GB2095395A - Ventilation apparatus in combination with a heat pump - Google Patents

Ventilation apparatus in combination with a heat pump Download PDF

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Publication number
GB2095395A
GB2095395A GB8202757A GB8202757A GB2095395A GB 2095395 A GB2095395 A GB 2095395A GB 8202757 A GB8202757 A GB 8202757A GB 8202757 A GB8202757 A GB 8202757A GB 2095395 A GB2095395 A GB 2095395A
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GB
United Kingdom
Prior art keywords
air
heat
door
cabinet
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8202757A
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GB2095395B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEATING ELEMENTS Ltd
Original Assignee
HEATING ELEMENTS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HEATING ELEMENTS Ltd filed Critical HEATING ELEMENTS Ltd
Priority to GB8202757A priority Critical patent/GB2095395B/en
Publication of GB2095395A publication Critical patent/GB2095395A/en
Application granted granted Critical
Publication of GB2095395B publication Critical patent/GB2095395B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
    • F24D11/0242—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0257—Central heating systems using heat accumulated in storage masses using heat pumps air heating system
    • F24D11/0278—Central heating systems using heat accumulated in storage masses using heat pumps air heating system with recuperation of waste energy
    • F24D11/0285—Central heating systems using heat accumulated in storage masses using heat pumps air heating system with recuperation of waste energy contained in exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
    • F24F12/003—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using a heat pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/13—Hot air central heating systems using heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ventilation (AREA)

Abstract

A ventilation apparatus, preferably in the form of a wall mounted cabinet, has an outlet 6 for air; an inside air intake, an outside air intake 10; a fan 18 for drawing air towards the outlet 6 from either intake; a heat pump with an evaporator 16 for extracting heat from air moving towards the outlet 6 and a valve means for directing inside and/or outside air to the outlet 6. The apparatus can thus function to extract heat from outside and/or inside air in accordance with the inside and outside temperature respectively. Preferably the valve means includes a cabinet door for exposing the inside air intake which is connected to a valve 24 for closing the outside air inlet as the inside air inlet is exposed. A filter may enable the inside air intake to function in the manner of an air extractor over a cooker. <IMAGE>

