Preheater of heat pump system

Abstract

The utility model relates to the technical field of wastewater treatment, and particularly discloses a preheater of a heat pump system. And the pressure adjusting plate is installed in the liquid refrigerant inlet pipe, a plurality of conical holes are formed in the pressure adjusting plate, and the ends, with small calibers, of the conical holes face the interior of the preheating cylinder. According to the utility model, the liquid refrigerant entering the preheating cylinder passes through the plurality of conical holes in the pressure regulating plate, so that the flow rate of the liquid refrigerant is increased, and the liquid refrigerant is easy to form a jet state after passing through the conical holes, so that the liquid refrigerant is dispersed, and the liquid refrigerant can absorb heat in the preheating cylinder at the first time; therefore, the liquid refrigerant is preheated more uniformly, the evaporation rate of the liquid refrigerant during subsequent evaporation is relatively consistent, the evaporation efficiency of the liquid refrigerant is improved, and the heat cycle efficiency of the heat pump system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wastewater treatment technical field especially relates to a preheater of heat pump system. BACKGROUND

[0002] The heat pump evaporation technology is a new type of evaporation technology which recycles and reuses the heat energy of secondary steam by using a heat pump system to improve energy utilization efficiency and reduce energy consumption. The heat pump system plays a key role in industrial wastewater treatment.

[0003] Industrial wastewater enters the distillation kettle, and the steam generated by the steam generator exchanges heat with the wastewater in the evaporation kettle, so that the wastewater evaporates to generate steam. The steam is then condensed into condensate by the steam condenser. This condensate can be directly discharged, thereby reducing the discharge cost of industrial wastewater. When the steam condenser condenses the steam, the steam needs to be exchanged to slowly change into a liquid state. However, due to the large flow of steam, the steam condenser cannot completely condense the steam into a liquid state, so there will be excess steam. In order to improve the heat utilization rate of the heat pump system, these steam is generally introduced into the refrigerant evaporator. The refrigerant evaporator absorbs the heat of the steam and converts the refrigerant into high-temperature gaseous refrigerant, while the steam is converted into liquid. The high-temperature gaseous refrigerant is then introduced into the refrigerant condenser inside the steam generator. The refrigerant condenser inside the steam generator converts the high-temperature gaseous refrigerant into liquid while releasing heat. The heat is absorbed and utilized by the steam generator, thereby improving the heat utilization rate of the heat pump system. The liquid refrigerant then enters the refrigerant evaporator to evaporate, thereby forming a cycle. Before the liquid refrigerant enters the refrigerant evaporator, it needs to be preheated by a preheater. The existing preheater is not uniform in preheating the refrigerant, i.e., there is a temperature gradient during the preheating process, with some areas having too high a temperature and other areas having too low a temperature. This may result in inconsistent evaporation rates of the non-uniformly preheated refrigerant when it enters the refrigerant evaporator to evaporate, thereby reducing the evaporation efficiency and further reducing the heat cycle efficiency of the heat pump system. SUMMARY

[0004] The utility model discloses a preheater of heat pump system to solve the technical problem of the preheater of prior art in the preheating of refrigerant is not uniform, which may result in inconsistent evaporation rates of the non-uniformly preheated refrigerant when it enters the refrigerant evaporator to evaporate, thereby reducing the evaporation efficiency and further reducing the heat cycle efficiency of the heat pump system.

[0005] The utility model discloses a preheater of heat pump system to solve the technical problem of the preheater of prior art in the preheating of refrigerant is not uniform, which may result in inconsistent evaporation rates of the non-uniformly preheated refrigerant when it enters the refrigerant evaporator to evaporate, thereby reducing the evaporation efficiency and further reducing the heat cycle efficiency of the heat pump system.

[0006] A preheater of heat pump system, comprising a preheating cylinder, a liquid refrigerant outlet pipe and a preheating assembly, the preheater further comprises:

[0007] A liquid refrigerant inlet pipe is installed on the preheating cylinder, and the liquid refrigerant inlet pipe is obliquely arranged so that the refrigerant first contacts the inner wall of the preheating cylinder when entering the preheating cylinder through the liquid refrigerant inlet pipe.

