JP2005241080A - Refrigeration system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigeration system assisting cooling of a living room and a bedroom by storing cold air generated from a hot-water supply means for performing hot-water supply operation by refrigerating cycle. <P>SOLUTION: This refrigeration system is provided with a refrigeration assisting means 23 for storing cold air generated when performing hot-water supply operation of a hot-water supply means 1 for performing hot-water supply operation by refrigerating cycle in a cold air storage space in a building and supplying the cold air stored in the cold air storage space into an indoor space to be cooled when an air conditioning means 29 for cooling the indoor space in the building starts refrigeration operation so that a room space can be cooled more quickly than cooling by only the air conditioning means 29 and electric power consumption for refrigeration operation can be saved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling device using cold air generated during operation of a heat pump type hot water heater.

  Conventionally, in this type, there was a heat pump type water heater that uses a chlorofluorocarbon refrigerant as the refrigerant of the heat pump cycle, but the ozone depletion coefficient and the global warming coefficient are good for the chlorofluorocarbon refrigerant, Furthermore, a heat pump type water heater using a natural refrigerant such as carbon dioxide capable of high temperature difference heating as a refrigerant has been developed and is beginning to spread.

  By the way, this natural refrigerant heat pump type hot water heater absorbs heat from the air supplied from the outside, heats the water with the absorbed heat, stores hot hot water, and absorbs the low-temperature air as it is. Although it is exhausted outdoors, the heat pump water heater using natural refrigerant has higher energy consumption efficiency compared to the heat pump water heater using chlorofluorocarbon refrigerant, and the hot water to be stored can be heated to a high temperature. The temperature difference from the exhausted air was very large.

Therefore, there is one that uses the exhausted air that is in a cold state at a low temperature with respect to the outside air without using it as it is (see, for example, Patent Document 1), which is a heat pump type hot water supply using carbon dioxide. When the machine is operating, low-temperature air exhausted from the heat pump unit is supplied to the under floor of the building and the attic through a duct.
JP 2002-89880 A

  This forcibly ventilates the under floor and attic to prevent decay of base and under floor materials, mold, and insect damage due to moisture, and also prevents the buildup of hot air in the attic and improves the comfort of the room under the ceiling It can be made.

In addition, when a heat pump type water heater using carbon dioxide is in operation, there is also a type that supplies low-temperature air exhausted from the heat pump unit to a toilet, a washroom, a dressing room, a bathroom, etc. through a duct. . (For example, see Patent Document 2)
JP 2002-89883 A

  This makes it possible to change the uncomfortable toilet and washroom into a comfortable space with hot air in the summer, and to dry the bathroom early and dry the laundry suspended in the rain.

  By the way, in this prior art, for example, in Japanese Patent Application Laid-Open No. 2002-89880, when a heat pump type water heater using carbon dioxide is in operation, low temperature air exhausted from a heat pump unit is passed through a duct. However, it is not possible to directly cool a room where people are present.

  In JP-A No. 2002-89883, when a heat pump type hot water heater using carbon dioxide is in operation, low temperature air exhausted from the heat pump unit is supplied to a toilet, a washroom, a dressing room, a bath through a duct. To cool the toilets, washrooms, dressing rooms, bathrooms, etc. in the building, but if the operation of the heat pump water heater using carbon dioxide is short, the toilets and washrooms The low temperature exhausted from the heat pump unit so that the dressing room, bathroom, etc. cannot be cooled to a comfortable temperature, and the toilet, washroom, dressing room, bathroom, etc. can be cooled as stably as possible. Provide cool storage air that is cooled by the air in the room, and cool air in the cool air outlets of toilets, washrooms, dressing rooms, bathrooms, etc. so as not to overcool toilets, washrooms, dressing rooms, bathrooms, etc. Or providing a damper for adjusting the feed rate, there was a low-temperature air and the outside air exhausted from the heat pump unit it is necessary or provided a damper for air mixing.

  Also, in this Japanese Patent Laid-Open No. 2002-89883, toilets, washrooms, dressing rooms, bathrooms, etc. are used to cool a space where people are present, but toilets, washrooms, dressing rooms, bathrooms, etc. are compared to living rooms and bedrooms. It is a place where people are short, and it cannot be said that the low-temperature air exhausted from the heat pump unit is fully utilized effectively.

