An office air conditioning system that reduces operating energy consumption and improves comfort

Abstract

The utility model discloses an office air conditioning system that reduces operating energy consumption and improves comfort, including an outer area curtain wall air conditioner / low-profile fan coil, an inner area radiant cooling / heating metal ceiling with water coil, and a fresh air system; the utility model is characterized in that the outer area curtain wall air conditioner / low-profile fan coil is connected to a first host combination through an outer area cold and hot water pipe to form an office outer area air conditioning subsystem; the inner area radiant cooling / heating metal ceiling with water coil is connected to a second host combination through an inner area cold and hot water pipe to form an office inner area air conditioning subsystem. The purpose of noise reduction and air blowing without air conditioning is achieved, the indoor office comfort is improved, the refrigeration performance of the refrigeration unit is improved, and the purpose of reducing operating energy consumption is achieved, and it can be widely promoted and used in the design of new office buildings.

Description

Technical Field

[0001] The utility model relates to air conditioning technology, in particular to an office air conditioning system which reduces operating energy consumption and improves comfort. Background Art

[0002] my country is in a critical period of carbon peak and carbon neutrality, and energy conservation and emission reduction is one of the important tasks at present. Air conditioning energy consumption accounts for the largest proportion of general building energy consumption, and how to reduce building air conditioning energy consumption is also receiving more and more attention from the industry. Office buildings have a high density of people, and everyone has different requirements for indoor temperature and indoor wind speed. Research on how to improve the indoor comfort of office buildings has received more and more attention from the industry.

[0003] The existing office building air conditioning system usually adopts multi-split + fresh air system, fan coil + fresh air system, VAV air conditioning system, etc. The most important feature of the above systems is convection heat exchange, that is, the air conditioning system uses the air outlet to send air to the office area to achieve indoor cooling and heating. Office buildings usually have a high density of people and fixed seats. Therefore, air conditioning air supply often has a great impact on the comfort of office workers in the air supply area, such as strong blowing feeling and noise, thereby reducing the comfort of the indoor office environment. Summary of the invention

[0004] The purpose of the utility model is to solve the above-mentioned problems and to provide an office air-conditioning system which reduces operating energy consumption and improves comfort. Different air-conditioning equipment is respectively arranged in the inner and outer areas of the office, that is, curtain wall air conditioners and low-profile fan coils are adopted in the outer area, and radiant cooling / heating metal ceilings with water coils are adopted in the inner area, so as to achieve the purpose of reducing noise, eliminating air-conditioning blowing, improving indoor comfort, and greatly improving the refrigeration performance of the refrigeration unit, thereby reducing operating energy consumption.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: an office air conditioning system that reduces operating energy consumption and improves comfort, including an outer area curtain wall air conditioner / low-profile fan coil, an inner area radiant cooling / heating metal ceiling with water coil, and a fresh air system; characterized in that:

[0006] The above-mentioned outer area curtain wall air conditioner / low-profile fan coil unit is connected to the first host assembly through the outer area cold and hot water pipes to form an office outer area air conditioning subsystem.

[0007] The above-mentioned radiant cooling / heating metal ceiling with water coil in the inner area is connected to the second host assembly through the inner area cold and hot water pipes to form an office inner area air conditioning subsystem.

[0008] The aforementioned office air conditioning system that reduces operating energy consumption and improves comfort, preferably, the first host combination includes a first refrigeration unit and a first heating unit arranged in parallel, wherein the first refrigeration unit provides 7-12°C chilled water, and the first heating unit provides hot water between 50°C and 60°C.

[0009] The aforementioned office air conditioning system that reduces operating energy consumption and improves comfort is preferably configured such that the first refrigeration unit and the first heating unit are respectively provided with circulating water pumps, and a control valve and a thermostat connected to the circulating water pump are provided at the outer area curtain wall air conditioner / low-profile fan coil unit.

[0010] The aforementioned office air conditioning system that reduces operating energy consumption and improves comfort, preferably, the second host combination includes a second refrigeration unit and a second heating unit arranged in parallel, wherein the second refrigeration unit provides 16-19°C chilled water, and the second heating unit provides 35-30°C hot water.

[0011] The aforementioned office air-conditioning system that reduces operating energy consumption and improves comfort is preferably configured such that the second refrigeration unit and the second heating unit are respectively provided with circulating water pumps, and a control valve and a thermostat connected to the circulating water pump are provided at the radiant cooling / heating metal ceiling with water coil in the inner zone.

