provided with a hot water outlet 2 12, a hot water inlet 15 and a cold water inlet 16, and one end of the two pipes used to connect the water-to-water heat exchanger 8 and the two evaporators 7 are respectively connected with a hot water outlet 3 13 and a hot water inlet 14.

[0032] The two pipes connected to one side of the water-to-water heat exchanger 8 are respectively connected to a pure water outlet 17 and a pure water inlet 18 .

[0033] Hot water outlet 11 is an 80°C hot water outlet, hot water outlet 2 12 is a 50°C hot water outlet for a cleaning machine, hot water outlet 3 13 is a heat recovery hot water outlet for an air compressor, hot water inlet 14 is a heat recovery hot water inlet for an air compressor, hot water inlet 15 is a 65°C hot water inlet for a cleaning machine, cold water inlet 16 is a 45°C cold water inlet, pure water outlet 17 is a 45°C pure water outlet, and pure water inlet 18 is a 20°C pure water inlet.

[0034] When in use, the refrigerant circulates: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor flows through the heat recovery device 5, heats the 75°C hot water to 80°C, and then passes through the condenser 6 to heat the 60°C to 75°C. The refrigerant dissipates heat and condenses into liquid refrigerant, then flows through the drying filter 21, and then passes through the electronic expansion valve 22 to throttle it into a low-temperature and low-pressure refrigerant. In the evaporator 7, it absorbs the heat of the hot water recovered from the air compressor and is completely vaporized, and then returns to the suction port of the compressor 3, and the cycle continues.

[0035] Water circulation: 45℃ cold water is heated to 60℃ through heat recovery device 29, then heated to 70℃ through condenser 6 in the low temperature section, then heated to 75℃ through condenser 6 in the high temperature section, and then heated to 80℃ through heat recovery devices 29 in two refrigerant sections and sent to the cleaning machine for use. There is an electric bypass valve 19 in front of the high temperature section heat recovery device 15, which can fine-tune the constant water outlet temperature to 80℃ by adjusting the bypass water volume.

[0036] The heat recovery device 29 heats the 45°C hot water to 60°C by recovering the heat in the washing machine drainage (65°C).

[0037] The pure water replenishment is heated from 20°C to 45°C by using the heat of the hot water recovered by the air compressor through the water-to-water heat exchanger 8.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving cleaning heat pump unit, comprising a frame (1), characterized in that: The frame (1) is equipped with a water-to-water heat exchanger (8), a heat recovery device (2) and two groups of heat pump components. The heat pump components include a heat recovery device (5), a condenser (6), a drying filter (21), an electronic expansion valve (22) and an evaporator (7) which are connected in sequence. The two groups of condensers (6) are connected via a pipeline. A bypass valve (19) is connected between the two groups of heat recovery devices (1) . The evaporator (7) is connected with a low pressure gauge (101). The heat recovery device (5) is connected with a high pressure gauge (102). A compressor (3) and a high and low pressure gauge (4) arranged in parallel are connected between the low pressure gauge (101) and the high pressure gauge (102). One end of the heat recovery device (2) is connected to one of the condensers (6). Both evaporators (7) are connected to the water-to-water heat exchanger (8).

2. The energy-saving cleaning heat pump unit according to claim 1, characterized in that: It also includes a connected water filter, a cleaning machine and a hot water tank, a flow switch 1 (20) is connected between the bypass valve (19) and the hot water tank, a hot water pump is connected between the hot water tank and the cleaning machine, and one end of the water filter is connected to a heat recovery device 2 (9).

3. The energy-saving cleaning heat pump unit according to claim 1, characterized in that: It also includes a connected cold water tank and purification equipment, the cold water tank is connected to a water-to-water heat exchanger (8), the water-to-water heat exchanger (8) is also connected to a flow switch 2 (201), one end of the cold water tank is connected to a water pump, and the purification equipment and the water pump are both connected to a heat recovery device 2 (9).

4. The energy-saving cleaning heat pump unit according to claim 1, characterized in that: A pressure sensor (23) is connected between the compressor (3) and the evaporator (7).

5. The energy-saving cleaning heat pump unit according to claim 1, characterized in that: One end of the pipe connected to the bypass valve (19) is provided with a hot water outlet 1 (11), one end of the three pipes connected to one side of the heat recovery device 2 (9) is respectively provided with a hot water outlet 2 (12), a hot water inlet (15) and a cold water inlet (16), and one end of the two pipes used to connect the water-to-water heat exchanger (8) and the two evaporators (7) is respectively connected with a hot water outlet 3 (13) and a hot water inlet (14).

6. The energy-saving cleaning heat pump unit according to claim 5, characterized in that: Two pipes connected to one side of the water-to-water heat exchanger (8) are respectively connected to a pure water outlet (17) and a pure water inlet (18).

7. The energy-saving cleaning heat pump unit according to claim 6, characterized in that: The hot water outlet one (11) is an 80°C hot water outlet, the hot water outlet two (12) is a 50°C hot water outlet for a cleaning machine, the hot water outlet three (13) is a heat recovery hot water outlet for an air compressor, the hot water inlet (14) is a heat recovery hot water inlet for an air compressor, the hot water inlet (15) is a 65°C hot water inlet for a cleaning machine, the cold water inlet (16) is a 45°C cold water inlet, the pure water outlet (17) is a 45°C pure water outlet, and the pure water inlet (18) is a 20°C pure water inlet.

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