JPH0722375U - Air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide an air conditioner that uses the hot water of a boiler to ensure the heating capacity of a heat pump type air conditioner and to perform continuous heating operation. [Structure] An outdoor blower 107, a compressor 102 connected by copper pipes, respectively, and a four-way valve 1 capable of switching between heating and cooling
03, the electric expansion valve 106, the outdoor heat exchanger 104, and the heat exchanger temperature sensor 1 on the liquid side of the outdoor heat exchanger 104.
05, and a hot water radiator 3 having a hot water control valve 4 for controlling the flow rate of hot water is provided on the windward side of the outdoor heat exchanger 104.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat pump type air conditioner that assists heating operation.

[0002]

[Prior art]

 In recent years, air-conditioning type heat pump type air conditioners, which can be used both in summer and winter, have become quite popular in residential air conditioning, and in particular, there is a growing demand for higher-performance heating capacity that depends on the outside air temperature.

Conventionally, an air conditioner of this type generally has a structure as shown in FIG. The configuration will be described with reference to FIG.

As shown in the figure, a conventional air conditioner 101 includes a compressor 102, a four-way valve 103 for switching a refrigerant circuit between cooling operation and heating operation, an outdoor heat exchanger 104, and the outdoor heat A heat exchanger temperature sensor 105 is provided on the liquid side of the exchanger 104, and an electric expansion valve 106 for decompressing the refrigerant is connected to each by copper pipes, and the outdoor side is on the lee side of the outdoor heat exchanger 104. An outdoor unit 108 provided with a blower 107 and an indoor unit 111 made up of an indoor heat exchanger 109 and an indoor blower 110, and a gas side three-way valve 11 provided in the outdoor unit 108. 3 and the liquid side three-way valve 114 and the connecting pipes 112a and 112b were connected to the indoor unit 111.

In the above configuration, when the heating operation is started, the four-way valve 103 is set at a position (as shown in the figure) that connects the compressor 102 and the indoor heat exchanger 109, and the refrigerant is compressed by the compressor 102. And is compressed into high-pressure gas, flows through the four-way valve 103, the gas-side three-way valve 113 and the connecting pipe 112a, and then flows into the indoor heat exchanger 109.

Since the refrigerant is cooled by the indoor blower 110, it is condensed and changed into a high-pressure liquid. On the other hand, the indoor air is heated by getting heat from the refrigerant to be heated.

Further, the refrigerant flows from the liquid side three-way valve 114 to the outdoor unit 108 via the connection pipe 112b, and is decompressed and expanded by the electric expansion valve 106 to a saturation pressure lower than the outside air temperature to become a low pressure liquid, and the outdoor side. The heat exchanger 104 removes heat from the outside air and evaporates to become a low-pressure gas and returns to the compressor 102.

The refrigerant was again compressed by the compressor 102, and the above cycle was repeated to continue the heating operation.

When the outside air temperature becomes low, frost forms on the outdoor heat exchanger 104, heat cannot be sufficiently exchanged, and the heat exchanger temperature sensor 105 determines the frosted state. Once, the heating operation is stopped, the four-way valve 103 is set to the position where the compressor 102 and the outdoor heat exchanger 104 are connected in the same manner as during the cooling operation, and after waiting for the pressure equalizing state of the refrigerant, compression is performed. The machine 102 was operated and high-temperature high-pressure gas was passed through the outdoor heat exchanger 104 to remove frost, stop the operation again, and switch the four-way valve to start the heating operation.

[0010]

[Problems to be solved by the device]

 In such a conventional air conditioner, during heating operation, the required heating capacity cannot be ensured when the outside temperature is low, and the outdoor side heat exchange can be performed when the outside temperature is particularly low (especially in semi-cold regions). There was a problem that frost was generated on the container 104, heating operation could not be continuously performed, and sufficient heating could not be performed.

Further, because of the above-mentioned configuration, in a semi-cold region, a heat pump type air conditioner is used for cooling operation in the summer, and a heat pump type air conditioner is not used in the winter, and kerosene or a propane gas boiler is used. Although it is often the case that hot water is boiled and heating is performed by an air conditioner that only has an indoor radiator, the difference in air conditioner between summer and winter causes a problem of high equipment cost.

In addition, there is a problem that it is not easy to operate a heat pump type air conditioner with a good COP (coefficient of performance) while avoiding frost formation during heating, especially in a house with a boiler facility in a semi-cold region. It was

The present invention solves the above-mentioned problems, and in a house equipped with a boiler facility, the heating capacity is ensured independently of the outside temperature during heating operation, and the frost formation does not occur and the heating operation is continuously performed. The first object is to provide an air conditioner that can be performed by

A second object of the present invention is to provide an auxiliary heat exchanger that can meet the above-mentioned first object by retrofitting a conventional heat pump type air conditioner in a house with a boiler facility.

A third object is to easily and surely install the auxiliary heat exchanger, which is the second object, in a house having a boiler facility.