[0008] A pressure regulating plate is installed in the liquid refrigerant inlet pipe, and a plurality of tapered holes are formed in the pressure regulating plate, and the small end of the tapered hole is directed to the preheating cylinder.

[0009] As a preferred embodiment of the above technical solution, an annular cavity is formed in the inner wall of the preheating cylinder, and a preheating assembly is installed in the annular cavity, the preheating assembly comprises a first water inlet pipe and a second water inlet pipe, the first water inlet pipe and the second water inlet pipe are both spiral, and the first water inlet pipe and the second water inlet pipe are cross-positioned.

[0010] As a preferred embodiment of the above technical solution, the two ends of the first water inlet pipe are a first water inlet and a first water outlet, and the two ends of the second water inlet pipe are a second water inlet and a second water outlet, hot water enters the first water inlet pipe through the first water inlet and flows downward in a spiral manner and is discharged from the first water outlet, and hot water enters the second water inlet pipe through the second water inlet and flows upward in a spiral manner and is discharged from the second water outlet.

[0011] As a preferred embodiment of the above technical solution, a driving member is installed at the top end of the preheating cylinder, an output end of the driving member is provided with a stirring rod, and the stirring rod extends into the preheating cylinder.

[0012] As a preferred embodiment of the above technical solution, a temperature measuring assembly is installed on the stirring rod, and an electric control valve is installed on the liquid refrigerant outlet pipe, and the temperature measuring assembly and the electric control valve are connected with an external control unit, and when the refrigerant in the preheating cylinder reaches a certain temperature, the electric control valve is opened to discharge the liquid refrigerant.

[0013] As a preferred embodiment of the above technical solution, a filter screen is installed in the liquid refrigerant inlet pipe, and the filter screen is located at the front end of the pressure regulating plate.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. In the present application, the liquid refrigerant entering the preheating cylinder passes through the plurality of tapered holes on the pressure regulating plate, so that the flow rate of the liquid refrigerant increases, and the liquid refrigerant is easily in a jet state after passing through the tapered holes, so that the liquid refrigerant is dispersed, and the liquid refrigerant can absorb the heat in the preheating cylinder in the first time, thereby preheating the liquid refrigerant, thereby making the preheating of the liquid refrigerant more uniform, thereby making the evaporation rate of the liquid refrigerant subsequent evaporation relatively consistent, thereby improving the evaporation efficiency of the liquid refrigerant, and further improving the heat cycle efficiency of the heat pump system.

[0016] 2. The utility model discloses, through the setting cross staggered water inlet pipe no. 1 and water inlet pipe no. 2, make the flowing direction of hot water from water inlet pipe no. 1 and from water inlet pipe no. 2 opposite, like this can be located in the liquid coolant of preheating cylinder from top to bottom and from bottom to top synchronous preheating, thereby make the liquid coolant of preheating cylinder in height does not exist temperature difference, make the preheating of liquid coolant more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is whole structure schematic diagram for the utility model;

[0018] Figure 2 It is inside structure schematic diagram for preheating cylinder;

[0019] Figure 3 It is structure schematic diagram for pressure regulating plate;

[0020] Figure 4 It is structure schematic diagram for water inlet pipe no. 1 and water inlet pipe no. 2.

[0021] In the drawing:

[0022] 1, preheating cylinder;2, liquid coolant inlet pipe;3, liquid coolant outlet pipe;31, electric control valve;4, filter screen;5, pressure regulating plate;51, conical hole;6, annular cavity;7, water inlet pipe no. 1;71, water inlet no. 1;72, drain no. 1;8, water inlet pipe no. 2;81, water inlet no. 2;82, drain no. 2;9, stirring rod;91, temperature measuring component;10, driving part;11, preheating component. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] As Figures 1-3 shown, a preheater of heat pump system includes preheating cylinder 1, liquid coolant outlet pipe 3 and preheating component 11, and the preheater further includes:

[0025] Liquid coolant inlet pipe 2 is installed on preheating cylinder 1, and liquid coolant inlet pipe 2 is inclinedly arranged, so that when the coolant enters preheating cylinder 1 through liquid coolant inlet pipe 2, the coolant first contacts the inner wall of preheating cylinder 1.