Description

SPECIFICATION Ventilation apparatus Field ofinvention The invention relates to ventilation apparatus particularly for use in kitchen, restaurants etc. where warm polluted air has at times to be ventilated to atmosphere.
Background ofinvention Heat pumps have been used to recover waste heat from warm air to be ventilated to atmosphere. It has been found that the usage of such heat pumps in less intensive applications, such as domestic kitchens, has been insufficient to justify installation on economic grounds. It is the main purpose of the invention to so arrange the ventilation apparatus including a heat pump that it is more beneficial.
Summary ofinvention According to the invention a ventilation apparatus having a heat pump is arranged for operation in an external source mode wherein the heat pump interacts with outside air to extract heat therefrom and/or in an internal source mode wherein the heat pump interacts with inside air to extract heat therefrom before ventilating it to atmosphere. In a most preferred form of the invention the apparatus is housed in a cabinet having an inside air intake (which may be positioned over a cooker); a heat pump; an outside air intake; an outlet to outside and a valve mechanism and fan for directing inside and/or outside air to the outlet and past the evaporatop coil of the heat pump.
If required the apparatus may permit flow from the outside air intake past the evaporator coil to be exhausted inside and hence cool the inside air. The heat absorbed by the evaporator coil can be transferred in a heat exchanger for the heating of water.
Thus the energy requirement for heating water from primary energy sources can be reduced, both during hot weather when heat is recovered mainly from outside air and during cold wether when heat can be supplemented and/or recovered mainly from inside air.
The invention thus permits ventilation apparatus to be used for heat extraction and hot water heating purposes for most of the year in temperate climates.
Obviously the heat exhanger can be used to heat other fluids than water.
Preferably the valve is operated by a lid or door on the front of the cabinet which is constructed for wall-mounting. The opening of the lid or door can expose a filter inlet for a head constituting the inside air intake. The valve mechanism may be connected to the lid or door so that when the inside air intake is opened the outside air intake is closed.
DRAWINGS Figure 1 shows a schematic perspective view of a wall cabinet with a front door removed according to the invention; Figure 2 shows a partly cut away side view of the cabinet of Figure 1 with a front door closed; Figure 3 shows a perspctive view of the cabinet of Figure 1 with the front door open; and Figure 4 shows a perspective view of a filter arrangement for the cabinet of Figures 1 to 3.
Specific description With reference to the Figures a wall mounted cabinet 2 has a lid or door 4 hinging about a transverse axis 5 at the top. When the door 4 is opened (see Figure 3) there is an outlet 6 for exhaust air, an inside air intake or inlet 8 formed by the door opening and an outside air intake 10. The air outlet 6 and the intake 10 can be arranged along different axes shown in dotted lines in Figure 2 to connect to ducting through walls orthrough ceilings. Afilter 12 (see Figure 4) is arranged to lie across the inside air intake 8. A duct 14 connects the intake 8 to a comprtment 15 containing a heat pump evaporator 16 and fan 18 (see Figure 1). The door 4 is connected through a wire 20 and pulleys 22 to close a valve flap 24 for the outside air intake 10 as the door 4 opens.
The compartment 15 may be a pre-assembled unit fitted into the cabinet 2. Apart from containing the fan 18 which is arranged in the air outlet 6, the evaporator 16 and the flap 24, it also contains a drip tray at 26. The cabinet 2 further contains a compressor 28 which is oil-cooled and a thermostatically controlled expansion valve 30 and drier 32. The cabinet 2 also supports a heat exhanger 33 for heating ore pre-heating water. The heat exchanger may be coiled, coaxial or a shell in tube type. An associated hot water storage tank may be contained in an adjacent wall mounted cabinet (not shown).
Hot and cold water connections are provided at 34 and 36. The heat pump system is of conventional lay out but optimized for operation in a heat extraction function.
In use the wall cabinet is preferably positioned over a source of waste heat such as a cooker. The door 4 can be opened only when required. The air is then propelled through the filter 12, between the door 4 and bellow type sides 11 past the evaporator 16 and to the outside by the fan 18. When the door is closed the fan can extract heat from outside air through the intake 10. Intermediate conditions can be provided by partly opening the door 4.
The filter 12 may be mounted on a fixed grating moving with the door 4. In Figure 4, the filter is mounted on a pair of foldable gratings 40 on frames 41 pivoted to the door 4 and the cabinet body to enable the interior space of the cabinet 2 to be used more fully. In yet another construction, the grating could be fixed to the bottom of the cabinet 2 and a further flap valve be used to permit air to pass through the grating and filter.
The duct 6 could have an opening to exhaust air either outside the building or inside. By exhausting air inside, the inside of a building can be cooled on hot days.
1. Ventilating apparatus including an outlet for air, an inside air intake, an outside air intake, a fan for drawing air from the intakes to the outlet, a heat
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Ventilation apparatus Field ofinvention The invention relates to ventilation apparatus particularly for use in kitchen, restaurants etc. where warm polluted air has at times to be ventilated to atmosphere. Background ofinvention Heat pumps have been used to recover waste heat from warm air to be ventilated to atmosphere. It has been found that the usage of such heat pumps in less intensive applications, such as domestic kitchens, has been insufficient to justify installation on economic grounds. It is the main purpose of the invention to so arrange the ventilation apparatus including a heat pump that it is more beneficial. Summary ofinvention According to the invention a ventilation apparatus having a heat pump is arranged for operation in an external source mode wherein the heat pump interacts with outside air to extract heat therefrom and/or in an internal source mode wherein the heat pump interacts with inside air to extract heat therefrom before ventilating it to atmosphere. In a most preferred form of the invention the apparatus is housed in a cabinet having an inside air intake (which may be positioned over a cooker); a heat pump; an outside air intake; an outlet to outside and a valve mechanism and fan for directing inside and/or outside air to the outlet and past the evaporatop coil of the heat pump. If required the apparatus may permit flow from the outside air intake past the evaporator coil to be exhausted inside and hence cool the inside air. The heat absorbed by the evaporator coil can be transferred in a heat exchanger for the heating of water. Thus the energy requirement for heating water from primary energy sources can be reduced, both during hot weather when heat is recovered mainly from outside air and during cold wether when heat can be supplemented and/or recovered mainly from inside air. The invention thus permits ventilation apparatus to be used for heat extraction and hot water heating purposes for most of the year in temperate climates. Obviously the heat exhanger can be used to heat other fluids than water. Preferably the valve is operated by a lid or door on the front of the cabinet which is constructed for wall-mounting. The opening of the lid or door can expose a filter inlet for a head constituting the inside air intake. The valve mechanism may be connected to the lid or door so that when the inside air intake is opened the outside air intake is closed. DRAWINGS Figure 1 shows a schematic perspective view of a wall cabinet with a front door removed according to the invention; Figure 2 shows a partly cut away side view of the cabinet of Figure 1 with a front door closed; Figure 3 shows a perspctive view of the cabinet of Figure 1 with the front door open; and Figure 4 shows a perspective view of a filter arrangement for the cabinet of Figures 1 to 3. Specific description With reference to the Figures a wall mounted cabinet 2 has a lid or door 4 hinging about a transverse axis 5 at the top. When the door 4 is opened (see Figure 3) there is an outlet 6 for exhaust air, an inside air intake or inlet 8 formed by the door opening and an outside air intake 10. The air outlet 6 and the intake 10 can be arranged along different axes shown in dotted lines in Figure 2 to connect to ducting through walls orthrough ceilings. Afilter 12 (see Figure 4) is arranged to lie across the inside air intake 8. A duct 14 connects the intake 8 to a comprtment 15 containing a heat pump evaporator 16 and fan 18 (see Figure 1). The door 4 is connected through a wire 20 and pulleys 22 to close a valve flap 24 for the outside air intake 10 as the door 4 opens. The compartment 15 may be a pre-assembled unit fitted into the cabinet 2. Apart from containing the fan 18 which is arranged in the air outlet 6, the evaporator 16 and the flap 24, it also contains a drip tray at 26. The cabinet 2 further contains a compressor 28 which is oil-cooled and a thermostatically controlled expansion valve 30 and drier 32. The cabinet 2 also supports a heat exhanger 33 for heating ore pre-heating water. The heat exchanger may be coiled, coaxial or a shell in tube type. An associated hot water storage tank may be contained in an adjacent wall mounted cabinet (not shown). Hot and cold water connections are provided at 34 and 36. The heat pump system is of conventional lay out but optimized for operation in a heat extraction function. In use the wall cabinet is preferably positioned over a source of waste heat such as a cooker. The door 4 can be opened only when required. The air is then propelled through the filter 12, between the door 4 and bellow type sides 11 past the evaporator 16 and to the outside by the fan 18. When the door is closed the fan can extract heat from outside air through the intake 10. Intermediate conditions can be provided by partly opening the door 4. The filter 12 may be mounted on a fixed grating moving with the door 4. In Figure 4, the filter is mounted on a pair of foldable gratings 40 on frames 41 pivoted to the door 4 and the cabinet body to enable the interior space of the cabinet 2 to be used more fully. In yet another construction, the grating could be fixed to the bottom of the cabinet 2 and a further flap valve be used to permit air to pass through the grating and filter. The duct 6 could have an opening to exhaust air either outside the building or inside. By exhausting air inside, the inside of a building can be cooled on hot days. CLAIMS
1. Ventilating apparatus including an outlet for air, an inside air intake, an outside air intake, a fan for drawing air from the intakes to the outlet, a heat pump having an evaporator coil for extracting heat from air on its way to the outlet, and valve means for directing inside and/or outside air to the outlet so as to enable the apparatus to function and extract heat from air in an internal source mode from inside air and in an external source mode from outside air.
2. Ventiling apparatus according to claim 1 also having valve means for directing flow of outside air to the inside and past the evaporator coil for cooling inside air.
3. Ventilating apparatus according to claim 1 or claim 2 in which the heat pump has a condenser in a heat exchanger for heating water
4. Ventilating apparatus according to any of the preceding claims in which the apparatus is in the form of a wall mountable cabinet having a movable door for exposing the inside air inlet and being connected so as to close the outside air inlet when exposing the inside air inlet.
5. Ventilating apparatus according to claim 4 in which a filter is mounted to filter inside air.
6. Ventilating apparatus according to any of the preceding claims in which means are provided for causing the air outlet to communicate with atmosphere outside a building and/or inside a building.
7. Ventiling apparatus substantially as described with reference to and as shown in the drawings.
GB8202757A 1981-03-13 1982-02-01 Ventilation apparatus in combination with a heat pump Expired GB2095395B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8202757A GB2095395B (en) 1981-03-13 1982-02-01 Ventilation apparatus in combination with a heat pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8107951 1981-03-13
GB8202757A GB2095395B (en) 1981-03-13 1982-02-01 Ventilation apparatus in combination with a heat pump