  The present invention solves the above-mentioned problem, and cool air discharged from the heat pump unit when the heat pump water heater using natural refrigerant is in operation, a cool storage agent, an air mix, a damper for adjusting a cold air supply amount, etc. Therefore, the present invention provides a cooling device that assists the cooling of the living room or bedroom by the operation of the heat pump water heater using natural refrigerant without requiring the above-described equipment.

  This invention pays attention to this point and solves the above-mentioned problems. In particular, in claim 1, the structure is particularly configured so that the cold air generated during the hot water supply operation of the hot water supply means for performing the hot water supply operation by the refrigeration cycle is introduced into the building by the cold supply air means. In the cooling device to be supplied, the cold air is stored in a cold storage space in the building, and the air stored in the cold storage space is cooled when the air conditioning means for air conditioning the indoor space in the building starts the cooling operation. Provided with cooling assistance means for supplying to the indoor space.

  Further, in the cooling device according to claim 2 of the present invention, in particular, the configuration thereof is as described in claim 1, wherein the hot water supply means includes a compressor, a water heating heat exchanger, an expansion valve, and air heat exchange. The refrigeration cycle is constituted by a heater, and the heat pump unit for hot water supply that uses carbon dioxide as a heat medium of the refrigeration cycle and uses the carbon dioxide in a supercritical state, and heat is exchanged and heated by the heat pump unit for hot water supply. The building has a highly airtight and highly heat insulating structure, and the cold storage space is an attic space or a ceiling space having a highly airtight and highly heat insulating structure.

  Further, in the cooling device according to claim 3 of the present invention, in particular, in the configuration of claim 1 or 2, the cooling auxiliary means includes a room temperature sensor for detecting the temperature of the indoor space, and an attic of the cold storage space. The temperature sensor for the attic that detects the temperature of the space or the attic space, the ventilator with the cooling auxiliary opening / closing valve that connects the attic and the living room, the ceiling and the living room, and the air conditioning means starts the cooling operation Compare the temperature of the attic space or the ceiling space with the room space below it, and if the temperature of the room space is lower, keep the air-cooling auxiliary open / close valve closed and the temperature of the room space When the temperature of the room is higher, open the cooling assist on / off valve, and after opening the cooling assist on / off valve, perform the cooling assist operation to close the cooling assist on / off valve when the temperature of the living room temperature becomes lower An operation panel control unit is provided.

  Further, in the cooling device according to claim 4 of the present invention, in particular, in the cooling device according to claim 3, cold air generated by the hot water supply means is supplied to the attic space or the ceiling space that is the cold storage space. When started, it will be equipped with an open / close ventilator that exhausts the air in the attic space and the ceiling space to the outside.

  According to the first aspect of the present invention, in the cooling device that supplies the cold air generated during the hot water supply operation of the hot water supply means that performs the hot water supply operation by the refrigeration cycle into the building by the cold water supply means, the cold air is generated in the building. When the air-conditioning means stored in the cold storage space and air-conditioning the indoor space in the building starts the cooling operation, it is provided with cooling auxiliary means for supplying the cold air stored in the cold-storage space to the indoor space to be cooled. is there.

  As a result, the cold air generated during the hot water supply operation of the hot water supply means that performs the hot water supply operation by the refrigeration cycle is supplied to the attic space or the ceiling space that is the cold storage space, and the air conditioning means starts the cooling operation of the room space in the building. Since the cool air stored in the cold storage space is supplied to the indoor space to be cooled, the room space can be cooled faster than the air conditioning means alone, and the power consumption by the air conditioning means performing the cooling operation is saved. It can be done.

  According to claim 2, in claim 1, the hot water supply means constitutes a refrigeration cycle with a compressor, a water heating heat exchanger, an expansion valve, and an air heat exchanger, the refrigeration cycle. A hot water supply heat pump unit that uses carbon dioxide as a heating medium in a supercritical state, and a tank unit that stores hot water heated by heat exchange by the hot water heat pump unit. The building has a highly airtight and highly heat insulating structure, and the cold storage space is an attic space or a ceiling space having a highly airtight and highly heat insulating structure. ,

  As a result, the energy consumption efficiency is higher and the hot water supply operation can be performed at a higher temperature than the hot water supply means that performs the hot water supply operation by the refrigeration cycle using the conventional heat medium, and moreover than the hot water supply means that uses the conventional heat medium. Since cold air with low temperature is generated as a by-product of hot water supply operation and exhausted, low-temperature cold air that can assist cooling operation can be generated without consuming electric power to generate cold air. By storing low-temperature cold air in a cold storage space with high airtightness and high thermal insulation, the temperature of the stored cold air can be prevented and the cold air in the cold storage space can be kept at a low temperature, and the temperature is low. The cold air in the cold storage space maintained in step (2) can be supplied to the indoor space to be cooled when the air conditioning means starts the cooling operation, thereby assisting in the cooling operation.