[0026] Pressure regulating plate 5 is installed in liquid coolant inlet pipe 2, and a plurality of conical holes 51 are formed in pressure regulating plate 5, and the end of the small diameter of the conical hole 51 faces preheating cylinder 1.

[0027] In actual application, the liquid refrigerant is discharged from the refrigerant condenser in the steam generator, enters the preheating cylinder 1 through the liquid refrigerant inlet pipe 2, and contacts the pressure regulating plate 5 before entering the preheating cylinder 1. Since the pressure regulating plate 5 is provided with a plurality of tapered holes 51, the flow rate of the liquid refrigerant increases under the same pressure, and the liquid refrigerant is easily in a jet state after passing through the tapered holes 51, so that the liquid refrigerant is dispersed. The liquid refrigerant can absorb the heat in the preheating cylinder 1 in the first time, thereby preheating the liquid refrigerant. Compared with the prior art in which the liquid refrigerant is directly introduced into the preheating cylinder 1, the liquid refrigerant in the middle position of the preheating cylinder 1 is heated for a long time, thereby causing uneven preheating of the liquid refrigerant. The liquid refrigerant is preheated in the first time, thereby making the preheating of the liquid refrigerant more uniform, and the evaporation rate of the liquid refrigerant is relatively consistent during subsequent evaporation, thereby improving the evaporation efficiency of the liquid refrigerant and the heat cycle efficiency of the heat pump system.

[0028] As shown in Figure 2 and Figure 4 , the inner wall of the preheating cylinder 1 is provided with an annular cavity 6, and the preheating assembly 11 is installed in the annular cavity 6. The preheating assembly 11 includes a water inlet pipe one 7 and a water inlet pipe two 8. The water inlet pipe one 7 and the water inlet pipe two 8 are both spiral, and the water inlet pipe one 7 and the water inlet pipe two 8 are cross-positioned.

[0029] Further, the two ends of the water inlet pipe one 7 are a water inlet one 71 and a water outlet one 72, respectively, and the two ends of the water inlet pipe two 8 are a water inlet two 81 and a water outlet two 82, respectively. Hot water enters the water inlet pipe one 7 through the water inlet one 71 and flows downward spirally and is discharged from the water outlet one 72. Hot water enters the water inlet pipe two 8 through the water inlet two 81 and flows upward spirally and is discharged from the water outlet two 82.

[0030] In actual application, the flow directions of the hot water entering from the water inlet pipe one 7 and the water inlet pipe two 8 are opposite, so that the liquid refrigerant in the preheating cylinder 1 can be preheated from top to bottom and from bottom to top at the same time, thereby eliminating the temperature difference in height of the liquid refrigerant in the preheating cylinder 1 and making the preheating of the liquid refrigerant more uniform.

[0031] After the liquid refrigerant forms a jet state by passing through the tapered holes 51, the liquid refrigerant is sprayed onto the inner wall of the preheating cylinder 1. Since the inner wall of the preheating cylinder 1 is heated by the preheating assembly 11, the liquid refrigerant can be preheated in the first time while ensuring the preheating efficiency, thereby indirectly improving the heat cycle efficiency of the heat pump system.

[0032] As shown in Figure 2 , the preheating cylinder 1 is provided with a driving member 10 at the top end, and the output end of the driving member 10 is provided with a stirring rod 9 which extends into the preheating cylinder 1.

[0033] A temperature measuring component 91 is installed on the stirring rod 9, and an electric control valve 31 is installed on the liquid refrigerant outlet pipe 3. Both the temperature measuring component 91 and the electric control valve 31 are connected to an external control unit. When the refrigerant in the preheating cylinder 1 reaches a certain temperature, the electric control valve 31 opens to discharge the liquid refrigerant.

[0034] In one embodiment, the driving component 10 may be a motor or other component capable of driving the stirring rod 9 to rotate; the temperature measuring component 91 may be an electronic thermometer, and the external control unit may be a computer terminal.

[0035] In practical application, the driving component 10 causes the stirring rod 9 to rotate, thereby stirring the liquid refrigerant and making the liquid refrigerant heat evenly, thus making the preheating of the liquid refrigerant more uniform.

