CN100451478C - A public bath waste heat recovery heat pump bathing machine - Google Patents

Abstract

The invention relates to a heat pump bathing machine for waste heat recovery in public baths, belonging to the technical field of energy. The heat pump bathing machine includes a hot water storage tank, a heating heat source, a heat pump, a heat exchanger, a water supply pump, a sewage pump, etc.; the hot water storage tank includes a heating heat source; It is directly discharged into the sewer, and the other is controlled by the valve F3, which first passes through the filter, then passes through the sewage pump and heat exchanger, enters the heat pump evaporator for heat exchange, and then enters the sewer; the tap water pipeline is divided into two roads, one road It is often used for the bathroom, and the other route is controlled by valve F1, then pressurized by the feed water pump, enters the heat exchanger, then enters the heat pump condenser for heat exchange, and then enters the heat storage tank. Before the device enters the heat pump, tap water and bath waste water conduct a heat exchange, which improves the performance of the heat pump; the temperature of the water in the heat storage tank decreases, and can enter the heat pump again for heating to maintain the water temperature, thereby improving the efficiency and performance of the bath machine. Significantly increased.

Description

A public bath waste heat recovery heat pump bathing machine

technical field

The invention relates to a heat pump bathing machine for waste heat recovery in a public bath, belonging to the technical field of energy.

Background technique

At present, most of the heat sources used in domestic public baths are coal-fired boilers, and some use oil-fired boilers or electric boilers. Boilers in public baths need to run for a long time, but the environmental pollution of coal-fired boilers is relatively serious. Oil-fired boilers are greatly affected by fuel supply and price fluctuations. kind of waste. In addition, the heat consumption of public baths is relatively large, and the bathing wastewater is directly drained, a large amount of heat in the wastewater is lost, and energy is wasted seriously. In order to solve these problems, a heat pump can be used to recover waste heat to produce hot water for bathing. In the patent "Energy Storage Type Heat Pump Hot Water Boiler Water Supply Device" (People's Republic of China, Patent No. 01244858.3, Authorized Announcement No. CN 2502177Y, Announcement Date July 24, 2002), a method of using a heat pump to recycle bathing wastewater is described. A device for making hot water from waste heat. In this device, the tap water with lower temperature and the bath waste water with higher temperature directly enter the heat pump, so that the capacity of the heat pump is relatively large; the device provides boiling water at the same time, but the temperature of the heat pump’s water outlet cannot meet this requirement, so the electric boiler needs Keep running to boil the water; when the water consumption is less, the temperature of the water in the hot water storage tank will gradually decrease, which will affect the quality of use.

Contents of the invention

The invention uses the heat pump to recycle waste heat from waste water to produce bath water, adopts an advance heat exchange device to reduce the capacity of the heat pump, and adopts an internal circulation method to solve the heat dissipation problem of the water storage tank.

The present invention proposes a heat pump bathing machine for waste heat recovery in public baths, which is characterized in that: the heat pump bathing machine includes a heat storage tank, a heating heat source, a heat pump, a sewage pool, a heat exchanger, a water supply pump, a sewage pump, a filter and Valve; the hot water storage tank contains a heating source, the water inlet pipe of the hot water storage tank is connected to the outlet pipe of the heat pump, the hot water generated by the heat pump enters the hot water storage tank, and the outlet water of the hot water storage tank is divided into two One way of hot water is often supplied to the bathroom, and the other way of hot water is controlled by the second valve F2 and directly merged into the tap water pipe at the inlet of the feed water pump; the sewage pool includes two outputs, one of which is controlled by the fourth valve F4 and directly discharged into The sewer, the other route is controlled by the third valve F3. After passing through the filter, it is pressurized by the sewage pump and enters the heat exchanger, and then enters the heat pump evaporator for heat exchange and then enters the sewer; the tap water pipeline at the inlet of the feed water pump is divided into Two routes, one is often used for the bathroom, and the other is controlled by the first valve F1, then pressurized by the feed water pump, enters the heat exchanger, then enters the heat pump condenser for heat exchange, and then enters the hot water storage tank.

In the above-mentioned heat pump bathing machine, the heating heat sources are various forms of boilers, solar heaters or other forms of heat sources, or can be selected independently according to actual conditions.

The invention firstly exchanges heat between high-temperature bathing wastewater and low-temperature tap water to increase the temperature of the tap water, and then enters the heat pump, which can reduce the capacity of the heat pump; uses waste water waste heat as the low-temperature heat source of the heat pump, and discharges it after the temperature is lowered, while increasing the temperature of the tap water When the temperature reaches a higher temperature, it is sent to the hot water storage tank; high-temperature water and tap water are sent to the bathroom for use; the water in the hot water storage tank can directly enter the heat pump for reheating to maintain the temperature in the water tank.

The features of this invention include: before entering the heat pump, the tap water and the bathing waste water conduct a heat exchange, which improves the performance of the heat pump; if the temperature of the water in the heat storage tank drops, it can enter the heat pump again for heating to maintain the water temperature. These measures have improved the efficiency and performance of the bathing machine.

Description of drawings

Fig. 1 is the principle diagram of the heat pump bathing machine of the present invention.