[0016]

[Means for Solving the Problems]

 In the air conditioner of the present invention, in order to achieve the first object, a first means is an outdoor blower, a compressor connected by a copper pipe, a four-way valve capable of switching between heating and cooling, an electric expansion valve, and an outdoor side. A heat exchanger and a heat exchanger temperature sensor are provided on the liquid side of the outdoor heat exchanger, and a hot water control valve for controlling the flow rate of hot water supplied from the boiler is provided on the windward side of the outdoor heat exchanger. It is configured to have a hot water radiator.

Further, in order to achieve the second object, the second means is to grasp the heating operation state and the hot water radiator provided with the hot water control valve for controlling the flow rate of the hot water supplied from the boiler. It is equipped with a supplementary heat exchanger consisting of an outside air temperature sensor, a high temperature gas sensor, and a control device that can start and stop the boiler.

Further, in order to achieve the third object, the third means has an arc having the same diameter as the copper pipe of the outdoor heat exchanger and a pitch equivalent to that of the copper pipe, The structure is such that the auxiliary heat exchanger can be fixed to the outdoor heat exchanger by a plate with the same thickness as the fin pitch.

[0019]

[Action]

 According to the first aspect of the present invention, since the air is warmed by the hot water radiator by the hot water from the boiler in the house with the boiler equipment and the warmed air passes through the outdoor side heat exchanger, Even if the outside air temperature is low, the heating capacity can be secured, frost is less likely to occur, and the heating operation can be performed continuously, enabling sufficient heating.

Also, by the configuration of the second means, the same as the above-mentioned first means by attaching the auxiliary heat exchanger to a conventional heat pump type air conditioner in a house with a boiler facility afterwards. It is possible to secure sufficient heating capacity, frost does not easily occur, and it is possible to perform sufficient heating.

Further, the configuration of the third means makes it possible to easily attach the auxiliary heat exchanger of the second means to the outdoor heat exchanger.

[0022]

【Example】

 First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIG. The same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in the figure, a hot water radiator 3 in which hot water flows from the boiler 2 is provided on the windward side of the outdoor heat exchanger 104 provided in the air conditioner 1, and the flow rate is adjusted at the hot water inlet of the hot water radiator 3. An outdoor unit 5 is configured by providing a hot water control valve 4 that can be used.

Further, when hot water is required, the operation start signal can be transmitted to the boiler 2 (not shown).

In the above configuration, when heating operation is started, the four-way valve 103 is set at a position connecting the compressor 102 and the indoor heat exchanger 109 as shown in the figure, and the cooling medium is the compressor. The high-pressure gas is compressed in 102, flows through the four-way valve 103, the gas-side three-way valve 113 and the connection pipe 112a, and then flows into the indoor heat exchanger 109.

Then, the indoor blower 110 cools the refrigerant so that it is condensed and converted into a high-pressure liquid. On the other hand, the indoor air is heated by getting heat from the refrigerant to be heated.

Further, the refrigerant flows from the liquid side three-way valve 114 to the outdoor unit 5 via the connection pipe 112b, and is decompressed and expanded by the electric expansion valve 106 to a saturation pressure lower than the outside air temperature or lower to become a low pressure liquid. The heat exchanger 104 removes heat from the outside air and evaporates to become low-pressure gas, which returns to the compressor 102.

Then, the refrigerant is again compressed by the compressor 102, and the above cycle is repeated to continue the heating operation.

When the outside air temperature becomes low, the heat exchanger temperature sensor 105 determines the frosting state before the outdoor heat exchanger 104 is frosted, and sends a signal to start operation to the boiler 2. The hot water is generated in the boiler 2 and the hot water flows to the hot water radiator 3. The opening / closing degree of the hot water control valve 4 is controlled by the temperature of the heat exchanger temperature sensor 105, the flow rate of the hot water is changed, and the intake air temperature of the outdoor heat exchanger 104 is raised above the outside air temperature. It is easy to evaporate, and it is possible to continue optimal heating operation while securing the heating capacity.

Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. As shown in the figure, the auxiliary heat exchanger 6 is provided with a hot water radiator 3 composed of a hairpin tube, a hot water control valve 4 for controlling the hot water flow rate at the hot water inlet side of the hot water radiator 3, and an outside air temperature sensor. 7 and the high temperature gas sensor 8 attached to the connection pipe 112a connected to the gas side three-way valve 113 in the outdoor unit 108, and the hot water control valve 4, the outside air temperature sensor 7 and the high temperature gas sensor 8 are provided. The control device 9 is connected to the control device 9, and the control device 9 is also configured to be able to transmit a signal for starting and stopping the boiler 2.

Further, as shown in FIG. 4, the hot water radiator 3 uses a hairpin tube, but a low fin tube or the like may be used to enhance heat radiation efficiency.

The auxiliary heat exchanger 6 has a structure in which covers 10a and 10b also serving as side plates are provided at both ends, and legs 11 are provided below the covers 10a and 10b.