  According to a third aspect of the present invention, in the first or second aspect, the cooling assistance means includes a room temperature sensor that detects the temperature of the indoor space, and an attic that detects the temperature of the attic space or the ceiling space of the cold storage space. And a vent pipe provided with a cooling auxiliary on-off valve that communicates the attic and the living room, the attic and the living room, and the air conditioning means starts the cooling operation. Comparing the temperature of the lower room space, when the temperature of the room space is lower, keep the ventilator's cooling auxiliary open / close valve closed, and when the temperature of the room space is higher, the air conditioning auxiliary opening / closing After the valve is opened and the cooling auxiliary opening / closing valve is opened, when the temperature of the room space becomes lower, an operation panel control unit that performs a cooling auxiliary operation for closing the cooling auxiliary opening / closing valve is provided.

  As a result, when the cooling operation can be assisted by supplying the air to the indoor space to be cooled, that is, when the temperature of the cool air in the cold storage space is lower than that of the indoor space to be cooled, the vent pipe provided with the cooling auxiliary opening / closing valve is opened. Therefore, the cooling air in the cool storage space descends to the living room space through the ventilation pipe and lowers the temperature of the air in the lower room space, thereby air-conditioning the lower room space. Thus, it is possible to cool down to a set temperature in the lower room space faster than cooling only by the cooling operation of the air conditioner, and to save power consumed by the cooling operation of the air conditioning means.

  Also, if the temperature in the cool storage space is higher than that in the indoor space where the air is cooled, the cooling assist operation is performed and the cool air remains stored in the cool storage space. The temperature of the room is low, and the temperature rise of the attic and ceiling space due to sunlight in the daytime can be suppressed. As a result, the cooling operation in the house can be weakened, and the electricity charge can be reduced accordingly. It can be done.

  According to the fourth aspect of the present invention, when the supply of cold air generated by the hot water supply means is started to the attic space or the ceiling space which is the cold storage space in the third aspect, the attic space or the ceiling space is started. An open / close type exhaust fan that exhausts the air outside is provided.

  As a result, the cool air exhausted from the hot water supply heat pump unit blows into the space from above the attic space, which is a cold storage space, and from above the ceiling space, and has a higher temperature than the cool air that is blown out. As the air inside is exhausted to the outside from below the attic space and the ceiling space, the temperature in the attic space and the ceiling space rapidly decreases, and the temperature of the air in the attic space and the ceiling space is a hot water supply means It can go down during hot water supply operation and can quickly and smoothly store cold air in the cold storage space.

Next, an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a hot water supply means, which includes a hot water supply heat pump unit 2 using carbon dioxide, which is a natural refrigerant, and a tank unit 3 for storing hot water heated by heat exchange in the hot water supply heat pump unit 2. .

  The hot water supply heat pump unit 2 includes a compressor 4 that compresses carbon dioxide, which is a refrigerant, and heat exchange for water heating that heats the feed water by exchanging heat between the refrigerant and the feed water that has become high temperature by the compressor 4. The heat exchanger 5, the expansion valve 6 that expands the refrigerant heated in the water supply heat exchanger 5, and the refrigerant that has become low temperature in the expansion valve 6 and the outside air to absorb heat to the refrigerant. The air heat exchanger 7 to be used constitutes a refrigeration cycle. The water heating heat exchanger 5 is supplied with water sent from the water inlet 8 by the pump 9 and exchanges heat, and then the water outlet. 10, and the air heat exchanger 7 is exhausted from the air exhaust port 13 after the outside air blown by the fan 12 flows from the air intake port 11 to exchange heat.

