CN201021877Y - Condensation heat exchanger of heat pump type water heating equipment - Google Patents

Abstract

The utility model relates to a heat pump type hot water equipment's condensation heat exchanger. The refrigerant distributor comprises a shell (1) and a plurality of equidistant and parallel arranged coil pipes (2), wherein two ends of each coil pipe (2) are communicated with two pressure distribution pipes (7), and a refrigerant inlet and a refrigerant outlet are arranged on the two pressure distribution pipes (7) with the inner diameter far larger than that of each coil pipe. The coil pipe (2) is in a multi-bend shape, and the straight sections are parallel at equal intervals. The cold water inlet is arranged at the lower part of the shell (7), the hot water outlet is arranged at the upper part of the shell (7), the refrigerant inlet is arranged at the upper part of the shell (7), and the refrigerant outlet is arranged at the lower part of the shell (7). A layer of laminated plate (8) is arranged in the shell (7) corresponding to each three layers of the coil pipe (2) in a bending way. The utility model discloses a mode of extension heat exchange flow carries out disposable heating to water, and the flow direction through making rivers direction and refrigerant is on the whole opposite, has realized making the temperature can rise to higher temperature to can improve compressor operating condition.

Description

Heat pump hot water equipment condensing heat exchanger

technical field

The utility model relates to a heat exchanger, in particular to a condensing heat exchanger for heat pump hot water equipment, which is mainly used for heat pump hot water equipment on the market, so that such equipment can obtain higher outlet water temperature and energy efficiency. Compare.

Background technique

Among the various hot water production equipment currently in use, heat pump hot water equipment has achieved rapid development in the market due to its advantages of low operating cost, energy saving, environmental protection, and safety. However, most of the heat pump water heaters currently on the market use the circulation heating method to produce hot water, that is, the water in the heat preservation water tank is pumped into the heat pump water heater unit, and after absorbing the heat discharged by the condensation of the refrigerant in the unit, the heat is raised. Then flow back to the heat preservation water tank, so that the circulation continues to increase the temperature of the hot water in the heat preservation water tank. When the water temperature in the heat preservation water tank rises to 50°C, the outlet water temperature of the heat pump unit is above 55°C. At this time, the condensation temperature of the refrigerant exceeds 53°C, which has reached the working limit of ordinary refrigeration compressors. It is actually difficult to obtain hot water higher than 50°C for ordinary heat pump hot water equipment. In addition, the temperature difference between the inlet and outlet water of the unit is small, and the heat exchange effect is poor, which reduces the heating efficiency of the unit, not only increases energy consumption, but also makes the refrigeration compressor run at a high temperature, which is very easy to damage the compressor. These shortcomings greatly limit the use effect of heat pump water heating equipment.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a heat pump water heater unit that can obtain a higher outlet water temperature, which can improve the operating conditions of the refrigeration compressor in the heat pump water heater equipment, with high efficiency and energy saving. Heat exchanger for heat pump hot water equipment.

In order to achieve the above purpose, the technical solution adopted by the utility model is, a heat pump type hot water equipment condensing heat exchanger, including a shell and a coil, the shell is provided with a cold water inlet and a hot water outlet, and the shell is covered by The layered plates are separated into curved water flow channels, and the direction of water flow in the water flow channels is generally opposite to that of the refrigerant in the coil.

Since the utility model abandons the circulating water heat exchange mode, the water is heated once by prolonging the heat exchange process, and the direction of the water flow is opposite to that of the refrigerant as a whole by controlling, so that the water temperature can be raised. The temperature is as high as that of the high-temperature refrigerant, and the cooling effect of the refrigerant is more obvious to improve the working conditions of the refrigeration compressor.