Fig. 2 is the water level line of the control strategy of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the technical scheme of the present invention is described further:

As shown in Figure 1, the invention consists of a hot water storage tank, a heating source, a heat pump, a sewage tank, a heat exchanger, a water feed pump, a sewage pump, a filter and valves.

The sewage tank includes two outputs, one is controlled by the fourth valve F4, and directly discharged into the sewer; the other is controlled by the third valve F3, first passes through the filter, then is pressurized by the sewage pump and enters the heat exchanger, and then enters the heat pump for evaporation into the sewer after heat exchange.

The tap water pipeline is divided into two lines, one is often used for the bathroom, and the other is controlled by the first valve F1, then pressurized by the feed water pump, enters the heat exchanger, then enters the heat pump condenser for heat exchange, and then enters the water storage tank.

The water inlet pipe of the heat storage tank is connected with the water outlet pipe of the heat pump, and the hot water generated by the heat pump enters the heat storage tank. The outlet water is divided into two paths, one path of hot water is often supplied to the bathroom, and the other path of hot water is controlled by the second valve F2 and directly merged into the tap water pipe at the inlet of the feed water pump.

The heat storage tank contains a heating source, which can be various forms of boilers, solar heaters or other forms of heat sources, which can be selected independently according to the actual situation, and are mainly used for heating when starting.

The control strategy can use the water level control in the heat storage tank and the sewage tank, and the water level control line is shown in Figure 2. Among them, the control of the heat storage tank includes two control lines V1 and V2, and the sewage tank includes four control lines V3, V4, V5 and V6.

At the start of operation, there is no water in the sump. At this time, the first valve F1 is opened, the second valve F2, the third valve F3 and the fourth valve F4 are closed, and the heat pump is closed. After the heating heat source is heated, it is sent to the bathroom for use.

After using for a period of time, the water level in the sewage pool is higher than V5. At this time, the heat pump is started, and the third valve F3 is opened at the same time, and the sewage pump is turned on. The sewage passes through the filter, is pressurized by the sewage pump, enters the heat exchanger for heat exchange, and then enters the heat pump. . As the bath water temperature rises, the heating heat source is gradually stopped, and all the heat is supplied by the heat pump. If the water level of the sewage pool is between V3 and V6, it will always operate in this way.

If the output of sewage is more than the water consumption of the heat pump evaporator during use, the water level in the sewage pool will rise. When the water level is higher than V3, the fourth valve F4 will be opened. At this time, part of the sewage will flow to the heat pump, and the other part will be directly discharged. into the sewer, in which case the water level will drop. When the water level is lower than V4, the fourth valve F4 is closed, and the sewage is still only supplied to the heat pump through the third valve F3.

If the amount of sewage produced in use is less than the water consumption of the heat pump evaporator, the water level in the sewage pool will drop. When the water level is lower than V6, the heat pump will stop, the third valve F3 will be closed, and the heating heat source will be started to treat bath water. At this time, the sewage tank will not send water outwards, and the water level will gradually rise. When the water level is higher than V5, the heat pump, the third valve F3 and the sewage pump are turned on, and the heating source is turned off.

During use, the water supply of tap water should meet the water consumption requirements for bathing. Therefore, when the water consumption for bathing is relatively small, the water level in the heat storage tank will gradually rise. When the water level is higher than V1, the first valve F1 is closed, and the second valve is closed. When F2 is turned on, the bath water is internally circulated and kept warm by a water pump or a heating source; after that, the water level in the heat storage tank will drop. When the water level is lower than V2, the first valve F1 is opened, and the second valve F2 is closed to continue to use Tap water feeds the water.

In order to prevent frequent switching of working states, a certain amount of buffer areas need to be set between V1 and V2, between V3 and V4, and between V5 and V6. The size of the area should be based on fluctuations in bath water usage.

Claims (2)

1, a kind of wash apparatus of heat pump of recovering residual heat from bathhouse is characterized in that: the described heat pump machine of having a bath contains hot water storage tank, heating thermal source, heat pump, cesspool, heat exchanger, feed pump, sewage pump, filter and valve; Described hot water storage tank comprises the heating thermal source, the water inlet pipe of described hot water storage tank is connecting the outlet pipe of heat pump, the hot water that heat pump produces enters hot water storage tank, the water outlet of described hot water storage tank is divided into two-way, one road hot water often supplies the bathroom, other one road hot water is directly incorporated the running water pipe of entrance of water-supplying pump into by second valve (F2) control; Described cesspool comprises two-way output, and a route the 4th valve (F4) control directly enters sewer, an other route the 3rd valve (F3) control, earlier, enter heat exchanger by the sewage pump pressurization again, enter sewer after entering the evaporator with heat pump heat exchange then through behind the filter; The tap water pipe line of described entrance of water-supplying pump is divided into two-way, and one the road often supplies the bathroom, and an other route first valve (F1) control by entering heat exchanger after the feed pump pressurization, enters the heat pump condenser heat exchange more then, enters hot water storage tank again.

2, wash apparatus of heat pump of recovering residual heat from bathhouse according to claim 1 is characterized in that: described heating thermal source is boiler, solar heater or other forms of thermal source.

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