  In addition, when the hot water supply means 1 is operated to store hot water, the tank unit 3 has hot water fed from the water outlet 10 of the hot water supply heat pump unit 2 flowing in from above and having a temperature higher than that of hot water flowing in from above. When low water flows out from below into the water inlet 8 of the hot water supply heat pump unit 2 and when the hot water supply means 1 supplies hot water, low-temperature tap water flows in from the connected water pipe 14 from below, and high temperature from above. A hot water storage tank 15 from which water flows out, and a hot water mixing valve 16 for mixing hot water from the hot water storage tank 15 and cold tap water to supply hot water at a temperature set by a trading company when the hot water supply means 1 supplies hot water; It is equipped with.

  Reference numeral 17 denotes a cooling air supply means, which is provided above the attic space and above the ceiling space between the first floor and the second floor, and cool air exhausted when the hot water supply means 1 operates to store hot water is used as the attic space or ceiling. The air supply / cooling device 18 having an electric opening / closing function that blows out to the back space, and the air cooler 18 that is provided below the attic space and below the ceiling space between the first floor and the second floor, exhausts the air in the attic space and the ceiling space to the outside. An open / close ventilation fan 19, a cold air supply pipe 20 connecting the hot water supply heat pump unit 2 and the cold water supply device 18 to supply low temperature air exhausted from the hot water supply heat pump unit 2 to the cold water supply device 18, winter A cold air escape pipe 21 connected to the hot water supply heat pump unit 2 and the cold air supply pipe 20 are used to exhaust the low-temperature air exhausted from the hot water supply heat pump unit 2 to the outside when the air supply is not cooled. Provided to the connection portion with the cold air relief pipe 21, in which and a switching valve 22 for switching flow to the cold pipe 20, or cold air relief pipe 21 feeding a low-temperature air exhausted from the hot water supply heat pump unit 2.

  Reference numeral 23 denotes a cooling assist means, which is provided in the attic and the attic, and detects the temperature of the attic space and the attic space, and the temperature sensor 24 for detecting the temperature of a room where a person is often present such as a living room or a bedroom. 25, the cooling auxiliary opening / closing valve 27 provided in the ventilation pipe 26 communicating the attic and the room, the ceiling and the room, and the detection signals of the temperature sensor 24 for the attic and the temperature sensor 25 for the room are input, A cooling auxiliary control device 28 that outputs the temperature of the attic space and the ceiling space at that time and the temperature of the living room and the bedroom as temperature signals and controls the opening / closing operation of the cooling auxiliary opening / closing valve 27 is provided.

  Reference numeral 29 denotes air conditioning means, which is provided in an air conditioning heat pump unit 30 using a chlorofluorocarbon refrigerant and a room such as a living room or a bedroom, and is connected to the air conditioning heat pump unit 30 by an air conditioning pipe 31. An air conditioner 32 that cools indoor air by exchanging heat between the refrigerant cooled by the unit 30 and indoor air is provided.

Next, the specific installation state in the house of the said hot-water supply means 1, the cool air supply means 17, the cooling assistance means 23, and the air-conditioning means 29 is demonstrated.
As shown in FIG. 1, in a highly airtight and highly insulated house in which the interior space of the building is covered with an airtight heat insulating layer 33, the hot water supply heat pump unit 2 and the tank unit 3 of the hot water supply means 1 are installed outdoors. A switching valve 22 is provided at a substantially intermediate portion of the cold air escape pipe 21 having one end connected to the air exhaust port 13 and the other end open, and one end of the cold air supply pipe 20 is connected to the switching valve 22. Yes.

  The cooling air pipe 20 is constructed so as not to deteriorate the airtightness and the heat insulating property, and penetrates the airtight heat insulating layer 33, above the attic space and above the ceiling space between the first floor and the second floor. It is connected to the cool air supply device 18 of the provided cool air supply means 17.

  The air-tight heat insulating layer 33 below the attic space and below the ceiling space between the first floor and the second floor, when the cool air supply device 18 is opened and blows out the cold air, the air in the attic space and the ceiling space is exposed outdoors. The open / close type ventilation fan 19 having an electric opening / closing function that is opened for exhausting is provided in a state of being penetrated through the airtight heat insulating layer 33 after being constructed so as not to deteriorate the airtightness and heat insulating property. .

