DE2633100A1 - Heat pump for hot water supply - pref. uses domestic waste water as heat source - Google Patents

Abstract

The heat pump has its condenser made as a heat exchanger to which the cold water entering a hot-water supply system is brought. The evaporator is pref. made as a heat exchanger through which the domestic waste water flows, either vertically or horizontally. The waste-water pipe has a filter and a by-pass for solid particles. The separate components, compressor (10), evaporator (11), expansion valve (12) and condenser (13) are joined together by a pipe through which a cold medium circulates. The pipe coil (11') of the evaporator (11) is installed in a container (14) supplied by a conduit (15) with warm waste water at about 40 deg.C. The cooled water leaves through outlet conduit (16).

Description

R. 3 3 1 ¹ S λ

2.6.1976 Wd / Ht

Attachment to

Patent and

Utility master auxiliary registration

ROBERT BOSCH GMBH ₅ 7 Stuttgart t

Heat pump system

summary

A heat pump system is proposed, its heat exchanger is filled with warm wastewater at the evaporator and the heat extracted there by the heat pump is transferred to the heat exchanger at the condenser. The heat exchanger on the condenser is located on the domestic water inlet.

709885/00 4 p

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State of the art

In a known system of this type are for the separate use of waste water heat from different heat consumers separate sewer lines are necessary for these waters. In this way, the system is not particularly well designed from an economic point of view (DT-OS 2 304 537).

Advantages of the invention

The system according to the invention with the characterizing features of the main claim has the advantage that by installing the condenser in the domestic water inlet of the hot water heating system, a more economical mode of operation is possible because the temperature difference between the condensing and evaporation temperatures of less than 30 ⁰ C, which is particularly economical for heat pump operation, can be maintained.

Through the measures listed in the subclaims, in particular By installing the evaporator in the existing sewer pipe, the economy is even better given. This also makes the installation cost-effective.

drawing

An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows a schematic view of a heat pump system, Figures 2 to 5 different arrangements and designs of a waste water heat exchanger on the evaporator side, Figure 6 shows a heat exchanger on the condenser side.

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70988B / 00A5

Description of the invention

The heat pump consists in a known manner of a compressor 10, an evaporator 11, an expansion valve 12 and a Condenser 13. These parts are connected to one another in a closed circuit by a pipe in which a Refrigerant circulates.

The coil II ^{1 of} the evaporator 11 is arranged in a container 14 into which a line 15 opens, which carries warm waste water of about HO ° C from a building or any consumer. A line 16 leaves the container 14, in which the water cooled by the evaporator escapes. This water is cooled to about 5 ° C and discharged into the open . The pipe coil 13 'of the condenser 13 is also arranged in a container 17. A line 18 penetrates into the container 17 from below, and a line 19 is connected to the upper part of the container. The line 18 forms a service water inlet, in which z. B. tap water of approximately 15 ° C in the container 17 enters. It withdraws from forgiveness . liquid there heat and leaves the container with a maximum of 7P ° Q

Figures 2 to 5 show various arrangements and configurations of the container 14 at · evaporator 11, as the? Igur t indicates the designated with 114 container senkreoht angeori · net may be * he g via line 15 with warm Waseer Then begins the to escape into the likewise vertically arranged serpentine 11 'circulating refrigerant Waaaer the aolangi "until it has a temperature of about + 5 ⁰ C. The amount of heat of the circulating refrigerant , which has been raised to a higher temperature via the compressor 10, is transferred to the BrauohwaSMr flowing in the line 18 until it has the desired temperature (s *. B? + The compressor is switched off , if the TemperatW dtll

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sers has reached 5 ° C or when the maximum hot water ^{temperature of + 7O 0} C is reached. This keeps power consumption low. The refrigerant is relaxed again in the expansion valve so that it can absorb heat again at a lower temperature.

In the container 11 * 1 the supplied through the line 15 and sinks chilled water down. When new warm water is received, the cooled water is displaced into line 16.

As FIG. 3 shows, the container 214 can also be arranged horizontally be, the pipe-serpent likewise.

If the wastewater contains solids, it is advisable to provide a solids diverting device. The one marked with 31 ^ The container is supplied with warm water again via the line 15, a line 20 branches off in front of the container, which leads into the drainage channel 16 opens. A sieve 21 is arranged at the point at which the line 20 joins the line 15 ', so that no solids can get into the container 314. These fall over the line 20 into derivative l6.

FIG. 5 shows the container HI on the evaporator in a horizontal arrangement, likewise with a solids bypass 22 with a corresponding sieve 23. The feed takes place again via the line 15.

Figure 6 shows a construction of the container I7 - it is labeled 117. From this arrangement it can be seen that the cold water flows in from the line 18 at the bottom of the container, and that the warm water at the top of the container via the line 19 flows to the consumer.

709885/0045

Claims (4)

Expectations (l.) Heat pump system consisting of an evaporator, which consists of the Environment absorbs heat, a condenser that transfers the heat generated by the heat pump to a heating cable, a Expansion valve and a compressor, which is closed in the Circuit transports a refrigerant from the evaporator to the condenser, characterized in that the condenser (13) is arranged as a heat exchanger in the domestic water inlet (18). 2. Heat pump according to claim 1, characterized in that the evaporator (11) as a heat exchanger in the sewer line (15) a building (15) or the like is arranged. 3. A heat pump according to claim 2, characterized in that the waste water flows through the dev heat exchanger for the waste water in the vertical direction. 4. Plant according to claim 2, characterized in that the heat exchanger for the wastewater is traversed by the wastewater in a horizontal direction. 5 · Plant according to claim 2 to 4, characterized in that in Heat exchanger for the waste water, a sieve (21) and a bypass line (20) is intended for the discharge of pesticides present in the water. / 70988 5/00 4 S orig, _{wal inspected}