WO1993012390A1

WO1993012390A1 - A space-heating system using a heat pump with an underfloor tube arrangement

Info

Publication number: WO1993012390A1
Application number: PCT/SE1992/000871
Authority: WO
Inventors: Heimer Andersson
Original assignee: Heimer Andersson Ab
Priority date: 1991-12-17
Filing date: 1992-12-16
Publication date: 1993-06-24
Also published as: ATE155224T1; SE9103725L; DE69220811D1; EP0616675A1; EP0616675B1; SE9103725D0; SE469805B

Abstract

The present invention relates to an installation for heating a premises (A, B) with one or more rooms in a building, which comprises a compressor (1) for compressing a coolant medium from a vaporization coil (2) which is coupled to the input side of the compressor (1) and which is disposed in a region (3) outside the premises (A, B) for thermal absorption from the surroundings, the output side of the compressor (1) being coupled to a coil (4) disposed in the premises (A, B) for condensing the coolant compressed in the compressor (1) and that the vaporization coil (2) is interconnected to the condensation coil (4).

Description

A Space-Heating System Using a Heat Pump with an Underfloor Tube Arrangement.

The present invention relates to an installation for heating a premises with one or more rooms in a building, which comprises compressor for compressing a coolant medium from a vaporizatio coil which is coupled to the input side of the compressor and which is disposed in a region outside the premises for thermal absorption from the surroundings.

Known heating installations have a relatively complicated con¬ struction which entails both high manufacturing costs and high installation costs. Moreover known heating installations entai high running costs in addition to which are primarily added th requisite energy consumption for the desired heat exchange.

One object of the present invention is to realize a new heatin installation with improved properties than hitherto known hea¬ ting installations.

This object is satisfied according to the present invention in the installation disclosed in the introduction, in that the output side of the compressor is coupled to a coil disposed in the premises for condensing the coolant compressed in the comp ressor and that the vaporization coil is interconnected to the condensation coil. The condensation coil is disposed in a flooring structure beneath the premises. For pressure reductio a throttle member is disposed in the transition between the co densation coil and the vaporization coil. The first part of th condensation coil in the flooring structure beneath the premis is thermally insulated so as to counteract transfer of heat therefrom to the surroundings. The thermal insulation is devid into a first part closest to the compressor and mutually following second part. The thermal insulation in the first par has greater thermal insulation capacity than the thermal in- sulation in the second part. The thermal insulation in the fir part ia a plastic coating and a number of air layers closest t condensation coil itself. The thermal insulation on the second part is a plastic layer direct on the condensation coil.

Thrcvir . the present invention there will be achieved a new heating installation which, in comparison with previously known heating installations has a simpler construction, which contri¬ butes in considerably lower costs than for known constructions. The simpler construction which is made possible through the present invention moreover also reduces maintenance and repair costs. Through the present invention pumps or fans will no longer be required, which entails lower energy consumption and thereby affords to the installation according to the present invention considerably higher energy and/or power factor than hitherto known heating installations.

One embodiment of the present invention will be described more closely hereinbelow with reference to the accompanying drawings. Fig 1 is a skeleton diagram of one embodiment of a heating installation according to the present invention. Fig 2 shows a cross section along the line II-II in fig 1. Fig 3 shows a cross section along the line III-III in fig 1.

The embodiment of a heating installation according to the pre- sent invention shown on the drawings is intended for heating a premises 5 with one or more rooms in a building which is defined by the lines A and B. These may also constitute defining lines for a flooring structure in the premises 5. In the flooring structure, there is disposed a pipe coil 4 whose input side is coupled to the output side from a compressor 1 which is located on the outside of the building A, B. The opposite end of the coil 4 relative to the compressor is coupled via a throttle member 6 to an outer pipe coil 2 whose opposite end relative to the throttle member 6 is coupled to the input side of the comp- ressor 1. The pipe coil 2 consists of a vaporization coil which is disposed in a per se known manner in a ground region 3 on the outside of the building A, B. Thus, the pipe coil 2 shall advan¬ tageously be disposed at a frost-free depth and with suitable spacing between the different parts in the coil. The parts are shown as parallel portions on the drawing. The pipe coil 2 can also consist of two mutually interconnected parallel coils.

On the first part of the condenser coil 4 in the flooring struc¬ ture there is disposed a thermal insulation 7 which is followed b an additional thermal insulation 10. The thermal insulation consists of a suitable plastic layer 8 which is tubular and is on the inside provided with flanges F, which rest on the pipe itself in the pipe coil 4 and there¬ between form air gaps 9. The air gaps 9 form together with the 5. plastic coating 8 itself a resistance to transfer of heat from the coolant in the coil 4 to the surroundings.

The thermal insulation 10 on the condensation coil 4 after the thermal insulation 7 consists of a plastic coating 11 which is 0 applied direct on the pipe wall in the coil 4. This gives lesse thermal insulation and greater thermal transfer to the surroun¬ dings than the thermal insulation 7. Through this successive reduction of the thermal insulation on the coil 4 there is achieved a certain precondensation in the pipe coil most close 5 to the output side of the compressor 1 without the risk of an unacceptably high surface temperature on the flooring structure in the premises 5.

In one prototype of the embodiment of a heating installation 0 according to the present invention shown on the drawings a copper pipe of 3/8" diameter of normal cooling pipe and length of approx. 45 was applied in the coil 4. In the vaporization coil 2 two parallel coils each of 15 m and diameter 3/8" were utilized. The coolant was R22 but 134A can also be applicable 5 and naturally also other types of coolants. The compressor 1 has on a power output of 300 W and the achieved power factor has been calculated at 3,84 at the time of start-up and can today be calculated at approx. 3,5.

0 Many modifications are naturally possible without departing from the inventive concept defined in the appended claims.

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Claims

1. Installation for heating a premises (A, B) with one or more rooms in a building, which comprises a compressor (1) for comp- reεsing a coolant medium from a vaporization coil (2) which is coupled to the input side of the compressor (1) and which is disposed in a region (3) outside the premises (A, B) for therma absorption from the surroundings, characterized in that the output side of the compressor (1) is coupled to a coil (4) disposed in the premises (A, B) for condensing the coolant compressed in the compressor (1), in that the vaporization coil (2) is interconnected to the condensation coil (4) and in that the first part of the condensation coil (4) in the flooring structure (5) beneath the premises (A, B) is thermally insulate (7, 10) for counteracting transfer of heat from the same to the surroundings.

2. Installation according to claim 1, characterized in that the thermal insulation is divided into a first part (7) closest to the compressor (1) and a second part (10) following thereon.

3. Installation according to claim 2, characterized in that the thermal insulation (7) on the first part has greater thermal insulation capacity than the thermal insulation (10) on the second part.

4. Installation according to claim 2 or 3, characterized in tha the thermal insulation (7) and a number of air layers (9) clo¬ sest to the condensation coil (4) itself.

5. Installation according to claim 3, characterized in that the thermal insulation (10) on the second part is a plastic layer (11) direct on the condensation coil (4).