CN201652812U - Water tank of heat pump water heater - Google Patents

Abstract

The utility model discloses a heat pump water heater water tank to overcome the difficult defect of dismantling of coil pipe of current heat pump water heater water tank. Heat pump water heater water tank, including water tank, coil pipe, the water tank includes inner bag and outer courage, and the coil pipe is linked together with the heat pump through working medium import, working medium export respectively, the business turn over end of coil pipe links to each other with the inner bag of water tank through the flange. The utility model discloses a heat pump water heater water tank, the coil pipe passes through flange fixed connection with the inner bag of water tank, breaks down at the coil pipe after, easily pulls down from the water tank, has made things convenient for the maintenance, has avoided the coil pipe to damage and has made the rivers advance its internal system, has reduced heat pump water heater water tank's fault rate.

Description

Heat pump water heater tank

technical field

The utility model relates to a heat exchange device, in particular to a heat pump water heater water tank. the

Background technique

Heat pump water heater, because of its environmental protection and energy saving, is loved by more and more ordinary people, and the scope of use is also more and more extensive. The current heat pump water heater heating water mainly has the following methods:

As shown in Figure 1, the circulating heat pump water heater circulates and heats the water in the water tank and the heat exchanger of the heat pump unit through the water pump to achieve the purpose of heating water. The advantage is that the structure of the water tank is simple, the machine is easy to repair when it fails, and the service life of the machine can be extended by means of maintenance; the disadvantage is that the service life of the water pump cannot be synchronized with the service life of the machine, and the failure rate of the water pump is high, and the use of the water pump will increase Ineffective power consumption, the water tank of this kind of heat pump water heater is connected to the heat pump 15 through the water inlet pipe 1 and the water outlet pipe 2, the circulating water pump 3 is arranged on the water outlet pipe 2, and the sewage outlet 4 is also arranged at the bottom of the water tank of the water heater.

As shown in Figure 2, the heat exchange copper tube of the outer disc heat pump water heater is coiled outside the inner tank of the water tank. The thermal conductivity of the copper tube is better, but the thermal conductivity of stainless steel is poor. The heat of the refrigerant in the copper tube passes through the wall of the copper tube. 1. The stainless steel inner tank is transferred to the water. It is affected by the temperature difference and thermal conductivity. Only 30%-70% of the heat is absorbed by the water, and the rest of the heat is lost. The heat exchange effect of this kind of heat pump water heater is the worst. The processing technology of the water tank of the heat pump water heater is complicated, and the processing is difficult. The liner of the water tank needs to be pressed into a U-shaped groove, which increases the processing cost, and may damage the solder joints and cause the liner to perforate. When the machine is working, the outer coil of the water tank and the water stored in the tank are made of different materials, and their thermal expansion coefficients are also different. If thermal expansion and contraction occur, friction will occur between the copper pipe and the water tank wall, causing the copper pipe to be damaged and perforated. Because the copper tube is easy to deform, there will be a gap between the copper tube and the water tank wall, and the copper tube and the water tank liner are separated. The heat in the copper tube is difficult to transfer to the water.

As shown in Figure 3, because the heat exchange copper tube (condensing copper tube) of the inner coil heat pump water heater is directly immersed in the water tank, the heat in the copper tube can be quickly and completely absorbed by the water through the copper tube wall. The heat exchange performance of the water heater is the best among the three existing heat exchange methods, and it is the mainstream practice of water tanks at present.

As shown in Figures 4 and 5, in the existing heat pump water heater, since the condenser is immersed in water, the heat exchange is thorough, which can minimize the length of the condenser tube, reduce the cost, reduce the pressure of the system, and prolong the life of the compressor. In FIG. 5 , the hanger position 5 and the welding position 6 are marked, and the working fluid inlet 7 and the working fluid outlet 8 are all connected to the water tank by direct welding.

But there is following defect in existing heat pump water heater water tank:

The copper coil pipe passing through the water tank is completed by direct welding or threaded connection. It is sealed inside the water tank and is not easy to repair. After the copper pipe is perforated, the water will flow back into the condenser coil system, causing the machine to be scrapped.

Utility model content

The purpose of the utility model is to disclose a heat pump water heater water tank to overcome the defect that the coil pipe of the existing heat pump water heater water tank is not easy to disassemble.

The heat pump water heater water tank described in the utility model includes a water tank and a coil. The water tank includes an inner tank and an outer tank. The coil is respectively connected to the heat pump through the working fluid inlet and the working fluid outlet. connected to the liner.