In the above structure, the auxiliary heat exchanger 6 is installed behind the outdoor unit 108 to perform the heating operation as in the first embodiment of the present invention. During the heating operation, the auxiliary heat exchanger 6 is controlled. In the device 9, the outside air temperature sensor 7 determines whether it is summer or winter, and the high temperature gas sensor 8 determines whether the compressor 102 is operating. When the heating operation is determined, a signal to start the operation is transmitted to the boiler 2, hot water flows, the temperature of the hot gas sensor 8 controls the hot water control valve 4, and the temperature of the air sucked into the outdoor heat exchanger 104 is controlled. By raising it, it becomes possible to secure the heating capacity.

Third Embodiment Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the second embodiment are designated by the same reference numerals and detailed description thereof will be omitted. As shown in the figure, on the outdoor unit 108 side of the covers 10c and 10d of the auxiliary heat exchanger 6A, there is a fixture 12 made of resin having a thickness equal to the fin pitch of the outdoor heat exchanger 104, One side of the fixing tool 12 is integrated with the covers 10c and 10d, and the other side of the fixing tool 12 is a notched arc (having a length of a semicircle or more) of the same diameter as the copper pipe 104a of the outdoor heat exchanger 104. 5 are arranged vertically at an equal pitch to each other between the copper tubes 104a of the outdoor heat exchanger 104, and a rectangular notch is provided at the center between the arcs 13. Between the cutout portion 14 and the cutout portion 14, there is provided a claw portion 15 having a rounded tip having a symmetrical shape with the cutout portion 14 as an axis.

In the above-mentioned configuration, the continuous heating operation can be enabled similarly to the second embodiment of the present invention, and the auxiliary heat exchanger 6 A is attached to the outdoor heat exchanger 104 of the outdoor unit 108. If the fixtures 12 protruding from the covers 10c and 10d at both ends of the auxiliary heat exchanger 6A are strongly inserted into the outdoor heat exchanger 104 by aligning the positions of the copper pipe 104a and the arc 13 between the fins, Using the space of the cutout portion 14, the tip of the claw portion 15 can be inserted while opening when the claw portion 15 passes through the copper tube, and can be fixed without closing the claw portion 15 once it passes.

[0035]

[Effect of device]

 As is apparent from the above embodiments, according to the present invention, the hot water radiator provided with the hot water control valve for controlling the flow rate of hot water supplied from the boiler is provided on the windward side of the outdoor heat exchanger. In a house equipped with a boiler, the heating capacity is ensured without being affected by the outside air temperature during heating operation, and since frost does not occur, it is possible to provide an air conditioner that can perform continuous heating operation. it can.

In addition, in a house with a boiler facility, by retrofitting to a conventional heat pump type air conditioner, the heating capacity is ensured regardless of the outside temperature during heating operation, and frost does not occur. It is possible to provide an air conditioner equipped with an auxiliary heat exchanger that can continuously perform heating operation.

In addition, it is possible to provide an air conditioner in which the above-mentioned auxiliary heat exchanger can be easily and surely installed in a house with a boiler facility.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram showing a configuration of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a refrigeration cycle diagram showing the configuration of the air conditioner of the second embodiment.

FIG. 3 is a side view of the air conditioner of the second embodiment.

FIG. 4 is a front view of the auxiliary heat exchanger according to the second embodiment.

FIG. 5 is a front view of the auxiliary heat exchanger according to the third embodiment.

FIG. 6 is a side view of the air conditioner of the third embodiment.

FIG. 7 is a partial side view of a fixture according to the third embodiment.

FIG. 8 is a refrigeration cycle diagram showing the configuration of a conventional air conditioner.

[Explanation of symbols]

 2 Boiler 3 Hot water radiator 4 Hot water control valve 6 Auxiliary heat exchanger 6A Auxiliary heat exchanger 7 Outside air temperature sensor 8 High temperature gas sensor 9 Controller 12 Fixture 13 Arc 102 Compressor 103 Four way valve 104 Outdoor heat exchanger 104a Copper pipe 105 heat exchanger temperature sensor 106 electric expansion valve 107 outdoor fan

Claims (3)

[Scope of utility model registration request] 1. An outdoor blower, a compressor connected by a copper pipe, a four-way valve capable of switching between heating and cooling, an electric expansion valve, an outdoor heat exchanger, and a heat exchanger on the liquid side of the outdoor heat exchanger. An air conditioner equipped with a temperature sensor and a hot water radiator provided with a hot water control valve for controlling the flow rate of hot water supplied from a boiler on the windward side of the outdoor heat exchanger. 2. A hot water radiator provided with a hot water control valve for controlling the flow rate of hot water supplied from the boiler, an outside air temperature sensor for grasping a heating operation state, a high temperature gas sensor, and a control device capable of starting and stopping the boiler. An air conditioner equipped with an auxiliary heat exchanger. 3. An auxiliary heat exchanger is provided by a plate having an arc having the same diameter as the copper pipe of the outdoor heat exchanger and a pitch equal to that of the copper pipe, and having a thickness equal to the fin pitch of the outdoor heat exchanger. The air conditioner according to claim 2, wherein the air conditioner can be fixed to the outdoor heat exchanger.