  Also, an attic temperature sensor 24 is provided in the space of the attic and the attic, and an in-room temperature sensor 25 is provided in the room under the attic and the attic, and the attic and under-attic rooms, the attic and the ceiling. A ventilation pipe 26 of a cooling auxiliary means 23 having a cooling auxiliary opening / closing valve 27 communicates between the attic and the living room, and the ceiling and the living room at a part that becomes a boundary with the lower lower room, that is, a ceiling part of the lower living room. The temperature sensor 24 for the attic and the temperature sensor 25 for the room are connected to a cooling auxiliary control device 28 that controls the opening / closing operation of the cooling auxiliary opening / closing valve 27 by the temperature sensor signal line 34. The on-off valve 27 is connected to the cooling auxiliary control device 28 by an on-off valve signal line 35.

  The air-conditioning heat pump unit 30 of the air-conditioning means 29 is installed outdoors, the air conditioner 32 that cools the indoor air is installed in the room, and the air-conditioning heat pump unit 30 and the air conditioner 32 are airtight and heat-insulating. After being constructed so as not to decrease, it is connected by an air conditioning pipe 31 penetrating the hermetic heat insulating layer 33.

  In addition, a hot water storage operation switch (not shown) of the hot water supply means 1, a cool air supply operation switch (not shown) of the cool air supply means 17, a cooling assistance operation switch (not shown) of the cooling assistance means 23, and an air conditioning operation of the air conditioning means 29. An operation panel 38 having an operation unit 36 provided with various switches such as a switch (not shown) and an operation panel control unit 37 for controlling each operation is provided indoors, and the operation panel 38 and hot water supply means are provided. 1. The cooling air supply means 17, the cooling auxiliary means 23, and the air conditioning means 29 are each connected by an operation panel signal line 39.

Next, the operation of one embodiment of the present invention will be described.
First, FIG. 4 is a flowchart of the cooling / air supply operation control of the cooling apparatus according to this embodiment. First, the operation panel control unit 37 confirms whether the cooling / air supply operation switch is ON (S1), and the supply / cooling air operation switch. Since the hot water storage operation switch is in the ON state while the power is on, the hot water supply heat pump unit 2 operates in the time zone of low-power electricity at low electricity charges and starts the hot water storage operation. When it is confirmed that hot water having a preset temperature has started to be stored in the tank unit 3 (S2), the switching valve 22 is operated to supply the cold air flowing from the hot water supply heat pump unit 2 to the cold air escape pipe 21. The cold air pipe 20 is made to flow. (S3)

  Next, the cool air supply device 18 provided above the attic space or above the attic space is operated and opened (S4), so that the cool air from the hot water supply heat pump unit 2 is blown out to the attic space or the attic space. At the same time, the openable ventilation fan 19 provided below the attic space and below the ceiling space is also opened and operated (S5), and the air in the space is exhausted to the outside from below the attic space and the ceiling space. To do.

  As a result, air exhausted from the hot water supply heat pump unit 2, which is cool air having a low temperature of about 5 to 10 degrees with respect to the outside air, blows out into the space from above the attic space or from above the ceiling space, and into the cold air that blows out. The air in the attic space or ceiling space, which is hotter than that, is exhausted to the outside from the lower part of the attic space or ceiling space, so that the temperature of the air in the attic space or ceiling space rapidly decreases. The temperature of the air in the space or the ceiling space decreases during the midnight of the hot water supply operation of the hot water supply means, and the cold air can be stored quickly and smoothly in the cold storage space.

  When it is confirmed that the hot water having a preset temperature is completely stored in the tank unit 3 and the hot water storage operation of the hot water supply means 1 is finished and the heat pump unit 2 for hot water supply is stopped (S6), the cool air supply device 18 is turned on. While stopping and closing (S7), the opening-and-closing type ventilation fan 19 also stops operation | movement (S8), and stops exhausting the air in an attic space or a ceiling space outside.

  Since the attic space and the ceiling space, which are cold storage spaces for storing cold air, are covered with the airtight heat insulating layer 33, the cold air stored in the attic space and the ceiling space is cooled by the cool air supply device. The air in the attic space and the ceiling space can be kept at a low temperature without escaping through the air vent 18 and the open / close type ventilation fan 19 and without providing a special cold storage material.