Wherein, the inner surface and/or the outer surface of the coiled pipe are arranged in a thread shape.

Among them, the coil tube is made of copper tube, stainless steel tube, titanium tube and seamless tube.

In the water tank of the heat pump water heater of the utility model, the coil is fixedly connected with the inner tank of the water tank through a flange. After the coil fails, it is easy to be removed from the water tank, which facilitates maintenance and avoids the damage of the coil to cause water to flow into its internal system. , reducing the failure rate of the water tank of the heat pump water heater.

Description of drawings

Fig. 1 is the structural representation of existing circulation heat pump water heater water tank;

Fig. 2 is a structural schematic diagram of an existing outer disc heat pump water heater water tank;

Fig. 3 is a structural schematic diagram of an existing inner coil heat pump water heater water tank;

Fig. 4 is a schematic diagram of the internal structure of an existing heat pump water heater water tank;

Fig. 5 is the structural schematic diagram of the connection mode of existing copper pipe and water tank;

Fig. 6 is a schematic structural view of the water tank of the side opening heat pump water heater of the present invention;

Fig. 7 is a schematic structural view of the water tank of the top opening heat pump water heater of the present invention;

Fig. 8 is a schematic structural view of the bottom opening heat pump water heater water tank of the present invention;

Fig. 9 is a schematic diagram of the connection structure between the water tank liner and the flange of the heat pump water heater of the present invention;

Figure 10 is a top view of Figure 9;

Fig. 11 is a schematic diagram of the connection structure of the heat pump water heater water tank outer tank corresponding to Fig. 9;

Figure 12 is a top view of Figure 11;

Fig. 13 is a schematic structural view of the water tank coil of the heat pump water heater of the present invention.

In conjunction with the accompanying drawings, the following reference numerals are marked thereon:

1-water inlet pipe, 2-water outlet pipe, 3-circulating water pump, 4-sewage outlet, 5-hanger position, 6-welding position, 7-working fluid inlet, 8-working fluid outlet, 9-hot water outlet, 10 -Temperature measuring port, 11-cold water inlet, 12-inner tank, 13-outer tank, 14-flange, 15-heat pump, 16-coil.

Detailed ways

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

As shown in Fig. 6-Fig. 8, the heat pump water heater water tank of the utility model includes three types: side opening type, top opening type and bottom opening type, the main difference is that the working medium inlet 7, the working medium outlet 8 and the water heater tank connection location.

In addition, in the water tank of the heat pump water heater in Figure 6-8, since the failure rate of the hot water outlet 9, the temperature measuring port 10, and the cold water inlet 11 is not high, the connection between the hot water outlet 9, the temperature measuring port 10, the cold water inlet 11 and the water tank The connection is still the existing welding method.

As shown in Figure 9-12, the four round holes evenly distributed on the inner ring of the flange 14 are the channels for the inlet and outlet ends of the coil (working fluid inlet 7, working fluid outlet 8) to enter and exit the flange 14, and the ten round holes distributed on the outer ring The circular hole is a bolt fixing hole used for fixing the flange 14 and the inner container 12. The flange 14 is fixed on the inner bladder 12 of the water tank, and is not connected with the outer bladder 13 .

As shown in Figure 13, the inner and outer surfaces of the coil 14 are threaded, which increases the contact area between the coil 14 and the water in the water tank, which is conducive to accelerating the heat loss of the working medium in the coil and improving the working efficiency of the heat pump water heater.

In the water tank of the heat pump water heater of the utility model, the coil is fixedly connected with the inner tank of the water tank through a flange. After the coil fails, it is easy to be removed from the water tank, which facilitates maintenance and avoids the damage of the coil to cause water to flow into its internal system. , reducing the failure rate of the water tank of the heat pump water heater.

What is disclosed above is only a specific embodiment of the utility model, but the utility model is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the utility model.

Claims (3)

1. heat-pump water-heater water tank, comprise water tank, coil pipe, described water tank comprises inner bag and outer courage, it is characterized in that, described coil pipe is connected with heat pump by working medium import, sender property outlet respectively, and the in-out end of described coil pipe links to each other with the inner bag of described water tank by flange.

2. heat-pump water-heater water tank according to claim 1 is characterized in that the inner surface of described coil pipe and/or outer surface are the screw-like setting.

3. heat-pump water-heater water tank according to claim 1 and 2 is characterized in that, described coil pipe is made by copper pipe, stainless steel tube, titanium pipe, seamless pipe.

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