[0012] The aforementioned office air conditioning system that reduces operating energy consumption and improves comfort is preferably divided into an outer office area and an inner office area by an office plane, wherein the outer area is the area from the outer protective structure to a depth of 3 to 4 meters indoors; the other areas are the inner office area.

[0013] The aforementioned office air conditioning system that reduces operating energy consumption and improves comfort is preferably configured such that the fresh air systems for the inner and outer zones are independently arranged.

[0014] The aforementioned office air-conditioning system that reduces operating energy consumption and improves comfort is preferably used in summer cooling conditions: the first refrigeration unit provides chilled water with a supply and return water temperature of 7 to 12°C to the curtain wall air conditioner / low-profile fan coil unit in the outer area, and performs air conditioning and cooling of the outer area of ​​the office, while also assuming the dehumidification function; the second refrigeration unit provides high-temperature chilled water with a supply and return water temperature of 16 to 19°C to the radiant cooling / heating metal ceiling with water coils in the inner area, and performs radiant air conditioning and cooling of the inner area of ​​the office.

[0015] The aforementioned office air-conditioning system that reduces operating energy consumption and improves comfort is preferably used in winter heating conditions: the first heating unit provides hot water with a supply and return water temperature of 60-50°C to the curtain wall air conditioner / low-profile fan coil unit in the outer area to air-condition and heat the outer area of ​​the office; when there is a cold load in the inner area of ​​the office, the second refrigeration unit provides high-temperature chilled water with a supply and return water temperature of 16-19°C to the radiant cooling / heating metal ceiling with water coils in the inner area, and performs radiant air-conditioning and cooling on the inner area; when there is a heat load in the inner area of ​​the office, the second heating unit provides hot water with a supply and return water temperature of 35-30°C to the radiant cooling / heating metal ceiling with water coils in the inner area, and performs radiant air-conditioning and heating on the inner area.

[0016] According to the use characteristics of office buildings, based on energy conservation and the requirements for improving indoor air conditioning comfort, this technical solution divides the office plane into an outer area and an inner area. The outer area is the area from the external protective structure (including windows, walls, glass curtain walls, etc.) to the indoor depth of 3 to 4 meters; other office areas are defined as inner areas. Air conditioning subsystems are set up in the two areas to meet the energy-saving and comfortable air conditioning needs of the office area.

[0017] This technical solution sets different air conditioning equipment in the inner and outer areas of the office, that is, the outer area air conditioning adopts the outer area curtain wall air conditioner / low fan coil, and the inner area air conditioning adopts radiant cooling / hot metal ceiling with water coil. The inner and outer area fresh air systems are set independently to achieve the goal of reducing noise, no air conditioning blowing, and improving indoor office comfort. Because the inner area uses high-temperature chilled water with a supply and return water temperature of 16 to 19 degrees for cooling, the refrigeration performance of the chiller is greatly improved, achieving the purpose of reducing operating energy consumption.

[0018] Compared with the prior art, the beneficial effects of the utility model are: according to the humanized characteristics of office building use, the office area is divided into inside and outside and different air-conditioning equipment is set respectively, so as to achieve the purpose of noise reduction and air-conditioning-free blowing, thereby improving the indoor office comfort, and the inner area adopts high-temperature chilled water with a supply and return water temperature of 16 to 19 degrees for cooling, thereby greatly improving the refrigeration performance of the refrigeration unit and achieving the purpose of reducing operating energy consumption. It can be widely promoted and used in the design of new office buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a plane local structure of the utility model.

[0020] Figure 2 The utility model is a system diagram.

[0021] In the figure: 1- curtain wall air conditioner / low-profile fan coil in outer area, 2- radiant cooling / heating metal ceiling with water coil in inner area, 3- cold and hot water pipes in outer area, 4- cold and hot water pipes in inner area, 5- fresh air system, 6- first refrigeration unit, 7- second refrigeration unit, 8- first heating unit, 9- second heating unit, 10- circulating water pump, 11- control valve, 12- thermostat. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and drawings.

[0023] An office air conditioning system that reduces operating energy consumption and improves comfort includes an outer area curtain wall air conditioner / low-profile fan coil 1, an inner area radiant cooling / heating metal ceiling with water coil 2, and a fresh air system 5. The outer office area and the inner office area are divided by the office plane, such as Figure 1 As shown, the outer area is the area from the outer protective structure to the indoor depth of 3.5 meters, and the other areas are the inner office area; the fresh air systems 5 of the inner and outer areas are independently set.