  Finally, even if cold air is exhausted from the hot water supply heat pump unit 2, the switching valve 22 is operated so as to flow into the cold air escape pipe 21 (S9), and the cold air supply operation is completed. (S10)

  Next, FIG. 5 is a flowchart of the cooling assist operation control of the cooling apparatus according to the present embodiment. First, the operation panel control unit 37 confirms whether the cooling assist operation switch is ON (S11), and the cooling assist operation. When the air-conditioning operation switch is further operated and the cooling operation is turned on while the switch is ON, the air-conditioning heat pump unit 30 of the air-conditioning means 29 is first operated to cool the chlorofluorocarbon refrigerant, and the indoor air conditioner 32 is operated to perform a cooling operation for cooling the indoor air by exchanging heat between the cooled refrigerant and the indoor air.

  When it is confirmed that the cooling operation is started (S12), the operation panel control unit 37 next detects the attic space based on the detection signal from the attic temperature sensor 24 and the detection signal from the room temperature sensor 25. The temperature of the living room space below is compared (S13). When the temperature of the attic space is higher, it is determined that the cooling of the living room space is not possible, and the cooling operation of the air-conditioning means 29 is stopped. (S14), and if it is confirmed that the cooling operation of the air-conditioning means 29 has stopped, the process returns to (S11).

  Further, when the temperature of the living room space is higher in (S13), it is determined that the cooling of the living room space can be assisted, and the cooling of the ventilation pipe 26 that connects the attic space and the lower living room space is performed. The auxiliary on-off valve 27 is operated from the closed state to the open state. (S15)

  As a result, the air in the attic space, which has a lower temperature than the air in the living room space, is heavier than the air in the living room space, and therefore falls through the ventilation pipe 26 from the attic space to the living room space. Since the air in the space is lighter than the air in the attic space, it rises from the living room space to the attic space through the ventilation pipe 26.

  As a result, the temperature of the air in the living room space is lowered, and therefore, the living room space can be cooled to a temperature set earlier than the air conditioning means 29 is cooled only by the cooling operation.

  Then, the temperature of the attic space and the room space below it are compared by the detection signal from the attic temperature sensor 24 and the detection signal from the room temperature sensor 25 (S16). When the temperature exceeds the above temperature, it is determined that the cooling operation of the living room space cannot be assisted even if the vent pipe 26 is opened further, and the cooling auxiliary opening / closing valve 27 of the vent pipe 26 is operated from the open state to the closed state. (S17), the ventilation pipe 26 is cut off, and the cooling assist operation is completed. (S18)

  When it is confirmed that the cooling operation of the air-conditioning means 29 is stopped when the cooling auxiliary opening / closing valve 27 of the ventilation pipe 26 is open (S15), it is determined that the cooling operation is stopped. Then, the cooling auxiliary open / close valve 27 of the vent pipe 26 is operated from the open state to the closed state (S17), and the vent pipe 26 is made non-conductive to end the cooling assist operation. (S18)

  In the cooling assistance operation, the temperature of the attic space and the living room space below it are compared, and when the temperature of the attic space becomes equal to or higher than the temperature of the living room space below, the cooling auxiliary opening / closing valve 27 of the vent pipe 26 is set. When the cooling auxiliary open / close valve 27 of the vent pipe 26 is operated from the closed state to the open state after a predetermined time has elapsed after the cooling auxiliary open / close valve 27 of the vent pipe 26 is operated from the open state to the closed state. You may make it operate | move to a closed state.

  In this case, when the cooling auxiliary opening / closing valve 27 of the ventilation pipe 26 is operated from the open state to the closed state, the temperature of the attic space may still be lower than the temperature of the living room space below it. While the temperature of the living room space is lowered to some extent while the on-off valve 27 is in an open state, and the cooling auxiliary on-off valve 27 is in a closed state, the air-conditioning space 32 provided in the living room can be cooled. Thus, the temperature of the living room space can be quickly cooled to a predetermined temperature.

  As described above, in the present embodiment, the cold air exhausted during the hot water storage operation of the heat pump type hot water supply means 1 is supplied to the attic and ceiling spaces covered with the airtight heat insulating layer 33, and the attic and ceiling spaces are provided. Since the hot air is exhausted to the outdoors by the open-close type ventilation fan 19, the cold air generated when the hot water supply means 1 is stored in hot water using low-power electricity at low electricity charges smoothly and adequately. The cold air stored in the attic space and the ceiling space is not covered with the airtight heat insulating layer 33 in the attic space or the ceiling space, so that the temperature does not rise. The air can be kept cold.

