DE3002451A1 - Heat pump utilising heat from own circuit - has second heat exchanger to transfer heat to evaporator - Google Patents

Abstract

Heat pumps usually draw heat from the surrounding atmosphere, or other relatively cold source. This sytem can lead to ice forming on the surface of the evaporator or even to the freezing of any water used in the heat pump circuit. This problem is overcome by using heat from the heat pump itself to heat the refrigerant used in the system. The compressor (3), draws in the refrigerant in its vapour phase from the evaporator (1) and delivers it to the heat exchanger (5) where heat is extracted to supply the central heating system (6). Some of the heat remaining in the refrigerant is then extracted by a second heat exchanger (10) through a heat transfer fluid which is pumped by the pump (22) through a third heat exchanger (14) which surrounds the evaporator.

Description

Mrs. Ingebarg BAUER, née Körzdörfer, Klosterhof 9, 8501 Seligenporten

"Procedure for operating a heat pump and heat pump for carrying out the procedure"

(Addition to P 29 50 618.1)

The main patent relates to a method for operating a heat pump in which the cool refrigerant is supplied with heat heated, then compressed and fed to a useful heat exchanger, and then cooled and expanded under expansion is fed back to the area of the heat supply, the heat of the heat supply from the research after the Nutzwärmetau still warm refrigerant derived and / or generated by an energy source independent of the outside temperature will. Furthermore, the main patent relates to a heat pump for carrying out the method, which is characterized in this is that a first strand section leading the refrigerant between useful heat exchanger and one of the Expansion upstream throttle is provided with a working heat exchange, with an arrangement for transition the heat of the refrigerant is provided to a second strand section in which the cool refrigerant is located. This ensures perfect work even at low temperatures (especially in frost) Heat pump with a satisfactory efficiency

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enough. In addition, the otherwise at least partially lost Heat of the first strand section used for heating the second strand section. Regarding For further features and advantages of the main patent, reference is made to the content of the disclosure.

The object of the invention is to find further heat sources such a heat pump in the aforementioned sense

in order to

to make cash, d. i.e. / the heat pump even at low temperatures, in particular, to let frost work properly and also to prevent heat and thus energy loss .

The solution to this problem is provided by the features of the claims, both with regard to the method according to claim 1 and the design of a heat pump according to claims 2 to B. This will remove all possible heat sources of the heat pump and the associated Parts (compressor, motor of the compressor and the like), or the heat radiated from them, is used.

The invention is detailed below. Hand of some working examples described and shown in the accompanying drawing. In the drawing shows

Fig. 1: a first embodiment of the Invention,

Fig. 2: further possible embodiments of the Invention,

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Fig. 3: Another possible embodiment the invention,

The heat pump basically consists of a circuit of a refrigerant that is in a liquid and relatively cool state in an evaporator area 1 and is heated there in a manner to be explained in more detail so that it is present in the compression area 2 at a correspondingly higher temperature and in the gaseous state . It is then by a compressor (compressor 3), which is operated by a motor 3 \, compressed to the extent that it is in the first line section 4 downstream of the compressor in the gaseous state a high temperature, for. B. BO - 7O ⁰ C. It is then fed to the useful heat exchanger (condenser) 5, e.g. to warm the water of a heating system 6. In the area 7 downstream of the useful heat exchange, the refrigerant is still relatively warm and essentially gaseous Area 9 and cools down again to the starting temperature of Area 1.

According to the embodiment of FIG. 1, the first Line section designated section 4 between the compressor 3 and the useful heat exchanger 5 as a working heat exchanger used in such a way that the heat of the refrigerant, in particular, the heat that is otherwise uselessly radiated into the outside air is thought of, starting with section 4 a part 10 of a circuit 11 of a medium, e.g. B. water dispensed, d. H. the medium is heated there. It will

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then via line 12 for a further working heat exchange which is located in the second strand section 13 of the cool and liquid heating medium 1 and from a corresponding part 14 of the circulation system 11 consists. The medium is in the circulatory system 11 circulated by a pump 22.

In addition, a further working heat exchanger 23 according to the main patent can be provided in the third branch section 7 be, to which the medium of the circuit 11 is supplied via a line 15 'which is separated from the main line 15 will. The medium heated with the waste heat from the third strand section 7 flows into the line via the line 12 ' 12 and from there to working heat exchange 14/13.

In a manner not shown, the heat of the Compressor 3 and / or its drive motor 3 ', e.g. B. an internal combustion engine, for heating the refrigerant be used in the evaporator area 1. This can be either with the aid of a medium circuit 11 according to the above description of the exemplary embodiment It. 1, or by direct heat exchange with the cold refrigerant leads one, the strand according to the embodiment 2.