[0024] The outer area curtain wall air conditioner / low-profile fan coil 1 is composed of three major parts: a fan, a motor, and a hot and cold coil. The hot and cold coil is connected to the hot and cold water pipes of the air conditioner, and the heat of the hot and cold water in the pipe is exchanged through the hot and cold coil to the air circulated indoors by the fan driven by the motor to perform air conditioning in the room. The radiant cooling / heating metal ceiling 2 with water coil is composed of a water coil and a metal ceiling. The water coil is welded and die-cast in the metal ceiling. The water coil is connected to the hot and cold water pipes of the air conditioner, and the heat of the hot and cold water in the pipe is directly radiated through the metal ceiling for cooling and heating, thereby achieving the purpose of air conditioning. The outer area curtain wall air conditioner / low-profile fan coil 1 and the inner area radiant cooling / heating metal ceiling 2 with water coil in this embodiment are both conventional technical selections, which will not be repeated here.

[0025] See also Figure 2 , the two areas are respectively provided with air conditioning subsystems: the aforementioned outer area curtain wall air conditioner / low-profile fan coil unit 1 is connected to the first host combination through the outer area cold and hot water pipe 3 to form the office outer area air conditioning subsystem. The first host combination includes a first refrigeration unit 6 and a first heating unit 8 arranged in parallel, wherein the first refrigeration unit provides 7-12℃ chilled water, and the first heating unit provides hot water between 60℃ and 50℃. The first refrigeration unit 6 and the first heating unit 8 are respectively equipped with a circulating water pump 10, and a control valve 11 and a thermostat 12 connected to the circulating water pump 10 are provided at the outer area curtain wall air conditioner / low-profile fan coil unit 1.

[0026] The aforementioned radiant cooling / heating metal ceiling 2 with water coils in the inner area is connected to the second host combination through the inner area cold and hot water pipes 4 to form an office inner area air conditioning subsystem. The office inner area air conditioning subsystem uses high-temperature chilled water with a supply and return water temperature of 16 to 19 degrees for cooling. Specifically, the second host combination includes a second refrigeration unit 7 and a second heating unit 9 arranged in parallel, wherein the second refrigeration unit provides 16 to 19°C chilled water, and the second heating unit provides 35 to 30°C hot water for heating. The second refrigeration unit 7 and the second heating unit 9 are respectively equipped with a circulating water pump 10. Similarly, a control valve 11 and a thermostat 12 connected to the circulating water pump 10 are provided at the radiant cooling / heating metal ceiling 2 with water coils in the inner area.

[0027] In the summer cooling condition, the first refrigeration unit 6 provides chilled water with a supply and return water temperature of 7 to 12 degrees to the cold and hot water pipes 3 in the outer area through the circulating water pump 10, and the curtain wall air conditioner / low-profile fan coil 1 in the outer area performs air conditioning and refrigeration on the outer area, and also assumes the dehumidification function. The second refrigeration unit 7 provides high-temperature chilled water with a supply and return water temperature of 16 to 19 degrees to the cold and hot water pipes 4 in the inner area through the configured circulating water pump 10, and the radiation cooling / heating metal ceiling 2 with water coils in the inner area performs radiation air conditioning and refrigeration on the inner area.

[0028] In winter heating conditions, the first heating unit 8 provides hot water with a return water temperature of 60 to 50 degrees to the cold and hot water pipes 3 in the outer area through the circulating water pump 10, and the curtain wall air conditioner / low-profile fan coil 1 in the outer area performs air conditioning and heating for the outer area. When there is a cold load in the inner area, the second refrigeration unit 7 provides high-temperature chilled water with a return water temperature of 16 to 19 degrees to the cold and hot water pipes 4 in the inner area through the circulating water pump 10, and the radiant cooling / heating metal ceiling 2 in the inner area with a water coil performs radiant air conditioning and cooling for the inner area. When there is a heat load in the inner area, the second heating unit 9 provides hot water with a return water temperature of 35 to 30 degrees to the cold and hot water pipes 4 in the inner area through the circulating water pump 10, and the radiant cooling / heating metal ceiling 2 in the inner area with a water coil performs radiant air conditioning and heating for the inner area.

[0029] Independent fresh air systems 5 are set up in the inner and outer zones respectively. The fresh air in the outer zone is sent to the outer zone after being processed to the isotropic state point indoor in the outer zone in summer, and is sent to the outer zone after being processed to the isothermal state point indoor in the outer zone in winter. The fresh air in the inner zone is sent to the inner zone after being processed to the isotropic state point indoor in the inner zone in summer. In winter, when there is a cooling load in the inner zone, the fresh air is heated to 10 degrees and sent to the inner zone to bear part of the indoor cooling load. When there is a heat load in the inner zone, the fresh air is sent to the inner zone after being processed to the isothermal state point indoor in the inner zone.