[0036] The temperature sensing component 91 can detect the temperature of the liquid refrigerant located at the center of the preheating cylinder 1. When the liquid refrigerant reaches a certain temperature, the temperature sensing component 91 transmits a signal to the external control unit, which then controls the electric control valve 31 to open, thereby allowing the preheated liquid refrigerant to be discharged into the refrigerant evaporator. This effectively avoids overheating of the liquid refrigerant and prevents premature partial or complete evaporation due to excessively high liquid refrigerant temperature, thus avoiding a reduction in evaporation efficiency and a reduction in the heat pump system's thermal cycle efficiency.

[0037] like Figure 3 As shown, a filter screen 4 is installed inside the liquid refrigerant inlet pipe 2, and the filter screen 4 is located at the front end of the pressure regulating plate 5.

[0038] In practical applications, the filter screen 4 can filter the liquid refrigerant, filtering out the impurities contained in the liquid refrigerant and preventing these impurities from affecting the evaporation performance of the liquid refrigerant, thereby improving the evaporation efficiency of the liquid refrigerant. At the same time, it also prevents these impurities from entering the refrigerant evaporator and clogging the refrigerant evaporator or generating dirt that affects the evaporation efficiency.

[0039] The filter screen 4 can also increase the flow rate of liquid refrigerant under the same pressure. Together with the conical hole 51 on the pressure regulating plate 5, it increases the injection rate of liquid refrigerant, so that the liquid refrigerant is preheated in the first time, thereby making the preheating of liquid refrigerant more uniform.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A preheater of a heat pump system comprising a preheating cylinder (1), a liquid refrigerant outlet pipe (3) and a preheating assembly (11), characterized in that, The preheater further comprises: A liquid refrigerant inlet pipe (2) is installed on the preheating cylinder (1), and the liquid refrigerant inlet pipe (2) is inclinedly arranged, so that when the refrigerant enters the preheating cylinder (1) through the liquid refrigerant inlet pipe (2), the refrigerant first contacts the inner wall of the preheating cylinder (1); A pressure regulating plate (5) is installed in the liquid refrigerant inlet pipe (2), and a plurality of tapered holes (51) are formed in the pressure regulating plate (5), and the small-diameter end of the tapered hole (51) faces the preheating cylinder (1).

2. The preheater of a heat pump system according to claim 1, characterized in that, An annular cavity (6) is formed in the inner wall of the preheating cylinder (1), and a preheating assembly (11) is installed in the annular cavity (6), the preheating assembly (11) comprises a water inlet pipe one (7) and a water inlet pipe two (8), the water inlet pipe one (7) and the water inlet pipe two (8) are both spiral, and the water inlet pipe one (7) and the water inlet pipe two (8) are cross-positioned.

3. The preheater of a heat pump system according to claim 2, characterized in that, The two ends of the water inlet pipe one (7) are respectively a water inlet one (71) and a drain one (72), and the two ends of the water inlet pipe two (8) are respectively a water inlet two (81) and a drain two (82), hot water enters the water inlet pipe one (7) through the water inlet one (71) and flows downward spirally and is discharged from the drain one (72), and hot water enters the water inlet pipe two (8) through the water inlet two (81) and flows upward spirally and is discharged from the drain two (82).

4. The preheater of a heat pump system according to claim 1, wherein A driving member (10) is installed at the top end of the preheating cylinder (1), an output end of the driving member (10) is provided with a stirring rod (9), and the stirring rod (9) extends into the preheating cylinder (1).

5. The preheater of a heat pump system according to claim 4, characterized in that A temperature measuring assembly (91) is installed on the stirring rod (9), an electric control valve (31) is installed on the liquid refrigerant outlet pipe (3), and the temperature measuring assembly (91) and the electric control valve (31) are connected with an external control unit, when the refrigerant in the preheating cylinder (1) reaches a certain temperature, the electric control valve (31) is opened to discharge the liquid refrigerant.

6. The preheater of a heat pump system according to claim 1, wherein A filter screen (4) is installed in the liquid refrigerant inlet pipe (2), and the filter screen (4) is located at the front end of the pressure regulating plate (5).

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