If the medium flowing at 12 and heated by the working heat exchanges 4/10 or 7/23 is too hot, so that with the Working heat exchange 14/13 the refrigerant would be heated too high, from which the cooled medium (e.g. water) leading line 1.5, or 15 'drawn with dash-dotted lines

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nets branches 16, or 16 'discharged, the respective Working heat exchange 4/10, or 7/23 bypass and over a temperature-adjustable temperature mixing valve 17 open into the wiring harness 12. For example, a temperature of 25 ° C. at the mixing valve 17 has proven to be proved beneficial.

In the embodiment of Fig. 2, the working heat exchange between the first strand section 4 and the line area 9, which carries the cool refrigerant, takes place by direct heat exchange according to number 20 of the compressor 3 (and possibly the associated motor 3 ¹ ) and transfers it to the refrigerant line.

According to the main patent, an electric heater 1Θ could be provided in the second strand section 13, which of an energy source 19 (battery, grid or solar energy system) is operated. For details, refer to the Main patent referenced.

The working heat exchanges of Examples 1 and 2 used to heat the cool refrigerant can also be used are combined with one another, in particular with the corresponding working heat exchanges of the main patent. This is not shown in detail in the drawing. This means that all waste heat is fed into the refrigerant line, those from the heated lines carrying the refrigerant, the compressor, the motor or the like.

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will give. The heat transfer can by means of the circuit 11 and / or directly by heat exchange to the corresponding sections of the refrigerant leading Lines take place »

The embodiment of Fig. 3 shows that the heated refrigerant leading strand 4 divides shortly before reaching the useful heat exchange 5, the strand part 4 ^{1 leads} to the useful heat exchange 5 and then on to the strand part 7, while the branch 4 "with a corresponding amount hot refrigerant leads into section 9 or into the beginning of section 13 and thus into cold refrigerant 1 and heats it accordingly It is understood that the various working heat exchanges of the previous embodiments can also be provided in the embodiment of FIG.

- Expectations -

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Claims (13)

BERNHARDRCCHTER. = - :. ": ..-- '..:" ", Qan 85 NORNBERQ, January 23, 1980 PATENT ADVERTISER Beethovens ^ 10 Telephone Sa.-Nr. (0911) 59 5015 K - g Telegram: Patri Telex: 0623268 patri d Mrs. Ingaborg- BAUER, née Körzdörfer Patent and protection claims 1. A method for operating a heat pump in which the cool refrigerant is heated by the supply of heat, then compressed and fed to a useful heat exchanger, and then cooled with expansion and fed back to the area of heat supply, according to Patent 29 50 61Θ, characterized in that the heat the heat supply is derived from the refrigerant, which is still warm before the useful heat exchange, and / or from the compressor (3) or a motor (3 ¹ ). 2. Heat pump for performing d- = s method according to claim 1, characterized in that a first strand section (4) carrying the refrigerant between Compressor (3) and useful heat exchanger (5), and / or the compressor (3) or a motor (3 ') with a working heat exchange is provided, an arrangement for transferring the heat of the refrigerant to a second strand section (13) is provided, in which the cool refrigerant (-1) is located. 130031 / 019S BAD ORIGINAL --- w ;. - ', rZ-? V- 3. Heat pump according to claim 2, characterized in that said working heat exchange to one Heat absorbing medium, e.g. B. water, leading and circulating circulatory system (11) takes place, which is also in a heat-exchanging contact (14) with which the cool refrigerant (1) carries second strand section (13) is. 4. Heat pump according to claim 3, characterized in that the circulatory system (11) has a bypass line (16) of the first strand section, or of the compressor (3) producing warmth or the motor (3 ') and the associated working heat exchange (4/10), the bypass line between this working heat exchange and the heat exchange (14, 13) of the second strand section (13) back into the circulatory system (11) enters and at this entry point there is a temperature mixing valve with adjustable temperature (17) is located. 5. Heat pump according to claim 3 or claims 3.and 4, characterized by a pump (22) which circulates the medium in the circulatory system (11). 6. Heat pump according to claim 2, characterized in that the working heat exchange directly between the first line section carrying the warm refrigerant or / unä which carries the expanded and cool refrigerant ., _ "and others,. second strand section / is provided. 130031/0195 7. Heat pump for carrying out the method according to claim 1, characterized in that the compressed and heated refrigerant of the line section (4) provided between the compressor (3) and the useful heat exchanger (5) is divided into two sub- ^{sections (4 1} , 4 ") , the first sub-line (4 ') for useful heat exchange (5) and the second sub-line (4 ") leading into the line section (9) of the refrigerant, which is located between a throttle (8) and the line area carrying the cool refrigerant (1) (13) is located. Θ. Heat pump according to one or more of Claims 2 to 7, characterized by a combination with one or more of the working heat exchanges according to the main patent. 13 0 0 3 1/019