Publications (2)

Publication Number Publication Date
GB2095395A true GB2095395A (en) 1982-09-29
GB2095395B GB2095395B (en) 1985-02-27

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GB8202757A Expired GB2095395B (en) 1981-03-13 1982-02-01 Ventilation apparatus in combination with a heat pump

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676594A2 (en) * 1994-04-08 1995-10-11 Raoul Miserez Building heating system with heat pumps
NL1016063C2 (en) * 2000-08-31 2002-03-01 Gastec Nv A gas transit provided with an indoor heat exchanger associated with a heat pump.
DE102014007735A1 (en) 2013-05-29 2014-12-04 Samuel Wepf ventilation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676594A2 (en) * 1994-04-08 1995-10-11 Raoul Miserez Building heating system with heat pumps
EP0676594A3 (en) * 1994-04-08 1996-05-15 Raoul Miserez Building heating system with heat pumps.
NL1016063C2 (en) * 2000-08-31 2002-03-01 Gastec Nv A gas transit provided with an indoor heat exchanger associated with a heat pump.
EP1184627A1 (en) * 2000-08-31 2002-03-06 Gastec N.V. Gas feed-through comprising an indoor heat exchange associated with a heat pump
DE102014007735A1 (en) 2013-05-29 2014-12-04 Samuel Wepf ventilation

Also Published As

Publication number Publication date
GB2095395B (en) 1985-02-27

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PCNP Patent ceased through non-payment of renewal fee