  When a room under the attic or the ceiling is cooled by the air conditioner 32 installed in the room, the temperature of the space in the attic or the ceiling is compared with the temperature of the room below it. When the temperature of the lower room is higher than the temperature of the attic or ceiling space, the cooling auxiliary opening / closing valve 28 of the ventilation pipe 26 that connects the attic or ceiling space and the lower room space is closed. Since the state is changed to the open state, the air in the attic or ceiling space, which has a lower temperature than the air in the lower room, descends to the living room space through the ventilation pipe 26, and the temperature of the air in the lower room space is reduced. Lowering the temperature of the lower room faster than the cooling operation of the air-conditioning means 29 alone, and saving the electric power consumed by the cooling operation of the air-conditioning means 29 to the set temperature of the lower room space It can be cooled.

  When a room under the attic or the ceiling is cooled with the air conditioner 32 installed in the room, when the temperature of the room below the room is lower than the temperature of the space in the attic or ceiling Although the cooling auxiliary opening / closing valve 28 of the ventilation pipe 26 that communicates the space of the attic or the ceiling with the space of the room below is kept closed, the cooling auxiliary operation is not performed, but even in this state, The temperature of the space is low, and the temperature rise in the attic and ceiling space due to sunlight during the daytime can be suppressed. As a result, the cooling operation in the house can be weakened, and the electricity charge can be reduced accordingly. It is something that can be done.

  Also, if the hot water storage operation of the hot water supply means 1 is short and sufficient cold air is not supplied to the attic or ceiling space, the air temperature in the attic or ceiling space has not decreased, or the lower room If the temperature in the space in the lower room is lower than the temperature of the air in the attic or ceiling space, such as when the cooling operation is performed or immediately after the cooling operation is stopped, the attic or ceiling By leaving the cooling auxiliary on-off valve 28 of the ventilation pipe 26 communicating with the space of the room below and the space of the room below it closed, the air in the space of the attic or the back of the ceiling is made in the space of the lower room It is possible to prevent the internal temperature from rising.

Schematic which shows embodiment of the air conditioning apparatus which attached | subjected one Embodiment of this invention. FIG. The block diagram which shows the hot-water supply means used for this invention. The flowchart figure of the same cool air supply operation control. The flowchart figure of the air_conditioning | cooling auxiliary | assistant operation control.

Explanation of symbols

1 Hot water supply means 17 Cooling air supply means 23 Cooling auxiliary means 29 Air conditioning means

Claims (4)

  In a cooling device that supplies cold air generated during hot water supply operation of a hot water supply means that performs hot water supply operation by a refrigeration cycle into the building by the cold water supply means, the cold air is stored in a cold storage space in the building, A cooling device comprising: cooling auxiliary means for supplying cold air stored in the cold storage space to the indoor space to be cooled when the air conditioning means for air-conditioning the indoor space starts a cooling operation.   The hot water supply means constitutes a refrigeration cycle with a compressor, a heat exchanger for water heating, an expansion valve, and a heat exchanger for air, and uses carbon dioxide as a heat medium for the refrigeration cycle. A hot water supply heat pump unit that is used in a supercritical state, and a tank unit that stores hot water heated by heat exchange by the hot water supply heat pump unit, and the building has a highly airtight and highly heat insulating structure, The cooling apparatus according to claim 1, wherein the cold storage space is an attic space or a ceiling space having a high airtight and highly heat insulating structure.   The cooling assist means communicates a room temperature sensor that detects the temperature of the indoor space, a temperature sensor for the attic that detects the temperature of the attic space and the ceiling space of the cold storage space, the attic and the living room, and the attic and the living room. And when the air conditioning means starts cooling operation, the temperature of the room space is compared with the temperature of the attic space or the ceiling space and the room space below it. When the air temperature is lower, the cooling auxiliary opening / closing valve of the ventilation pipe is kept closed.When the temperature of the living room is higher, the cooling auxiliary opening / closing valve is opened, and after opening the cooling auxiliary opening / closing valve, 3. The cooling device according to claim 1, further comprising an operation panel control unit that performs a cooling assistance operation for closing the cooling assistance on / off valve when the temperature becomes lower.   The attic space and ceiling space, which are the cold storage spaces, are provided with an open / close ventilation fan that exhausts the air in the attic space and the ceiling space to the outside when the supply of cold air generated by the hot water supply means is started. The cooling device according to claim 3.

Images