[0030] Independent thermostats 12 are provided for the inner and outer zones, and the control valves 11 of the curtain wall air conditioner / low-profile fan coil 1 in the outer zone and the radiation cooling / heating metal ceiling 2 with water coil in the inner zone are controlled by setting the temperature to adjust the indoor temperature.

[0031] The above embodiments are for explanation of the present invention, not for limitation of the present invention. Any simple transformation of the present invention by ordinary technicians in this field without departing from the principle of the present technical solution and without creative work shall fall within the protection scope of the present invention.

Claims

1. An office air conditioning system for reducing operating energy consumption and improving comfort, comprising an outer area curtain wall air conditioner / low-profile fan coil unit (1), an inner area radiant cooling / heating metal ceiling with water coil (2), and a fresh air system (5); characterized in that: The above-mentioned outer area curtain wall air conditioner / low-profile fan coil unit is connected to the first host assembly through the outer area cold and hot water pipes (3) to form an office outer area air conditioning subsystem; The above-mentioned radiation cooling / heating metal ceiling with water coil in the inner area is connected to the second host assembly through the inner area cold and hot water pipes (4) to form an office inner area air conditioning subsystem.

2. An office air conditioning system for reducing operating energy consumption and improving comfort according to claim 1, characterized in that: The first host assembly comprises a first refrigeration unit (6) and a first heating unit (8) which are arranged in parallel, wherein the first refrigeration unit provides chilled water at 7 to 12°C, and the first heating unit provides hot water at a temperature between 50°C and 60°C.

3. An office air conditioning system for reducing operating energy consumption and improving comfort according to claim 2, characterized in that: The first refrigeration unit (6) and the first heating unit (8) are respectively equipped with a circulating water pump (10), and a control valve and a temperature controller connected to the circulating water pump are provided at the location of the outer area curtain wall air conditioner / low-profile fan coil unit (1).

4. The office air conditioning system for reducing operating energy consumption and improving comfort according to claim 1, characterized in that: The second host assembly comprises a second refrigeration unit (7) and a second heating unit (9) arranged in parallel, wherein the second refrigeration unit provides 16-19°C chilled water, and the second heating unit provides 35-30°C hot water.

5. The office air conditioning system for reducing operating energy consumption and improving comfort according to claim 4, characterized in that: The second refrigeration unit (7) and the second heating unit (9) are respectively equipped with a circulating water pump (10), and a control valve and a thermostat connected to the circulating water pump are provided at the radiation cooling / heating metal ceiling (2) with water coil in the inner zone.

6. The office air conditioning system for reducing operating energy consumption and improving comfort according to claim 1, characterized in that: The outer office area and the inner office area are divided according to the office plane, wherein the outer area is the area from the outer protective structure to the indoor depth of 3 to 4 meters; the other area is the inner office area.

7. An office air conditioning system for reducing operating energy consumption and improving comfort according to claim 1 or 6, characterized in that: The inner zone and outer zone fresh air systems (5) are independently arranged.

8. An office air conditioning system for reducing operating energy consumption and improving comfort according to claim 2, 3, 4 or 5, characterized in that: Summer cooling conditions: The first refrigeration unit (6) provides chilled water with a supply and return water temperature of 7 to 12°C to the curtain wall air conditioner / low-profile fan coil unit (1) in the outer area, performs air conditioning and cooling on the outer office area, and also performs a dehumidification function; the second refrigeration unit (7) provides high-temperature chilled water with a supply and return water temperature of 16 to 19°C to the radiant cooling / heating metal ceiling (2) with a water coil in the inner area, performs radiant air conditioning and cooling on the inner office area.

9. An office air conditioning system for reducing operating energy consumption and improving comfort according to claim 2, 3, 4 or 5, characterized in that: Winter heating conditions: the first heating unit (8) provides hot water with a supply and return water temperature of 60 to 50°C to the curtain wall air conditioner / low-profile fan coil unit (1) in the outer area, and performs air conditioning and heating on the outer office area; when there is a cold load in the inner office area, the second refrigeration unit (7) provides high-temperature chilled water with a supply and return water temperature of 16 to 19°C to the radiant cooling / heating metal ceiling (2) with a water coil in the inner area, and performs radiant air conditioning and cooling on the inner area; when there is a heat load in the inner office area, the second heating unit (9) provides hot water with a supply and return water temperature of 35 to 30°C to the radiant cooling / heating metal ceiling (2) with a water coil in the inner area, and performs radiant air conditioning and heating on the inner area.

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