In the heat pump type hot water equipment condensing heat exchanger described above, there are multiple coils, which are equidistantly arranged in parallel, and their two ends communicate with two pressure distribution pipes, and the refrigerant inlet and refrigerant outlet are located in two On pressure distribution pipes with an inner diameter much larger than the inner diameter of the coil. Evenly setting multiple coils can make the heat exchange more uniform; the pressure distribution pipe can make the inlet and outlet pressures of each coil close to ensure that each coil can obtain a uniform flow.

In the above-mentioned condensing heat exchanger of heat pump hot water equipment, the refrigerant inlet and refrigerant outlet are arranged in the middle of the two pressure distribution pipes. This better guarantees an even flow to each coil.

In the above-mentioned condensing heat exchanger for heat pump hot water equipment, the cold water inlet is arranged at the lower part of the casing, the hot water outlet is arranged at the upper part of the casing, the refrigerant inlet is arranged at the upper part of the casing, and the refrigerant outlet is arranged at the lower part of the casing . In this way, under the condition of ensuring the heat exchange effect, the water flow can be further made more stable.

In the above-mentioned condensing heat exchanger for heat pump hot water equipment, the coil is in a multi-bend shape, and the straight sections are equidistant and parallel to each other, and a layer of layered plates can be arranged every three layers of bending in the shell. When the heat exchange effect is satisfied, the use of layered plates can be reduced.

In the above-mentioned condensing heat exchanger for heat pump hot water equipment, the coil is in a multi-bend shape, and the straight sections are equidistant and parallel to each other, and a layer of layered plates can also be arranged every two layers of bending in the shell. Compared with setting one layer of layered plates every three layers of bending, the heat exchange effect is better.

In the above-mentioned condensing heat exchanger for heat pump hot water equipment, the coil is in the shape of multiple bends, and the straight sections are equidistant and parallel to each other, and a layer of layered plates can be arranged in each layer of bending in the shell. This way the heat exchange effect will be the best.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Accompanying drawing 1 of this specification is a three-dimensional cross-sectional schematic view of an embodiment of the utility model;

Fig. 2, Fig. 3 and Fig. 4 are cross-sectional views of the embodiment shown in Fig. 1 in three directions of front view, side view and plan view respectively.

In the figure, 1 is the housing, 2 is the coil, 3 is the refrigerant inlet, 4 is the refrigerant outlet, 5 is the cold water inlet, 6 is the hot water outlet, 7 is the pressure distribution pipe, and 8 is the layered plate.

Detailed ways

In the embodiment shown in accompanying drawings 1, 2, 3 and 4, the condensing heat exchanger of the heat pump type hot water equipment of the present invention consists of a shell 1, a coil pipe 2, a refrigerant inlet 3, a refrigerant outlet 4, and a cold water inlet 5 , hot water outlet 6, pressure distribution pipe 7 and layered plate 8 constitute. The refrigerant inlet 3 is connected to the refrigerant outlet of the compressor in the refrigerant circulation circuit in the heat pump water heater unit, the refrigerant outlet 4 is connected to the dry filter in the above refrigerant circulation circuit, and the cold water inlet 5 is connected to the cold water supply The pipes are connected, and the hot water outlet 6 is connected with water or water storage facilities. There are multiple coils 2, and they are equidistantly parallel to obtain a more uniform heat exchange effect. The straight pipe sections of the coils are arranged on the same plane and are parallel to each other, and the two ends of each coil are respectively connected with the inner cavities of two pressure distribution pipes 7 . The inner diameter of the pressure distribution pipe 7 is much larger than the inner diameter of the coils 2, so that the inlet and outlet pressures of each coil 2 are similar to ensure that each coil 2 obtains a uniform flow. A layer of layered plates 8 is installed between each straight section of the coil (or every two layers or every three layers according to the designed heat exchange effect). The straight pipe sections are parallel and welded together with the straight pipe sections of each coil to increase the actual heat exchange area. The side parallel to the straight section of the coil is closely connected with the shell 1, and one of the other two sides is tightly connected with the shell. The other side only connects to the elbow of the coil, leaving a channel for water to flow through. The channel openings left by two adjacent layered plates face each other, thus forming a curved water channel, so that after water enters the shell, it can flow upward step by step along the coil tube, greatly improving the heat exchange effect.

In the utility model, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the pressure distribution pipe 7 from the refrigerant inlet 3, and then flows into each coil 2 evenly, and the heated water flows through the coil 2 to absorb the refrigerant and discharge it. of heat. After exhausting heat, the refrigerant condenses and turns into a liquid state in a certain section of the coil, and continues to be cooled by water, and then flows out from the refrigerant outlet 4 and enters the dry filter in the refrigerant circulation circuit of the unit.

The cold water enters from the cold water inlet 5. Due to the limitation of the shell 1 and the layered plate 8, it will flow along the outer wall of the coil 2, and it is opposite to the flow direction of the refrigerant as a whole (referring to the total flow direction rather than the flow direction of each section), After absorbing the refrigerant and expelling heat, the water temperature gradually increases, and finally high-temperature hot water flows out from the outlet 6, and is sent to water or water storage equipment for use by users. The product of the utility model can not only provide high-temperature water, but also provide low-temperature water by controlling the speed of water inflow. Due to the large heat exchange temperature difference of the water, the temperature of the water outlet from the heat exchanger is high, and the heat exchange effect is good. After the refrigerant condenses into a liquid, it will continue to be cooled by the cold water, which is more conducive to the evaporation and heat absorption needs of the latter part of the refrigerant cycle circuit, so it is greatly improved. The heating efficiency of the unit is improved, and the operating condition of the compressor is improved. Since the water temperature is gradually increased, the condensation temperature of the refrigerant in the coil is much lower than that of the hot water outlet, and the temperature of the hot water produced is also much higher than that of ordinary heat pump water heaters. Thus, the heat pump hot water unit realizes the purpose of high water temperature and high efficiency.

Claims (7)

1. heat pump type hot water equipment condensing heat exchanger, comprise housing (1) and coil pipe (2), housing (1) is provided with cold water inlet and hot water outlet, it is characterized in that: described housing (1) is divided into crooked water stream channel by demixing plate (8), and water (flow) direction is opposite on the whole with the flow direction of coil pipe inner refrigerant in this water stream channel.

2. heat pump type hot water equipment condensing heat exchanger as claimed in claim 1, it is characterized in that: described coil pipe (2) has many, their equidistant parallels are arranged, and its two ends communicate with two pressure distribution pipes (7), and refrigerant inlet and refrigerant outlet are located at two internal diameters on the pressure distribution pipe (7) of coil pipe internal diameter.

3. heat pump type hot water equipment condensing heat exchanger as claimed in claim 2 is characterized in that: described refrigerant inlet and refrigerant outlet are located at two pressure distribution pipes (7) middle part.

4. as claim 2 or 3 described heat pump type hot water equipment condensing heat exchangers, it is characterized in that: described cold water inlet is located at housing (1) bottom, hot water outlet is located at housing (1) top, and refrigerant inlet is located at housing (1) top, and refrigerant outlet is located at housing (1) bottom.

5. heat pump type hot water equipment condensing heat exchanger as claimed in claim 1 or 2 is characterized in that: described coil pipe (2) is many bendings shape, and the mutual equidistant parallel of straight section part, and per three layers of bending are provided with one deck demixing plate (8) in the housing (1).

6. heat pump type hot water equipment condensing heat exchanger as claimed in claim 1 or 2, it is characterized in that: described coil pipe is many bendings shape, and the mutual equidistant parallel of straight section part, and per two layers of bending are provided with one deck demixing plate (8) in the housing (1).

7. heat pump type hot water equipment condensing heat exchanger as claimed in claim 1 or 2, it is characterized in that: described coil pipe is many bendings shape, and the mutual equidistant parallel of straight section part, and each layer bending is provided with one deck demixing plate (8) in the housing (1).

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